Forming blade chip pocket and method of manufacturing same

Abstract

The application relates to the technical field of forming turning processing, and discloses a forming tool chip rolling groove and a manufacturing method thereof, which comprises the following steps: S001: according to the radial dimension size of a processing object, the radius lengths of a first circular arc and a second circular arc are determined, and the difference between the radius lengths of the first circular arc and the second circular arc is at least greater than half of the radius length of the second circular arc; S002: according to the width of a forming surface, the included angle alpha between a straight line and a horizontal line is determined; S003: the first circular arc, the second circular arc and the straight line are connected through a preset mode; and S004: the first circle center and the second circle center are connected through a connecting line, and the connecting line forms the included angle beta with a vertical direction straight line. The forming tool chip rolling groove cannot adapt to the forming machining requirement of non-uniform and symmetrical distribution of cutting force, and the problem that the forming tool blade edge wear is intensified due to poor chip removal can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of forming turning technology, specifically to a forming tool chip groove and its manufacturing method. Background Technology

[0002] In the traditional machining process of bearing ring raceways, forming tools are typically used. These forming tools generally employ a combination of straight and curved chip grooves for chip curling and removal, with the curved portion primarily used for chip curling and guiding the chip removal process.

[0003] However, traditional tool chip grooves are difficult to handle asymmetrical machining objects. For example, when machining wheel bearing channels, which typically have asymmetrical shapes with different geometric parameters and radii of curvature, the cutting forces are unevenly distributed. Traditional tool chip grooves often cannot adapt to this uneven cutting force distribution, which may lead to increased cutting vibration and tool wear, resulting in lower machining efficiency, longer machining cycles, and reduced production efficiency.

[0004] In view of this, the inventor has invented a forming blade chip groove and its manufacturing method to solve the above problems. Summary of the Invention

[0005] The present invention aims to provide a chip groove for forming tools and a method for manufacturing the same, in order to solve the problem that existing chip grooves for forming tools cannot adapt to the needs of non-uniform and symmetrically distributed forming processes, which may lead to accelerated tool wear during processing.

[0006] To solve the above problems, the present invention adopts the following technical solution: A method for manufacturing a chip groove for forming a forming tool, used for forming a wheel hub bearing, comprising the following steps:

[0007] S001: Determine the radius lengths of the first arc and the second arc based on the radial dimension of the workpiece being machined by the tool. The difference between the radius lengths of the first arc and the second arc shall be at least half the radius length of the second arc.

[0008] S002: Determine the angle α between the straight line and the horizontal line based on the width of the forming surface of the object being machined by the tool;

[0009] S003: Connect the first arc, the second arc, and the straight line in a preset manner;

[0010] S004: Connect the first center and the second center with a connecting line, and the connecting line forms an angle β with the vertical straight line.

[0011] The principle and advantages of this solution are as follows: This invention provides a method for manufacturing a chip groove for a forming tool. In practical applications, the chip groove consists of three parts: a first arc, a second arc, and a straight line. This allows the chip groove to meet the asymmetric cutting requirements of wheel hub bearings. Specifically, the first arc is the cutting edge and the chip-carrying space. The rake angle of the arc is sharper and the chip-carrying space is larger than that of the straight line in the original solution. This meets the requirement of asymmetric and uniform distribution of cutting force during wheel hub bearing groove machining, thereby avoiding accelerated tool wear and extending tool life.

[0012] Preferably, as an improvement, the preset method is to connect the first arc and the second arc in a tangential manner.

[0013] Beneficial effects: The tangential method makes the connection between the first arc, the second arc, and the straight line relatively smooth, and also makes the cutting edge sharper.

[0014] Preferably, as an improvement, the connection point between the second arc and the first arc is configured as the lowest point of the chip groove formed by the first arc, the second arc, and the straight line.

[0015] Beneficial effect: Because the connection point of the first and second arcs is located at the lowest point of the entire chip groove, the extension distribution of the entire chip groove is relatively smooth, from high to low and then back to high.

[0016] Preferably, as an improvement, the distance between the first center and the second center in the horizontal direction is X, and the length of X conforms to the formula X=(Rr). Sinβ.

[0017] Beneficial effect: This formula can be used to determine the horizontal distance between the two centers of a circle by adjusting the angle of β.

[0018] Preferably, as an improvement, the distance between the first center and the second center in the vertical direction is Y, and the length of Y conforms to the formula Y=(Rr). Cosβ.

[0019] Beneficial effect: This formula can be used to determine the vertical distance between the two centers of a circle by adjusting the angle of β.

[0020] Preferably, as an improvement, the method further includes the following steps:

[0021] S005: When the workpiece being machined by the tool changes, the relative distance between the first and second centers is changed by adjusting β, so as to adjust the degree of downward concavity of the chip groove formed by the first arc, the second arc and the straight line in the vertical direction, in order to adapt to the radial size and forming surface width of the workpiece being machined by the tool.

[0022] Beneficial effects: By adjusting β, the first and second centers can be adjusted in both vertical and horizontal directions. The relative distance between the first and second centers will change as the positions of the first and second centers change. When the β angle between the first and second centers is smaller, the chip groove will be more concave downwards. When the β angle between the first and second centers is larger, the chip groove will be less concave downwards.

[0023] Preferably, as an improvement, the adjustment range of β is between [0°, 30°].

[0024] Beneficial effects: By controlling the angle range of β between 0° and 30°, it is possible to adjust the angle as much as possible according to the shape and size of the actual object being machined, while ensuring the sharpness of the cutting edge.

[0025] Preferably, as an improvement, the included angle α is adjusted within the range of [0°, 45°].

[0026] Beneficial effect: By controlling the included angle α within the range of 0° to 45°, the chips generated during processing, such as iron filings, are discharged from the straight section area, preventing iron filings from remaining in the chip groove or becoming entangled.

[0027] The present invention also provides a chip groove for a forming cutter, which is formed by the above-mentioned chip groove manufacturing method for forming cutters. As an improvement, it includes a cutter body, on which a chip groove is formed. The longitudinal section of the chip groove includes a first arc, a second arc, and a straight line, which are connected sequentially by means of tangency.

[0028] Preferably, as an improvement, the centers of the first arc and the second arc are connected by a connecting line, and the connecting line has an angle β with the vertical straight line; the first arc, the second arc, and the straight line are configured to adjust the degree of concavity of the first arc, the second arc, and the straight line as a whole by changing the size of the angle β, so as to adapt to processing objects with different radial dimensions and forming surface widths.

[0029] Beneficial effects: Compared with the existing technology, by setting this chip groove composed of a first arc, a second arc, and a straight line, the first arc is the cutting edge and chip-carrying space. The rake angle of the arc is sharper and the chip-carrying space is larger than that of the straight line in the original solution. The latter half of the chip groove composed of the second arc and the straight line can play a good role in chip removal and chip guidance. At the same time, this solution can also adjust the value of β to adjust the first arc and the second arc, so that the degree of concavity of the line segment formed by the first arc and the second arc can be increased or decreased, thereby adapting to the processing objects with different processing requirements. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the chip groove provided in Embodiment 1 of the present invention in the state of included angle β=0°.

[0031] Figure 2 This is a schematic diagram of the chip groove provided in Embodiment 1 of the present invention in the state of included angle β=30°.

[0032] Figure 3 This is a schematic diagram of the state of the chip groove provided in Embodiment 1 of the present invention when the included angle β varies between 0° and 30°.

[0033] Figure 4 This is a three-dimensional front view of the lathe tool provided in Embodiment 2 of the present invention.

[0034] Figure 5 This is a top view of the three-dimensional structure of the lathe tool provided in Embodiment 2 of the present invention. Detailed Implementation

[0035] The following detailed description illustrates the specific implementation method:

[0036] The reference numerals in the accompanying drawings include: first arc 1, first center 11, first radius 12, second arc 2, second center 21, second radius 22, straight line 3, connecting line 4, tool body 5, and chip groove 51.

[0037] Example 1

[0038] like Figures 1 to 3 As shown, this embodiment provides a method for manufacturing a chip groove for a forming tool. The chip groove 51 is used to process the wheel hub bearing groove, including the following steps: S001: Determine the radius lengths of the first arc 1 and the second arc 2 according to the radial dimension of the object being processed by the tool, wherein the difference between the radius lengths of the first arc 1 and the second arc 2 is at least greater than half the radius length of the second arc 2; as a preferred embodiment, such as Figure 1 As shown, the difference between the first radius 12 and the second radius 22 is at least greater than half of the second radius 22. The larger length of the first radius 12 makes the curvature of the circle containing the first arc 1 smaller, so the chip space on the first arc 1 is larger. The curvature of the second arc is larger than that of the first arc 1, which makes it easier for the iron chips to roll up during the chip removal process. When the tool cuts the material, the iron chips cut from the material can roll up smoothly without getting tangled. Such iron chips are easy to be discharged from the chip groove 51 and are not easy to block or get tangled.

[0039] S002: Based on the width of the forming surface of the workpiece being machined by the tool, determine the angle α between the straight line 3 and the horizontal line. As a preferred embodiment, the adjustment range of the angle α is between [0°, 45°]. In this embodiment, α is preferably 45°. Compared with the prior art, by setting a third straight line 3, compared with the design method that only uses a straight line and a second arc, the third straight line 3 can ensure that the tail surface of the chip groove 51 is inclined and extends upward. Figure 1 As shown, the combination of straight line 3 and second arc 2 ensures that the cut iron filings can be discharged well from the chip groove 51, rather than remaining in the chip groove 51.

[0040] S003: Connect the first arc 1, the second arc 2, and the straight line 3 in a preset manner. Specifically, as a preferred embodiment, such as... Figures 1 to 3 As shown, the preset method connects the first arc 1 and the second arc 2 tangentially. The connection point between the second arc 2 and the first arc 1 is configured as the lowest point of the chip groove 51 formed by the first arc 1, the second arc 2, and the straight line 3. The tangential connection of the first arc 1, the second arc 2, and the straight line 3 ensures a relatively smooth connection without obvious gaps or abrupt changes, guaranteeing the continuity and stability of the chip groove 51. Furthermore, configuring the connection point as the lowest point of the chip groove 51 means that the extension of the chip groove 51 at that point extends from high to low and then back to high. This layout makes the cutting edge of the chip groove 51 relatively sharp, which is beneficial for chip curling and removal, reducing tool wear.

[0041] S004: Connect the first center 11 and the second center 21 through connecting line 4, as follows: Figures 1 to 2 As shown, the connecting line 4 forms an angle β with the vertical straight line 3. Preferably, in this embodiment, the adjustment range of β is between [0°, 30°]. Controlling the size of the β angle allows for adjustment of the shape of the chip groove 51: by adjusting the angle of β, the relative distance between the first center 11 and the second center 21 in the vertical direction can be changed. This allows for adjustment of the shape of the chip groove 51, changing the degree of its downward concavity in the vertical direction. When the β angle is small, the chip groove 51 is more concave; when the β angle is large, the chip groove 51 is less concave. By adjusting the β angle, the shape requirements of the chip groove 51 can be adapted to the actual processing object. Specifically, since different processing objects may have different radial dimensions and forming surface widths, adjusting the β angle allows the chip groove 51 to adapt to the needs of different processing objects. For processing objects with larger radial dimensions and wider forming surfaces, a smaller β angle can be selected, resulting in a greater degree of downward concavity in the chip groove 51, providing a sharper cutting edge and a larger chip-carrying space, suitable for situations with a large amount of iron filings. Conversely, if... Figure 3The chip groove 51 located at the top, as shown, can be adjusted to a larger β angle for machining objects with smaller radial dimensions and smaller forming surfaces. This reduces the degree of downward indentation of the chip groove 51, thereby enhancing the cutting effect. A chip groove 51 with a larger degree of indentation can increase the sharpness of the cutting edge, making it particularly suitable for machining products with wide forming surfaces. Therefore, by adjusting the shape of the chip groove 51, the sharpness of the cutting edge and the chip space can be controlled to adapt to different machining objects.

[0042] Furthermore, as a preferred embodiment of the present invention, the distance between the first center 11 and the second center 21 in the horizontal direction is X, and the length of X conforms to the formula X=(Rr). Sinβ, the vertical distance between the first center 11 and the second center 21 is Y, and the length of Y conforms to the formula Y=(Rr). Cosβ also includes the following steps:

[0043] S005: When the workpiece being machined by the tool changes, the relative distance between the first center 11 and the second center 21 is changed by adjusting β, so as to adjust the degree of downward concavity of the chip groove 51 formed by the first arc 1, the second arc 2 and the straight line 3 in the vertical direction, in order to adapt to the size and forming surface width of the workpiece being machined by the tool.

[0044] Specifically, these two formulas determine the horizontal and vertical distances between the first center 11 and the second center 21 of the circle, based on the adjusted angle β. The formula is X=(Rr). Sinβ represents the horizontal distance between the first center 11 and the second center 21, where R is the first radius 12 of the first arc 1 and r is the second radius 22 of the second arc 2, and the formula is Y = (Rr). Cosβ represents the vertical distance between the first center 11 and the second center 21. By adjusting the angle of β, the relative distance between the two centers can be changed, thereby adjusting the degree of downward concavity of the chip groove 51, such as... Figure 3 As shown, when the included angle β is small, the degree of concavity of the chip groove 51 is greater, and when the included angle β is large, the degree of concavity of the chip groove 51 is smaller.

[0045] This embodiment provides a method for manufacturing a chip groove for a forming tool. In practical applications, the chip groove 51 is designed to consist of three parts: a first arc 1, a second arc 2, and a straight line 3. This allows the chip groove 51 to meet the asymmetric cutting requirements of wheel hub bearings. Specifically, the first arc 1 is the main cutting and chip-collecting part of the chip groove 51. When the difference in the radius length between the first arc 1 and the second arc 2 is greater than half the radius length of the second arc 2, the first arc 1 has a smaller curvature due to its larger radius. This results in a sharp cutting edge and a large chip-collecting space. Therefore, the first arc 1 can meet the cutting and chip removal requirements of wheel hub bearings with large radial dimensions and wide forming surfaces. This avoids chip entanglement and accelerated tool edge wear, extending tool life. Furthermore, the chip groove 51 can be adjusted by changing the degree of concavity of the chip groove 51 to adapt to different machining objects.

[0046] This embodiment can set up corresponding chip grooves for the processing object. Even for asymmetrical wheel hub bearings, it can adapt to and completely catch the chips generated by the symmetrical cutting force. The shape of the chip groove can smoothly complete chip removal and avoid blockage, effectively solving the problem that existing chip grooves cannot adapt to the processing of asymmetrical wheel hub bearings.

[0047] Example 2

[0048] This embodiment provides a chip groove for a forming blade, and also includes a method for manufacturing a chip groove for a forming blade as provided in this embodiment, such as... Figures 1 to 5 As shown, the tool includes a tool body 5, on which a chip-collecting groove 51 is formed. The chip-collecting groove 51 includes a first arc 1, a second arc 2, and a straight line 3. The first arc 1, the second arc 2, and the straight line 3 are connected sequentially in a tangential manner. Specifically, the length difference between the first arc 1 and the second arc 2 is at least greater than half the length of the second arc 2. By designing the chip-collecting groove 51 into three parts, the tool's chip-collecting groove 51 can complete the process of chip collection, chip collection, and chip removal. Furthermore, the centers of the first arc 1 and the second arc 2 are connected by a connecting line 4. The connecting line 4 and the vertical straight line 3 form an angle β. The first arc 1, the second arc 2, and the straight line 3 are configured such that the degree of concavity of the first arc 1, the second arc 2, and the straight line 3 can be adjusted by changing the size of the angle β, in order to adapt to machining objects of different sizes and forming surface widths, such as... Figures 1 to 2As shown, taking the two cases with included angle β of 0° and included angle β of 30° as examples, when included angle β is 0°, the overall concavity of the chip groove 51 is the largest, the cutting edge is the sharpest, and the chip space is the largest, which is suitable for processing products with large radial dimensions and wide forming surfaces. When included angle β is 30°, the overall concavity of the chip groove 51 is smaller, which is suitable for processing products with smaller forming surfaces. Therefore, this embodiment can adjust the shape of the chip groove 51 by adjusting the included angle β, so as to adapt to the different requirements of different processing objects. It has a compact structure and strong practicality.

[0049] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for manufacturing a chip groove for a forming blade, characterized in that, The longitudinal section of the chip groove includes a first circular arc, a second circular arc, and a straight line, and is used for forming the wheel hub bearing, including the following steps: S001: Determine the radius lengths of the first arc and the second arc based on the radial dimension of the workpiece being machined by the tool. The difference between the radius lengths of the first arc and the second arc shall be at least half the radius length of the second arc. S002: Determine the angle α between the straight line and the horizontal line based on the width of the forming surface of the object being machined by the tool; the adjustment range of the angle α is between [0°, 45°]; S003: Connect the first arc, the second arc, and the straight line in a preset manner; S004: Connect the first center and the second center with a connecting line, the connecting line forming an angle β with the vertical straight line; the adjustment range of β is between [0°, 30°]; S005: When the workpiece being machined by the tool changes, the relative distance between the first and second centers is changed by adjusting β, so as to adjust the degree of downward concavity of the chip groove formed by the first arc, the second arc and the straight line in the vertical direction, in order to adapt to the radial size and forming surface width of the workpiece being machined by the tool.

2. The method for manufacturing the chip groove of the forming blade according to claim 1, characterized in that, The preset method is to connect the first arc and the second arc by means of tangency.

3. The method for manufacturing the chip groove of the forming blade according to claim 2, characterized in that, The connection point between the second arc and the first arc is configured as the lowest point of the chip groove formed by the first arc, the second arc, and the straight line.

4. The method for manufacturing the chip groove of the forming blade according to claim 1, characterized in that, The horizontal distance between the first center and the second center is X, and the length of X conforms to the formula X=(Rr). Sinβ.

5. The method for manufacturing the chip groove of the forming blade according to claim 4, characterized in that, The distance between the first center and the second center in the vertical direction is Y, and the length of Y conforms to the formula Y=(Rr). Cosβ.

6. A forming tool, characterized in that, The tool includes a tool body, on which a chip groove is formed, the chip groove being manufactured by the chip groove manufacturing method of any one of claims 1-5.

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