A hydraulic milling machine with dimensional correction after quenching

Abstract

This disclosure relates to the technical field of shaft workpiece machining. One embodiment of this disclosure provides a hydraulic milling machine with dimensional correction after quenching, comprising: a frame and a moving column, the moving column being disposed on the frame; a clamping and fixing assembly being disposed on the frame; and a machining assembly being disposed on the moving column. The clamping and fixing assembly includes a pair of moving frames, which are horizontally linearly driven to be connected to both sides of the frame. A transmission sleeve, driven by electricity, is disposed on one side of each moving frame, and the transmission sleeves are located on the same axis. A boss is provided on the surface of the frame. This technical solution solves the technical problem in the prior art where milling force and the release of residual internal stress in the workpiece exacerbate deformation during machining, leading to a deviation in the accuracy of the machined surface.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of shaft workpiece machining, and more specifically, to a hydraulic milling machine with dimensionally correctable properties after quenching. Background Technology

[0002] In the field of mechanical manufacturing, shaft-type workpieces (such as motor shafts and transmission spindles) require surface milling on hydraulic milling machines after quenching to meet high-precision assembly requirements. While quenching improves the hardness and wear resistance of shaft-type workpieces, uneven temperature gradients can easily generate internal stress, leading to deformation problems such as bending and out-of-tolerance ovality. However, traditional hydraulic milling machines for forming have significant technical shortcomings: they cannot handle deformation problems when machining quenched shaft-type workpieces and lack real-time correction capabilities during processing, severely limiting workpiece machining accuracy and yield. Traditional hydraulic milling machines require manual inspection of the deformation degree before machining hardened shaft workpieces, followed by pre-fixing the workpiece using a special fixture. However, during machining, the milling force and the release of residual internal stress in the workpiece exacerbate the deformation, leading to deviations in the precision of the machined surface, such as taper deviations in the shaft diameter or excessive surface waviness. If the deformation exceeds the allowable range, the machine must be stopped and the fixture readjusted or the machining plan changed, significantly reducing production efficiency; some severely deformed workpieces may even be scrapped outright, resulting in a high scrap rate.

[0003] Therefore, the development of hydraulic milling machines that can correct the deformation of quenched shaft workpieces during processing has become an urgent need for the industry to improve processing accuracy and efficiency. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a hydraulic milling machine with dimensional correction after quenching, which solves the technical problem in the prior art that the milling force and the release of residual internal stress in the workpiece will aggravate deformation during the machining process, resulting in the deviation of the accuracy of the machined surface.

[0005] According to one aspect, at least one embodiment of this disclosure provides a hydraulic milling machine with dimensionally correctable properties after quenching, comprising: A platform and a movable column, wherein the movable column is mounted on the platform; A clamping and fixing assembly is disposed on the platform; A processing component, wherein the processing component is disposed on the movable column; The clamping and fixing assembly includes a pair of movable frames, which are connected to both sides of the platform by a horizontal linear drive. A transmission sleeve that is electrically driven to rotate is provided on one side of the movable frame. The transmission sleeve is located on the same axis. A boss is provided on the surface of the platform.

[0006] As a further technical solution, a first slag discharge port is provided on the surface of the boss, and a pair of movable seats are connected to both sides of the boss via a horizontal linear drive. The surfaces of the movable seats are vertically rotatably connected with clamping wheels.

[0007] As a further technical solution, a second slag discharge port is provided on the surface of the platform, the first slag discharge port is located directly above the second slag discharge port, a collection cover is provided at the bottom of the platform, the collection cover is located at the bottom of the second slag discharge port, and a drainage auger is provided inside the collection cover.

[0008] According to another aspect, in at least one embodiment of the present invention, the processing component includes a lifting sleeve, the lifting sleeve being movably connected to the moving column, and the lifting sleeve and the moving column being connected by a vertical linear drive.

[0009] As a further technical solution, a horizontal frame is fixedly connected to the surface of the lifting sleeve, and a slide is connected to the horizontal frame through a horizontal linear drive. A drive motor is installed in the slide, and a blade sleeve is provided at the output end of the drive motor.

[0010] As a further technical solution, the clamping wheel has an arc-shaped concave structure on its surface, and the inner surface of the transmission sleeve has a stepped structure.

[0011] As a further technical solution, the inner surfaces of both the first slag discharge port and the second slag discharge port are inclined structural surfaces.

[0012] As a further technical solution, telescopic covers are provided on both sides of the inner side of the boss.

[0013] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the clamping and fixing assembly solves the problem of easy deformation of workpieces after quenching through a multi-directional stable clamping design. The transmission sleeve coaxially clamps the workpiece from both ends and drives its rotation, while the clamping wheel at the boss provides lateral support from the middle section, forming a deformation-resistant structure with positioning at both ends and clamping in the middle section. This effectively counteracts the deformation caused by milling force and internal stress release. The arc-shaped concave clamping wheel fits the workpiece closely, avoiding local pressure damage and reducing rotational friction. This structure eliminates the need for repeated manual adjustment of the fixture, adapts to shaft-type workpieces of different lengths, ensures workpiece stability during processing, reduces the risk of surface accuracy deviation after machining, improves the pass rate of workpiece machining after quenching, and provides a reliable basis for dimensional correction. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 Appendix to this disclosure Figure 1 Enlarged view of part A in the middle; In the diagram: 1. Platform; 2. Moving column; 3. Clamping and fixing assembly; 3-1. Moving frame; 3-2. Transmission sleeve; 3-3. Boss; 3-4. First slag discharge port; 3-5. Moving seat; 3-6. Clamping wheel; 3-7. Second slag discharge port; 3-8. Collection cover; 3-9. Drainage auger; 4. Processing assembly; 4-1. Lifting sleeve; 4-2. Horizontal frame; 4-3. Slide seat; 4-4. Drive motor; 4-5. Tool holder; 5. Telescopic cover. Detailed Implementation

[0016] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0017] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0019] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.

[0021] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] like Figures 1-3 As shown, it illustrates a hydraulic milling machine with dimensionally correctable post-quenching properties according to an embodiment of the present disclosure, comprising: A platform 1 and a movable column 2, wherein the movable column 2 is mounted on the platform 1; Clamping and fixing component 3, wherein the clamping and fixing component 3 is disposed on the platform 1; Processing component 4, which is disposed on the movable column 2; The clamping and fixing assembly 3 includes a pair of movable frames 3-1, which are connected to both sides of the platform 1 by a horizontal linear drive. A transmission sleeve 3-2 driven by electricity is provided on one side of the movable frame 3-1. The transmission sleeve 3-2 is located on the same axis. A boss 3-3 is provided on the surface of the platform 1. A first slag discharge port 3-4 is opened on the surface of the boss 3-3. A pair of movable seats 3-5 are connected to both sides of the boss 3-3 by a horizontal linear drive. A clamping wheel 3-6 is vertically rotatably connected to the surface of each movable seat 3-5. A second slag discharge port 3-7 is opened on the surface of the platform 1. The first slag discharge port 3-4 is located directly above the second slag discharge port 3-7. A collection cover 3-8 is provided at the bottom of the platform 1. The collection cover 3-8 is located at the bottom of the second slag discharge port 3-7. A drainage auger 3-9 is provided inside the collection cover 3-8.

[0023] In some examples, to achieve stable clamping of quenched shaft parts, effectively prevent deformation of parts due to force or their own stress during processing, and ensure dimensional correction and processing accuracy, a clamping and fixing component 3 is designed. The movable frames 3-1 on both sides of the frame 1 are connected by horizontal linear drive components (such as hydraulic cylinders or servo cylinders), which can synchronously move closer or further away along the length of the frame 1 to meet the clamping requirements of shaft parts of different lengths. The movable frame 3-1 is connected to a transmission sleeve 3-2 by a bearing on one side, which is coaxially set and driven to rotate by electricity. The two ends of the shaft parts can be inserted into the transmission sleeve 3-2. The transmission sleeve 3-2 fixes the ends of the parts by clamping structures (such as expansion sleeves or bolts), which not only achieves axial positioning of the parts, but also drives the parts to rotate, meeting the processing requirements of different angles, while avoiding deformation of the ends of the parts due to uneven clamping force.

[0024] The boss 3-3 on the surface of the frame 1 provides mid-section support for shaft parts, preventing the mid-section from sagging due to the long length of the parts; the first slag discharge port 3-4 on the surface of the boss 3-3 corresponds vertically to the second slag discharge port 3-7 on the surface of the frame 1, and the waste generated during processing can fall into the collection cover 3-8 at the bottom of the frame 1 through the first slag discharge port 3-4 and the second slag discharge port 3-7 in sequence, avoiding the accumulation of waste between the parts and the clamping wheel 3-6, which affects the processing accuracy; the horizontal linear drive components (such as miniature electric cylinders) on both sides inside the boss 3-3 are fixedly connected to the moving seat 3-5, which can drive the moving seat 3-5 to move along the width direction of the boss 3-3, thereby adjusting the distance between the clamping wheel 3-6 and the parts.

[0025] The clamping wheels 3-6, which are vertically connected to the surface of the movable seat 3-5 via bearings, are symmetrically distributed on both sides of the part. The clamping wheels 3-6 can rotate synchronously with the part, reducing the frictional resistance with the part surface. At the same time, they apply uniform clamping force from both sides of the middle section of the part, preventing radial offset or vibration deformation during part processing. This is especially suitable for shaft parts with high hardness after quenching and easy to crack, preventing excessive clamping force from damaging the part.

[0026] The collection hood 3-8 at the bottom of the frame 1 is connected to the second slag discharge port 3-7, which can collect waste chips and cooling wastewater in a concentrated manner. The drainage auger 3-9 inside the collection hood 3-8 is driven by electricity to rotate, which can transport the collected waste chip and wastewater mixture towards the outlet of the collection hood 3-8, realizing the initial transportation of waste chips and wastewater and avoiding blockage inside the collection hood 3-8.

[0027] During operation, the movable frame 3-1 moves the transmission sleeve 3-2, and the two ends of the shaft-like parts are inserted into and fixed by the transmission sleeve 3-2; the movable seat 3-5 inside the boss 3-3 moves the clamping wheel 3-6 closer to the middle section of the part and clamps it; during processing, the transmission sleeve 3-2 drives the part to rotate, and the waste chips fall into the collection hood 3-8 through the slag discharge port, and the drainage auger 3-9 transports the waste material. The positioning at both ends and the clamping at the middle section work together to achieve anti-deformation clamping of the part, ensuring the accuracy of processing and dimensional correction.

[0028] like Figures 1-3 As shown in the figure, the processing component 4 in this embodiment includes a lifting sleeve 4-1, which is movably connected to the moving column 2. The lifting sleeve 4-1 and the moving column 2 are connected by a vertical linear drive. A crossbeam 4-2 is horizontally fixedly connected to the surface of the lifting sleeve 4-1. A slide block 4-3 is horizontally linearly connected inside the crossbeam 4-2. A drive motor 4-4 is installed inside the slide block 4-3. A tool sleeve 4-5 is provided at the output end of the drive motor 4-4.

[0029] In some examples, to achieve precise dimensional correction and stable machining of quenched shaft parts, adapt to machining requirements at different positions and depths, and ensure that the dimensions of the machined parts meet the process requirements, a machining component 4 is designed. The lifting sleeve 4-1, which is a movable set on the surface of the moving column 2, is connected to the moving column 2 through a vertical linear drive component (such as a hydraulic cylinder or ball screw). The drive component is fixed along the height direction of the moving column 2 and can drive the lifting sleeve 4-1 to rise and fall vertically along the moving column 2, thereby adjusting the vertical distance between the tool holder 4-5 and the part, controlling the machining depth, and adapting to the outer circle machining or dimensional correction requirements of shaft parts with different diameters. The precise control of the vertical linear drive component ensures that the lifting sleeve 4-1 rises and falls smoothly, avoiding machining dimensional deviations caused by fluctuations in the lifting speed. It is especially suitable for the characteristics of high hardness and high machining difficulty of quenched parts, ensuring the stability of the cutting process.

[0030] The horizontally fixed crossbeam 4-2 of the lifting sleeve 4-1 extends in a direction perpendicular to the moving column 2, providing horizontal movement support for the slide 4-3. The horizontal linear drive component (such as a servo cylinder) inside the crossbeam 4-2 is fixedly connected to the slide 4-3, which can drive the slide 4-3 to move horizontally along the length of the crossbeam 4-2, adjust the horizontal distance between the tool holder 4-5 and the part, realize the machining of different positions of the part in the axial direction, and complete the full-length machining without moving the clamped part, reducing the risk of part displacement. The drive motor 4-4 fixed inside the slide 4-3 by bolts has its output end coaxially connected to the tool holder 4-5. The motor adopts a high-torque, high-stability servo motor, which can provide continuous and uniform rotational power to the tool holder 4-5, ensuring that the tool has no speed fluctuation when cutting high-hardness parts after quenching, and avoiding tool wear or rough machining surface due to insufficient power.

[0031] The tool holder 4-5 uses a flexible collet or bolt clamping structure to fix the machining tools (such as milling cutters and grinding wheels), allowing for quick replacement of different types and specifications of tools to meet various machining needs such as external milling, dimensional correction, and surface polishing of parts. The coaxial design of the tool holder 4-5 and the drive motor 4-4 ensures that the tool rotates without wobble, further improving machining accuracy.

[0032] During operation, the cutting tool is selected and installed in the tool holder 4-5 according to the machining requirements; the lifting sleeve 4-1 adjusts the vertical height of the tool holder 4-5, and the slide 4-3 adjusts the horizontal position of the tool holder 4-5, so that the tool is aligned with the machining area; the drive motor 4-4 drives the tool holder 4-5 to rotate, and at the same time, the tool feed is controlled by the linear drive component to complete the machining and dimensional correction of the part. Three-dimensional adjustment ensures accurate tool positioning, stable drive ensures machining quality, and the coordinated operation of all components achieves stable machining and dimensional correction of the quenched part, meeting the core functional requirements of the hydraulic milling machine.

[0033] For example, such as Figure 1 As shown, the clamping wheel 3-6 has an arc-shaped concave structure on its surface, and the inner surface of the transmission sleeve 3-2 has a stepped structure.

[0034] In some examples, the concave arc-shaped structure on the surface of clamping wheel 3-6 can precisely fit with the circular outer surface of shaft parts, forming a wrap-around clamping effect. This increases the contact area between clamping wheel 3-6 and the part, preventing excessive local pressure that could damage the part surface. It also enhances clamping stability and prevents radial slippage during machining. Meanwhile, the stepped structure on the inner surface of transmission sleeve 3-2 can adapt to the ends of shaft parts with different diameters. By fitting the different stepped surfaces with the part ends, it can both axially position the part and restrict its axial movement through the stepped steps. This is particularly suitable for shaft parts with different end diameters, improving the adaptability of transmission sleeve 3-2 to parts of different specifications and ensuring that the coaxiality of the parts meets machining requirements after clamping.

[0035] For example, such as Figure 1 As shown, the inner surfaces of the first slag discharge port 3-4 and the second slag discharge port 3-7 are both inclined structural surfaces.

[0036] In some examples, the inner surfaces of the first slag discharge port 3-4 and the second slag discharge port 3-7 are both inclined structural surfaces, with the inclined direction facing the collection hood 3-8, which can guide the processing waste to slide down quickly by gravity.

[0037] The inclined surface of the first slag discharge port 3-4 allows the waste debris on the surface of the boss 3-3 to quickly converge to the second slag discharge port 3-7, preventing the waste debris from accumulating on the surface of the boss 3-3; the inclined surface of the second slag discharge port 3-7 further accelerates the movement of waste debris into the collection hood 3-8, reducing the residue of waste debris in the slag discharge port.

[0038] For example, such as Figure 1As shown, telescopic covers are provided on both sides of the inner side of the boss 3-3.

[0039] In some examples, telescopic covers are provided on both sides inside the boss 3-3, respectively fitted onto the horizontal linear drive component inside the boss 3-3 and the outside of the movable seat 3-5, and can extend and retract synchronously with the movement of the movable seat 3-5. The telescopic covers can effectively prevent machining waste and cooling wastewater from entering the interior of the boss 3-3, prevent waste from adhering to the surface of the horizontal linear drive component or entering the sliding gap of the movable seat 3-5, prevent the drive component from jamming and wearing, and extend the service life of the components.

[0040] In practical use: Insert both ends of the quenched shaft workpiece into the transmission sleeves 3-2 of the moving frames 3-1 on both sides of the stand 1. The horizontal linear drive pushes the moving frames 3-1 closer, causing the transmission sleeves 3-2 to clamp the workpiece ends, ensuring the workpiece and transmission sleeves 3-2 are coaxial. Activate the horizontal linear drive within the boss 3-3, causing the clamping wheels 3-6 on the moving seat 3-5 to move closer to the middle of the workpiece. The concave, arc-shaped clamping wheels 3-6 fit against the workpiece surface, forming stable support from both sides. The electric drive rotates the transmission sleeve 3-2, causing the workpiece to rotate synchronously. Adjust the machining assembly 4. The vertical linear drive controls the lifting sleeve 4-1 to rise and fall along the moving column 2, while the horizontal linear drive pushes the slide 4-3 to move along the crossbeam 4-2, aligning the tool holder 4-5 with the workpiece to be machined. Activate the drive motor 4-4, causing the tool holder 4-5 to rotate and perform milling and dimensional correction on the workpiece. The waste generated during processing falls into the collection hood 3-8 through the first slag discharge port 3-4 of the boss 3-3 and the second slag discharge port 3-7 of the frame 1. The drainage auger 3-9 then transports and discharges the waste. After processing is completed, all components are reset, the transmission sleeve 3-2 and the clamping wheel 3-6 are released, and the workpiece can be removed. The entire process achieves anti-deformation clamping and precise dimensional correction of the workpiece.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A hydraulic milling machine with dimensional correction capability after quenching, characterized in that, include: A platform (1) and a movable column (2), the movable column (2) being mounted on the platform (1); A clamping and fixing assembly (3) is disposed on the platform (1); Processing component (4), said processing component (4) is disposed on the movable column (2); The clamping and fixing assembly (3) includes a pair of movable frames (3-1), which are connected to both sides of the platform (1) by a horizontal linear drive. A transmission sleeve (3-2) driven by electricity is provided on one side of the movable frame (3-1), and the transmission sleeve (3-2) is located on the same axis. A boss (3-3) is provided on the surface of the platform (1).

2. The hydraulic milling machine with dimensional correction after quenching as described in claim 1, characterized in that, The surface of the boss (3-3) is provided with a first slag discharge port (3-4). Both sides of the boss (3-3) are connected to a pair of movable seats (3-5) by a horizontal linear drive. The surfaces of the movable seats (3-5) are vertically rotatably connected with clamping wheels (3-6).

3. A hydraulic milling machine with dimensional correction after quenching, as described in claim 2, characterized in that, The platform (1) has a second slag discharge port (3-7) on its surface. The first slag discharge port (3-4) is located directly above the second slag discharge port (3-7). The platform (1) has a collection cover (3-8) at its bottom. The collection cover (3-8) is located at the bottom of the second slag discharge port (3-7). The collection cover (3-8) has a drainage auger (3-9) inside it.

4. A hydraulic milling machine with dimensional correction after quenching, as described in claim 1, characterized in that, The processing component (4) includes a lifting sleeve (4-1), which is movably connected to the moving column (2). The lifting sleeve (4-1) and the moving column (2) are connected by a vertical linear drive.

5. A hydraulic milling machine with dimensional correction after quenching, as described in claim 4, characterized in that, A horizontal frame (4-2) is fixedly connected to the surface of the lifting sleeve (4-1). A slide (4-3) is connected to the horizontal frame (4-2) via a horizontal linear drive. A drive motor (4-4) is installed inside the slide (4-3). A blade sleeve (4-5) is provided at the output end of the drive motor (4-4).

6. A hydraulic milling machine with dimensional correction after quenching, as described in claim 2, characterized in that, The clamping wheel (3-6) has an arc-shaped concave structure, and the inner surface of the transmission sleeve (3-2) has a stepped structure.

7. A hydraulic milling machine with dimensional correction after quenching, as described in claim 3, characterized in that, The inner surfaces of the first slag discharge port (3-4) and the second slag discharge port (3-7) are both inclined structural surfaces.

8. A hydraulic milling machine with dimensional correction after quenching, as described in claim 1, characterized in that, Telescopic covers (5) are provided on both sides of the inner side of the boss (3-3).

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