Camshaft lathe with automatic tool setting and online measurement functions

Abstract

The utility model relates to the technical field of camshaft machining, in particular to an automatic tool setting and online measuring camshaft lathe which comprises a supporting frame, a workbench is fixedly connected to the top of the supporting frame, and a driving motor is arranged at the outer bottom of the workbench. The output end of the driving motor penetrates through the workbench, extends to the position above the workbench and is connected with a telescopic table. The electric air cylinder is used for pushing the sliding block and the supporting rod to move, the reading head is driven by the connecting line to move along the linear grating ruler, the displacement of the supporting rod can be accurately measured according to the moire fringe principle, and the effect of accurately controlling the position of the tool head is achieved; the control processor calculates parameters of the length radius of the tool and compares the parameters with preset ideal parameters to obtain a deviation value, the electric air cylinder automatically adjusts the tool head to the accurate tool setting position, manual measurement and adjustment are not needed in the whole process, positioning deviation caused by human factors is avoided, and the tool setting time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of camshaft machining technology, and in particular to a camshaft lathe with automatic tool setting and online measurement. Background Technology

[0002] In modern manufacturing, camshafts are core components of key equipment such as engines and automatic transmissions, and their machining accuracy and production efficiency play a decisive role in product performance.

[0003] Before machining a camshaft, tool setting on the lathe is required. However, traditional camshaft lathes mostly rely on manual operation for tool setting. This involves manually measuring the relative position of the tool and workpiece and then manually adjusting the tool post. This method is highly susceptible to human error, making it difficult to guarantee tool setting accuracy and severely restricting the machining efficiency and quality of camshafts. Furthermore, existing camshaft lathes generally lack online measurement capabilities, making it impossible to obtain real-time information on camshaft dimensions and internal defects during machining. Offline inspection is often required after machining. If dimensional deviations or internal defects are found, timely adjustments to the ongoing machining process cannot be made, leading to increased scrap rates and higher production costs. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic tool setting and online measurement camshaft lathe.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A camshaft lathe with automatic tool setting and online measurement includes a support frame, a worktable fixedly connected to the top of the support frame, a drive motor provided at the bottom of the worktable, the output end of the drive motor passing through the worktable and extending to the top of the worktable and connected to a telescopic platform, a positioning hole opened at the top of the telescopic platform, positioning clamps slidably connected around the positioning hole, and a camshaft body inserted into the positioning hole.

[0007] Electric cylinders are symmetrically arranged on both sides of the positioning clamp. Two sliding grooves are symmetrically opened on the outer wall of the worktable. Sliding blocks are slidably connected in both sliding grooves. A support rod is fixedly connected to the top of the sliding block. The outside of the support rod is connected to the output end of the electric cylinder. Linear grating rulers are symmetrically arranged on the outer wall of the worktable. A reading head is slidably connected to the outer surface of the linear grating ruler. One end of the reading head is electrically connected to the support rod through a connecting line.

[0008] Preferably, the outer wall of the workbench is fixedly connected to a mounting bracket, a support block is fixedly connected to one side of the mounting bracket, an electric telescopic rod is provided on the top of the support block, and the output end of the electric telescopic rod passes through the support block and is connected to a positioning pin.

[0009] Preferably, a fixing recess is fixedly connected to the top of the support rod, a connector is fixedly connected to one side of the fixing recess, a connecting bracket is fixedly connected to the outer wall of the connector, and a cutter head is fixedly connected to the side of the connecting bracket near the camshaft body.

[0010] Preferably, a support plate is fixedly connected to one side of the bottom of the fixed recess, a laser displacement sensor is provided on one side of the support plate on the left side of the camshaft body, an ultrasonic flaw detector is provided on one side of the support plate on the right side of the camshaft body, and a data receiving plate is fixedly connected to the bottom of the fixed recess on the right side.

[0011] Preferably, the outer wall of the mounting bracket is provided with two tool setting devices, and the tool setting device is provided with a measuring contact on the side away from the mounting bracket.

[0012] Preferably, a control panel is provided on one side of the top of the workbench, and a control processor is provided inside the control panel.

[0013] The beneficial effects of this utility model are:

[0014] An electric cylinder is used to move a sliding block and a support rod, which in turn moves a reading head along a linear grating ruler via a connecting wire. Utilizing the moiré fringe principle, the displacement of the support rod can be accurately measured, achieving precise control of the tool head position. When the tool head approaches the tool setter, the contact measuring probe triggers a microswitch. The control processor calculates the tool length and radius parameters and compares them with preset ideal parameters to obtain the deviation value. The electric cylinder automatically adjusts the tool head to the accurate tool setting position. The entire process requires no manual measurement or adjustment, avoiding positioning deviations caused by human factors and greatly shortening the tool setting time.

[0015] By using a laser displacement sensor to emit and receive laser beams and simultaneously applying trigonometric functions, the distance to the camshaft surface can be accurately calculated. Measuring the distance between different surfaces on the upper and lower sides of the camshaft is beneficial for obtaining real-time information on the cylindricity and dimensions of the camshaft. By using an ultrasonic flaw detector to emit high-frequency ultrasonic waves into the camshaft, and by analyzing the reflection, refraction, and scattering of the ultrasonic waves when they encounter defects during propagation, the presence of internal defects can be determined. This allows operators to comprehensively and in real-time monitor the machining status of the camshaft, reducing scrap rates and production costs. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of a camshaft lathe with automatic tool setting and online measurement proposed in this utility model;

[0017] Figure 2 This invention relates to an automatic tool setting and online measurement camshaft lathe. Figure 1 A magnified structural diagram of point A in the middle;

[0018] Figure 3 This is a top view of a camshaft lathe with automatic tool setting and online measurement proposed in this utility model.

[0019] Figure 4 This invention relates to an automatic tool setting and online measurement camshaft lathe. Figure 3 A magnified structural diagram of point B in the middle section;

[0020] Figure 5 This is a schematic diagram of the connection structure between the support rod and the camshaft body of an automatic tool setting and online measurement camshaft lathe proposed in this utility model.

[0021] In the picture:

[0022] 1. Support frame; 2. Workbench; 201. Drive motor; 202. Telescopic table; 203. Positioning clamp; 3. Camshaft body; 4. Electric cylinder; 401. Slide groove; 402. Sliding block; 403. Support rod; 5. Linear grating ruler; 501. Reading head; 502. Connecting wire; 6. Mounting bracket; 601. Support block; 602. Electric telescopic rod; 603. Positioning pin; 7. Fixed recess; 701. Connector; 702. Connecting bracket; 703. Tool head; 8. Support plate; 801. Laser displacement sensor; 802. Ultrasonic flaw detector; 803. Data receiving board; 9. Tool setter; 10. Control panel. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0025] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0026] Example 1:

[0027] Reference Figure 1-5 A camshaft lathe with automatic tool setting and online measurement includes a support frame 1. A worktable 2 is fixedly connected to the top of the support frame 1. A drive motor 201 is provided on the bottom of the worktable 2. The output end of the drive motor 201 passes through the worktable 2 and extends to the top of the worktable 2 and is connected to a telescopic table 202. A positioning hole is provided on the top of the telescopic table 202. Positioning clamps 203 are slidably connected around the positioning hole. A camshaft body 3 is inserted into the positioning hole.

[0028] Electric cylinders 4 are symmetrically arranged on both sides of the positioning clamp 203. Two sliding grooves 401 are symmetrically opened on the outer wall of the worktable 2. Sliding blocks 402 are slidably connected in both sliding grooves 401. A support rod 403 is fixedly connected to the top of the sliding block 402. The outside of the support rod 403 is connected to the output end of the electric cylinder 4. A linear grating ruler 5 is symmetrically arranged on the outer wall of the worktable 2. A reading head 501 is slidably connected to the outer surface of the linear grating ruler 5. One end of the reading head 501 is electrically connected to the support rod 403 through a connecting line 502.

[0029] The outer wall of the workbench 2 is fixedly connected to a mounting bracket 6. A support block 601 is fixedly connected to one side of the mounting bracket 6. An electric telescopic rod 602 is provided on the top of the support block 601. The output end of the electric telescopic rod 602 passes through the support block 601 and is connected to a positioning pin 603.

[0030] A fixed recess 7 is fixedly connected to the top of the support rod 403. A connector 701 is fixedly connected to one side of the fixed recess 7. A connecting bracket 702 is fixedly connected to the outer wall of the connector 701. A cutter head 703 is fixedly connected to the side of the connecting bracket 702 near the camshaft body 3.

[0031] Two tool setters 9 are provided on the outer wall of the mounting bracket 6, and a measuring contact is provided on the side of the tool setter 9 away from the mounting bracket 6.

[0032] In this embodiment, when the camshaft body 3 needs to be processed, the bottom of the camshaft body 3 is first inserted into the positioning hole in the telescopic table 202. Then, the sliding positioning clamp 203 clamps the bottom of the camshaft body 3. After that, the electric telescopic rod 602 is activated to drive the positioning pin 603 to descend and press the positioning pin 603 against the top of the camshaft body 3, thereby keeping the camshaft body 3 stable and preventing the camshaft body 3 from shaking during subsequent processing.

[0033] Specifically, after the camshaft body 3 is fixed, the electric cylinder 4 is then activated. When the electric cylinder 4 operates, it pushes the sliding block 402 towards the camshaft body 3. As the sliding block 402 moves, it drives the support rod 403 at its end to move in the opposite direction. When the support rod 403 moves, it drives the reading head 501 along the trajectory of the linear grating ruler 5 via the connecting line 502. Since the reading head 501 contains a photoelectric element, when the light emitted by the photoelectric element passes through the stripes of the linear grating ruler 5 to form moiré fringes, the photoelectric element converts the light signal of the moiré fringes into an electrical signal. The movement of the moiré fringes is proportional to the relative displacement of the linear grating ruler 5 and the reading head 501. By calculating the distance the reading head 501 moves on the linear grating ruler 5, the distance the support rod 403 moves can be accurately determined. This allows for the measurement of the linear displacement distance of the tool head 703 driven by the support rod 403. Simultaneously, based on the displacement information, the position of the support rod 403 can be monitored in real time to realize the tool... The position of the tool head 703 is precisely controlled, and the distance between the tool head 703 and the camshaft body 3 is adjusted. At this time, the tool setter 9 is activated. When the tool head 703 moves and gradually approaches the measuring contact of the tool setter 9, the two come into contact with each other. The measuring contact is squeezed and produces a slight displacement, which triggers the micro switch inside the tool setter 9. The micro switch converts the mechanical displacement signal into an electrical signal and transmits it to the control processor. After receiving the signal, the control processor records the coordinate value in the lathe coordinate system at this time. Since the position of the measuring contact of the tool setter 9 is known, the difference between the coordinate value in the lathe coordinate system and the position of the measuring contact of the tool setter 9 is calculated, and the length and radius of the tool head 703 can be obtained. Then, by comparing the length and radius of the tool head 703 measured by the tool setter 9 with the preset ideal tool parameters, the tool deviation value is calculated. Then, the electric cylinder 4 pushes the support rod 403, the fixed recess 7, and the tool head 703 to move, so that the tool head 703 can reach the accurate tool setting position.

[0034] After the tool head 703 is set, the drive motor 201 is then started. When the drive motor 201 runs, it drives the telescopic table 202 to rotate. When the telescopic table 202 rotates, it drives the camshaft body 3 to rotate. Thus, when the surface of the camshaft body 3 rotates along the tool head 703, the tool head 703 can perform grinding processing on the surface of the camshaft body 3.

[0035] Example 2:

[0036] Reference Figure 5Based on Embodiment 1, a camshaft lathe technical solution with automatic tool setting and online measurement is provided. A support plate 8 is fixedly connected to one side of the bottom of the fixed recess 7. A laser displacement sensor 801 is provided on one side of the support plate 8 on the left side of the camshaft body 3. An ultrasonic flaw detector 802 is provided on one side of the support plate 8 on the right side of the camshaft body 3. A data receiving plate 803 is fixedly connected to the bottom of the fixed recess 7 on the right side.

[0037] A control panel 10 is provided on one side of the top of the workbench 2, and a control processor is provided inside the control panel 10.

[0038] In this embodiment, during the processing of the camshaft body 3, the laser displacement sensor 801 is activated. When the laser displacement sensor 801 is running, it emits a laser beam to the surface of the camshaft body 3. After the laser beam irradiates the camshaft body 3, it is reflected and received by the laser displacement sensor 801. The distance from the laser displacement sensor 801 to the surface of the camshaft body 3 can be calculated by using trigonometric functions to form the angle between the emitted and reflected light. Since the surface shape of the camshaft body 3 is variable, the electric telescopic rod 602 is used to drive the camshaft body 3 to move up and down, and different distance measurements at different positions of the camshaft body 3 can be measured. Thus, the cylindricity and dimensions of the camshaft can be obtained in real time, realizing online measurement of the camshaft body 3.

[0039] When measuring the camshaft body 3, the ultrasonic flaw detector 802 is activated to emit high-frequency ultrasonic waves into the interior of the camshaft body 3. As the high-frequency ultrasonic waves propagate through the material inside the camshaft body 3, when they encounter internal defects (such as cracks, pores, inclusions, etc.), the acoustic properties of the material at the defect location differ from those of the matrix material, causing reflection, refraction, and scattering of the ultrasonic waves. The probe of the ultrasonic flaw detector 802 then receives the reflected ultrasonic signals and converts them into electrical signals, which are received by the data receiving board 803. The signal processing circuit inside the ultrasonic flaw detector 802 amplifies, filters, and analyzes these electrical signals. Based on the characteristics of the signals (such as amplitude, phase, and time delay), it determines whether there are defects inside the camshaft body 3, as well as the location and size of the defects. Subsequently, the data receiving board 803 transmits the online measurement data to the control panel 10, allowing operators to observe the status of the camshaft body 3 in real time and adjust the processing parameters accordingly.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A camshaft lathe with automatic tool setting and online measurement, comprising a support frame (1), characterized in that, The top of the support frame (1) is fixedly connected to a workbench (2). A drive motor (201) is provided on the bottom of the workbench (2). The output end of the drive motor (201) passes through the workbench (2) and extends to the top of the workbench (2) and is connected to a telescopic platform (202). A positioning hole is provided on the top of the telescopic platform (202). A positioning clamp (203) is slidably connected around the positioning hole. A camshaft body (3) is inserted into the positioning hole. Electric cylinders (4) are symmetrically arranged on both sides of the positioning clamp (203). Two sliding grooves (401) are symmetrically opened on the outer wall of the worktable (2). Sliding blocks (402) are slidably connected in both sliding grooves (401). A support rod (403) is fixedly connected to the top of the sliding block (402). The outside of the support rod (403) is connected to the output end of the electric cylinder (4). A linear grating ruler (5) is symmetrically arranged on the outer wall of the worktable (2). A reading head (501) is slidably connected to the outer surface of the linear grating ruler (5). One end of the reading head (501) is electrically connected to the support rod (403) through a connecting line (502).

2. The camshaft lathe with automatic tool setting and online measurement according to claim 1, characterized in that, The outer wall of the workbench (2) is fixedly connected to a mounting bracket (6), and a support block (601) is fixedly connected to one side of the mounting bracket (6). An electric telescopic rod (602) is provided on the top of the support block (601), and the output end of the electric telescopic rod (602) passes through the support block (601) and is connected to a positioning pin (603).

3. The camshaft lathe with automatic tool setting and online measurement according to claim 1, characterized in that, The top of the support rod (403) is fixedly connected to a fixed recess (7), and a connector (701) is fixedly connected to one side of the fixed recess (7). A connecting bracket (702) is fixedly connected to the outer wall of the connector (701), and a cutter head (703) is fixedly connected to the side of the connecting bracket (702) near the camshaft body (3).

4. The camshaft lathe with automatic tool setting and online measurement according to claim 3, characterized in that, A support plate (8) is fixedly connected to one side of the bottom of the fixed recess (7). A laser displacement sensor (801) is provided on one side of the support plate (8) on the left side of the camshaft body (3). An ultrasonic flaw detector (802) is provided on one side of the support plate (8) on the right side of the camshaft body (3). A data receiving plate (803) is fixedly connected to the bottom of the fixed recess (7) on the right side.

5. A camshaft lathe with automatic tool setting and online measurement according to claim 2, characterized in that, Two tool setters (9) are provided on the outer wall of the mounting bracket (6), and a measuring contact is provided on the side of the tool setter (9) away from the mounting bracket (6).

6. A camshaft lathe with automatic tool setting and online measurement according to claim 1, characterized in that, A control panel (10) is provided on one side of the top of the workbench (2), and a control processor is provided inside the control panel (10).

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