Centerless grinding machine for machining automobile parts

Abstract

The invention relates to a centerless grinding machine for machining automobile parts. The centerless grinding machine comprises a base; the two ends of the adjusting shaft are rotatably arranged on the base; one end of the frame body is fixedly arranged on the adjusting shaft in a sleeving manner; the center shaft is parallel to the adjusting shaft, and the two ends of the center shaft are rotatably arranged at the other end of the frame body; the grinding wheel is fixedly arranged on the central shaft in a sleeving manner; the adjusting device is arranged on the base and used for driving the adjusting shaft to rotate; the feeding device is arranged on the base; the first belt pulley is fixedly arranged at one end of the central shaft in a sleeving manner; the first motor is fixedly arranged on the base and located at one end of the adjusting shaft, and an output shaft of the first motor and the adjusting shaft are coaxially arranged; the second belt pulley is fixedly arranged on an output shaft of the first motor in a sleeving manner; and the transmission belt is wound on the first belt pulley and the second belt pulley.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, specifically to a centerless grinder for automotive parts processing. Background Technology

[0002] A centerless grinder is a precision grinding machine for external diameter grinding. The design of this machine tool allows the grinding of automotive parts to be processed without the need for center positioning. Instead, the grinding work is completed by lateral comparison positioning between two grinding rollers. This design makes centerless grinders exhibit excellent performance in precision grinding of the outer diameter, cylinder, or outer surface of automotive parts such as shaft components, especially suitable for mass production and high precision.

[0003] However, despite the excellent performance of centerless grinders in terms of production efficiency and precision, some problems still exist in actual production. In the existing process, the automotive parts to be processed are horizontally moved between two grinding rollers, that is, the automotive parts to be processed move from one end of the two grinding rollers to the other end. The automotive parts to be processed are ground centerlessly while rotating by the two rotating grinding rollers. When one end of the automotive parts to be processed just comes into contact with the two grinding rollers, it may cause circular runout at the other end of the automotive parts to be processed. The longer the automotive parts to be processed, the greater the circular runout, resulting in uneven grinding of the automotive parts. Summary of the Invention

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section above, some embodiments of this application provide a centerless grinding machine for processing automotive parts, including: Base; An adjusting shaft, the two ends of which are rotatably mounted on a base; The frame is fixedly sleeved onto the adjusting shaft at one end; The central shaft is set parallel to the adjustment shaft, and its two ends are rotatably set at the other end of the frame; The grinding wheel is fixedly mounted on the central shaft; An adjustment device, mounted on a base, is used to drive the adjustment shaft to rotate; A feeding device is mounted on a base; The first pulley is fixedly sleeved on one end of the central shaft; The first motor is fixedly mounted on the base and located at one end of the adjusting shaft. The output shaft of the first motor is coaxial with the adjusting shaft. The second pulley is fixedly mounted on the output shaft of the first motor. A transmission belt is wound around the first pulley and the second pulley.

[0006] Specifically, the feeding device includes: A rotating shaft, which is parallel to the central axis and whose two ends are rotatably mounted on the base; A turntable, which is fixedly mounted on a rotating shaft; Several guide wheels are distributed in a ring at equal intervals around the axis of rotation, and the two ends of each guide wheel are rotatably mounted on the turntable; Several trays, each corresponding to a number of guide wheels, with both ends of each tray fixed on the turntable; A drive assembly, which is mounted on the base, is used to drive the rotating shaft to rotate.

[0007] Specifically, the adjusting device includes: The first rotating rod is fixedly sleeved at one end of the adjusting shaft; The driven block is located on one side of the first rotating rod and is rotatably mounted on the base; The driven shaft is rotatably disposed at one end of the first rotating rod; A screw, one end of which is rotatably mounted on a driven block, and the other end of which is movably mounted on a driven shaft; A threaded block, which is fitted onto the screw and engages with the screw thread; A connecting rod, one end of which is rotatably mounted on the other end of the first rotating rod, and the other end of which is rotatably mounted on the threaded block.

[0008] Specifically, the driving component includes: The first gear is fixedly sleeved on one end of the rotating shaft; The second motor is fixedly mounted on the base and located on one side of the first gear; The cam is fixedly mounted on the output shaft of the second motor. The second rotating rod is located above the first gear and the cam, and is rotatably mounted on the base; A roller is rotatably mounted at one end of the second rotating rod and rolls in contact with the surface of the cam. The third rotating rod is slidably sleeved on the rotating shaft, and one end is rotatably connected to the other end of the second rotating rod; An I-shaped guide block is rotatably mounted on one end of the third rotating rod; A rack, one end of which is eccentrically and rotatably mounted on a cam, and the other end of which is slidably mounted on an I-shaped guide block.

[0009] Specifically, the driving component also includes: The guide rod has one end fixedly mounted on the other end of the third rotating rod; The friction wheel is fixedly mounted on the rotating shaft; The contact block is slidably fitted onto the guide rod; The spring is sleeved on the guide rod, and its two ends are fixed to the abutment block and the third rotating rod, respectively.

[0010] Specifically, the feeding device further includes: The bracket is fixedly mounted on the base; A vertical passageway is located in the middle of the support frame; The feeding plate has one end fixedly installed at the top of the vertical channel; The first and second limiting toothed plates are slidably mounted on the feeding plate in the vertical direction. The second gear is rotatably mounted on the feeding plate and simultaneously meshes with the first limiting gear plate and the second limiting gear plate; An electric telescopic rod is fixedly mounted on the feeding plate, and its telescopic end is fixedly connected to the second limiting tooth plate.

[0011] Specifically, the pallet has an inclined surface that faces the guide wheel.

[0012] The beneficial effects of this invention are: When centerlessly grinding automotive parts, the adjusting device first drives the adjusting shaft to rotate, causing the frame to rotate as well. This causes the central shaft and grinding wheel on the frame to rotate together, adjusting the distance between the grinding wheel and the feeding device. After adjustment, the adjusting device fixes the direction of rotation of the adjusting shaft, thus fixing the position of the grinding wheel. Simultaneously, the first motor and feeding device are started. The first motor drives the second pulley to rotate, which in turn drives the transmission belt. The transmission belt causes the first pulley to rotate, which in turn drives the central shaft to rotate, and the grinding wheel on the central shaft rotates. The feeding device is then activated, feeding several automotive parts to be processed sequentially. The rotating grinding wheel performs centerless grinding on these automotive parts sequentially. During the feeding process, the axis of the automotive parts to be processed is kept parallel to the central axis, which is equivalent to line contact between the grinding wheel and the automotive parts. This effectively avoids excessive circular runout of the automotive parts, which could lead to uneven grinding. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0014] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the regulating device; Figure 3 This is a front view of the driving component; Figure 4 This is a side view of the feeding device; Figure 5 for Figure 4 A sectional view of line AA in the diagram; Figure 6 for Figure 5 Enlarged view of point B in the image; Figure 7 for Figure 5 Enlarged view of point C in the image; Figure 8 for Figure 4 A structural cross-sectional view of the BB line in the diagram; Figure 9 for Figure 8 Enlarged view of point A in the image.

[0016] The annotations in the attached figures are explained as follows: 1. Base; 2. Adjusting shaft; 3. Frame; 4. Central shaft; 5. Grinding wheel; 6. Adjusting device; 61. First rotating rod; 62. Driven block; 63. Driven shaft; 64. Screw; 65. Threaded block; 66. Connecting rod; 7. Feeding device; 71. Rotating shaft; 72. Turntable; 73. Guide wheel; 74. Support plate; 741. Inclined surface; 75. Drive assembly; 751. First gear; 752. Second motor; 753. Cam; 754. Second rotating rod; 755. Roller; 756. Third rotating rod; 757. I-shaped guide block; 758. Rack; 759. Guide rod; 760. Friction wheel; 761. Contact block; 762. Spring; 76. Bracket; 77. Vertical channel; 78. Feeding plate; 79. First limiting toothed plate; 710. Second limiting toothed plate; 720. Second gear; 730. Electric telescopic rod; 8. First pulley; 9. First motor; 10. Second pulley; 11. Transmission belt. Detailed Implementation

[0017] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0018] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0019] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0020] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0021] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Reference Figures 1-9 As shown, the centerless grinder for machining automotive parts according to the present invention includes: Base 1; Adjustment shaft 2, both ends of which are rotatably mounted on base 1; The frame 3 has one end fixedly sleeved on the adjusting shaft 2; The central shaft 4 is arranged parallel to the adjusting shaft 2, and its two ends are rotatably set at the other end of the frame 3; Grinding wheel 5 is fixedly mounted on central shaft 4; Adjustment device 6, which is mounted on base 1, is used to drive adjustment shaft 2 to rotate; Feeding device 7 is mounted on base 1; The first pulley 8 is fixedly sleeved on one end of the central shaft 4; The first motor 9 is fixedly mounted on the base 1 and located at one end of the adjusting shaft 2. The output shaft of the first motor 9 is coaxial with the adjusting shaft 2. The second pulley 10 is fixedly sleeved on the output shaft of the first motor 9; A transmission belt 11 is wound around a first pulley 8 and a second pulley 10; When grinding automotive parts without a center, the adjusting device 6 first drives the adjusting shaft 2 to rotate, causing the frame 3 to rotate as well. This causes the central shaft 4 and grinding wheel 5 on the frame 3 to rotate together, adjusting the distance between the grinding wheel 5 and the feeding device 7. After adjustment, the adjusting device 6 fixes the rotation direction of the adjusting shaft 2, thus fixing the position of the grinding wheel 5. Simultaneously, the first motor 9 and the feeding device 7 are started. The first motor 9 drives the second pulley 10 to rotate, which in turn drives the transmission belt 11. The transmission belt 11 causes the first pulley 8 to rotate, which in turn drives the central shaft 4 to rotate, and the grinding wheel 5 on the central shaft 4 to rotate. The feeding device 7 is then activated. The machine operates by sequentially feeding several automotive parts to be processed. The rotating grinding wheel 5 performs centerless grinding on these parts in sequence. During the feeding process, the axis of the automotive parts to be processed is kept parallel to the central axis 4, which is equivalent to the grinding wheel 5 making line contact with the automotive parts. This effectively avoids the problem of uneven grinding caused by excessive circular runout during the centerless grinding process. The output shaft of the first motor 9 is coaxial with the adjusting shaft 2, ensuring that the tension of the transmission belt 11 remains constant when adjusting the rotation angle of the frame 3. The grinding wheel 5 makes direct line contact with the automotive parts to be processed, improving the processing efficiency of the centerless grinding.

[0023] Specifically, the adjusting device 6 includes: The first rotating rod 61 is fixedly sleeved on one end of the adjusting shaft 2; The driven block 62 is located on one side of the first rotating rod 61 and is rotatably mounted on the base 1; Driven shaft 63 is rotatably disposed at one end of first rotating rod 61; The screw 64 has one end rotatably mounted on the driven block 62, and the other end is movably mounted on the driven shaft 63. A threaded block 65 is fitted onto a screw 64 and is threadedly engaged with the screw 64. The connecting rod 66 has one end rotatably mounted on the other end of the first rotating rod 61, and the other end rotatably mounted on the threaded block 65. Rotating the screw 64 changes the position of the threaded block 65. Through the connecting rod 66, the connecting rod 66 drives the other end of the first rotating rod 61 to rotate under force. The driven shaft 63 rotates automatically, and the screw 64 and the driven shaft 63 move automatically. The first rotating rod 61 drives the adjusting shaft 2 to rotate. When the screw 64 is not rotated, the first rotating rod 61 is automatically fixed, that is, the adjusting shaft 2 is automatically fixed. The overall driving of the adjusting shaft 2 is more labor-saving.

[0024] Specifically, the feeding device 7 includes: A rotating shaft 71 is parallel to the central shaft 4 and its two ends are rotatably mounted on the base 1; Turntable 72 is fixedly sleeved on rotating shaft 71; A plurality of guide wheels 73 are distributed in a ring at equal intervals around a rotation axis 71, and the two ends of each guide wheel 73 are rotatably mounted on a turntable 72. Several trays 74 correspond one-to-one with several guide wheels 73, and both ends of each tray 74 are fixedly mounted on the turntable 72. The drive assembly 75, which is disposed on the base 1, is used to drive the rotating shaft 71 to rotate.

[0025] Specifically, the driving component 75 includes: The first gear 751 is fixedly sleeved on one end of the rotating shaft 71; The second motor 752 is fixedly mounted on the base 1 and located on one side of the first gear 751; Cam 753 is fixedly sleeved on the output shaft of second motor 752; The second rotating rod 754 is located above the first gear 751 and the cam 753 and is rotatably mounted on the base 1; Roller 755 is rotatably disposed at one end of the second rotating rod 754 and is rolled in contact with the surface of cam 753; The third rotating rod 756 is slidably sleeved on the rotating shaft 71, and one end is rotatably connected to the other end of the second rotating rod 754; An I-shaped guide block 757 is rotatably mounted on one end of the third rotating rod 756; The rack 758 is eccentrically and rotatably mounted on the cam 753 at one end, and slidably mounted on the I-shaped guide block 757 at the other end.

[0026] Specifically, the drive component 75 further includes: Guide rod 759, one end of which is fixedly mounted on the other end of third rotating rod 756; Friction wheel 760 is fixedly sleeved on rotating shaft 71; The abutment block 761 is slidably sleeved on the guide rod 759; Spring 762 is sleeved on guide rod 759, and its two ends are fixed to abutment block 761 and third rotating rod 756 respectively.

[0027] Specifically, the feeding device 7 further includes: The bracket 76 is fixedly mounted on the base 1; A vertical channel 77 is located in the middle of the bracket 76; The feeding plate 78 is fixed at one end to the upper end of the vertical channel 77; The first limiting toothed plate 79 and the second limiting toothed plate 710 are vertically slidably disposed on the feeding plate 78; The second gear 720 is rotatably mounted on the feeding plate 78 and simultaneously meshes with the first limiting tooth plate 79 and the second limiting tooth plate 710. The electric telescopic rod 730 is fixedly mounted on the feeding plate 78, and its telescopic end is fixedly connected to the second limiting tooth plate 710.

[0028] Specifically, the pallet 74 is provided with an inclined surface 741, which is arranged in the direction of the guide wheel 73.

[0029] The working principle of the feeding device 7 is as follows: Several automotive parts to be processed are arranged in an array on the feeding plate 78. The second limiting toothed plate 710 is driven to descend by the electric telescopic rod 730. The first limiting toothed plate 79 is raised by the second gear 720. After the first limiting toothed plate 79 rises, the automotive parts to be processed at the front end come into contact with the second limiting toothed plate 710. Then, the second limiting toothed plate 710 is driven to rise by the electric telescopic rod 730, causing the first limiting toothed plate 79 to descend and limit the automotive parts to be processed behind it. The second limiting toothed plate 710 rises to make way for the automotive parts to be processed at that position. The parts roll down to the vertical channel 77 by their own weight and fall onto the support plate 74 along the vertical channel 77. The support plate 74 and the guide wheel 73 support the automotive parts to be processed. The above work is repeated to feed several automotive parts to be processed in sequence. The drive assembly 75 drives the turntable 72 to rotate. The turntable 72 rotates intermittently to replace the adjacent guide wheel 73 and support plate 74. When the automotive parts to be processed rotate to the grinding wheel 5, the grinding wheel 5 performs centerless grinding on the automotive parts to be processed. Thus, the above settings can sequentially complete the loading, centerless grinding and unloading of several automotive parts to be processed. The second motor 752 is started, causing the cam 753 to rotate. The roller 755, during its rotation, drives the second rotating rod 754 to rotate. The roller 755 reduces wear between the second rotating rod 754 and the cam 753. The second rotating rod 754 causes the third rotating rod 756 to rotate and move on the rotating shaft 71. The I-shaped guide block 757 on the third rotating rod 756 moves along with it, causing one end of the rack 758 to approach and mesh with the first gear 751, or one end of the rack 758 to move away from the first gear. When cam 751 disengages from the first gear 751, cam 753 still drives rack 758 to move relative to I-shaped guide block 757. Even if rack 758 moves back and forth, when rack 758 meshes with the first gear 751, rack 758 pushes the first gear 751 to rotate. The rotation of the first gear 751 drives the rotating shaft 71 to rotate. When rack 758 disengages from the first gear 751, rack 758 returns to its original position and moves. The above operation is repeated to make the first gear 751 rotate intermittently and the rotating shaft 71 rotate intermittently, resulting in better overall linkage. When the first gear 751 disengages from the rack 758, the automotive part to be processed is just in initial contact with the grinding wheel 5. The grinding wheel 5 performs centerless grinding on the automotive part to be processed. After the automotive part to be processed is subjected to force, it simultaneously drives the turntable 72 to rotate slowly, so that the automotive part to be processed slowly moves closer to the grinding wheel 5. This avoids the amount of grinding on the automotive part to be processed being too large, exceeding the bearing capacity of the grinding wheel 5, and improving the service life of the grinding wheel 5. At the same time, the third rotating rod 756 moves, causing the guide rod 759 and the contact block 761 to move together, so that the contact block moves towards the friction wheel 760, increasing the friction between the contact block 761 and the friction wheel 760. This causes the rotating shaft 71 to rotate slowly, so that the automotive part to be processed at the centerless grinding point can achieve slow feed grinding. In summary, the rotary table 72 rotates at intervals, and several guide wheels 73 and several support plates 74 sequentially support several automotive parts to be processed and rotate them to the grinding wheel 5. The grinding wheel 5 then performs centerless grinding on the automotive parts to be processed sequentially. During the centerless grinding process, the grinding wheel 5 moves the automotive parts to be processed while simultaneously centerlessly grinding them. The friction wheel 760 and the contact block 761 cause the rotary table 72 to rotate slowly, thus allowing the automotive parts to be processed to move slowly and be fed slowly into the grinding process. In other words, the rotary table 72 alternates between fast and slow rotation, achieving a high feeding speed while simultaneously ensuring a slow feed of the automotive parts to be processed. The rotary table 72 always rotates in one direction and rotates relative to the grinding wheel. The specific rotation direction of the grinding wheel 5 is as shown in the attached instruction manual. Figure 5 The grinding wheel 5 rotates clockwise.

[0030] The first motor 9 and the second motor 752 mentioned above were purchased from the market.

[0031] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A centerless grinder for machining automotive parts, characterized in that, include: Base; An adjusting shaft, the two ends of which are rotatably mounted on a base; The frame is fixedly sleeved on the adjusting shaft at one end; The central shaft is set parallel to the adjustment shaft, and its two ends are rotatably set at the other end of the frame; The grinding wheel is fixedly mounted on the central shaft; An adjustment device, mounted on a base, is used to drive the adjustment shaft to rotate; A feeding device is mounted on a base; The first pulley is fixedly sleeved on one end of the central shaft; The first motor is fixedly mounted on the base and located at one end of the adjusting shaft. The output shaft of the first motor is coaxial with the adjusting shaft. The second pulley is fixedly mounted on the output shaft of the first motor. A transmission belt is wound around the first pulley and the second pulley.

2. The centerless grinder for processing automotive parts according to claim 1, characterized in that, The feeding device includes: A rotating shaft, which is parallel to the central axis and whose two ends are rotatably mounted on the base; A turntable, which is fixedly mounted on a rotating shaft; Several guide wheels are distributed in a ring at equal intervals around the axis of rotation, and the two ends of each guide wheel are rotatably mounted on the turntable; Several trays, each corresponding to a number of guide wheels, with both ends of each tray fixed on the turntable; A drive assembly, which is mounted on the base, is used to drive the rotating shaft to rotate.

3. The centerless grinder for processing automotive parts according to claim 1, characterized in that, The regulating device includes: The first rotating rod is fixedly sleeved at one end of the adjusting shaft; The driven block is located on one side of the first rotating rod and is rotatably mounted on the base; The driven shaft is rotatably disposed at one end of the first rotating rod; A screw, one end of which is rotatably mounted on a driven block, and the other end of which is movably mounted on a driven shaft; A threaded block, which is fitted onto the screw and engages with the screw thread; A connecting rod, one end of which is rotatably mounted on the other end of the first rotating rod, and the other end of which is rotatably mounted on the threaded block.

4. A centerless grinder for processing automotive parts according to claim 2, characterized in that, The driving component includes: The first gear is fixedly sleeved on one end of the rotating shaft; The second motor is fixedly mounted on the base and located on one side of the first gear; The cam is fixedly mounted on the output shaft of the second motor. The second rotating rod is located above the first gear and the cam, and is rotatably mounted on the base; A roller is rotatably mounted at one end of the second rotating rod and rolls in contact with the surface of the cam. The third rotating rod is slidably sleeved on the rotating shaft, and one end is rotatably connected to the other end of the second rotating rod; An I-shaped guide block is rotatably mounted at one end of the third rotating rod; A rack, one end of which is eccentrically and rotatably mounted on a cam, and the other end of which is slidably mounted on an I-shaped guide block.

5. A centerless grinder for processing automotive parts according to claim 4, characterized in that, The driving component also includes: The guide rod has one end fixedly mounted on the other end of the third rotating rod; The friction wheel is fixedly mounted on the rotating shaft; The contact block is slidably fitted onto the guide rod; The spring is sleeved on the guide rod, and its two ends are fixed to the abutment block and the third rotating rod, respectively.

6. A centerless grinder for processing automotive parts according to claim 2, characterized in that, The feeding device further includes: The bracket is fixedly mounted on the base; A vertical passageway is positioned in the middle of the support frame; The feeding plate has one end fixedly installed at the top of the vertical channel; The first and second limiting toothed plates are vertically slidably disposed on the feeding plate; The second gear is rotatably mounted on the feeding plate and simultaneously meshes with the first limiting gear plate and the second limiting gear plate; An electric telescopic rod is fixedly mounted on the feeding plate, and its telescopic end is fixedly connected to the second limiting tooth plate.

7. A centerless grinder for processing automotive parts according to claim 2, characterized in that: The pallet has an inclined surface, which is oriented towards the guide wheel.

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