A new energy vehicle steering knuckle boring device and its production process

Abstract

The present application relates to a new energy vehicle steering knuckle boring device and its production process, wherein a machine tool of the device is provided with a processing table located directly below a boring cutter, and the processing table is provided with: a processing seat rotatably mounted on the processing table; a control rod elastically arranged on the processing seat; a plurality of support rods arranged and distributed in a circle with equal spacing around the axis of the control rod, the bottom end of the support rod being hinged to the side wall of the control rod, and a deburring cutter being installed on the top end; an elastic reset member arranged between the support rod and the control rod, for driving the support rod to flip in a direction away from the control rod; a synchronous structure arranged between the top end of the control rod and the bottom end of the cutter seat, and configured to only press down the control rod when the boring cutter cuts, and to drive the control rod to rotate when the boring cutter rotates in the opposite direction to retract. The present application utilizes the separate arrangement of the boring cutter and the deburring cutter to complete the boring operation and deburring operation in one feed and retract, effectively improving the efficiency of the processing line without significantly increasing the improvement cost.

Description

Technical Field

[0001] The present application relates to the technical field of boring processing of automobile parts, and in particular to a new energy vehicle steering knuckle boring device and a production process thereof. Background Art

[0002] As a critical safety component in the steering system of new energy vehicles, the steering knuckles of these vehicles require extremely high precision and strength. Precise boring processes ensure the knuckle's motion accuracy, reduce noise and vibration during steering, and enhance driving comfort. The knuckles consist of a disc, ears, and some also include a rod. The ears include long and short ears, each with a coaxial kingpin hole. During installation, the kingpin hole connects to the axle via the kingpin. Therefore, the kingpin hole requires high precision during machining, requiring drilling, boring, and deburring to meet assembly requirements.

[0003] In related technology, Chinese patent application number CN201410424911.7 proposes specialized equipment for boring steering yoke bearing holes. The equipment comprises two boring head assemblies, a fixture assembly, a main drive system, a boring head mounting base, a bed linear guide, and a servo motor. The fixture assembly secures the bearing holes of the two yokes and is driven by the servo motor for left and right movement. The boring head assembly is mounted on the bed via the boring head mounting base. The fixture assembly reciprocates along the linear guide affixed to the bed, and the main drive system drives the boring head assembly for rotation. Advantages of this equipment include the ability to process two workpieces simultaneously, performing both rough and finish boring, improving processing efficiency and ensuring precision. The equipment is moderately cost-effective, offers excellent product consistency, and boasts a high level of automation and efficiency.

[0004] The aforementioned related technologies have the following drawbacks: Boring a steering knuckle generally requires rough boring, fine boring, and burr removal. Rough boring and fine boring can be achieved by adjusting the boring tool's processing position, while burr removal requires the use of special deburring tools or even dedicated equipment. Furthermore, if a rotary deburring method is used, the workpiece's mounting position must be recalibrated each time the workpiece is transferred to ensure machining accuracy. Although some existing deburring tools can be directly attached to a boring tool, these tools require external power, placing high demands on the existing boring tool's processing. Summary of the Invention

[0005] In order to improve the problem that the existing boring device has high equipment requirements when deburring after boring is completed, the present application provides a new energy vehicle steering knuckle boring device and a production process thereof.

[0006] The first aspect of the present application provides a new energy vehicle steering knuckle boring device that adopts the following technical solution:

[0007] A new energy vehicle steering knuckle boring device includes a machine tool, a fixture, a tool holder and a boring tool. The machine tool is provided with a processing table located directly below the boring tool, and the processing table is provided with:

[0008] A processing seat is rotatably mounted on the processing table, and its rotation axis is coaxially arranged with the rotation axis of the tool holder;

[0009] a control rod elastically arranged on the processing seat;

[0010] A plurality of support rods are provided and are arranged in a circle with equal spacing around the axis of the control rod, the bottom ends of the support rods are hinged to the side walls of the control rod, and the top ends are equipped with deburring bayonets;

[0011] an elastic return member, disposed between the support rod and the control rod, and configured to cause the support rod to flip in a direction away from the control rod; and

[0012] The synchronous structure is provided between the top end of the control rod and the bottom end of the tool holder, and is configured to only press down the control rod when the boring tool is cutting down, and to drive the control rod to rotate when the boring tool is rotating in the opposite direction to retract the tool.

[0013] Furthermore, the same-motion structure includes:

[0014] A plurality of upper tooth protrusions are provided and fixedly connected to the bottom end of the tool holder, wherein the plurality of upper tooth protrusions are distributed in a circumferential array with equal spacing about the axis of the tool holder, and the upper tooth protrusions are arranged along the radial direction of the tool holder, and the upper tooth protrusions are helical teeth, and the angle between the inner bevel surface facing away from the direction of rotation of the boring tool in the reverse rotation and retraction and the bottom end surface of the tool holder is an acute angle;

[0015] There are multiple lower tooth protrusions and they are fixed to the top end of the control rod. The multiple lower tooth protrusions are engaged with the multiple upper tooth protrusions in a one-to-one correspondence. The lower tooth protrusions are helical teeth and the angle between the inner inclined surface facing the direction of rotation of the boring tool in the reverse rotation and retraction and the top end surface of the control rod is an acute angle.

[0016] Furthermore, a permanent magnet is provided between the inner inclined surface of the upper tooth protrusion and the inner inclined surface of the lower tooth protrusion, or two permanent magnets that are magnetically attracted to each other are provided between the two.

[0017] Furthermore, the control rod is provided with a momentum detection mechanism for independently detecting the flipping angles of the plurality of support rods on the control rod, and the detection value of the momentum detection mechanism is used to characterize the concentricity of the boring hole and the flatness of the hole wall on the workpiece to be processed.

[0018] Furthermore, the momentum detection mechanism includes:

[0019] a half gear fixedly connected to one end of the support rod close to the control rod and coaxial with the hinge axis of the support rod on the control rod;

[0020] a rack, slidably disposed on the control rod and arranged along the length direction of the control rod;

[0021] A pressure sensor is provided on the control rod and located at one end of the rack. When the plurality of deburring blades all come into contact with the hole wall of the bored hole on the workpiece to be processed, the rack comes into contact with the pressure sensor.

[0022] Furthermore, the pressure sensor is electrically connected to a detection controller, and the detection controller is configured to generate a real-time fitting curve based on the pressure values detected by the multiple pressure sensors to characterize the real-time flipping fluctuation state of the multiple support rods.

[0023] Furthermore, the rack is made of lightweight material, the control rod has a cavity inside, and the rack and the pressure sensor are both placed in the cavity.

[0024] Furthermore, a plurality of guide rods are vertically fixed to the processing seat, a guide plate is fixed to the peripheral side of the control rod, the guide rods are arranged through the guide plate, and a return spring is sleeved on the outer periphery of the guide rods and located between the guide plate and the processing seat.

[0025] Furthermore, one of the support rods corresponds to one of the guide rods. When the control rod is pushed downward by the tool holder until the boring tool passes through the boring hole of the workpiece to be processed, the support rod is abutted against the corresponding side wall of the top end of the guide rod, and at this time, the deburring tool at the top end of the support rod is aligned with the wall of the hole to be processed of the workpiece to be processed.

[0026] The second aspect of this application provides a new energy vehicle steering knuckle boring production process using the following technical solutions:

[0027] A new energy vehicle steering knuckle boring production process, based on the above-mentioned new energy vehicle steering knuckle boring device, includes the following steps:

[0028] S1. Positioning, fixing the workpiece to be processed on the machine tool by the fixture, and aligning the axis of the processing seat with the axis of the tool holder, the deburring knife contacts the wall of the hole to be processed in the workpiece to be processed;

[0029] S2. Boring: driving the tool holder to rotate and lower the boring tool to bore the workpiece, the tool holder pushing the control rod up and down on the machining seat until the boring tool completely penetrates the boring hole of the workpiece and the deburring tool does not extend beyond the boring hole opening;

[0030] S3. Deburring, driving the tool holder to rotate in the opposite direction and slowly retract the tool, with the help of the same moving structure driving the control rod to drive the multiple support rods to rotate, so that the deburring tool at the top of the support rod follows the tool holder to move up and rotate to deburr the wall of the hole to be processed;

[0031] S4. Detection: Perform real-time detection on the flip angles of the plurality of support rods on the control rod to characterize the concentricity of the boring hole and the flatness of the hole wall on the workpiece to be processed; if it is detected that the flip angle of any of the support rods fluctuates abnormally when the tool holder retracts to a certain height, drive the tool holder to advance the tool by a set distance or maintain it at the height for a certain time and maintain the tool holder in a rotating state before continuing to execute step S3.

[0032] In summary, the beneficial technical effects of this application are:

[0033] 1. When the boring tool needs to be retracted after the boring operation is completed, the tool holder is driven to drive the boring tool to rotate in the opposite direction and retract the tool. At this time, the control rod is lifted up and pressed against the bottom of the tool holder under the deformation force of multiple reset springs. Under the action of the synchronous structure, the tool holder drives the control rod to rotate when it rotates in the opposite direction. When the control rod rotates, it drives the two supporting rods and the deburring tool thereon to rotate synchronously. Because the deburring tool is elastically pressed against the wall of the hole to be processed under the action of the elastic reset member, the deburring tool can achieve a floating deburring effect on the hole to be processed. Therefore, on the basis of ensuring effective deburring after boring, the damage to the wall of the hole to be processed is reduced, thereby ensuring the overall boring quality.

[0034] 2. Because the boring tool and deburring tool are separate components, they do not interfere with each other during boring and deburring operations. There is no need to modify the existing boring tool and tool holder. Boring and deburring can be completed with a single feed and retract, effectively improving processing line efficiency without significantly increasing modification costs. The deburring tool is elastically hinged to the control rod via a support rod, allowing it to directly remove burrs from bores of varying diameters within a small range. Even for bores with a wider range of diameters, simply adjusting the support rod length and correcting the torque of the elastic reset element is sufficient. This provides greater flexibility and saves time when performing continuous boring operations on workpieces.

[0035] 3. When the control rod is driven by the tool holder to rotate and slowly lift up in the boring hole of the workpiece to be processed, the deburring knives on the two support rods are pressed against the hole wall of the boring hole and rotate to scrape off the burrs on the hole wall as the control rod rotates. Once there is a concentricity error in the processed boring hole or there are hardened burrs on the hole wall that cannot be scraped off at one time, the support rod will swing accordingly, thereby changing the flip angle of the support rod on the control rod. For example, when there are some hardened burrs that cannot be scraped off at one time, the protrusion will push the deburring knife closer to the control rod, causing the support rod to flip inward on the control rod, and then the rack engaged with it can be moved down with the help of the half gear. At this time, the pressure of the rack on the pressure sensor below it increases. The pressure value output by the pressure sensor shows a peak after being fitted by the detection controller, indicating that there is an abnormality on the inner wall of the boring hole at that location. That is, the processing quality of the boring hole can be inspected at the same time while the deburring operation is being performed, which can effectively ensure the processing quality of the boring hole and the deburring quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0037] Figure 2 This is a schematic diagram of the overall structure of the embodiment of the present application after the machine tool and fixture are hidden;

[0038] Figure 3 This is a schematic diagram of the overall structure of the blade holder and the control rod when they are connected in an embodiment of the present application;

[0039] Figure 4 is a schematic cross-sectional structural diagram of a deburring mechanism according to an embodiment of the present application;

[0040] Figure 5 yes Figure 4 A partial enlarged schematic diagram of part A.

[0041] Description of reference numerals:

[0042] 1. Machine tool; 11. Fixture;

[0043] 21. Tool holder; 22. Boring tool;

[0044] 31. Processing table; 32. Processing seat; 321. Guide rod; 322. Return spring;

[0045] 4. Control rod; 41. Cavity; 42. Long slot; 43. Guide plate;

[0046] 51. Support rod; 52. Deburring knife; 53. Elastic reset member;

[0047] 61. Upper tooth protrusion; 62. Lower tooth protrusion; 63. Permanent magnet;

[0048] 71. Half gear; 72. Rack; 73. Pressure sensor; 74. Mounting plate;

[0049] 8. Steering knuckle; 81. Hole to be processed. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solution of this application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0051] The embodiment of the present application discloses a new energy vehicle steering knuckle boring device. Figure 1 、 Figure 2 and Figure 3 It includes a machine tool 1, a fixture 11, a tool holder 21 and a boring tool 22. The machine tool 1 has a power component for driving the tool holder 21 to rotate forward and backward and to lift and lower. The specific technology is conventional and will not be repeated here.

[0052] The machine tool 1 is provided with a processing table 31 located directly below the boring cutter 22. The processing table 31 is provided with a deburring structure. The deburring mechanism includes:

[0053] The processing seat 32 is rotatably mounted on the processing table 31 , and its rotation axis is coaxially arranged with the rotation axis of the tool holder 21 . The processing seat 32 is specifically rotatably mounted on the processing table 31 via a high-precision thrust bearing.

[0054] The control rod 4 is vertically arranged and elastically arranged on the processing seat 32. The movable direction of the control rod 4 on the processing seat 32 is arranged along the length direction of the control rod 4. The control rod 4 is coaxially arranged with the tool holder 21.

[0055] There are multiple support rods 51 and they are arranged in a circle with equal spacing around the axis of the control rod 4. The bottom end of the support rod 51 is hinged to the side wall of the control rod 4 and a deburring knife 52 is installed on the top end. In this embodiment, there are two support rods 51.

[0056] The elastic reset member 53 is provided between the support rod 51 and the control rod 4 and is used to drive the support rod 51 to flip away from the control rod 4. In the specific setting, the elastic reset member 53 is set as a torsion spring sleeved on the hinge shaft between the support rod 51 and the control rod 4, and one end of the elastic reset member 53 is fixed to the support rod 51 and the other end is fixed to the control rod 4. When the deburring knife 52 on the support rod 51 abuts the inner wall of the hole 81 to be processed in the steering knuckle 8, the elastic reset member 53 is torsionally deformed.

[0057] The synchronous mechanism, located between the top of the control rod 4 and the bottom of the tool holder 21, is configured to only press down the control rod 4 when the boring cutter 22 is engaged, and to rotate the control rod 4 when the boring cutter 22 is retracted. It should also be noted that when the tool holder 21 is in contact with the top of the control rod 4, the deburring tool 52 is positioned below the boring cutter 22 and does not interfere with the normal rotation of the boring cutter 22.

[0058] Among them, multiple guide rods 321 are vertically fixed on the processing seat 32, and a guide plate 43 is fixed to the lower circumference of the control rod 4. The guide rod 321 is set through the guide plate 43, and a return spring 322 is sleeved on the outer periphery of the guide rod 321 and located between the guide plate 43 and the processing seat 32.

[0059] Thus, when boring a hole in the automobile steering knuckle 8, the steering knuckle 8 is first secured to the machine tool 1 via the fixture 11, and the control rod 4 and support rod 51 are passed through the hole 81 to be machined in the automobile steering knuckle 8. The tool holder 21 is then driven to move the boring tool 22 downward. The tool holder 21 pushes the control rod 4 downward. As the control rod 4 moves up and down on the machining base 32, it maintains a stable downward position through the guidance of the guide plate 43 and the multiple guide rods 321, and the return springs 322 on the guide rods 321 are compressed. The tool holder 21 is then driven to drive the boring tool 22 to rotate forward and slowly lower the tool to bore the hole 81 to be machined in the automobile steering knuckle 8. During this process, thanks to the synchronous structure, the tool holder 21 only pushes the control rod 4 downward as it rotates downward, and the corresponding structures such as the control rod 4 and support rod 51 do not interfere with the normal boring operation of the boring tool 22.

[0060] When the boring operation is completed and the tool needs to be retracted, the tool holder 21 is driven to drive the boring tool 22 to rotate in the opposite direction and retract the tool. At this time, the control rod 4 is lifted up and pressed against the bottom of the tool holder 21 under the deformation force of multiple return springs 322, and under the action of the synchronous structure, the tool holder 21 drives the control rod 4 to rotate when it rotates in the opposite direction. When the control rod 4 rotates, it drives the two support rods 51 and the deburring tool 52 thereon to rotate synchronously. Since the deburring tool 52 is elastically pressed against the wall of the hole to be processed 81 under the action of the elastic return member 53, the deburring tool 52 can achieve a floating deburring effect on the hole to be processed 81, thereby ensuring the effective removal of burrs after boring and reducing the damage to the wall of the hole to be processed 81, thereby ensuring the overall boring quality.

[0061] Furthermore, since the boring tool 22 and the deburring tool 52 are separate components, they do not interfere with each other during boring and deburring operations, eliminating the need to modify the existing boring tool 22 and tool holder 21. Boring and deburring operations can be completed with a single advance and retraction, effectively improving processing line efficiency without significantly increasing modification costs. Simultaneously, the deburring tool 52 is elastically hinged to the control rod 4 via the support rod 51, allowing it to directly deburr holes of varying diameters within a small range. Even for holes with a wider range of diameters, it only requires adjusting the length of the support rod 51 and adjusting the torque of the elastic reset member 53. This provides greater flexibility and saves time when performing continuous boring operations on workpieces.

[0062] Specifically, refer to Figure 3 and Figure 4 , the same action structure includes:

[0063] A plurality of upper teeth 61 are provided and fixedly connected to the bottom end of the tool holder 21. The plurality of upper teeth 61 are distributed in a circular array with equal spacing around the axis of the tool holder 21. The upper teeth 61 are arranged radially along the tool holder 21. The upper teeth 61 are helical teeth, and the angle between the inner bevel of the upper teeth 61, which faces away from the direction of rotation of the boring cutter 22 in the reverse direction of retraction, and the bottom end surface of the tool holder 21 is an acute angle.

[0064] Multiple lower protrusions 62 are provided and fixed to the top of the control rod 4. The multiple lower protrusions 62 are arranged in a one-to-one correspondence with the multiple upper protrusions 61. The lower protrusions 62 are beveled, and the inner bevel facing the direction of rotation of the boring cutter 22 is formed at an acute angle with the top surface of the control rod 4. The outer bevels of the upper and lower protrusions 61 and 62 are smooth, while the inner bevels can be frosted.

[0065] Furthermore, a permanent magnet 63 is positioned between the inner bevel of the upper tooth protrusion 61 and the inner bevel of the lower tooth protrusion 62, or two permanent magnets 63 are positioned between them, each magnetically attracted to the other. In this embodiment, permanent magnets 63 are positioned on the inner bevel of both the upper tooth protrusion 61 and the lower tooth protrusion 62, and the permanent magnets 63 on both sides are magnetically attracted to each other. Furthermore, the permanent magnets 63 are embedded within the inner bevel and do not protrude beyond it, to prevent direct force from being applied to the permanent magnets 63 and causing damage when the blade holder 21 drives the control rod 4 to rotate.

[0066] In this way, when the tool holder 21 drives the boring tool 22 to retract, on the one hand, the control rod 4 is pressed against the bottom end of the tool holder 21 under the elastic force of multiple reset springs 322; on the other hand, when the tool holder 21 retracts and slowly rotates in the opposite direction, the two inner inclined surfaces on the upper tooth protrusion 61 and the corresponding lower tooth protrusion 62 are in contact with each other, and the two permanent magnets 63 magnetically attract the two, so that when the tool holder 21 retracts, the control rod 4 can be stably lifted up with the tool holder 21 and rotated in the opposite direction synchronously, ensuring the stable deburring effect of the deburring tool 52.

[0067] Moreover, since the permanent magnet 63 is arranged on the inner inclined surfaces of the upper tooth protrusion 61 and the lower tooth protrusion 62, when the tool holder 21 drives the boring tool 22 to rotate and cut, only the outer inclined surfaces of the upper tooth protrusion 61 and the lower tooth protrusion 62 are in contact and rubbed, and will not directly contact the permanent magnet 63, thereby ensuring the service life of the permanent magnet 63.

[0068] Furthermore, in another feasible embodiment, the boring quality is inspected to improve the processing efficiency and processing quality.

[0069] A momentum detection mechanism is also provided on the control rod 4 for independently detecting the flipping angles of the multiple support rods 51 on the control rod 4. The detection value of the momentum detection mechanism is used to characterize the concentricity of the boring hole on the workpiece to be processed and the flatness of the hole wall.

[0070] In one embodiment, the momentum detection mechanism is configured as an angle sensor installed on the control rod 4, which can directly detect the flipping angle of the support rod 51 on the control rod 4. By judging the change in the angle value detected by the angle sensor, the concentricity of the bored hole and the flatness of the hole wall processed on the steering knuckle 8 can be intuitively analyzed.

[0071] In another embodiment, reference Figure 4 and Figure 5 , the momentum detection mechanism includes;

[0072] The half gear 71 is fixed to one end of the support rod 51 close to the control rod 4 and is coaxial with the hinge axis of the support rod 51 on the control rod 4;

[0073] The rack 72 is slidably mounted on the control rod 4 and is arranged along the length direction of the control rod 4;

[0074] The pressure sensor 73 is provided on the control rod 4 and is located at one end of the rack 72. When multiple deburring knives 52 all come into conflict with the hole wall of the bored hole on the workpiece to be processed, the rack 72 comes into conflict with the pressure sensor 73. In the specific setting, the pressure sensor 73 is provided at the lower end of the rack 72, and one pressure sensor 73 is provided corresponding to one rack 72, so that the two are in a mutual detection relationship, thereby improving the accuracy of the detection results.

[0075] The multiple pressure sensors 73 are electrically connected to a detection controller, which is configured to generate a real-time fitting curve based on the pressure values detected by the multiple pressure sensors 73 to characterize the real-time flipping fluctuation state of the multiple support rods 51 .

[0076] Therefore, when the boring operation is completed, the control rod 4 rotates and slowly lifts up in the boring hole of the steering knuckle 8 driven by the tool holder 21, and the deburring knives 52 on the two support rods 51 are pressed against the hole wall of the boring hole, and follow the rotation of the control rod 4 to rotate and scrape off the burrs on the hole wall of the boring hole. Once there is a concentricity error in the boring hole processed on the steering knuckle 8 or there are hardened burrs on the hole wall that cannot be scraped off at one time, the support rod 51 will swing accordingly, so that the flip angle of the support rod 51 on the control rod 4 changes. Specifically, for example, when there are some hardened burrs that cannot be scraped off at one time, the protrusion will push the deburring knife 52 closer to the control rod 4, causing the support rod 51 to flip inward on the control rod 4, and then the rack 72 engaged with it can be moved down with the help of the half gear 71. At this time, the rack 72 increases the pressure of the pressure sensor 73 below it. The pressure value output by the pressure sensor 73 shows a peak after being fitted by the detection controller, indicating that there is an abnormality on the inner wall of the boring hole at this location. That is, the processing quality of the boring hole can be inspected at the same time while the deburring operation is being performed, which can effectively ensure the processing quality of the boring hole and the deburring quality.

[0077] In order to deal with this abnormality, the detection controller can be further connected to the central control system of the machine tool 1. Once the detection controller identifies that there is an abnormal fluctuation in the pressure value detected by any pressure sensor 73, the central control system of the machine tool 1 can be used to control the tool holder 21 to continue rotating but stop retracting the tool. If, after a certain period of time, the detection data of the pressure sensor 73 is still abnormal, the machine will be shut down to remind the operator to intervene; if, after a certain period of time, the detection data of the two pressure sensors 73 are no longer abnormal, the tool holder 21 will be controlled by the central control system of the machine tool 1 to continue rotating and keep retracting the tool slowly; if, after a certain period of time, the detection data of one pressure sensor 73 is abnormal and the detection data of the other pressure sensor 73 is normal, the machine will also be shut down, and the operator will inspect and repair the pressure sensor 73 and the elastic reset part 53.

[0078] In order to avoid the influence of the weight of the rack 72 and the cutting fluid during the processing on the accuracy of the test results, refer to Figure 4 and Figure 5 The rack 72 is made of lightweight material, such as engineering plastic, and the control rod 4 has a cavity 41 inside, and the rack 72 and the pressure sensor 73 are both placed in the cavity 41.

[0079] At the same time, in order to avoid damage to the pressure sensor 73 caused by excessive downward movement of the rack 72 when the support rod 51 flips over at too large an angle, the pressure sensor 73 can be installed on the mounting plate 74, and the mounting plate 74 is elastically installed in the inner cavity of the support rod 51. The two mounting plates 74 are independent of each other and do not interfere with each other, which can effectively improve this hidden danger.

[0080] In addition, considering that the boring tool 22 needs to penetrate the hole to be processed 81 when boring the automobile steering knuckle 8, and the deburring tool 52 is located below the boring tool 22, the deburring tool 52 cannot be retracted into the hole to be processed 81 after following the control rod 4 to move down and out of the hole to be processed 81, which affects the continuity of the boring operation and the deburring operation.

[0081] For this purpose, refer to Figure 3 and Figure 4 , and is further configured as follows: one support rod 51 corresponds to one guide rod 321. When the control rod 4 moves downward under the push of the tool holder 21 until the boring tool 22 passes through the boring hole of the workpiece to be processed, the support rod 51 abuts against the top side wall of the corresponding guide rod 321, and at this time, the deburring tool 52 at the top of the support rod 51 is aligned with the wall of the hole 81 to be processed of the workpiece to be processed.

[0082] That is, after the tool holder 21 has completely penetrated the hole 81 to be processed, the control rod 4 also moves down to the corresponding position. At this time, the two support rods 51 on the control rod 4 are respectively against the corresponding guide rods 321, so that the support rod 51 can no longer expand outward, but is pushed inward by the guide rods 321 as the control rod 4 continues to move down; when the control rod 4 is lifted up following the withdrawal of the tool holder 21, due to the limiting effect of the guide rods 321, the burr removal knife 52 on the support rod 51 can always remain in a state where it can be extended into the hole 81 to be processed. Once the burr removal knife 52 enters the hole 81 to be processed, the guide rod 321 loses its limiting effect on the support rod 51, and the support rod 51 drives the burr removal knife 52 to elastically press against the wall of the hole 81 to be processed under the action of the elastic reset member 53, so that the boring operation and the deburring operation can be connected continuously and automatically without the intervention of the operator.

[0083] The embodiment of the present application discloses a new energy vehicle steering knuckle boring production process, based on the above-mentioned new energy vehicle steering knuckle boring device, referring to Figure 1 、 Figure 2 and Figure 3 , which includes the following steps:

[0084] S1 positioning, the workpiece to be processed is fixed to the machine tool 1 by the fixture 11, and the axis of the machining seat 32 is aligned with the axis of the tool holder 21, the deburring knife 52 is in contact with the wall of the hole 81 to be machined in the workpiece to be machined;

[0085] S2. Boring: The tool holder 21 drives the boring cutter 22 to rotate and cut, so as to bore the workpiece. The tool holder 21 pushes the control rod 4 up and down on the processing seat 32 until the boring cutter 22 completely penetrates the boring hole of the workpiece to be processed and the deburring cutter 52 does not extend out of the boring hole opening range.

[0086] S3 deburring, driving the tool holder 21 to rotate in the opposite direction and slowly retract the tool, with the help of the same moving structure driving the control rod 4 drives multiple support rods 51 to rotate, so that the deburring knife 52 at the top of the support rod 51 follows the tool holder 21 moves up and rotates to be processed hole 81 wall deburring operation;

[0087] S4. Detection: Perform real-time detection on the flip angles of multiple support rods 51 on the control rod 4 to characterize the concentricity of the boring hole and the flatness of the hole wall on the workpiece to be processed; if it is detected that there is an abnormal fluctuation in the flip angle of any support rod 51 when the tool holder 21 retracts to a certain height, drive the tool holder 21 to advance the tool by a set distance or maintain it at this height for a certain time and maintain the rotation state of the tool holder 21 before continuing to execute step S3.

[0088] The implementation principle of a new energy vehicle steering knuckle boring device in the embodiment of the present application is as follows:

[0089] When the boring operation is completed and the tool needs to be retracted, the tool holder 21 is driven to drive the boring tool 22 to rotate in the opposite direction and retract the tool. At this time, the control rod 4 is lifted up and pressed against the bottom of the tool holder 21 under the deformation force of multiple return springs 322, and under the action of the synchronous structure, the tool holder 21 drives the control rod 4 to rotate when it rotates in the opposite direction. When the control rod 4 rotates, it drives the two support rods 51 and the deburring tool 52 thereon to rotate synchronously. Since the deburring tool 52 is elastically pressed against the wall of the hole to be processed 81 under the action of the elastic return member 53, the deburring tool 52 can achieve a floating deburring effect on the hole to be processed 81, thereby reducing the damage to the wall of the hole to be processed 81 on the basis of ensuring effective deburring after boring, thereby ensuring the overall boring quality.

[0090] Furthermore, since the boring tool 22 and the deburring tool 52 are separate components, they do not interfere with each other during boring and deburring operations, eliminating the need to modify the existing boring tool 22 and tool holder 21. Boring and deburring operations can be completed with a single advance and retraction, effectively improving processing line efficiency without significantly increasing modification costs. Simultaneously, the deburring tool 52 is elastically hinged to the control rod 4 via the support rod 51, allowing it to directly deburr holes of varying diameters within a small range. Even for holes with a wider range of diameters, it is only necessary to adjust the length of the support rod 51 and calibrate the torque of the elastic reset member 53. This provides greater flexibility and saves time when performing continuous boring operations on workpieces.

[0091] When the control rod 4 is driven by the tool holder 21 to rotate and slowly lift up in the boring hole of the workpiece to be processed, the deburring knives 52 on the two support rods 51 are pressed against the wall of the boring hole and follow the rotation of the control rod 4 to rotate and scrape off the burrs on the wall of the boring hole. Once there is a concentricity error in the processed boring hole or there are hardened burrs on the wall of the boring hole that cannot be scraped off at one time, the support rod 51 will swing accordingly, so that the flip angle of the support rod 51 on the control rod 4 changes. For example, when there are some hardened burrs that cannot be scraped off at one time, the protrusion will push the deburring knife 52 closer to the control rod 4, causing the support rod 51 to flip inward on the control rod 4, and then the rack 72 engaged with it can be moved down with the help of the half gear 71. At this time, the rack 72 increases the pressure of the pressure sensor 73 below it. The pressure value output by the pressure sensor 73 shows a peak after being fitted by the detection controller, indicating that there is an abnormality on the inner wall of the boring hole at this location. That is, the processing quality of the boring hole can be inspected at the same time while the deburring operation is being performed, which can effectively ensure the processing quality of the boring hole and the deburring quality.

[0092] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0093] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A new energy vehicle steering knuckle boring device, comprising a machine tool (1), a fixture (11), a tool holder (21) and a boring tool (22), characterized in that: The machine tool (1) is provided with a processing table (31) located directly below the boring tool (22), and the processing table (31) is provided with: A processing seat (32) is rotatably mounted on the processing table (31), and its rotation axis is coaxially arranged with the rotation axis of the tool seat (21); A control rod (4) elastically arranged on the processing seat (32); A plurality of support rods (51) are provided and are arranged in a circular array with equal spacing around the axis of the control rod (4); the bottom end of the support rod (51) is hinged to the side wall of the control rod (4), and a deburring knife (52) is installed on the top end; an elastic reset member (53), disposed between the support rod (51) and the control rod (4), and configured to drive the support rod (51) to flip in a direction away from the control rod (4); and A synchronous structure is provided between the top end of the control rod (4) and the bottom end of the tool holder (21), and is configured to only press down the control rod (4) when the boring tool (22) cuts downward, and to drive the control rod (4) to rotate when the boring tool (22) rotates in the reverse direction to retract the tool; The same action structure includes: A plurality of upper tooth protrusions (61) are provided and fixed to the bottom end of the tool holder (21), the plurality of upper tooth protrusions (61) are distributed in a circular array with equal spacing around the axis of the tool holder (21), the upper tooth protrusions (61) are arranged radially along the tool holder (21), the upper tooth protrusions (61) are helical teeth, and the angle between the inner bevel of the upper tooth protrusions (61) facing away from the direction of rotation of the boring tool (22) in the reverse direction and the bottom end face of the tool holder (21) is an acute angle; The lower tooth protrusions (62) are provided in plurality and fixed to the top end of the control rod (4). The plurality of lower tooth protrusions (62) are engaged with the plurality of upper tooth protrusions (61) in a one-to-one correspondence. The lower tooth protrusions (62) are helical teeth and the angle between the inner bevel facing the direction of rotation of the boring tool (22) in the reverse rotation and retraction and the top end surface of the control rod (4) is an acute angle.

2. A new energy vehicle steering knuckle boring device according to claim 1, characterized in that: A permanent magnet (63) is provided between the inner inclined surface of the upper tooth protrusion (61) and the inner inclined surface of the lower tooth protrusion (62), or two permanent magnets (63) that are magnetically attracted to each other are provided between the two.

3. A new energy vehicle steering knuckle boring device according to any one of claims 1-2, characterized in that: The control rod (4) is provided with a momentum detection mechanism for independently detecting the flipping angles of the plurality of support rods (51) on the control rod (4); the detection value of the momentum detection mechanism is used to characterize the concentricity and hole wall flatness of the boring hole on the workpiece to be processed.

4. A new energy vehicle steering knuckle boring device according to claim 3, characterized in that: The momentum detection mechanism includes: A half gear (71) is fixed to one end of the support rod (51) close to the control rod (4) and is coaxial with the hinge axis of the support rod (51) on the control rod (4); a rack (72) slidably disposed on the control rod (4) and arranged along the length direction of the control rod (4); A pressure sensor (73) is provided on the control rod (4) and is located at one end of the rack (72). When the plurality of deburring knives (52) all come into contact with the wall of the bored hole on the workpiece to be processed, the rack (72) comes into contact with the pressure sensor (73).

5. The new energy vehicle steering knuckle boring device according to claim 4, characterized in that: The pressure sensor (73) is electrically connected to a detection controller, and the detection controller is configured to generate a real-time fitting curve based on the pressure values detected by the multiple pressure sensors (73) to characterize the real-time flipping fluctuation state of the multiple support rods (51).

6. The new energy vehicle steering knuckle boring device according to claim 4, characterized in that: The rack (72) is made of a lightweight material. The control rod (4) has a cavity (41) inside. The rack (72) and the pressure sensor (73) are both placed in the cavity (41).

7. The new energy vehicle steering knuckle boring device according to claim 1, characterized in that: A plurality of guide rods (321) are vertically fixed to the processing seat (32), a guide plate (43) is fixed to the peripheral side of the control rod (4), the guide rods (321) are arranged to pass through the guide plate (43), and a return spring (322) is sleeved on the outer periphery of the guide rods (321) and is located between the guide plate (43) and the processing seat (32).

8. The new energy vehicle steering knuckle boring device according to claim 7, characterized in that: One of the support rods (51) corresponds to one of the guide rods (321). When the control rod (4) is pushed downward by the tool holder (21) until the boring tool (22) passes through the boring hole of the workpiece to be processed, the support rod (51) abuts against the top side wall of the corresponding guide rod (321), and at this time, the deburring tool (52) at the top of the support rod (51) is aligned with the hole wall of the hole to be processed (81) of the workpiece to be processed.

9. A new energy vehicle steering knuckle boring production process, based on a new energy vehicle steering knuckle boring device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Positioning, fixing the workpiece to be processed on the machine tool (1) by the fixture (11), aligning the axis of the processing seat (32) with the axis of the tool seat (21), and the deburring tool (52) contacts the wall of the hole to be processed (81) of the workpiece to be processed; S2. Boring, driving the tool holder (21) to drive the boring tool (22) to rotate and cut, so as to perform a boring operation on the workpiece to be processed, and the tool holder (21) pushes the control rod (4) to move up and down on the processing seat (32) until the boring tool (22) completely penetrates the boring hole of the workpiece to be processed and the deburring tool (52) does not extend outward to escape from the boring hole opening range; S3. Deburring, driving the tool holder (21) to rotate in the opposite direction and slowly retract the tool, and using the synchronous structure to drive the control rod (4) to drive the plurality of support rods (51) to rotate, so that the deburring tool (52) at the top of the support rod (51) moves up and rotates following the tool holder (21) to perform deburring on the wall of the hole to be processed (81); S4. Detection: Real-time detection of the flip angles of the plurality of support rods (51) on the control rod (4) is performed to characterize the concentricity of the boring hole and the flatness of the hole wall on the workpiece to be processed; if it is detected that the flip angle of any of the support rods (51) fluctuates abnormally when the tool holder (21) is retracted to a certain height, the tool holder (21) is driven to advance the tool by a set distance or to remain at the height for a certain time and the tool holder (21) is maintained in a rotating state before continuing to execute step S3.

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