A polishing apparatus

Abstract

The application provides a polishing device, comprising a base, a workpiece clamping mechanism arranged on the base, the workpiece clamping mechanism having a first center and a second center, the second center comprising a main supporting needle and an auxiliary supporting needle arranged side by side, a screw feed mechanism coupled with the workpiece clamping mechanism, a column vertically arranged on the base, a swing arm rotatably arranged around the column and provided with a polishing assembly at the front end, an angle locking member arranged between the swing arm and the column, and a differential head mounted on the swing arm. The polishing device adopts the main needle and the auxiliary needle arranged side by side to form coaxial support, avoids the eccentric slip of the workpiece, the screw feed mechanism is driven by a hand wheel, the angular displacement is converted into axial displacement according to the pitch, and quantitative micro-feeding is realized, the swing arm rotates around the column and is fixed by the angle locking member, and the differential head provides fine adjustment and reproduction of the reference. The clamping, feeding and angle setting are coordinated under the support of the base and the column, and accurate and stable polishing is realized.

Description

Technical Field

[0001] This application relates to the field of precision machining equipment, and more particularly to a polishing apparatus. Background Technology

[0002] In the field of surface polishing of precision plastic and metal parts, existing polishing equipment is mostly benchtop in structure. To ensure that the workpiece is coaxially supported and close to the polishing point during the polishing process, a workpiece clamping mechanism with opposing centers at both ends is generally used, along with a swingable polishing arm to set the polishing angle. To push the workpiece into contact with the polishing head, simple feeding methods such as manual pushing or spring clamping are usually employed. To maintain the predetermined angle during processing, a single hand-tightened knob is often used to lock the swing arm. This combination is widely used for the precision finishing of small metal parts such as pins, needles, and miniature mold cores due to its simple structure.

[0003] In existing equipment in this field, the supports at both ends are typically single conical tips facing each other, the feeding method is mostly manual or spring-loaded, and the angle positioning of the swing arm mainly relies on a single locking point. To adapt to workpieces of different sizes, the tip is often replaced or the stroke is adjusted. To obtain a smaller polishing amount, the operator often relies on manual control of the push. To make the angle close to the set value, the locking parts are often repeatedly tightened and loosened for fine adjustments. Overall, these devices are compact in structure, but lack quantifiable and repeatable constraint chains in terms of clamping, feeding, and angle setting.

[0004] Based on the above usage, the existing technology has the following typical technical problems: First, when processing small, hardened or slippery metal parts, the single-point top is prone to eccentricity or slippage, and the coaxial support stability is insufficient; Second, the lack of lead screw transmission makes the axial feed unquantifiable and has low resolution, making it difficult to stably control micro-polishing; Third, the swing arm angle relies only on single-point locking, resulting in weak angle setting and repeatability, and it is easily drifted by external forces, making it difficult to guarantee the surface and dimensional consistency of the finished product. Utility Model Content

[0005] In view of this, it is necessary to provide a polishing apparatus to solve the above problems.

[0006] This application provides a polishing device, a base, a workpiece clamping mechanism disposed on the base, the workpiece clamping mechanism having a first center and a second center disposed opposite to each other, the second center including a main support pin and an auxiliary support pin disposed side by side, the extension length of the auxiliary support pin being shorter than the extension length of the main support pin; a lead screw feed mechanism connected to the workpiece clamping mechanism, the lead screw feed mechanism including a lead screw and a handwheel; a column, vertically disposed on the base; a swing arm, rotatably disposed around the column, and having a polishing component at its front end; an angle locking member disposed between the swing arm and the column; and a micrometer head mounted on the swing arm.

[0007] In at least one embodiment of this application, the lead screw output end of the lead screw feed mechanism is connected to the first center seat to drive the first center seat to move linearly along the workpiece axis.

[0008] In at least one embodiment of this application, the handwheel is a knurled disc handwheel and is fixedly installed at one end of the lead screw.

[0009] In at least one embodiment of this application, a second tip and an auxiliary support pin are mounted side by side on the end face of the second tip seat, and the second tip and the auxiliary support pin are arranged parallel to each other.

[0010] In at least one embodiment of this application, the second tip is a tapered needle.

[0011] In at least one embodiment of this application, the swing arm is rotatably connected to the column via a pivot plate, the pivot plate is coaxially sleeved on the outer circular surface of the column, and the swing arm body is fixedly connected to the pivot plate.

[0012] In at least one embodiment of this application, an angle locking element is disposed at the periphery of the pivot disk.

[0013] In at least one embodiment of this application, the differential head is vertically mounted on the swing arm via a fixed base, and the measuring rod of the differential head is arranged facing the column.

[0014] In at least one embodiment of this application, the polishing assembly is disposed at the front end of the swing arm and includes a tool holder for mounting the polishing head, the tool holder being a knurled chuck type structure.

[0015] In at least one embodiment of this application, the swing arm body is provided with a pair of symmetrical recessed hole structures near the pivot disk.

[0016] The aforementioned polishing device employs parallel main support pins and auxiliary support pins at the second center, geometrically forming a coaxial support with the main pin fixed at the axis and the auxiliary pin limited, suppressing eccentricity and slippage of small parts. The lead screw feed mechanism is driven by a handwheel, and the angular displacement is directly converted into axial displacement according to the pitch, achieving micro-quantifiable feed. The swing arm can rotate around the column, and its degrees of freedom are restricted at the target angle by an angle locking device set therebetween, maintaining the polishing angle positioning. The differential head is installed on the swing arm, providing quantifiable fine adjustment and reproduction reference before locking. The aforementioned clamping, feed, and angle setting work together under the rigid support of the base and column, thereby solving the problems of easy eccentricity and slippage, non-quantifiable feed, and insufficient angle positioning and repeatability in existing devices. Attached Figure Description

[0017] Figure 1 This is a front view of a polishing apparatus according to the first embodiment of this application.

[0018] Figure 2 This is a top view of a polishing apparatus according to the first embodiment of this application.

[0019] Figure 3 This is a perspective view of a polishing apparatus according to the first embodiment of this application.

[0020] Explanation of main component symbols

[0021] 100. Polishing device; 10. Base; 20. Workpiece clamping mechanism; 21. First center; 22. Second center; 23. First center seat; 24. Second center seat; 25. Auxiliary support pin; 26. Lateral support rod; 30. Lead screw feed mechanism; 31. Lead screw; 32. Handwheel; 40. Column; 50. Overall swing arm; 51. Swing arm body; 52. Pivot plate; 53. Angle locking component; 54. First recess; 55. Second recess; 60. Micrometer head; 61. Fixed seat; 62. Measuring rod; 70. Polishing assembly; 71. Tool clamping seat. Detailed Implementation

[0022] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0023] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0024] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] Please see Figures 1-3 The embodiments of this application provide a polishing device 100, including a base 10, a workpiece clamping mechanism 20, a lead screw feeding mechanism 30, a column 40, a rotatably configured swing arm assembly 50 and a polishing component 70 at its front end, an angle locking member 53 disposed between the swing arm assembly 50 and the column 40, and a micrometer head 60 mounted on the swing arm assembly 50.

[0026] In one specific embodiment, the base 10 serves as the mounting and geometric reference, and the workpiece clamping mechanism 20 is disposed on the base 10 and arranged along the same straight line to form the axial reference of the workpiece. The first tip 21 and the second tip 22 are disposed opposite to each other on the reference line, wherein the second tip 22 has a main support pin and an auxiliary support pin 25 arranged side by side on its end face, and the extension length of the auxiliary support pin 25 is shorter than that of the main support pin.

[0027] It should be noted that, in order to clarify the contact sequence of the main support pin and the auxiliary support pin 25 and to avoid simultaneous contact of the two pins during clamping, this embodiment specifies that the extension length of the auxiliary support pin 25 is shorter than that of the main support pin. In a specific embodiment, the end heights of the two pins are preset on the end face of the second center 22, such that the end extension length of the main support pin is greater than the end extension length of the auxiliary support pin 25, and there is a fixed axial height difference between the two. This height difference is achieved by machining and controlling the end face of the second center 22 with the shims or optional length parts used during assembly. During assembly inspection, a feeler gauge or gauge block with the end face as a reference is used for comparison and confirmation to ensure that the main support pin contacts the workpiece axially first, and the auxiliary support pin 25 contacts the workpiece after the main support pin. This structural design effectively ensures the contact sequence of the two pins during workpiece clamping, avoids simultaneous contact of the two pins, thereby improving clamping accuracy and work efficiency.

[0028] The above approach belongs to the conventional structured implementation path of main positioning and auxiliary constraint in fixture design, that is, the contact sequence of the main and auxiliary pins is defined by the same end face and different axial extensions of the two pins. Therefore, in this embodiment, the extension length of the auxiliary support pin 25 is set to be shorter than that of the main support pin. This is a requirement for the assembly height under the condition that the two pins are installed side by side on the same end face, so as to establish the sequential contact relationship and component division of labor at the structural level.

[0029] In one specific embodiment, a transverse support rod 26 is disposed on the second top seat 24 to strengthen the support of the second top seat 24 in the transverse direction. Specifically, the second top seat 24 is fixed above the base 10, one end of the transverse support rod 26 is fixed to the side wall of the second top seat 24, and the other end is fixed to a corresponding position of the base 10, thereby forming a transversely reinforced connection between the second top seat 24 and the base 10.

[0030] Furthermore, the transverse support rod 26 is arranged in a substantially horizontal direction, and its length spans the gap between the second top seat 24 and the base 10, providing additional horizontal support to the second top seat 24. The transverse support rod 26 is fixed to the side wall of the second top seat 24 by screws or welding, while the other end is fixed to the preset mounting surface of the base 10 in the same manner.

[0031] Furthermore, the lateral support rod 26 itself does not participate in the movement; its function is to limit the lateral position of the second tip seat 24 through a fixed connection, so that the alignment between the second tip 22 and the first tip 21 remains stable.

[0032] In one specific embodiment, the lead screw feed mechanism 30 is connected to the workpiece clamping mechanism 20. The axis of the lead screw 31 is coaxial with the axial reference of the first center 21 and the second center 22. The handwheel 32 is fixed to one end of the lead screw 31. By rotating the handwheel 32, the lead screw 31 and the workpiece clamping mechanism 20 are driven to generate linear micro-feed along the above-mentioned reference line. The column 40 is vertically arranged on the base 10. The swing arm assembly 50 is rotatably arranged around the column 40 to form an angle adjustment pair. The polishing assembly 70 is fixed to the front end of the swing arm body 51 and determines the angle with the workpiece as the swing arm body 51 rotates. The angle locking member 53 is arranged between the swing arm assembly 50 and the column 40. After the swing arm body 51 is adjusted to the target angle, the rotating pair is clamped and held. The micrometer head 60 is installed on the swing arm body 51 for reading and adjusting the micro position of the swing arm body 51 before locking.

[0033] Furthermore, the base 10 provides the workpiece axial reference and angular rotation reference, the workpiece clamping mechanism 20 forms an opposing support on the axial reference, the lead screw feed mechanism 30 converts the operation of the handwheel 32 into a controllable micro-feed along the axial reference under coaxial conditions, the column 40 provides the rotation axis of the swing arm body 51, the swing arm body 51 and the polishing assembly 70 complete the angle setting on the rotation axis and are held by the angle locking member 53, and the micro head 60 provides a readable micro-adjustment reference before locking.

[0034] In one specific embodiment, the base 10 positions and fixes the workpiece clamping mechanism 20 and the column 40, so that the first tip 21 and the second tip 22 are opposite each other on the same straight reference. Then, the handwheel 32 is rotated to push the workpiece clamping mechanism 20 axially through the lead screw 31, so that the first tip 21 approaches the second tip 22. The main support pin first contacts the end face of the workpiece to establish positioning. The auxiliary support pin 25 remains in a non-contact state because the difference in length between it and the main support pin is 0.2 to 1.0 mm. It only passively contacts and forms parallel limit when the workpiece undergoes a displacement sufficient to compensate for the difference in length on the near side of the axial reference during the polishing process. Then, the angle locking member 53 is released, and the swing arm body 51 is swung so that the polishing assembly 70 forms the required angle with the workpiece. The fine correction is completed by the reading of the micrometer head 60 and locked by the angle locking member 53. Finally, the handwheel 32 continues to drive the lead screw 31 to feed a small amount along the axial reference to complete the polishing.

[0035] In one specific embodiment, the axial reference of the workpiece arranged along the same straight line on the base 10 is used as a reference. The first center seat 23 and the second center 22 are coaxially arranged, and the lead screw feed mechanism 30 is arranged on this axial reference, with the axis of its lead screw 31 coinciding with the axes of the first center seat 23 and the second center 22. The front end of the lead screw 31 is threadedly connected to the first center seat 23: the first center seat 23 is provided with an internal threaded hole that matches the lead screw 31. When the lead screw 31 rotates, the rotational motion is converted into linear motion of the first center seat 23 along the axial reference through this threaded pair. To achieve pure linear displacement, the first center seat 23 is limited to having only translational freedom along the axial reference and does not rotate with the lead screw 31 during assembly. This is achieved through the limiting fit between the first center seat 23 and the base 10. Handwheel 32 is fixed to the rear end of lead screw 31. The angular displacement of handwheel 32 is applied to lead screw 31, causing lead screw 31 to rotate around its axis. Since the first center seat 23 is threadedly engaged with lead screw 31 and the first center seat 23 is constrained to not rotate with lead screw 31, the first center seat 23 generates a certain amount of linear displacement along the workpiece axis every time handwheel 32 rotates a certain angle. Thus, the output end of lead screw 31 of lead screw feed mechanism 30 is connected to the first center seat 23 by a threaded pair, and the three are coaxial (lead screw 31—first center seat 23—second center 22), with the first center seat 23 reciprocating only along this axis.

[0036] In one specific embodiment, the handwheel 32 is designed as a knurled disc handwheel, the main purpose of which is to provide good friction, facilitating stable adjustment of the lead screw 31 rotation by the operator during use. The handwheel 32 is fixedly connected to one end of the lead screw 31 through a central hole. Specifically, the central hole of the handwheel 32 is machined with a thread that matches the outer surface of the lead screw 31, and the handwheel 32 is fixedly connected to the end of the lead screw 31 through this threaded structure. This connection method ensures that the handwheel 32 remains stable when the lead screw 31 rotates, and that when the operator rotates the handwheel 32, sufficient rotational power is transmitted to rotate the lead screw 31, thereby driving the first center seat 23 to move linearly along the workpiece axis.

[0037] To ensure that the handwheel 32 does not loosen or fail to rotate smoothly during operation, a locking nut or similar fixing structure is used to secure the handwheel 32 to the lead screw 31. This design not only provides a good operating experience but also effectively guarantees stability during long-term use.

[0038] Furthermore, the knurled design of the handwheel 32 increases the friction on its surface, allowing the operator to grip it more firmly and make precise rotational adjustments. In conjunction with the lead screw feed mechanism 30, it ensures fine adjustment of the workpiece and stable position control.

[0039] In one specific embodiment, the end face of the second center seat 24 is precision machined to ensure that the second center 22 and the auxiliary support pin 25 can be arranged side by side in the same plane. Specifically, the end face of the second center seat 24 has two holes for mounting the second center 22 and the auxiliary support pin 25, respectively. These two holes are precision machined to ensure that the size and position of the holes can precisely control the axial and radial positions of the second center 22 and the auxiliary support pin 25. Specifically, the axes of the second center 22 and the auxiliary support pin 25 are parallel and located on the same end face, ensuring their side-by-side arrangement and axial alignment.

[0040] The second center 22 and the auxiliary support pin 25 are mounted through holes drilled in the second center seat 24. The second center 22 is secured within the holes of the second center seat 24 by fastening screws or clamping devices, while the auxiliary support pin 25 is mounted in another hole of the second center seat 24 in a similar manner. A precise hole-and-base fit ensures that the second center 22 and the auxiliary support pin 25 are arranged parallel to each other on their end faces. To ensure accurate workpiece positioning, the mounting hole depths of the second center 22 and the auxiliary support pin 25 are precisely designed and controlled to ensure a difference in their axial extension lengths, and this difference is quantified as a tolerance requirement during the design process.

[0041] In one specific embodiment, the second tip 22 serves as the main support element, responsible for contacting the workpiece and providing axial positioning. The extension length of the auxiliary support pin 25 is shorter than that of the second tip 22 to ensure that the workpiece is preferentially contacted by the second tip 22 during clamping, providing stable axial positioning, while the auxiliary support pin 25 only provides support when the workpiece undergoes minor displacement.

[0042] The second tip 22 features a tapered design, allowing its tip to precisely contact the workpiece and provide a stable axial positioning reference. The tapered design reduces friction during contact with the workpiece, ensuring stable positioning and maintaining the workpiece's position during clamping.

[0043] The auxiliary support pin 25 features a cylindrical design, providing a larger contact surface to offer support even during minor workpiece displacement. The cylindrical design of the auxiliary support pin 25 ensures stable support upon contact with the workpiece without causing excessive friction or interfering with the positioning function of the second tip 22. The cylindrical shape of the pin allows the auxiliary support pin 25 to provide additional support during workpiece displacement, preventing workpiece shift or skew.

[0044] In one specific embodiment, the swing arm assembly 50 is rotatably connected to the column 40 via a pivot disk 52. Specifically, the outer circular surface of the pivot disk 52 and the outer circular surface of the column 40 are connected by a coaxial fitting structure, forming a precise sleeve relationship. The pivot disk 52 is coaxially sleeved on the outer circular surface of the column 40, ensuring that the swing arm body 51 can rotate freely around the column 40.

[0045] Furthermore, to ensure the coaxial fit between the pivot disk 52 and the column 40, the mating surfaces of the outer cylindrical surface of the column 40 and the inner hole of the pivot disk 52 are precision machined using turning and grinding processes to guarantee their coaxiality and surface flatness. During the machining process, both the outer cylindrical surface of the column 40 and the inner hole of the pivot disk 52 are machined to a high-precision tolerance range, typically ±0.01mm, to ensure that there is no excessive friction or clearance during rotation, thereby providing smooth and precise rotational motion.

[0046] The swing arm body 51 and pivot plate 52 of the swing arm assembly 50 are fixedly connected. Specifically, the swing arm body 51 and pivot plate 52 are connected by bolts or riveting. To ensure the firmness of the fixed connection, high-strength bolts are used in the connection, and the connection points are tightened and checked to ensure they are not loose. At the connection between the swing arm body 51 and pivot plate 52, appropriate locating pins or rivets are used to ensure that the swing arm body 51 does not shift during angle adjustment.

[0047] The rotatable connection between the pivot plate 52 and the column 40, through the aforementioned fit and fixed connection, ensures that the swing arm body 51 can rotate precisely around the column 40. This design, through high-precision machining and a stable connection, avoids instability or deviation of the swing arm rotation due to machining errors or loose connections during use.

[0048] In one specific embodiment, the column 40 is vertically fixed on the base 10, and the column 40 has a cylindrical shape. The pivot disk 52 is an annular piece with a central circular hole, and its central circular hole is coaxially fitted with the outer circular surface of the column 40. During assembly, the central circular hole of the pivot disk 52 is directly fitted onto the outer circular surface of the column 40, so that the pivot disk 52 can rotate around the outer circular center line of the column 40. The swing arm body 51 is installed on the outer edge of the pivot disk 52, and the swing arm body 51 and the pivot disk 52 are fixedly connected by fasteners. After assembly, the two move together as a single piece.

[0049] Furthermore, the base 10 and the column 40 are fixedly connected; the pivot plate 52 and the column 40 are rotatably connected (with an inner hole on the outer circular surface); the swing arm body 51 and the pivot plate 52 are fixedly connected. The central hole of the pivot plate 52 is coaxial with the outer circular surface of the column 40, and the swing arm body 51 is fixed to the outside of the pivot plate 52, so that the movement of the swing arm body 51 is directly determined by the rotation of the pivot plate 52 relative to the column 40.

[0050] Furthermore, when a rotational torque is applied to the swing arm body 51, the swing arm body 51 and the pivot disk 52, as a single unit, rotate relative to the column 40 along the circumferential path determined by the center line of the outer circle of the column 40. Since the pivot disk 52 is fitted onto the outer circle of the column 40 with a central circular hole, the cooperation between the two limits rotation to the only major degree of freedom (rotation around the center line of the outer circle of the column 40), while the swing arm body 51 does not undergo relative displacement relative to the pivot disk 52.

[0051] In one specific embodiment, the angle locking member 53 is located at the periphery of the pivot disk 52. A threaded hole is provided on the outer edge of the pivot disk 52, and the angle locking member 53 is a hand-tight knob structure, with its screw end connected to the pivot disk 52 through the threaded hole. During assembly, the knob head is located outside the pivot disk 52, allowing the operator to directly adjust the tightness of the angle locking member 53 by rotating the knob head.

[0052] Furthermore, the angle locking member 53 is installed radially along the pivot disk 52, with the screw end facing the outer circular surface of the column 40. When the knob is tightened, the screw end of the angle locking member 53 is in tight contact with the outer circular surface of the column 40, thereby restricting the rotational freedom of the pivot disk 52 relative to the column 40; when the knob is loosened, the screw end disengages from the outer circular surface of the column 40, and the pivot disk 52 can rotate freely relative to the column 40.

[0053] Furthermore, the angle locking element 53 allows for selective constraint of the rotational freedom between the pivot disk 52 and the column 40 by manual tightening or loosening by the operator. When the knob is tightened, the pivot disk 52 and the column 40 are locked with no relative rotation; when loosened, the pivot disk 52 can rotate around the outer circle centerline of the column 40, causing the swing arm body 51 fixed thereon to rotate accordingly.

[0054] In one specific embodiment, the micrometer head 60 is vertically mounted on the upper surface of the swing arm body 51 via a fixing base 61. The fixing base 61 is a block structure, with its bottom surface fitting against the upper surface of the swing arm body 51 and being fixedly connected by screws, so that the micrometer head 60 can be stably held above the swing arm body 51.

[0055] Furthermore, the axis of the differential head 60 is perpendicular to the surface of the swing arm body 51 and is arranged in a vertical direction. The measuring rod 62 of the differential head 60 extends from the bottom end and is set towards the column 40, and the movement direction of the measuring rod 62 is consistent with the radial direction of the column 40.

[0056] Furthermore, when the swing arm body 51 rotates around the column 40, the differential head 60 moves together with the swing arm body 51, and the measuring rod 62 approaches the column 40. When the swing arm body 51 rotates to a certain angle, the measuring rod 62 contacts the corresponding position on the outside of the column 40 and generates displacement, thereby forming a quantitative indication of the swing arm angle.

[0057] In one specific embodiment, the polishing assembly 70 is mounted at the front end of the swing arm body 51. The main body of the polishing assembly 70 is fixed to the front end face of the swing arm body 51 by screws, forming a rigid connection between them.

[0058] Furthermore, a tool holder 71 is provided at the front end of the polishing assembly 70 for mounting the polishing head. The tool holder 71 adopts a knurled chuck structure, and its outer surface has knurled texture, which is convenient for the operator to manually tighten or loosen. The tool holder 71 has a clamping mechanism inside, which can retract the jaws by tightening to clamp the shank of the polishing head; when loosening, the jaws open to remove or replace the polishing head.

[0059] Furthermore, the tool holder 71 is located at the foremost end of the swing arm body 51, facing the workpiece clamping mechanism 20, ensuring that the installed polishing head can directly contact the workpiece. In terms of operation, when the operator rotates the knurled outer surface of the tool holder 71, the chuck mechanism performs radial clamping or releasing actions, realizing the replaceable installation of the polishing head.

[0060] In one specific embodiment, the swing arm body 51 has a pair of recessed hole structures near the pivot disk 52, namely a first recessed hole 54 and a second recessed hole 55. The first recessed hole 54 and the second recessed hole 55 are symmetrically distributed on both sides of the center line of the swing arm body 51, and their shapes and sizes are consistent.

[0061] Furthermore, both the first recess 54 and the second recess 55 are directly machined into the material of the swing arm body 51, forming an integral part of the swing arm body 51. In terms of position, the two recesses are symmetrically arranged laterally along the swing arm body 51 and are close to the connecting end of the pivot disk 52, and relatively close to the outer edge of the pivot disk 52.

[0062] Furthermore, the symmetrical concave hole structure does not undergo relative movement during assembly or use, but exists as a local geometric feature of the swing arm body 51 to provide symmetrical weight reduction and positioning in the overall structure.

[0063] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A polishing apparatus, characterized in that, include: Base; A workpiece clamping mechanism is disposed on the base. The workpiece clamping mechanism has a first center and a second center arranged opposite to each other. The second center includes a main support pin and an auxiliary support pin arranged side by side. The extension length of the auxiliary support pin is shorter than the extension length of the main support pin. A lead screw feed mechanism is connected to the workpiece clamping mechanism, and the lead screw feed mechanism includes a lead screw and a handwheel; The column is vertically mounted on the base; The swing arm is rotatably mounted around the column, and its front end is equipped with a polishing component; An angle locking component is disposed between the swing arm and the column; The differential head is mounted on the swing arm.

2. The polishing apparatus according to claim 1, characterized in that, The lead screw output end of the lead screw feed mechanism is connected to the first center seat to drive the first center seat to move linearly along the workpiece axis.

3. The polishing apparatus according to claim 1, characterized in that, The handwheel is a knurled disc handwheel and is fixedly installed at one end of the lead screw.

4. The polishing apparatus according to claim 1, characterized in that, The second center and the auxiliary support pin are mounted side by side on the end face of the second center seat, and the second center and the auxiliary support pin are arranged parallel to each other.

5. A polishing apparatus according to claim 4, characterized in that, The second tip is a conical needle.

6. The polishing apparatus according to claim 1, characterized in that, The swing arm is rotatably connected to the column via a pivot plate, which is coaxially sleeved on the outer circular surface of the column, and the swing arm body is fixedly connected to the pivot plate.

7. A polishing apparatus according to claim 6, characterized in that, Angle locking components are located around the periphery of the pivot plate.

8. A polishing apparatus according to claim 1, characterized in that, The differential probe is vertically mounted on the swing arm via a fixed base, with the probe's measuring rod facing the column.

9. A polishing apparatus according to claim 1, characterized in that, The polishing assembly is located at the front end of the swing arm and includes a tool holder for mounting the polishing head, the tool holder being a knurled chuck type structure.

10. A polishing apparatus according to claim 1, characterized in that, The swing arm body has a pair of symmetrical concave hole structures near the pivot plate.

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