Part surface polishing jig

Abstract

The application discloses a part surface polishing jig, which comprises a base plate, a left supporting strip installed on the left side of the upper surface of the base plate, a right supporting strip installed on the right edge of the upper surface of the base plate, and a plurality of bases installed between the left supporting strip and the right supporting strip. The upper surface of each base is provided with a plurality of installation grooves at intervals along the length direction of the base. The lower part of a limiting block is embedded in the installation grooves. The upper part of the limiting block is used for installing the part. The edges of the front and back sides of the part are downwardly curved arc surfaces. The upper surface of the limiting block is provided with a plurality of upward protruding parts. Each protruding part is provided with a plurality of clamping parts used for cooperating with the part. The polishing mechanism can polish the full surface of the part, especially the downwardly curved arc surfaces of the front and back sides, so that the part is prevented from deviating or even falling off during the polishing process. The polishing efficiency is improved, and the uniformity of the surface treatment of the part is improved.

Description

Technical Field

[0001] This invention relates to the field of polishing technology, and in particular to a polishing fixture for the surface of parts. Background Technology

[0002] With the improvement of industrial production levels, the requirements for the appearance of parts are becoming increasingly stringent. From mobile phone and watch casings in electronic products, decorative parts for car remote controls, to coffee pots and other special-purpose appearance or mechanical parts, polishing is widely required. Mechanical polishing is a processing method that uses polishing tools and abrasive particles or other polishing media to refine the surface of a workpiece, reducing its roughness and achieving a bright, smooth surface. Polished workpieces have a smooth surface that meets their specific application requirements.

[0003] Currently, the efficiency of single handheld polishing in the industry is very low. If the parts are not securely clamped during the polishing process, they may shift or even fall off. It is also easy to cause insufficient polishing at the edges of the parts, which affects the polishing efficiency. Summary of the Invention

[0004] The main objective of this invention is to provide a surface polishing fixture for parts. This fixture can be mass-produced, which facilitates the grinding mechanism to polish the entire surface of the parts, especially the downward curved surfaces on the front and rear sides. It also prevents the parts from shifting or even falling off during the polishing process, thereby improving processing efficiency and the uniformity of the surface treatment of the parts.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a part surface polishing fixture, comprising: a base plate, a left support strip installed on the left side of the upper surface of the base plate, a right support strip installed at the right edge of the upper surface of the base plate, and a plurality of bases installed between the left support strip and the right support strip; each base has a plurality of mounting grooves spaced apart along its length on its upper surface; the lower part of a limiting block is embedded in the mounting groove; the upper part of the limiting block is used to install the part; and the front and rear edges of the part are downwardly curved arc surfaces.

[0006] Each of the bases has a support shaft installed on its left and right end faces. One end of each of the two support shafts is fixedly connected to the base, and a roller is installed on the other end of each. The rollers are correspondingly embedded in the connecting grooves opened on the left or right support bars and roll in cooperation with the inner wall of the connecting grooves. One end of each of the several support shafts installed on the left end face of the base extends axially to the outside of the left support bar and is equipped with a drive wheel. The several drive wheels are connected to a drive mechanism for driving the corresponding base to rotate.

[0007] The upper surface of the limiting block has an upward protrusion. Each protrusion has several locking parts for engaging with the part. A rotatable lever is installed in each limiting block through a pin. One end of the lever has a hook that extends upward from the limiting block and a stop that extends away from the pin. The upper end of the hook, located outside one end of the protrusion, is used to fit into a groove at one end of the part. The lower surface of the stop is connected to the base by a spring under compression.

[0008] The following are further improvements to the above technical solution:

[0009] 1. In the above scheme, the left end of the part is a downward curved arc surface, the right side area of ​​the bottom surface of each mounting groove is a downward sloping surface, the lower surface of the right side of the inclined limiting block is in contact with the sloping surface in the mounting groove, a gap is formed between the lower surface of the left side of the limiting block and the bottom surface of the mounting groove, and the slot is located at the left end of the part.

[0010] 2. In the above scheme, an inclined groove is provided on the inner wall of the left end of the mounting groove to cooperate with the left end of the limiting block. The bottom of the inclined groove is an inclined surface that fits with the left end face of the limiting block. The inner wall of the lower part of the inclined groove overlaps with the lower surface of the left end of the limiting block.

[0011] 3. In the above scheme, the connecting groove is an arc-shaped groove opened on the upper surface of the left support bar and the right support bar.

[0012] 4. In the above scheme, a rack is installed on the upper surface of the substrate and on the left side of the left support bar. The lower surface of the rack is connected to the upper surface of the substrate through at least one set of slide rails and sliders, so that the rack can move in a direction perpendicular to the base. Several drive wheels are drive gears, and each drive gear meshes with the rack located below it.

[0013] 5. In the above scheme, a movable block is installed on the left side surface of the rack, one end of a threaded rod is connected to the movable block, and the other end of the threaded rod passes through a mounting base and is connected to a rotating handle.

[0014] 6. In the above scheme, the mounting base, which is threadedly engaged with the threaded rod, is mounted on the left side surface of the substrate.

[0015] 7. In the above scheme, the rack further includes a body portion having teeth and an outer portion located below the body portion and extending to the left.

[0016] 8. In the above scheme, four sliders are installed at intervals on the lower surface of the outer part of the rack, and two slide rails are installed at intervals on the upper surface of the substrate, with each pair of sliders slidingly engaging with one slide rail.

[0017] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0018] 1. The present invention provides a surface polishing fixture for parts, wherein each base has a support shaft mounted on its left and right end faces. One end of each support shaft is fixedly connected to the base, and a roller is mounted on the other end of each support shaft. The roller is embedded in the connecting groove on the support bar and rolls with the inner wall of the connecting groove. One end of each of the several support shafts mounted on the left end face of the base extends axially to the outside of the left support bar and is mounted with a drive wheel connected to the drive mechanism. This drive wheel is used to drive the corresponding base to rotate. By rotating the base in both directions within a certain angle range, the parts mounted on it are rotated in both directions. This facilitates the polishing mechanism to polish the entire surface of the parts, especially the arc-shaped surfaces that bend downwards on the front and rear sides, avoiding insufficient polishing due to the downward bending of the edges on both sides of the parts, and improving the uniformity of the surface treatment of the parts.

[0019] 2. The polishing fixture for the surface of the part of the present invention further includes a rotatable lever installed in each limiting block by a pin. One end of the lever has a hook portion extending upward from the limiting block and a stop portion extending away from the pin. The upper end of the hook portion located outside the protrusion is used to embed into a groove at one end of the part. The lower surface of the stop portion is connected to the base by a spring in a compressed state. The hook portion that cooperates with the part elastically limits the part in the direction perpendicular to the part. This facilitates the installation of the part and maintains the stability of the limiting force on the part. It prevents the part from shifting or even falling off when subjected to external force or flipped during the polishing process, thereby improving the stability and consistency of the processing.

[0020] 3. The polishing fixture for the surface of the part of the present invention has a left end that is a downwardly curved arc surface. The right side area of ​​the bottom surface of each mounting groove is a downwardly sloping surface. The lower surface of the right side of the inclined limiting block fits into the sloping surface in the mounting groove. A gap is formed between the lower surface of the left side of the limiting block and the bottom surface of the mounting groove. The slot is located at the left end of the part. The downwardly curved left end of the part is raised by the inclined limiting block. While not affecting the polishing operation of other areas of the part, it is convenient to polish the arc surface of the left end of the part from all directions. This improves the processing efficiency and further improves the uniformity of the surface treatment of the part. At the same time, a hook part that cooperates with the slot is provided below the left end of the part to further improve the stability of the positional accuracy of the part when polishing the left end of the part, and ensure the processing effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the part surface polishing fixture of the present invention;

[0022] Figure 2 For the appendix Figure 1 A magnified view of a portion of point A;

[0023] Figure 3 This is a partial structural schematic diagram of the surface polishing fixture for parts according to the present invention;

[0024] Figure 4 This is a partial cross-sectional schematic diagram of the surface polishing fixture for the parts of the present invention;

[0025] Figure 5 This is a partial exploded view of the surface polishing fixture for the parts of this invention;

[0026] Figure 6 This is an enlarged view of the mounting groove in the surface polishing fixture of the parts of the present invention.

[0027] In the above figures: 100, part; 101, slot; 1, base; 2, mounting groove; 201, inclined groove; 202, second inclined groove; 3, limiting block; 4, protrusion; 41, snap-fit ​​part; 5, pin; 6, lever; 61, hook part; 62, stop part; 7, spring; 81, guide groove; 82, strip-shaped clearance groove; 83, arc-shaped groove; 11, base plate; 121, left support bar; 122, right support bar; 123, connecting groove; 13, support shaft; 14, roller; 15, drive wheel; 16, rack; 161, body part; 162, external part; 171, slide rail; 172, slider; 18, threaded rod; 19, mounting base; 20, rotating handle; 21, clearance. Detailed Implementation

[0028] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0029] Example 1: A surface polishing fixture for a part includes: a base plate 11, a left support strip 121 mounted on the left side of the upper surface of the base plate 11, a right support strip 122 mounted on the right edge of the upper surface of the base plate 11, and a plurality of bases 1 mounted between the left support strip 121 and the right support strip 122. Each base 1 has a plurality of mounting grooves 2 spaced apart along its length on its upper surface. The lower part of a limiting block 3 is embedded in the mounting groove 2. The upper part of the limiting block 3 is used to mount the part 100. The front and rear edges of the part 100 are downwardly curved arc surfaces.

[0030] Each of the two bases 1 has a support shaft 13 installed on its left and right end faces. One end of each of the two support shafts 13 is fixedly connected to the base 1, and a roller 14 is installed on the other end of each of them. The roller 14 is correspondingly embedded in the connecting groove 123 opened on the left support bar 121 or the right support bar 122 and rolls with the inner wall of the connecting groove 123. One end of each of the several support shafts 13 installed on the left end face of the base 1 extends axially to the outside of the left support bar 121 and is equipped with a drive wheel 15. The several drive wheels 15 are connected to a drive mechanism for driving the corresponding base 1 to rotate.

[0031] By rotating the base in both directions within a certain angle range, the parts mounted on it are rotated in both directions, which makes it easier for the grinding mechanism to grind and polish the entire surface of the parts, especially the curved surfaces that bend downwards on the front and back sides. This avoids insufficient grinding due to the downward bending of the edges on both sides of the parts and improves the uniformity of the surface treatment of the parts.

[0032] The upper surface of the limiting block 3 has an upward protrusion 4. Each protrusion 4 is provided with a plurality of snap-fit ​​parts 41 for cooperating with the part 100. A rotatable lever 6 is installed in each limiting block 3 through a pin 5. One end of the lever 6 has a hook part 61 extending upward from the limiting block 3 and a stop part 62 extending away from the pin 5. The upper end of the hook part 61 located outside one end of the protrusion 4 is used to be embedded in the slot 101 at one end of the part 100. The lower surface of the stop part 62 is connected to the base 1 through a spring 7 in a compressed state.

[0033] The part is installed on the protrusion of the limiting block, which is similar in shape to the part, so that several locking parts on the protrusion engage with the locking grooves on the bottom of the part, thereby positioning the part in one direction.

[0034] The hook part that cooperates with the part provides elastic restraint in the direction perpendicular to the part. This not only facilitates the installation of the part, but also maintains the stability of the restraining force on the part. This prevents the part from shifting or even falling off when subjected to external forces during polishing or when it is flipped, thus improving the stability and consistency of the processing.

[0035] The left end of the aforementioned part 100 is a downwardly curved arc surface, the right side area of ​​the bottom surface of each mounting groove 2 is a downwardly sloping surface, the lower right surface of the inclined limiting block 3 is in contact with the sloping surface in the mounting groove 2, a gap 21 is formed between the lower left surface of the limiting block 3 and the bottom surface of the mounting groove 2, and the slot 101 is located at the left end of the part 100.

[0036] Because the left end of the part is a downward-curved arc surface, the limiting block is tilted so that its left end is higher than its right end, which makes it easier to grind the arc surface of the left end of the part mounted on the limiting block.

[0037] An inclined groove 201 is provided on the inner wall of the left end of the mounting groove 2 to cooperate with the left end of the limiting block 3. The bottom of the inclined groove 201 is an inclined surface that fits with the left end face of the limiting block 3. The inner wall of the lower part of the inclined groove 201 overlaps and connects with the lower surface of the left end of the limiting block 3.

[0038] The aforementioned connecting groove 123 is an arc-shaped groove formed on the upper surface of the left support bar 121 and the right support bar 122.

[0039] A rack 16 is mounted on the upper surface of the substrate 11 and to the left of the left support bar 121. The lower surface of the rack 16 is connected to the upper surface of the substrate 11 by at least one set of slide rails 171 and a slider 172, so that the rack 16 can move in a direction perpendicular to the base 1. Several drive wheels 15 are drive gears, and each drive gear meshes with the rack 16 located below it.

[0040] A movable block 17 is mounted on the left side surface of the rack 16, one end of a threaded rod 18 is connected to the movable block 17, and the other end of the threaded rod 18 passes through a mounting base 19 and is connected to a rotating handle 20.

[0041] By rotating the handle, the threaded rod is driven to rotate in the forward and reverse directions, thereby driving the movable block to reciprocate in a direction perpendicular to the base. The rack, which is slidably mounted on the base plate, reciprocates along with the movable block, causing the drive gear meshing with the rack to drive the base to deflect in the forward and reverse directions within a certain angle range (5°~45°). This facilitates the grinding mechanism to grind the arc-shaped surfaces on the front and rear edges of the part, ensuring uniform grinding of the entire surface of the part and avoiding the formation of undesirable textures due to uneven grinding, thus improving the efficiency and effect of processing.

[0042] The mounting base 19, which is threadedly engaged with the threaded rod 18, is mounted on the left side surface of the base plate 11.

[0043] The aforementioned rack 16 further includes a body portion 161 having teeth and an outer portion 162 located below the body portion 161 and extending to the left.

[0044] Four sliders 172 are spaced apart on the lower surface of the outer part 162 of the rack 16, and two slide rails 171 are spaced apart on the upper surface of the substrate 11. Each pair of sliders 172 slides into contact with one slide rail 171.

[0045] Example 2: A surface polishing fixture for a part includes: a base plate 11, a left support strip 121 mounted on the left side of the upper surface of the base plate 11, a right support strip 122 mounted on the right edge of the upper surface of the base plate 11, and a plurality of bases 1 mounted between the left support strip 121 and the right support strip 122. Each base 1 has a plurality of mounting grooves 2 spaced apart along its length on its upper surface. The lower part of a limiting block 3 is embedded in the mounting groove 2. The upper part of the limiting block 3 is used to mount the part 100. The front and rear edges of the part 100 are downwardly curved arc surfaces.

[0046] Each of the two bases 1 has a support shaft 13 installed on its left and right end faces. One end of each of the two support shafts 13 is fixedly connected to the base 1, and a roller 14 is installed on the other end of each of them. The roller 14 is correspondingly embedded in the connecting groove 123 opened on the left support bar 121 or the right support bar 122 and rolls with the inner wall of the connecting groove 123. One end of each of the several support shafts 13 installed on the left end face of the base 1 extends axially to the outside of the left support bar 121 and is equipped with a drive wheel 15. The several drive wheels 15 are connected to a drive mechanism for driving the corresponding base 1 to rotate.

[0047] The upper surface of the limiting block 3 has an upward protrusion 4. Each protrusion 4 is provided with a plurality of snap-fit ​​parts 41 for cooperating with the part 100. A rotatable lever 6 is installed in each limiting block 3 through a pin 5. One end of the lever 6 has a hook part 61 extending upward from the limiting block 3 and a stop part 62 extending away from the pin 5. The upper end of the hook part 61 located outside one end of the protrusion 4 is used to be embedded in the slot 101 at one end of the part 100. The lower surface of the stop part 62 is connected to the base 1 through a spring 7 in a compressed state.

[0048] After the part is placed in the appropriate position, the lever with the stop part on the left end tends to rotate upward under the action of the spring in the compressed state. This causes the hook part on the lever to be inserted into the slot on the left end of the part and apply an upward force perpendicular to the part. This achieves multi-directional limiting of the part and ensures that the part does not shift when the grinding mechanism grinds the upper surface of the part, especially the arc surface on its left end, and the arc surfaces on the front and rear sides of the part in the flipped state. Moreover, the greater the pressure applied to the part by the grinding mechanism, the greater the reaction force provided by the spring, making the limiting of the part by the hook part embedded in the slot more stable, thereby improving the efficiency and effect of grinding and polishing the part.

[0049] The left end of the aforementioned part 100 is a downwardly curved arc surface, the right side area of ​​the bottom surface of each mounting groove 2 is a downwardly sloping surface, the lower right surface of the inclined limiting block 3 is in contact with the sloping surface in the mounting groove 2, a gap 21 is formed between the lower left surface of the limiting block 3 and the bottom surface of the mounting groove 2, and the slot 101 is located at the left end of the part 100.

[0050] The inclined limiting block raises the left end of the downward-bending part, facilitating all-round grinding of the curved surface of the left end of the part without affecting the grinding operation of other areas of the part. This improves processing efficiency and further enhances the uniformity of the surface treatment of the part. At the same time, a hook part that cooperates with the slot is set at the bottom of the left end of the part to further improve the stability of the part's positional accuracy when grinding the left end of the part, ensuring the processing effect.

[0051] An inclined groove 201 is provided on the inner wall of the left end of the mounting groove 2 to cooperate with the left end of the limiting block 3. The bottom of the inclined groove 201 is an inclined surface that fits with the left end face of the limiting block 3. The inner wall of the lower part of the inclined groove 201 overlaps and connects with the lower surface of the left end of the limiting block 3.

[0052] A rack 16 is mounted on the upper surface of the substrate 11 and to the left of the left support bar 121. The lower surface of the rack 16 is connected to the upper surface of the substrate 11 by at least one set of slide rails 171 and a slider 172, so that the rack 16 can move in a direction perpendicular to the base 1. Several drive wheels 15 are drive gears, and each drive gear meshes with the rack 16 located below it.

[0053] The aforementioned rack 16 further includes a body portion 161 having teeth and an outer portion 162 located below the body portion 161 and extending to the left.

[0054] The aforementioned pin 5 is positioned near the end of the lever 6 that has a hook portion 61.

[0055] The base 1 has a guide groove 81 for the lower part of the spring 7 to be inserted.

[0056] Both the base 1 and the limiting block 3 are provided with strip-shaped clearance grooves 82 corresponding to the rotatable lever 6.

[0057] The aforementioned strip-shaped clearance groove 82 has an arc-shaped groove 83 on each of the inner walls on both sides of the hook part 61.

[0058] The working principle of this invention is as follows:

[0059] Before polishing, the part is first installed on the protrusion of the limiting block that is similar in shape to the part, so that several locking parts on the protrusion engage with the locking grooves on the bottom of the part to achieve positioning of the part in one direction.

[0060] Because the left end of the part is a downward curved surface, the limiting block is tilted so that its left end is higher than its right end, which makes it easier to grind the curved surface of the left end of the part mounted on the limiting block.

[0061] After the part is placed in the appropriate position, the lever with the stop part on the left end tends to rotate upward under the action of the spring in the compressed state. This causes the hook part on the lever to be inserted into the slot on the left end of the part and apply a force perpendicular to the part upward. This achieves multi-directional limiting of the part and ensures that the part does not shift when the grinding mechanism grinds the upper surface of the part, especially the arc surface on its left end, and the arc surfaces on the front and rear sides of the part in the flipped state. Moreover, the greater the pressure applied to the part by the grinding mechanism, the greater the reaction force provided by the spring, making the limiting of the part by the hook part embedded in the slot more stable, thereby improving the efficiency and effect of grinding and polishing the part.

[0062] The grinding mechanism polishes the upper surface of the part mounted on the limiting block. During the polishing process, the threaded rod is driven to rotate in the forward and reverse directions by rotating the handle, thereby driving the movable block to reciprocate in the direction perpendicular to the base. The rack, which is slidably mounted on the base plate, reciprocates along with the movable block, so that the drive gear meshing with the rack drives the base to deflect in the forward and reverse directions within a certain angle range (5°~45°). This facilitates the grinding mechanism to grind the arc-shaped surfaces at the front and rear edges of the part, ensuring uniform grinding of the entire surface of the part and avoiding the occurrence of undesirable textures due to uneven grinding, thereby improving the efficiency and effect of processing.

[0063] The polishing fixture for the part surface of this invention facilitates the polishing mechanism to polish the entire surface of the part, especially the downward-curving arc surfaces on the front and rear sides, avoiding insufficient polishing due to the downward curvature of the edges on both sides of the part, thus improving the uniformity of the surface treatment. It also facilitates the installation of the part, maintaining the stability of the limiting force on the part at all times, preventing the part from shifting or even falling off when subjected to external forces or flipped during the polishing process, thus improving the stability and consistency of the processing. Furthermore, it improves the stability of the part's positional accuracy when polishing the left end of the part, ensuring the processing effect.

[0064] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A surface polishing fixture for parts, comprising: The substrate (11), a left support strip (121) mounted on the left side of the upper surface of the substrate (11), a right support strip (122) mounted on the right edge of the upper surface of the substrate (11), and a plurality of bases (1) mounted between the left support strip (121) and the right support strip (122) are characterized in that: a plurality of mounting grooves (2) are provided on the upper surface of each base (1) along its length direction, the lower part of a limiting block (3) is embedded in the mounting groove (2), the upper part of the limiting block (3) is used to mount the part (100), and the front and rear edges of the part (100) are downward curved arc surfaces; Each of the bases (1) has a support shaft (13) installed on its left and right end faces. One end of each of the two support shafts (13) is fixedly connected to the base (1), and a roller (14) is installed on the other end of each. The roller (14) is correspondingly embedded in the connecting groove (123) opened on the left support bar (121) or the right support bar (122) and rolls with the inner wall of the connecting groove (123). One end of each of the several support shafts (13) installed on the left end face of the base (1) extends axially to the outside of the left support bar (121) and is equipped with a drive wheel (15). The several drive wheels (15) are connected to a drive mechanism to drive the corresponding base (1) to rotate. The upper surface of the limiting block (3) has an upward protrusion (4), and each protrusion (4) is provided with a plurality of snap-fit ​​parts (41) for cooperating with the part (100). A rotatable lever (6) is installed in each limiting block (3) through a pin (5). One end of the lever (6) has a snap hook (61) extending upward from the limiting block (3) and a stop part (62) extending away from the pin (5). The upper end of the snap hook (61) located outside one end of the protrusion (4) is used to be embedded in the slot (101) at one end of the part (100). The lower surface of the stop part (62) is connected to the base (1) through a spring (7) in a compressed state.

2. The part surface polishing fixture according to claim 1, characterized in that: The left end of the part (100) is a downward curved arc surface, and the right side area of ​​the bottom surface of each mounting groove (2) is a downward inclined slope surface. The lower right surface of the inclined limiting block (3) fits against the slope surface in the mounting groove (2). A gap (21) is formed between the lower left surface of the limiting block (3) and the bottom surface of the mounting groove (2). The slot (101) is located at the left end of the part (100).

3. The part surface polishing fixture according to claim 2, characterized in that: An inclined groove (201) that mates with the left end of the limiting block (3) is provided on the inner wall of the left end of the mounting groove (2). The bottom of the inclined groove (201) is an inclined surface that fits with the left end face of the limiting block (3). The inner wall of the lower part of the inclined groove (201) overlaps with the lower surface of the left end of the limiting block (3).

4. The part surface polishing fixture according to claim 1, characterized in that: The connecting groove (123) is an arc-shaped groove formed on the upper surface of the left support bar (121) and the right support bar (122).

5. The part surface polishing fixture according to claim 1, characterized in that: A rack (16) is mounted on the upper surface of the substrate (11) and to the left of the left support bar (121). The lower surface of the rack (16) is connected to the upper surface of the substrate (11) by at least one set of slide rails (171) and sliders (172), so that the rack (16) can move in a direction perpendicular to the base (1). Several drive wheels (15) are drive gears, and each drive gear is meshed with the rack (16) located below it.

6. The part surface polishing fixture according to claim 5, characterized in that: A movable block (17) is mounted on the left side surface of the rack (16), one end of a threaded rod (18) is connected to the movable block (17), and the other end of the threaded rod (18) passes through a mounting base (19) and is connected to a rotating handle (20).

7. The part surface polishing fixture according to claim 6, characterized in that: The mounting base (19), which is threadedly engaged with the threaded rod (18), is mounted on the left side surface of the base plate (11).

8. The part surface polishing fixture according to claim 5, characterized in that: The rack (16) further includes a body portion (161) having teeth and an outer portion (162) located below the body portion (161) and extending to the left.

9. The part surface polishing fixture according to claim 8, characterized in that: Four sliders (172) are spaced apart on the lower surface of the outer part (162) of the rack (16), and two slide rails (171) are spaced apart on the upper surface of the substrate (11). Each pair of sliders (172) slides into contact with one slide rail (171).

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