Ultra-smooth surface polishing device for bushing type fastener

Abstract

The utility model discloses a kind of ultra-smooth surface polishing devices for shaft sleeve fastener, belong to fastener processing field.The ultra-smooth surface polishing device includes: setting workbench on rack, the rear side of workbench is set support table;Guide plate is located directly above the workbench;Polishing assembly is located in the side of guide plate;Guiding and pressing assembly is located in the other side of guide plate;Shaft sleeve after electroplating is sleeved on guide plate, guiding and pressing assembly is pressed in polishing assembly on shaft sleeve, and polishing assembly is polished to the outside of shaft sleeve.The purpose is to develop an innovative shaft sleeve fastener ultra-smooth surface processing technology, through technical innovation and process optimization, realize that the roughness of shaft sleeve surface electroplating layer reaches 0.5 below, improve processing efficiency, reduce production cost, enhance the market competitiveness of product.Realize the high-precision, high-efficiency processing of shaft sleeve surface, meet the quality requirement of ultra-smooth surface.

Description

Technical Field

[0001] This utility model relates to the field of fastener processing, and in particular to an ultra-smooth surface polishing device for bushing-type fasteners. Background Technology

[0002] Currently, after cold heading bushings are electroplated (zinc-plated, iron-plated, or other metal-plated), the surface roughness of the product deteriorates due to the characteristics of the electroplating process. During automated assembly at the client's site, there are instances of improper mold insertion and jamming, leading to frequent machine shutdowns for troubleshooting, low assembly efficiency, and numerous customer complaints.

[0003] Improving the processes in the electroplating plant would be very difficult and costly, and the control of the electroplating process could not be 100% qualified. Furthermore, the improved quality stability would not meet the current high-precision assembly requirements.

[0004] Therefore, the goal of this study is to develop a post-electroplating polishing process that can improve the surface roughness of the product to an ultra-high level without damaging the electroplated layer, which is an urgent problem to be solved. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an ultra-smooth surface polishing device for bushing-type fasteners.

[0006] The technical solution of this utility model is: an ultra-smooth surface polishing device for bushing-type fasteners, comprising:

[0007] A frame, on which a worktable is mounted, and a support platform is mounted on the rear side of the worktable;

[0008] A guide plate is mounted on a support platform and is located directly above the worktable;

[0009] A polishing assembly located on one side of the guide plate;

[0010] A guide clamping assembly located on the other side of the guide plate;

[0011] After electroplating, the bushing is fitted onto the guide plate, and the guide clamping assembly presses the bushing onto the polishing assembly, which polishes the outer side of the bushing.

[0012] The polishing assembly includes: a polishing spindle mounted on a support platform, the polishing spindle being parallel to the surface of the worktable, a polishing wheel mounted on the polishing spindle, and a polishing motor connected to the polishing spindle.

[0013] Furthermore, a protective cover is provided on the outside of the polishing wheel. The protective cover can collect the grinding powder during the grinding process and prevent it from spreading in the space.

[0014] Furthermore, an extension plate is provided on the lower side of the protective cover, extending to a collection hole on the frame, and a collection chamber is correspondingly provided below the collection hole. By collecting the ground powder, pollution of the operating space is avoided, and waste metal is also collected, preventing waste.

[0015] Furthermore, the guide clamping assembly includes: a guide shaft, on which a guide wheel is rotatably mounted; the guide shaft is also connected to a linear clamping unit, the driving direction of which is towards the polishing wheel. This achieves the driving of the guide wheel and the clamping of the bushing onto the polishing wheel for polishing; the linear clamping unit is hidden inside the frame.

[0016] Furthermore, the linear pressing unit is equipped with a foot switch, which is located below the machine frame. This facilitates worker control of the grinding process.

[0017] Furthermore, a manual positioning component is also provided on the workbench, the manual positioning component including:

[0018] A manual lead screw, the driving direction of which is perpendicular to the guide plate;

[0019] A positioning plate is installed on the drive block of the manual lead screw. A positioning element is mounted on this plate, and the positioning element cooperates with a guide plate. When the manual lead screw moves towards the guide plate, the positioning element locks the bushing onto the guide plate, preventing the bushing from slipping out and causing a safety hazard.

[0020] Furthermore, the manual lead screw includes a handwheel, a lead screw connected to the handwheel, a nut fitted on the lead screw, the nut connected to a drive plate, and a slide rail and a slider parallel to the lead screw on the drive plate to ensure that the driving direction is the direction of the lead screw. "Manual lead screw" is a general term.

[0021] Furthermore, the positioning component includes a positioning screw that passes through the positioning plate, and two positioning nuts are provided on the positioning screw, with the two positioning nuts located on opposite sides of the positioning plate. The positioning component can be fine-tuned by adjusting the two positioning nuts as needed.

[0022] Furthermore, a positioning clamping block is provided at the end of the positioning screw, which cooperates with the guide plate. This further ensures the clamping of the bushing.

[0023] Furthermore, the guide plate can be either shaft-shaped or plate-shaped. The shape can be selected according to actual needs.

[0024] Furthermore, a positioning groove is provided on the guide plate, and a step is provided inside the bushing to mate with the positioning groove. The positioning groove prevents the bushing from moving back and forth on the guide plate.

[0025] Furthermore, the electroplating layer thickness of the bushing is 2-5 micrometers thicker than the standard value. This thickness can be controlled by adjusting the electroplating time.

[0026] Furthermore, the bushing is also fitted with a plastic rod. The plastic rod is used for loading and unloading the bushing, avoiding product contamination caused by direct manual operation.

[0027] The beneficial technical effects of this utility model are: it aims to develop an innovative ultra-smooth surface processing technology for bushing fasteners. Through technological innovation and process optimization, the surface roughness of the electroplated layer of the bushing is achieved to be below Rpk0.5, while improving processing efficiency, reducing production costs, and enhancing the market competitiveness of the product. It achieves high-precision and high-efficiency processing of the bushing surface, meeting the quality requirements of an ultra-smooth surface. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of an ultra-smooth surface polishing device.

[0029] Figure 2 This is a schematic diagram of the polishing assembly.

[0030] Figure 3 This is a schematic diagram of the guide clamping assembly and the manual positioning assembly.

[0031] Figure 4 This is a schematic diagram of the manually positioned component.

[0032] Figure 5 This is a schematic diagram of the bushing.

[0033] in:

[0034] 1. Frame, 2. Workbench, 3. Support platform, 4. Guide plate, 5. Polishing assembly, 51. Polishing spindle, 52. Polishing wheel, 53. Cover, 54. Extension plate, 55. Collection hole, 6. Guide clamping assembly, 61. Guide shaft, 62. Guide wheel, 63. Foot switch, 7. Manual positioning assembly, 71. Manual lead screw, 72. Positioning plate, 73. Positioning component, 731. Positioning screw, 732. Positioning nut, 733. Positioning clamping block. Detailed Implementation

[0035] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0036] See appendix Figure 1-5The ultra-smooth surface polishing device for bushing fasteners shown includes a frame 1, a worktable 2 mounted on the frame 1, and a support platform 3 mounted on the rear side of the worktable 2; a guide plate 4 mounted on the support platform 3 and positioned directly above the worktable 2; a polishing assembly 5 located on one side of the guide plate 4; and a guide clamping assembly 6 located on the other side of the guide plate 4. The electroplated bushing is fitted onto the guide plate 4, and the guide clamping assembly 6 presses the bushing firmly onto the polishing assembly 5, which polishes the outer side of the bushing.

[0037] The polishing assembly 5 includes: a polishing spindle 51 mounted on a support table 3, with the polishing spindle 51 parallel to the surface of the worktable 2; a polishing wheel 52 mounted on the polishing spindle 51; and a polishing motor connected to the polishing spindle 51.

[0038] Furthermore, a protective cover 53 is provided on the outside of the polishing wheel 52. The protective cover 53 can collect the grinding powder during the grinding process and prevent it from spreading in the space.

[0039] Furthermore, an extension plate 54 is provided on the lower side of the protective cover 53, and the extension plate 54 extends to the collection hole 55 on the frame 1, with a collection bin correspondingly provided below the collection hole 55. By collecting the ground powder, pollution of the operating space is avoided, and waste metal is also collected, thus preventing waste.

[0040] Furthermore, the guide clamping assembly 6 includes: a guide shaft 61, on which a guide wheel 62 is rotatably mounted; the guide shaft 61 is also connected to a linear clamping unit, the driving direction of which is towards the polishing wheel 52. This achieves the driving of the guide wheel 62 and the clamping of the bushing onto the polishing wheel 52 for polishing; the linear clamping unit is hidden inside the frame 1.

[0041] Furthermore, the linear pressing unit is switched by a foot switch 63, which is located below the frame 1. This facilitates worker control of the grinding process.

[0042] Furthermore, a manual positioning component 7 is also provided on the workbench 2, which includes:

[0043] Manual lead screw 71, the driving direction of which is perpendicular to the guide plate 4;

[0044] A positioning plate 72 is provided on the drive block of the manual lead screw 71. A positioning element 73 is provided on the positioning plate 72, and the positioning element 73 is configured to cooperate with the guide plate 4. When the manual lead screw 71 moves towards the guide plate 4, the positioning element 73 locks the bushing onto the guide plate 4. This prevents the bushing from slipping out and causing a safety hazard.

[0045] Furthermore, the manual lead screw 71 includes a handwheel, a lead screw connected to the handwheel, a nut fitted on the lead screw, the nut connected to a drive plate, and a slide rail and a slider parallel to the lead screw on the drive plate to ensure that the driving direction is the direction of the lead screw. Manual lead screw 71 is a general term.

[0046] Furthermore, the positioning component 73 includes a positioning screw 731 that passes through the positioning plate 72, and two positioning nuts 732 are provided on the positioning screw 731, with the two positioning nuts 732 located on opposite sides of the positioning plate 72. The positioning component 73 can adjust the two positioning nuts 732 according to actual needs to achieve fine-tuning.

[0047] Furthermore, a positioning clamping block 733 is provided at the end of the positioning screw 731, which is configured to cooperate with the guide plate 4. This further ensures the clamping of the bushing.

[0048] Furthermore, the guide plate 4 can be either shaft-shaped or plate-shaped. The shape can be selected according to actual needs.

[0049] Furthermore, a positioning groove is provided on the guide plate 4, and a step is provided inside the bushing to mate with the positioning groove. The positioning groove prevents the bushing from moving back and forth on the guide plate 4.

[0050] Furthermore, the electroplating layer thickness of the bushing is 2-5 micrometers thicker than the standard value. This thickness can be controlled by adjusting the electroplating time.

[0051] Furthermore, the bushing is also equipped with a plastic rod. The bushing is fed and unloaded via the plastic rod, avoiding product contamination caused by direct manual operation.

[0052] The aim is to develop an innovative ultra-smooth surface machining process for bushing fasteners. Through technological innovation and process optimization, the roughness of the electroplated layer on the bushing surface will reach below Rpk 0.5, while improving machining efficiency, reducing production costs, and enhancing the product's market competitiveness. This will achieve high-precision, high-efficiency machining of the bushing surface, meeting the quality requirements for an ultra-smooth surface.

[0053] After being treated with this wool wheel polishing process, the surface roughness of bushing fasteners can be stably controlled below Ra0.05μm, and some high-precision products can even reach Ra0.02μm, fully meeting the standard of ultra-smooth surface.

[0054] Compared to traditional processes, this process reduces the unit product processing cost by 20%-25%. This is mainly due to the use of a wool wheel + fiber wheel polishing machine, which reduces material waste, lowers energy consumption, and increases processing efficiency, thus reducing labor costs. Based on an annual production of 100,000 bushings, this can save approximately 500,000-800,000 yuan annually.

[0055] Insert a plastic rod into the inner hole of the bushing, lift the electroplated bushing, and place it on the guide plate of the polishing machine. Align the step of the bushing with the groove of the guide plate. The groove on the guide plate is used to position the bushing and prevent it from moving back and forth. Press the foot switch, and the guide wheel on the right side of the polishing machine moves forward to the set position. This position is set according to the gap between the guide wheel on the right side of the polishing machine and the polishing wheel on the left side. The gap is determined by the outer diameter of the bushing, and the normal gap is 0.2mm larger than the outer diameter of the bushing. The fiber wheel rotating on the left side of the polishing machine polishes the bushing. Polishing continues for the set time (the polishing time is determined by the outer diameter of the product and the requirements, and is generally not less than 2 seconds). The guide wheel then retracts to the starting position. Use the plastic rod to remove the polished bushing from the guide plate.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A polishing device for ultra-smooth surfaces of bushing-type fasteners, characterized in that, include: A frame (1) is provided on the frame (1), and a worktable (2) is provided on the rear side of the worktable (2); A guide plate (4) is provided on the support platform (3) and is located directly above the workbench (2); Polishing assembly (5), which is located on one side of guide plate (4); A guide clamping assembly (6) is located on the other side of the guide plate (4); The electroplated bushing is fitted onto the guide plate (4), and the guide clamping assembly (6) presses the bushing onto the polishing assembly (5), which polishes the outer side of the bushing. The polishing assembly (5) includes: a polishing spindle (51) mounted on a support table (3), and the polishing spindle (51) being parallel to the surface of the worktable (2); a polishing wheel (52) mounted on the polishing spindle (51); and a polishing motor connected to the polishing spindle (51).

2. The ultra-smooth surface polishing device for bushing-type fasteners according to claim 1, characterized in that: A protective cover (53) is provided on the outside of the polishing wheel (52).

3. The ultra-smooth surface polishing device for bushing-type fasteners according to claim 2, characterized in that: An extension plate (54) is provided on the lower side of the protective cover (53), and the extension plate (54) extends to the collection hole (55) on the frame (1), and a collection compartment is provided below the collection hole (55).

4. The ultra-smooth surface polishing device for bushing-type fasteners according to claim 1, characterized in that: The guide clamping assembly (6) includes: a guide shaft (61), a guide wheel (62) rotatably mounted on the guide shaft (61), and a linear clamping unit connected to the guide shaft (61), the driving direction of which is toward the polishing wheel (52).

5. The ultra-smooth surface polishing device for bushing-type fasteners according to claim 4, characterized in that: The switch for the linear pressing unit is a foot switch (63), which is located below the frame (1).

6. The ultra-smooth surface polishing device for bushing-type fasteners according to claim 1, characterized in that: A manual positioning component (7) is also provided on the worktable (2), the manual positioning component (7) comprising: Manual lead screw (71), the driving direction of which is perpendicular to the guide plate (4); A positioning plate (72) is provided on the drive block of the manual screw (71). A positioning element (73) is provided on the positioning plate (72), and the positioning element (73) is configured to cooperate with the guide plate (4). When the manual screw (71) moves toward the guide plate (4), the positioning element (73) will lock the bushing onto the guide plate (4).

7. The ultra-smooth surface polishing device for bushing-type fasteners according to claim 6, characterized in that: The positioning component (73) includes: a positioning screw (731) that passes through the positioning plate (72) and has two positioning nuts (732) on it, with the two positioning nuts (732) on both sides of the positioning plate (72) respectively. A positioning clamping block (733) is provided at the end of the positioning screw (731), and the positioning clamping block (733) cooperates with the guide plate (4).

8. The ultra-smooth surface polishing device for bushing-type fasteners according to claim 1, characterized in that: The guide plate (4) is provided with a positioning groove, and a step that cooperates with the positioning groove is provided inside the bushing.

9. The ultra-smooth surface polishing device for bushing-type fasteners according to claim 1, characterized in that: The thickness of the electroplated layer on the bushing is 2-5 micrometers greater than the standard value.

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