A processing device for polishing ball studs

Abstract

The present invention discloses a processing equipment for polishing a ball stud, which relates to the technical field of polishing equipment and comprises a clamping part, which clamps and fixes the non-ball head part of the ball stud, the polishing sheet is triangular in shape, and a connecting part is provided at the corner of the non-polished surface of the polishing sheet, and the pressure-applying part comprises a main pressure rod, the axial direction of the main pressure rod is toward the ball head center of the ball stud, and the main pressure rod is connected to one end toward the ball head with three pressure-dividing rods, and the other end of each pressure-dividing rod is connected to the connecting part of a corresponding polishing sheet, and the polishing sheet covers the surface of the ball head under the pressure of the pressure-applying part, and at least covers the entire minimum rotation edge of the ball head around the axis. This processing equipment for polishing a ball stud can polish the entire ball head by rotating at one time by providing the polishing sheet and the pressure-applying part that cover the entire rotation line of the ball stud, thereby avoiding differences caused by polishing different areas each time, making the continuity and integrity of the polishing better, and improving the polishing effect.

Description

Technical Field

[0001] The invention relates to the technical field of polishing equipment, in particular to processing equipment for polishing ball studs. Background Art

[0002] Ball studs are widely used in independent suspension systems. Control arms or thrust rods are often connected to other components through ball studs at the ends. The main function of the ball studs is to enable the wheels to bounce up and down and turn.

[0003] The ball stud needs to be polished after production. The existing fine polishing is mainly done by wool wheel or microfiber wheel with polishing paste. However, because the end of the ball stud is a ball head, during the polishing process, the polishing wheel Figure 1 As shown, there are several problems with its polishing. The first is that the polishing position is a spherical surface, while the corresponding polishing wheel is a plane. As pressure is applied to the polishing wheel, the polishing action surface of the polishing wheel surface is subjected to different pressures, that is, the closer to the center position, the greater the pressure, and the smaller the pressure at the edge. Polishing is not only related to the material and roughness of the polishing wheel but also to pressure. The greater the pressure, the greater the polishing cutting depth, which makes the polishing depth of each position of a single action surface of the polishing wheel different. On the other hand, because the polishing wheel cannot act on the entire surface to be polished, the polishing wheel is constantly moved, and each polishing surface has a polishing range. There will be differences in polishing marks between the action surfaces of different polishings, forming a discontinuous polishing surface. To make the polishing surface continuous, more polishing is required to cover the polishing marks, and it also depends on the operator's experience (such as the pressure applied and the polishing time at the same position). Moreover, the polishing wheel is a consumable and needs to be replaced after polishing to a certain extent, or as Figure 1 As shown in the figure, the wear of the working surface of the polishing wheel varies due to different pressures at different positions during a single polishing, which results in different polished surfaces during subsequent polishing. To this end, we propose a processing device for polishing ball studs. Summary of the Invention

[0004] The object of the present invention is to provide a processing device for polishing a ball stud to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a processing device for polishing a ball stud, comprising a clamping portion, the clamping portion clamping and fixing the non-ball head portion of the ball stud, and the clamping portion being fixed to a rotatable drive shaft, wherein the axis of the clamping portion after clamping the ball stud is collinear with the axis of the drive shaft;

[0006] The polishing sheet is triangular in shape, and a connecting portion is provided at a corner of a non-polishing surface of the polishing sheet;

[0007] The pressure applying part includes a main pressure rod, the axial direction of the main pressure rod is toward the center of the ball head of the ball stud, and one end of the main pressure rod facing the ball head is connected to three pressure dividing rods, and the other end of each pressure dividing rod is connected to a connecting part of a polishing sheet;

[0008] The polishing sheet covers the surface of the ball head under the pressure of the pressure applying part, and at least covers the entire minimum rotation edge of the ball head around the axis.

[0009] Preferably, the pressure dividing rod is divided into two sections, and a pressure sensor is provided between the two sections to detect the pressure applied to each pressure dividing rod.

[0010] Preferably, one pressure dividing rod in the pressure-applying part is located in the center area of ​​the top of the ball head, and the other two pressure dividing rods are located in the same axial position along the ball head pin. The three pressure dividing rods make the horizontal width of the overlapping area between the polishing sheet and the ball head surface increase first and then decrease along the axial direction of the ball head pin.

[0011] Preferably, the maximum transverse width of the overlapping area between the polishing sheet and the ball head surface coincides with the maximum outer diameter line of the ball head along the axial direction of the ball pin.

[0012] Preferably, the polishing sheet is in the form of a continuous long sheet, and both ends are tensioned and conveyed by tensioning rollers, and a plurality of groups of connecting parts, each group consisting of three, are provided on the non-polishing surface of the polishing sheet.

[0013] Preferably, the clamping part and the pressure part are each provided with two groups of double stations, and the two groups share the same polishing sheet, and a tensioning roller is added to the two stations, and the pressure parts corresponding to the two stations are in opposite shapes.

[0014] Preferably, the connection between the connecting portion on the polishing sheet and the pressure dividing rod is a snap-on connection.

[0015] Preferably, the angle between the pressure dividing rod and the main pressure rod can be adjusted within a range.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a polishing sheet and a pressure portion covering the entire rotation line of the ball stud, so that the entire ball stud can be polished in one rotation, thereby avoiding differences caused by polishing different areas each time, improving the continuity and integrity of the polishing and enhancing the polishing effect;

[0018] The polishing sheet of the present invention, through its own shape and the action of the pressure-applying portion, makes the covering surface that contacts the ball head surface adapt to the lateral width of the ball head surface, thereby making the wear degree of each part of the polishing sheet similar, and thus maintaining the same polishing effect on each area before replacement, without local differentiation;

[0019] The present invention realizes continuous polishing by arranging the polishing sheet into a rolled sheet shape, automatically replaces the position of the polishing sheet, and improves the polishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of polishing of an existing polishing sheet;

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 3 Schematic diagram of the cross-sectional coverage line structure of the polishing sheet;

[0023] Figure 4 Schematic diagram of the overlapping area between the polishing sheet and the ball head;

[0024] Figure 5 for Figure 4 A front view of the overlapping area;

[0025] Figure 6 Schematic diagram of the fitted and unfolded state of the overlapping area between the polishing sheet and the ball head;

[0026] Figure 7 Schematic diagram of the distribution of the tensioning roller and the pressure point;

[0027] Figure 8 Schematic diagram of the working area distribution of the polishing sheet with alternating forward and reverse directions in a double-station state;

[0028] Figure 9 A schematic diagram of the distribution of the working area of ​​a double-station polishing sheet according to another embodiment;

[0029] Figure 10 A schematic diagram of the distribution of the working area of ​​a polishing sheet in one embodiment of a multi-station;

[0030] Figure 11 To distinguish from Figure 10 A schematic diagram of the distribution of the polishing pad working area of ​​another embodiment of the multi-station.

[0031] In the figure: 1-clamping part; 2-polishing sheet; 201-connecting part; 3-pressure applying part; 301-main pressure rod; 302-dividing pressure rod; 4-tensioning roller. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figure 2 and Figure 3 The present invention provides a technical solution: a processing device for polishing a ball stud, wherein the ball stud is composed of a ball head, a ball head seat, and a rod portion, wherein the rod portion is provided with a thread, and a clamping portion 1 is used to clamp the ball head seat or the rod portion. The clamping portion 1 adopts a common workpiece fixture, such as a three-jaw chuck or an equivalent fixture. The clamping portion 1 is installed on a rotatable main shaft, and the rotation of the main shaft drives the ball stud to rotate, thereby polishing;

[0034] The polishing pad 2 is different from the traditional disc shape and adopts a triangular or quasi-triangular shape. The triangular shape can better fit the ball head surface by applying force at three points. Too many force application points can easily cause wrinkles on the polishing pad 2, especially at the edges, thereby affecting the polishing integrity of the polishing pad 2. Three points are relatively easier to parallelize.

[0035] The pressure-applying portion 3 is mainly used to apply pressure to the polishing sheet 2 so that the center area of ​​the polishing surface of the polishing sheet 2 fits against the ball surface of the ball stud. The pressure-applying portion 3 is mounted on a movable and direction-changeable carrier platform. The carrier platform is used to change the pressure direction and position of the pressure-applying portion 3, thereby adapting to ball studs of different sizes. Specifically, the pressure-applying portion 3 is composed of a main pressure rod 301 mounted on the carrier platform and a pressure divider rod 302 mounted at the end of the main pressure rod 301. The pressure divider rod 302 is provided in three groups, and one end of the whole is connected to the end of the main pressure rod 301, and the other end is triangularly distributed corresponding to the corners of the polishing sheet 2.

[0036] The three corners of the polishing sheet 2 are all provided with connecting parts 201, which are fixed with the end of the pressure dividing rod 302 through the connecting parts 201, so as to stably apply pressure. After the pressure is applied, a pulling force is generated from the corners, and at the same time, the polishing sheet 2 is integrally fitted with the ball head surface of the ball stud and exerts pressure, thereby driving the ball stud to rotate under the action of the main shaft of the clamping part 1 for polishing. The connecting part 201 adopts a quick-release structure. For example, a blind hole is provided at the corner of the back of the polishing sheet 2 (the other side opposite to the polishing surface), and the end of the pressure dividing rod 302 is positioned and restricted through the blind hole. Then, the polishing sheet 2 is opened under pressure and pressed and fitted. A male and female buckle method can also be adopted, preferably Velcro. A male or female buckle is provided at the corner of the polishing sheet 2, and a female or male buckle is provided at the end of the pressure dividing rod 302, which is convenient for quick connection, fixation and pressure application, and can also be quickly removed when replaced.

[0037] When the polishing sheet 2 is attached to the ball head surface of the ball stud, it should at least cover the entire rotation edge line of the ball head, that is, Figure 3As shown, the ball head of the ball stud is a sphere, and its minimum rotation edge line is half of the cross-section passing through the center of the sphere. However, because the part where the ball head of the ball stud is connected to the ball head seat is aspherical, that is, the ball head is not a complete sphere, its minimum rotation edge line is half of the cross-section passing through the axis of the rod part. The polishing sheet 2 covers the entire minimum rotation edge line, so that when the ball stud rotates, the polishing sheet 2 can polish the entire ball head surface, and multiple grinding will not occur, resulting in isolation of the boundaries of different grinding times and discontinuity of the polished surface.

[0038] The pressure dividing rod 302 is connected to the main pressure rod 301 in an adjustable manner, that is, the pressure dividing rod 302 can change the angle between the axis of the main pressure rod 301, and further, the angle between two adjacent pressure dividing rods 302 can be set to change, so as to adjust according to the size of different ball studs.

[0039] The pressure dividing rod 302 is provided in two sections, and a pressure sensor is provided between the two sections. The function of the pressure sensor is to detect the pressure received by each pressure dividing rod 302. By adjusting the force direction of the main pressure rod 301, the pressure on each individual rod of the pressure dividing rod 302 is changed, thereby ensuring that the pressure exerted by each rod on the corner of the polishing sheet 2 can be balanced (not the same). Figure 2 As shown, the three angles are a, b and c, corner a is located at the top of the ball pin, and the other two corners b and c are located at the position of the ball seat, that is, corner b and corner c are stacked, and then the pressure divider rods 302 corresponding to corners b and corner c should apply equal pressure, and corner a needs to be calculated and determined based on the shape of the polishing sheet 2 and the angle between the pressure divider rod 302 and the polishing sheet 2. Therefore, in order to be more convenient to use, it is preferred to set the polishing sheet 2 into an equilateral triangle, and then only the three pressure divider rods 302 need to apply the same force and ensure the same angle.

[0040] See Figure 3 、 Figure 4 and Figure 5 , the positions of the corners of the pressure dividing rod 302 and the polishing sheet 2 can be diverse, as long as the entire ball head surface is covered during the polishing after pressure is applied. However, because the path lengths corresponding to the rotation paths of the spherical surface are different when the spherical surface rotates, if the widths of the corresponding polishing sheets 2 are the same, the wear will also be extremely inconsistent. In order to overcome this problem, only the shorter path length corresponds to the shorter width of the polishing sheet 2, and the longer path corresponds to the longer width of the polishing sheet 2, so that the wear of each part of the polishing sheet 2 is close, thereby achieving maximum efficiency. When replacing, the entire piece is scrapped, rather than just part of it. Therefore, in order to improve the overall utilization rate, the polishing sheet 2 is placed as follows. Figure 4As shown, one corner is located at the top of the ball head, and the other is located at the position of the ball head seat, or the opposite setting is set, two are located on both sides of the top of the ball head, and the other is located at the position of the ball head seat. By adjusting the specific position of each corner, it is possible to achieve an increase in the lateral width of the polishing sheet 2 corresponding to the middle position of the ball head seat along the axial direction of the ball pin, and further, the polishing sheet 2 is triangular, that is, the edge can be set to an arc shape, thereby changing the lateral width, thereby ensuring the degree of wear.

[0041] In order to achieve the best state, it is preferably set to the state where the corner a is on top, such as Figure 3 As shown, the position of the corner is adjusted so that the vertical distance H from the edge point d of the actual maximum horizontal distance of the polishing sheet 2 to the center e of the ball head along the axial direction of the ball pin is as small as possible, and the distance is zero, which is the best state.

[0042] See Figure 6 、 Figure 7 and Figure 8 In order to further improve the convenience of use, that is, to polish in a continuous manner instead of replacing the polishing sheet 2 each time, tensioning rollers 4 are set on both sides of the ball stud. The tensioning rollers 4 clamp and tension the sheet-like polishing sheet 2, and the two ends are wound up by the winding rollers. The pressure is applied by the pressure part 3 as shown in FIG. Figure 8 As shown, a triangular working area is formed under the action of the pressure dividing rod 302, thereby forming a single working area. When the polishing pad 2 needs to be replaced during use, it is only necessary to change the working area of ​​the polishing pad 2 and use it again. The polishing pad 2 is actually attached in an elliptical shape, and the two sides are relatively expanded after being unfolded. According to the shape after unfolding, the position can be planned on the continuous polishing pad 2, thereby eliminating the positioning problem of replacing the polishing pad 2 (inaccurate attachment position affects the polishing effect);

[0043] Furthermore, cheaper materials can be used in the non-polishing area of ​​the long sheet-shaped polishing sheet 2 to reduce costs, and the connecting parts 201 are arranged in groups of three in a corresponding working area and arranged in an array along the length direction.

[0044] See Figure 8 、 Figure 9 and Figure 10 Because the single working area of ​​the polishing sheet 2 is triangular or quasi-triangular, and the horizontal middle position of the working area is the widest, if it is directly arranged continuously when arranged horizontally, the arrangement density per unit length is relatively low. Therefore, a double station is set to work to increase the arrangement density. There are two situations for the double station. One is to use the pressure part 3 in an inverted state (the aforementioned point a is positive when it is at the top of the ball head, and inverted when it is at the ball head seat). Figure 8 As shown, by alternating between the two states, the horizontal distance can be shortened and the horizontal utilization rate can be improved. Figure 9 As shown, the two upright installation methods form a difference in height position, and adjusting the horizontal and vertical distribution can improve the effective distribution rate of the polishing sheet 2. Because if two adjacent working areas are to work at the same time, the spatial overlap of the pressure-applying part 3 and the like will be affected. Therefore, the duplex stations do not have to be completely adjacent, they can be staggered, or they can be completely two devices, and different areas can be used alternately on the same polishing sheet 2.

[0045] For further information, see Figure 10 and Figure 11 , you can also set more distribution methods and make selective settings based on specific usage.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A processing equipment for polishing a ball stud, characterized in that: include A clamping portion (1), the clamping portion (1) clamps and fixes the non-ball head portion of the ball stud, and the clamping portion (1) is fixed on a rotatable drive shaft, and the rear axis of the clamping portion (1) after clamping the ball stud is collinear with the axis of the drive shaft; A polishing sheet (2), wherein a single working area is provided on the polishing sheet (2), the single working area is triangular, and a connecting portion (201) is provided at a corner of the non-polishing surface of the polishing sheet (2) corresponding to the single working area; A pressure-applying portion (3), the pressure-applying portion (3) comprising a main pressure rod (301), the axial direction of the main pressure rod (301) facing the center of the ball head of the ball pin, one end of the main pressure rod (301) facing the ball head being connected to three pressure-dividing rods (302), the other end of each pressure-dividing rod (302) corresponding to a connection portion (201) of a single working area of ​​the polishing sheet (2); One of the pressure dividing rods (302) in the pressure applying portion (3) is located in the center area of ​​the top of the ball head, and the other two pressure dividing rods (302) are located in the same axial position along the ball head pin. The three pressure dividing rods (302) make the transverse width of the overlapping area of ​​the polishing sheet (2) and the ball head surface increase first and then decrease along the axial direction of the ball head pin. The polishing sheet (2) covers the surface of the ball head under the pressure of the pressure-applying portion (3), and at least covers the entire minimum rotation edge of the ball head around the axis.

2. The processing equipment for polishing a ball stud according to claim 1, characterized in that: The pressure dividing rod (302) is divided into two sections, and a pressure sensor is provided between the two sections for detecting the magnitude of the pressure applied to each pressure dividing rod (302).

3. The processing equipment for polishing a ball stud according to claim 1, characterized in that: The maximum transverse width of the area where the polishing sheet (2) overlaps with the surface of the ball head coincides with the maximum outer diameter line of the ball head along the axial direction of the ball pin.

4. The processing equipment for polishing a ball stud according to claim 1, characterized in that: The polishing sheet (2) is in the form of a continuous long sheet, and both ends are tensioned and transported by tensioning rollers (4). The non-polishing surface of the polishing sheet (2) is provided with a plurality of groups of connecting portions (201) of three.

5. The processing equipment for polishing a ball stud according to claim 4, characterized in that: The clamping portion (1) and the pressure portion (3) are both provided with two groups of double workstations, and the two groups share the same polishing sheet (2). A tensioning roller (4) is added to the two workstations, and the pressure portions (3) corresponding to the two workstations are in opposite shapes.

6. The processing equipment for polishing a ball stud according to claim 4, characterized in that: The connection between the connecting portion (201) on the polishing sheet (2) and the pressure dividing rod (302) is in the form of a snap-on connection.

7. The processing equipment for polishing a ball stud according to claim 1, characterized in that: The range angle between the pressure dividing rod (302) and the main pressure rod (301) can be adjusted.

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