Case corner polishing apparatus and method based on brush-assisted force flow

Abstract

The present application provides a watchcase corner polishing device and method based on brush auxiliary force rheology, wherein the watchcase corner polishing device comprises a workpiece clamping device, a feeding device, a polishing tank device and a power device. The method of the present application polishes the corners of a watchcase according to specific steps using the watchcase corner polishing device. In the polishing device, a brush roller that can rotate is arranged in the polishing tank, and a string piece shaft support that can make reciprocating linear motion is arranged above the brush roller. During polishing, the workpiece makes reciprocating motion with the string piece shaft support, and the brush hairs of the brush roller wrap and entangle the force rheology polishing liquid to act on the surface of the workpiece. The action of the brush hairs enables the force rheology polishing liquid to form relative motion with the corner part of the watchcase, generates force rheology effect, forms a flexible fixed abrasive tool, removes material from the corner part of the watchcase, and at the same time, the action of the brush hairs enables the force rheology polishing liquid not to form lumps on the corner of the watchcase, thereby realizing effective force rheology polishing.

Description

Technical Field

[0001] This invention relates to the field of ultra-precision machining, and in particular to a device and method for polishing watch case edges and corners based on brush-assisted force rheology. Background Technology

[0002] With the rapid development of the manufacturing industry, the demand for high-precision, high-quality product surface processing is showing an increasing trend. Against this backdrop, force rheological polishing technology, as an advanced surface processing technology, has received widespread attention. This technology, with its high efficiency and precision, demonstrates enormous application potential in fields such as aerospace, automotive, and precision machinery. Currently, there are three existing force rheological polishing solutions: channel-based concave surface adaptive force rheological polishing, vertical concave surface polishing, and horizontal force rheological polishing. Existing force rheological processes can effectively polish some concave surfaces, achieving good shape accuracy and surface finish. Compared to some other ultra-precision machining technologies, force rheological polishing is more economical. Compared to manual polishing, it has high polishing efficiency and occupies less space.

[0003] like Figure 1 The watch case shown has always presented a challenge in polishing its corners. Manual polishing is inefficient and results in high costs. For the corners of the watch case, existing force rheological polishing techniques suffer from poor flow of the polishing fluid at these locations, leading to clumping and hindering effective polishing. Therefore, there is a need to develop a force rheological polishing device and method capable of polishing the corners of watch cases. Summary of the Invention

[0004] This invention provides a watch case edge polishing device and method based on brush-assisted force rheology. The technical solution of this invention can achieve effective force rheological polishing of the edges and corners of watch cases.

[0005] The technical solution of the present invention for polishing equipment is as follows:

[0006] A watch case edge polishing device based on brush-assisted force rheology includes a workpiece clamping device, a polishing tank device, a feeding device, and a power device. The workpiece clamping device includes a connecting shaft, a separating sleeve, and a workpiece clamping block. One end of the connecting shaft has a limiting part, and the other end is threaded for installing the workpiece clamping block. The separating sleeve can be fitted onto the connecting shaft. The polishing tank device includes a frame and a polishing tank mounted on the frame. A brush roller is provided in the polishing tank, and the brush roller is provided with bristles. The brush roller can be driven to rotate by the power device. The feeding device includes a connecting shaft support for mounting the connecting shaft. The connecting shaft support is located above the polishing tank and can be driven by the power device to perform reciprocating linear motion. The direction of motion of the connecting shaft support is perpendicular to the axis of the brush roller.

[0007] Compared with the prior art, the polishing device of the present application is provided with a brush roller capable of rotating in the polishing tank, and a string shaft support capable of reciprocating linearly above the brush roller. During polishing, the workpiece reciprocates with the string shaft support, and the brush hairs of the brush roller wrap and entangle the force flow rheological polishing liquid to act on the surface of the workpiece. The action of the brush hairs enables the force flow rheological polishing liquid to form relative motion with the corner parts of the watch case, thereby generating force flow rheological effect and forming a flexible fixed abrasive tool to remove material from the corner parts of the watch case. Meanwhile, the action of the brush hairs prevents the force flow rheological polishing liquid from forming lumps on the corner parts of the watch case, thereby realizing effective force flow rheological polishing. In addition, the polishing device of the present application can accommodate multiple workpieces to be processed on the string shaft at a time, which is beneficial to batch processing.

[0008] As an optimization, the aforementioned watch case corner polishing device based on brush-assisted force flow rheology is provided with a drain port at the bottom of the polishing tank, and a detachable plug is arranged in the drain port. In this way, waste liquid can be discharged through the drain port, and new force flow rheological polishing liquid can be conveniently replaced.

[0009] As an optimization, the aforementioned watch case corner polishing device based on brush-assisted force flow rheology is provided with a guide column above the polishing tank, and the string shaft support is slidably connected to the guide column through a linear bearing. This structure is easy to implement and has high reliability, and can enable the string shaft support to remain stable during reciprocating linear motion.

[0010] As an optimization, the aforementioned watch case corner polishing device based on brush-assisted force flow rheology is provided with a frame-shaped body, mounting grooves, and pressing shaft blocks. A pair of mounting grooves for mounting the string shaft are arranged on both sides of the frame-shaped body. Correspondingly, a pressing shaft block for positioning the string shaft is arranged on both sides of the frame-shaped body. The two ends of the string shaft are square-shaped, and after mounting, the two ends of the string shaft are located in the mounting grooves and are pressed by the pressing shaft blocks, thereby achieving detachable and fixed mounting. This structure is easy to dismount and mount the workpiece, and can ensure the stability of the workpiece during processing. When implementing the present application, multiple pairs of mounting grooves can be provided to mount multiple string shafts, thereby improving production efficiency.

[0011] As an optimization, the aforementioned watch case corner polishing device based on brush-assisted force flow rheology is provided with a frame-shaped body, mounting grooves, and pressing shaft blocks. A pair of mounting grooves for mounting the string shaft are arranged on both sides of the frame-shaped body. Correspondingly, a pressing shaft block for positioning the string shaft is arranged on both sides of the frame-shaped body. The two ends of the string shaft are square-shaped, and after mounting, the two ends of the string shaft are located in the mounting grooves and are pressed by the pressing shaft blocks, thereby achieving detachable and fixed mounting. This structure is easy to dismount and mount the workpiece, and can ensure the stability of the workpiece during processing. When implementing the present application, multiple pairs of mounting grooves can be provided to mount multiple string shafts, thereby improving production efficiency.

[0012] As an optimization, the aforementioned watch case corner polishing device based on brush-assisted force flow rheology is provided with a frame-shaped body, mounting grooves, and pressing shaft blocks. A pair of mounting grooves for mounting the string shaft are arranged on both sides of the frame-shaped body. Correspondingly, a pressing shaft block for positioning the string shaft is arranged on both sides of the frame-shaped body. The two ends of the string shaft are square-shaped, and after mounting, the two ends of the string shaft are located in the mounting grooves and are pressed by the pressing shaft blocks, thereby achieving detachable and fixed mounting. This structure is easy to dismount and mount the workpiece, and can ensure the stability of the workpiece during processing. When implementing the present application, multiple pairs of mounting grooves can be provided to mount multiple string shafts, thereby improving production efficiency.

[0013] As optimization, the aforementioned watchcase edge polishing device based on the auxiliary force rheology of brush, the frame body is further provided with an ear, an adjusting stud is arranged on the ear, and the adjusting stud is connected with the adjusting plate through a screw pair. Thus, the height of the adjusting plate can be adjusted through the adjusting stud, and the operation is easy.

[0014] As optimization, the aforementioned watchcase edge polishing device based on the auxiliary force rheology of brush, the power device comprises a motor and a reciprocating mechanism; the reciprocating mechanism comprises a moving frame capable of moving in the horizontal direction relative to the frame, and a sector gear for driving the moving frame to reciprocate; the moving frame is provided with two racks for engaging with the sector gear, and the two racks are located on the upper and lower sides of the sector gear respectively, and only one of the two racks is engaged with the sector gear during rotation of the sector gear, and when the sector gear is disengaged from one of the two racks, the other rack is engaged with the sector gear; the motor is simultaneously connected with the rotating shaft of the brush roller and the rotating shaft of the sector gear; and the frame body is fixedly connected with the moving frame. The motor is connected with the sector gear through a belt transmission mechanism. By using the above design, the rotation of the brush and the reciprocating movement of the workpiece clamping device are realized by one motor, the manufacturing cost is low, and the structure is compact, which is beneficial to miniaturization of the device.

[0015] For the polishing method, the present application provides the following technical scheme:

[0016] The watchcase edge polishing method based on the auxiliary force rheology of brush utilizes the watchcase edge polishing device of the present application to polish the edges of the watchcase, and the steps are as follows:

[0017] Step 1: alternately load the spacer sleeve and the workpiece on the string shaft in sequence, tighten the workpiece pressing block to fix the workpiece, and install the string shaft on the string shaft support;

[0018] Step 2: add the force rheology polishing liquid into the polishing tank so that the polishing liquid covers the surface of the workpiece to be polished; start the motor to drive the brush roller to rotate and simultaneously drive the string shaft support to move linearly and reciprocally;

[0019] Step 3: after polishing for a set time, turn off the power, remove the string shaft, then install the string shaft on the string shaft support after turning or rotating the string shaft by 180°;

[0020] Step 4: restart the motor, and after polishing for a set time, turn off the power, remove the workpiece, clean it, and then store it.

[0021] Compared with the prior art, the polishing method of the present application utilizes the watchcase edge polishing device of the present application, can effectively polish the edge of the watchcase, and the method steps are easy to implement in industrialization. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structure schematic diagram of a watchcase edge polishing equipment based on a brush auxiliary force rheology of an embodiment of the present application.

[0023] Figure 2 is a structure schematic diagram of a processing object of a watchcase edge polishing equipment based on a brush auxiliary force rheology of an embodiment of the present application, wherein the circled part is an edge part needing to be polished;

[0024] Figure 3 is a structure schematic diagram of a workpiece clamping device of a watchcase edge polishing equipment based on a brush auxiliary force rheology of an embodiment of the present application.

[0025] Figure 4 is a structure schematic diagram of a feeding device of a watchcase edge polishing equipment based on a brush auxiliary force rheology of an embodiment of the present application.

[0026] Figure 5 is a structure schematic diagram of a polishing tank device of a watchcase edge polishing equipment based on a brush auxiliary force rheology of an embodiment of the present application.

[0027] Figure 6 is a structure schematic diagram of a reciprocating mechanism structure of a watchcase edge polishing equipment based on a brush auxiliary force rheology of an embodiment of the present application

[0028] The marks in the drawings are: 1-serial part shaft, 101-limiting part, 2-isolation sleeve, 3-workpiece pressing block, 4-rack, 5-polishing tank, 501-plug, 6-brush roller, 7-serial part shaft support, 701-frame body, 702-mounting groove, 703-pressing shaft block, 704-adjusting plate, 705-lifting lug, 706-adjusting stud, 8-guide column, 9-linear bearing, 10-motor, 11-reciprocating mechanism, 1101-moving frame, 1102-fan-shaped gear, 12-workpiece, 13-belt transmission mechanism. DETAILED DESCRIPTION

[0029] The present application will be further described below in combination with the drawings and embodiments, but it is not taken as the basis for limiting the present application.

[0030] Embodiment (see Figures 1-6 ):

[0031] The watchcase edge polishing equipment based on a brush auxiliary force rheology of the present application comprises a workpiece clamping device, a polishing tank device, a feeding device and a power device.

[0032] In the embodiment, the workpiece clamping device comprises a string shaft 1, an isolation sleeve 2 and a workpiece pressing block 3. The string shaft 1 is provided with a limiting portion 101 at one end and is provided with threads for mounting the workpiece pressing block 3 at the other end. The isolation sleeve 2 can be sleeved on the string shaft 1. During machining, the isolation sleeve 2 and the workpiece 12 are alternately sleeved on the string shaft 1 and are pressed by the workpiece pressing block 3.

[0033] In the embodiment, the polishing tank device comprises a rack 4 and a polishing tank 5 arranged on the rack 4. The polishing tank 5 is provided with a brush roller 6, and the brush roller 6 is provided with bristles. The brush roller 6 can be driven to rotate by a power device. During polishing, the bristles of the brush roller 6 act on the surface of the workpiece 12.

[0034] In the embodiment, the feeding device comprises a string shaft support 7 for mounting the string shaft 1. The string shaft support 7 is arranged above the polishing tank 5 and can be driven to move linearly reciprocally by a power device. The moving direction of the string shaft support 7 is perpendicular to the axis of the brush roller 6. During polishing, the string shaft 1 is fixed on the string shaft support 7, and the string shaft support 7 is driven to move linearly reciprocally by the power device, so as to drive the workpiece to move reciprocally.

[0035] In the embodiment, the bottom of the polishing tank 5 is provided with a drain port, and the drain port is provided with a detachable plug 501. After the rheological polishing liquid is invalid, the waste liquid can be discharged through the drain port, so that the new rheological polishing liquid can be conveniently replaced.

[0036] In the embodiment, the polishing tank 5 is provided with a guide column 8 above the polishing tank 5, and the string shaft support 7 is slidably connected with the guide column 8 through a linear bearing 9. During polishing, the string shaft support 7 moves linearly reciprocally along the guide column 8.

[0037] In the embodiment, the string shaft support 7 comprises a frame-shaped body 701, mounting grooves 702 and shaft pressing blocks 703. The frame-shaped body 701 is provided with a pair of mounting grooves 702 on both sides for mounting the string shaft 1. Correspondingly, the frame-shaped body 701 is also provided with shaft pressing blocks 703 on both sides for positioning the string shaft 1. The both ends of the string shaft 1 are square-shaped. After mounting, the both ends of the string shaft 1 are located in the mounting grooves 702 and are pressed by the shaft pressing blocks 703, so as to achieve detachable fixed mounting. The both ends of the string shaft 1 are square-shaped. After mounting, the end portion of the string shaft 1 is circumferentially limited by the mounting grooves 702 and cannot rotate. Meanwhile, the string shaft 1 is pressed by the shaft pressing blocks 703, so as to be fixed.

[0038] In the embodiment, the mounting groove 702 and the pressing shaft block 703 are arranged on the frame body 701 through the adjusting plate 704, and the adjusting plate 704 can adjust the height. The adjusting plate 704 is fixed on the frame body 701 through the stud passing through the long waist hole, and when the height needs to be adjusted, the stud is loosened, then the adjusting plate 704 is adjusted to the required height, and the stud is tightened again.

[0039] In the embodiment, the frame body 701 is further provided with the lifting lug 705, the adjusting stud 706 is arranged on the lifting lug 705, and the adjusting stud 706 is connected with the adjusting plate 704 through a screw pair. When the height of the adjusting plate 704 is adjusted, the adjusting stud 706 is only rotated, and the operation is more convenient.

[0040] In the embodiment, the power device comprises a motor 10 (a reduction motor in the embodiment) and a reciprocating mechanism 11. The reciprocating mechanism 11 comprises a moving frame 1101 which can move in the horizontal direction relative to the frame 4, and a sector gear 1102 for driving the moving frame 1101 to reciprocate. The moving frame 1101 is provided with two racks for engaging with the sector gear 1102, and the two racks are respectively arranged on the upper and lower sides of the sector gear 1102. During the rotation of the sector gear 1102, only one of the two racks is engaged with the sector gear 1102, and when the sector gear 1102 is disengaged from one of the two racks, the sector gear 1102 is engaged with the other rack. The motor 10 is in transmission connection with the rotating shaft of the brush roller 6 and the rotating shaft of the sector gear 1102. The frame body 701 is fixedly connected with the moving frame 1101. The motor 10 is in transmission connection with the sector gear 1102 through a belt transmission mechanism 13. After the motor 10 is started, the brush roller 6 is driven, and the sector gear 1102 is also driven to rotate through the belt transmission mechanism. During the rotation of the sector gear 1102, the racks are repeatedly switched to drive the frame body 701 to reciprocate. Of course, when the present application is implemented, two motors 10 can be used to drive the brush roller 6 and the string shaft support 7 respectively, and the reciprocating mechanism 11 can also adopt other forms. Compared with the structure adopted in the embodiment, the implementation cost is lower, and the miniaturization design of the equipment is facilitated.

[0041] In the embodiment, the steps of polishing the edge corner of the watch case are as follows:

[0042] Step one, alternately mount the isolation sleeve 2 and the workpiece 12 on the string shaft 1, tighten the workpiece pressing block 3 to fix the workpiece 12, and mount the string shaft 1 on the string shaft support 7. When the watch case is clamped, the angle of the watch case is deflected to make the edge corner of the watch case be better polished.

[0043] Step two, add the force flow polishing liquid into the polishing tank 5, so that the polishing liquid covers the surface of the workpiece 12 by 70mm; start the motor 10 to drive the brush roller 6 to rotate and the string shaft support 7 to move linearly;

[0044] Step three, after polishing for a set time, turn off the power, remove the string shaft 1, then rotate the string shaft 1 by 180° and re-install it on the string shaft support 7 (after polishing the corners on one side, rotate the workpiece 12 by 180° to polish the corners on the other side);

[0045] Step four, restart the motor 10, after polishing for a set time (at this time, the corners on the other side have been polished), turn off the power, remove the workpiece 12, clean it and store it.

[0046] In the example, the abrasive particles in the force flow polishing liquid are 5000# alumina, the rotating speed of the brush roller 6 is 90rpm, and after 60min of polishing, the surface roughness of the corners of the watch case is reduced from about 90nm to about 40nm, which has good polishing effect.

[0047] The general description of the invention involved in the present application and the description of the specific embodiments should not be understood as a limitation of the technical solutions of the invention. Based on the disclosure of the present application, the skilled in the art can add, reduce or combine the disclosed technical features in the general description or / and the specific embodiments (including examples) without violating the elements of the invention involved, to form other technical solutions within the protection scope of the present application.

Claims

1. A watch case corner polishing apparatus based on brush-assisted force flow rheology, characterized by: The watch case corner polishing device comprises a workpiece clamping device, a polishing tank device, a feeding device and a power device; The workpiece clamping device comprises a string shaft (1), an isolation sleeve (2) and a workpiece pressing block (3), one end of the string shaft (1) is provided with a limiting portion (101), and the other end is provided with a thread for mounting the workpiece pressing block (3), and the isolation sleeve (2) can be sleeved on the string shaft (1); The polishing tank device comprises a rack (4) and a polishing tank (5) arranged on the rack (4), a brush roller (6) is arranged in the polishing tank (5), and bristles are arranged on the brush roller (6); the brush roller (6) can be driven to rotate by the power device; The feeding device comprises a string shaft support (7) for mounting the string shaft (1), the string shaft support (7) is arranged above the polishing tank (5) and can be driven to move reciprocatingly by the power device; the moving direction of the string shaft support (7) is perpendicular to the axis of the brush roller (6); A guide column (8) is arranged above the polishing tank (5), and the string shaft support (7) is slidably connected with the guide column (8) through a linear bearing (9); The string shaft support (7) comprises a frame-shaped body (701), mounting grooves (702) and pressing shaft blocks (703); a pair of mounting grooves (702) for mounting the string shaft (1) are arranged on the two sides of the frame-shaped body (701); correspondingly, the two sides of the frame-shaped body (701) are also provided with pressing shaft blocks (703) for positioning the string shaft (1); the two ends of the string shaft (1) are square-shaped, after mounting, the two ends of the string shaft (1) are located in the mounting grooves (702) and are pressed by the pressing shaft blocks (703), so that detachable fixed mounting is realized; The power device comprises a motor (10) and a reciprocating mechanism (11); the reciprocating mechanism (11) comprises a moving frame (1101) which can move in the horizontal direction relative to the rack (4), and a sector gear (1102) for driving the moving frame (1101) to move reciprocatingly; the moving frame (1101) has two racks for engaging with the sector gear (1102), and the two racks are respectively located on the upper and lower sides of the sector gear (1102), and the sector gear (1102) only engages with one of the two racks during rotation, and when the sector gear (1102) is disengaged from one of the two racks, the sector gear (1102) is engaged with the other rack; the motor (10) is in transmission connection with the rotating shaft of the brush roller (6) and the rotating shaft of the sector gear (1102); the frame-shaped body (701) is fixedly connected with the moving frame (1101).

2. The brush-assisted force rheology based bezel corner polishing apparatus of claim 1, wherein: A drain port is arranged at the bottom of the polishing tank (5), and a detachable plug (501) is arranged in the drain port.

3. The brush-assisted force rheology based bezel corner polishing apparatus of claim 1, wherein: The mounting grooves (702) and the pressing shaft blocks (703) are arranged on the frame-shaped body (701) through an adjusting plate (704); the adjusting plate (704) can adjust the height.

4. The brush-assisted force rheology based bezel corner polishing apparatus of claim 3, wherein: The adjusting plate (704) is fixed on the frame-shaped body (701) through a locking bolt passing through a long waist hole.

5. The brush-assisted force flow rheology based edge polishing apparatus for watch cases according to any of claims 1-4, characterized in that: The frame-shaped body (701) is further provided with an ear (705), an adjusting stud (706) is arranged on the ear (705), and the adjusting stud (706) is connected with the adjusting plate (704) through a screw pair.

6. The brush-assisted force rheology based bezel corner polishing apparatus of claim 5, wherein: The motor (10) is in transmission connection with the sector gear (1102) through a belt transmission mechanism (13).

7. A method of polishing the edges of a watch case based on the rheology of the brush-assisted force, characterized in that: The edge and corner of the watch case is polished by the watch case edge and corner polishing device of claim 1, and the steps are as follows: Step one, the spacer sleeve (2) and the workpiece (12) are alternately loaded on the string shaft (1) in sequence, the workpiece pressing block (3) is tightened, the workpiece (12) is fixed, and the string shaft (1) is installed on the string shaft support (7); Step two, the power flow variable polishing liquid is added in the polishing tank (5), the polishing liquid is higher than the surface of the workpiece (12) to be polished, the motor (10) is started, the brush roller (6) is driven to rotate, and the string shaft support (7) is driven to move linearly and reciprocally; Step three, after polishing reaches the set time, the power is turned off, the string shaft (1) is removed, then the string shaft (1) is turned over or rotated by 180 degrees, and is reinstalled on the string shaft support (7); Step four, the motor (10) is restarted, after polishing reaches the set time, the power is turned off, the workpiece (12) is taken out, and after cleaning, the workpiece (12) is stored.

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