A polishing device for display screen shell production

Abstract

The utility model relates to the technical field of polishing equipment, concretely is a kind of polishing device for display screen shell production. Device includes table, Y axis displacement device, X axis displacement device, Z axis displacement device, cylindrical polishing head and four groups of positioning cylinder;Rotary roller and polishing belt (upper surface flush with table) are equipped in the notch of table, Y axis is two groups of synchronous conveyer belt device, X axis, Z axis all adopt screw rod, three are equipped with lead rod auxiliary movement, and positioning cylinder can realize inside and outside two-way positioning with support plate. Device can process the inner and outer surfaces and upper and lower surfaces of display screen shell, is suitable for strong universality, positioning error is low, polishing efficiency is high, satisfies high-precision, high-efficiency production demand.

Description

Technical Field

[0001] This utility model relates to the technical field of polishing equipment, specifically a polishing device for producing display screen casings. Background Technology

[0002] With the rapid iteration of the electronic information industry, the market size of display screens has gradually increased. The functional positioning of display screen casings has shifted from a single demand to a multi-dimensional demand: On the one hand, most display screen casings are box-shaped, with relatively flat bottom and sides. Consumers have increasingly higher requirements for the exquisite appearance of these casings, such as low surface roughness and low corner radius error to ensure a beautiful appearance; on the other hand, as display screens develop towards "thinner and larger sizes," the casing material has also gradually upgraded from early ABS plastic to lightweight metal materials such as aluminum alloy and magnesium alloy. Although these metal materials have advantages such as high strength and high heat dissipation, after stamping and injection molding, burrs, flash, and processing marks are easily generated on the surface, which need to be eliminated through precision grinding. Otherwise, it will directly affect the exquisite appearance and subsequent processes such as spraying and assembly.

[0003] However, current grinding equipment in the industry still suffers from several pain points: First, in small and medium-sized production enterprises, manual grinding remains the mainstream method, with workers using handheld pneumatic grinders or sandpaper to treat the surface and edges of the casing. This is extremely inefficient, processing only a small number of products per day; furthermore, precision fluctuates greatly, grinding quality depends heavily on worker experience, and surface roughness is prone to "over-grinding" (localized depressions) or "under-grinding" (burr residue). Second, semi-automatic and fully automatic grinding equipment suffer from insufficient displacement dimensions and poor transmission synchronization. Most equipment only supports two-dimensional displacement along the X-axis (left-right) and Y-axis (front-back), with poor transmission synchronization. Some equipment uses two independent motors to drive the left and right conveyor belts for Y-axis displacement, which is prone to misalignment due to differences in motor speed. Additionally, the positioning mechanism lacks versatility; existing fixtures are mostly designed for "single-size adaptation," requiring disassembly and replacement of the entire fixture set when changing to different casing sizes, severely impacting production continuity. Finally, work efficiency is low; existing equipment only uses the grinding head, which cannot handle large flat areas, such as the smooth underside of a casing, resulting in extremely limited efficiency.

[0004] In summary, current display screen casing polishing equipment can no longer meet the industry's development needs. There is an urgent need for a new polishing device with "high-precision polishing, multi-dimensional synchronous displacement, high adaptability, and high efficiency" to solve the pain points of existing technologies and promote the automation and precision upgrade of display screen casing production. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a grinding device for manufacturing display screen housings, which solves the problems mentioned in the background section. Technical solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a grinding device for producing display screen casings, comprising a table, a Y-axis displacement device, an X-axis displacement device, a Z-axis displacement device, a cylindrical grinding head, and a positioning cylinder; characterized in that: the upper surface of the table has a through-hole, and several rotating rollers along the front-back direction are evenly arranged within the hole, with a grinding belt connected to each of the rotating rollers; the Y-axis displacement device consists of two sets, symmetrically arranged on both sides of the hole on the upper surface of the table, each set having a conveyor belt device along the front-back direction; the X-axis displacement device is simultaneously fixed to both conveyor belt devices. The X-axis displacement device is equipped with a lead screw A along the left-right direction, and a matching nut block A is provided on the lead screw A, forming a lead screw and nut structure; the Z-axis displacement device is fixed on the nut block A, and a lead screw B along the up-down direction is provided on the lead screw B, and a matching nut block B is provided on the lead screw B; a servo motor E is fixed on the nut block B along the vertical direction, and the grinding head is fixed on the output shaft of the servo motor E; there are four positioning cylinders, which are symmetrically arranged around the notch on the upper surface of the table, and a support plate is vertically fixed on the output shaft of each positioning cylinder.

[0007] Preferably, one of the rotating rollers is connected to a servo motor; the upper surface of the polishing belt is flush with the upper surface of the tabletop.

[0008] Preferably, the two drive wheels of the two sets of conveyor belt devices are simultaneously connected to a transmission rod in the left-right direction, and the transmission rod is connected to a servo motor B.

[0009] Preferably, the conveyor belt device has two guide rods symmetrically arranged on the upper and lower sides, and the two guide rods are simultaneously connected to the X-axis displacement device.

[0010] Preferably, the lead screw A is connected to a servo motor C, and two lead rods are symmetrically arranged on the upper and lower sides of the lead screw A, with both lead rods connected to the nut block A.

[0011] Preferably, the lead screw B is connected to a servo motor D, and two lead rods are symmetrically arranged on the left and right sides of the lead screw B, with both lead rods connected to the nut block B.

[0012] This utility model provides a grinding device for manufacturing display screen housings, which has the following advantages: 1. Four sets of symmetrically arranged positioning cylinders, together with the support plate, can achieve rigid positioning in both internal and external directions, effectively avoiding shell displacement during the grinding process and ensuring grinding accuracy.

[0013] 2. Multi-axis collaborative transmission enables grinding of the entire area without dead angles. The Y-axis displacement device achieves synchronous operation of two sets of conveyor belts through "transmission rod + servo motor B". The X-axis and Z-axis displacement devices adopt lead screw transmission, combined with the guide limit of the lead rod, so that the displacement accuracy of the grinding head in the XYZ three-dimensional space is extremely high, which can accurately cover any area of ​​the shell to be ground.

[0014] 3. The grinding function of the grinding belt on the lower surface complements the local grinding function of the grinding head, completing the comprehensive grinding of the inner, outer, upper and lower surfaces of the shell. This not only improves efficiency, but also significantly enhances the uniformity of the surface roughness of the shell after grinding, resulting in a substantial improvement in quality consistency.

[0015] 4. Highly adaptable design meets the needs of rapid switching between multiple specifications. The four positioning cylinders are independently controlled, and the distance between the support plates can be changed by adjusting the stroke of the cylinder output shaft. It can adapt to display screen shells of different sizes and shapes within a certain range, without the need to disassemble and replace fixtures as in traditional equipment, which greatly improves production continuity. The equipment has strong versatility and can effectively reduce the equipment investment costs for enterprises for multiple specifications of products and improve equipment utilization. Attached Figure Description

[0016] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model; Figure 2 This is the second three-dimensional structural schematic diagram of the present invention; Figure 3 for Figure 2 The main view; Figure 4 for Figure 3 Top view; Figure 5 for Figure 4 Sectional view of AA; Figure 6 for Figure 4 BB section view; Figure 7 for Figure 4 CC section view; Figure 8 for Figure 4 DD section view; Figure 9 This is a top view of the structure of the present invention in another working state; Figure 10 for Figure 9 EE section view; In the diagram: 1. Table; 101. Rotating roller; 102. Grinding belt; 103. Servo motor A; 2. Y-axis displacement device; 201. Conveyor belt device; 202. Drive wheel; 203. Transmission rod; 204. Servo motor B; 205. Transmission belt; 3. X-axis displacement device; 301. Lead screw A; 302. Nut block A; 303. Servo motor C; 304. Connecting block; 4. Z-axis displacement device; 401. Lead screw B; 402. Nut block B; 403. Servo motor D; 404. Servo motor E; 5. Grinding head; 6. Positioning cylinder; 601. Support plate; 7. Lead rod; 8. Display screen housing. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] In this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0019] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0020] Example 1: Please refer to Figures 1 to 10 A polishing device for producing display screen housings includes a table (1), a Y-axis displacement device (2), an X-axis displacement device (3), a Z-axis displacement device (4), a cylindrical polishing head (5), and a positioning cylinder (6). The table (1) has a through notch on its upper surface, and several rotating rollers (101) are evenly arranged in the notch through bearing components. A polishing belt (102) is connected to the several rotating rollers (101). The Y-axis displacement device (2) consists of two sets, both of which are symmetrically arranged on both sides of the notch on the upper surface of the table (1) through vertical fixing plates. Each set is equipped with a conveyor belt device (201) in the front-back direction. The X-axis displacement device (3) is simultaneously fixed on the transmission belts (205) of two conveyor belt devices (201). More specifically, the X-axis displacement device (3) is provided with a gantry frame, and two connecting blocks (304) are symmetrically provided on the left and right sides of the gantry frame. The connecting blocks (304) are fixed on the transmission belts (205) of the conveyor belt devices (201). The X-axis displacement device (3) is provided with a lead screw (301) in the left-right direction (at the top of the gantry frame). The lead screw (301) is provided with a matching nut block (302) and the two form a lead screw and nut structure. The Z-axis displacement device The device (4) is fixed on the nut block A (302), which is provided with a lead screw B (401) in the vertical direction. The lead screw B (401) is provided with a matching nut block B (402). The nut block B (402) is fixed with a servo motor E (404) in the vertical direction. The grinding head (5) is fixed on the output shaft of the servo motor E (404). There are four positioning cylinders (6), which are independently controlled and are symmetrically arranged around the notch on the upper surface of the table (1). Each positioning cylinder (6) has a support plate (601) vertically fixed on its output shaft.

[0021] One of the rotating rollers (101) is connected to a servo motor A (103), which is fixed to the front of the table (1); the upper surface of the polishing belt (102) is flush with the upper surface of the table (1).

[0022] The two drive wheels (202) of the two sets of conveyor belt devices (201) are simultaneously connected to a transmission rod (203) in the left-right direction. The transmission rod (203) is connected to a servo motor B (204). Both the transmission rod (203) and the servo motor B (204) are mounted on the front of the upper surface of the table (1) through a vertical fixing plate. By using the driving method of "servo motor B (204) + transmission rod (203)," it can be ensured that the two sets of conveyor belt devices (201) operate synchronously with a single drive source, avoiding the offset of the X-axis displacement device (3) caused by the speed difference in traditional dual-motor drive, and the synchronization error is low.

[0023] The conveyor belt device (201) is symmetrically provided with two guide rods (7) along the front-back direction on the upper and lower sides. The two guide rods (7) are simultaneously connected to the X-axis displacement device (3) (specifically on the connecting block (304) and the two form a sliding structure).

[0024] The lead screw A (301) is connected to a servo motor C (303). The lead screw A (301) is symmetrically provided with two guide rods (7) along the left and right directions on the upper and lower sides. The two guide rods (7) are connected to the nut block A (302) and the two form a sliding structure. The servo motor C (303), lead screw A (301) and guide rods (7) are all located on the top of the gantry frame.

[0025] The lead screw B (401) is connected to the servo motor D (403). Two lead rods (7) are symmetrically arranged on the left and right sides of the lead screw B (401) along the up and down direction. The two lead rods (7) are connected to the nut block B (402) and the two form a sliding structure. The servo motor D (403), the lead screw B (401) and the lead rods (7) are all set on the nut block A (302).

[0026] Place the display screen housing (8) bottom down on the grinding belt (102) of the table (1), ensuring that the center of the housing (8) is aligned with the center of the notch in the table (1). Then, activate the four sets of positioning cylinders (6). The cylinder output shaft pushes the support plate (601) to press against the four sides of the housing (8). Through the control of the cylinders and the uniform force of the support plate (601), rigid positioning is achieved with low positioning error, avoiding subsequent grinding deviation. Servo motor A (103) is started, driving the connected rotating roller (101) to rotate. The rotating roller (101) drives the other rotating rollers (101) and the grinding belt (102) to rotate synchronously. The upper surface of the grinding belt (102) is in close contact with the lower surface of the shell (8), and large-area flat grinding of the lower surface of the shell begins. At the same time, servo motor B (204) is started, driving the drive wheels (202) of the two sets of conveyor belt devices (201) to rotate synchronously through the transmission rod (203). The conveyor belt (205) drives the gantry frame of the X-axis displacement device (3) to move along the Y-axis direction (back and forth). Servo motor C (303) is started, driving the lead screw A (301) to rotate. The lead screw A (301) drives the nut block A (302) and the Z-axis displacement device (4) to move along the X-axis direction (back and forth). Move along the Z-axis (left and right); start servo motor D (403), servo motor D (403) drives lead screw B (401) to rotate, lead screw B (401) drives nut block B (402), servo motor E (404) and grinding head (5) to move up and down along the Z-axis, the three cooperate to make grinding head (5) contact the surface to be ground on the display shell (8); start servo motor E (404), servo motor E (404) drives grinding head (5) to rotate, then control the X-axis, Y-axis and Z-axis displacement devices to work together, so that grinding head (5) can accurately grind the inside and upper surface of display shell (8), the three cooperate to make grinding head (5) make corresponding movements according to the shape of the grinding position, complete the corresponding trajectory movement, such as linear displacement grinding, arc displacement grinding, etc., and the grinding belt (102) simultaneously completes the grinding of the lower surface. Figure 2-8 As shown.

[0027] Flip the display casing (8) so that the original top surface is facing down. Then, place the flipped display casing (8) back onto the polishing belt (102) and start the positioning cylinder (6) again to clamp the four sets of support plates (601) from the four sides inside the casing (8) to ensure that the casing (8) does not shift during polishing. Then repeat the above X-axis, Y-axis, and Z-axis displacement adjustment steps: start servo motor B (204), servo motor C (303), and servo motor D (403) to adjust the positions of the Y-axis displacement device (2), X-axis displacement device (3), and Z-axis displacement device (4) respectively, so that the polishing head (5) is aligned with the four external sides of the display casing (8); start servo motor E (404) to drive the polishing head (5) to rotate at high speed and focus on polishing the side areas of the display casing (8) to ensure that the side surface is smooth and flawless. Figure 9-10 As shown.

[0028] The sliding fit of the guide rod (7) can limit the swaying of the relevant displacement device during the movement process and improve the displacement stability.

[0029] Working process: Place the display screen housing (8) to be polished with its bottom facing down on the polishing belt (102) of the table (1). Use visual positioning assistance (or manual calibration) to ensure that the center of the housing (8) is aligned with the center of the notch on the table (1). Start the four sets of positioning cylinders (6), extend the cylinder output shaft, and push the support plate (601) to move to the four sides of the housing (8) until the support plate (601) is in close contact with the surface of the housing (8). Confirm that the positioning is completed and enter the polishing standby state.

[0030] Start the servo motor A (103), which drives the connected rotating roller (101) to rotate. The rotating roller (101) drives the other rotating rollers and the grinding belt (102) to rotate synchronously through friction. The upper surface of the grinding belt (102) is in close contact with the lower surface of the outer shell (8) and enters the lower surface for grinding. Start servo motor B (204), which drives transmission rod (203) to rotate. Transmission rod (203) synchronously drives the drive wheels (202) of two sets of conveyor belt devices (201) to rotate. Conveyor belt (205) drives the gantry frame of X-axis displacement device (3) to move along the Y-axis direction (back and forth). Start servo motor C (303), which drives lead screw A (301) to rotate. Lead screw A (301) drives nut block A (302) and Z-axis displacement device (4) to move along the X-axis direction (left and right). Start servo motor D (403), which drives lead screw B (401) to rotate. Lead screw B (401) drives nut block B (402), servo motor E (404), and grinding head (5) to move along the Z-axis direction (left and right). Move along the axis (up and down); start the servo motor E (404), the servo motor E (404) drives the grinding head (5) to rotate, and then control the rotation speed of the servo motor B (204), servo motor C (303) and servo motor D (403) to control the coordinated action of the X-axis, Y-axis and Z-axis displacement devices, so that the grinding head (5) grinds the inner surface and upper surface of the outer shell (8), and the grinding belt (102) grinds the lower surface of the outer shell (8) simultaneously.

[0031] Turn off all the above servo motors; start the positioning cylinder (6) to retract the cylinder output shaft and return the support plate (601) to its original position; manually or with a robotic arm, grab the display screen housing (8) and rotate it 180° so that the original upper surface is facing down; start the four sets of positioning cylinders (6) and extend the cylinder output shaft to clamp the support plate (601) from the four sides inside the housing (8). Then repeat the grinding head (5) position adjustment process in step 4 above: start servo motor B (204), servo motor C (303), and servo motor D (403) to adjust the X-axis, Y-axis, and Z-axis displacement devices; start servo motor E (404) to drive the grinding head (5) to rotate so that the grinding head (5) is aligned with the four sides of the outer surface of the housing (8) to ensure that the side surface is smooth.

[0032] Turn off all servo motors and start the positioning cylinder (6). The support plate (601) returns to its original position. The polished display screen shell (8) is removed manually or by a robotic arm to complete one polishing cycle. Finally, the dust remaining on the surface of the polishing belt (102) is cleaned, the equipment is reset, and the next work cycle begins.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A grinding device for manufacturing display screen housings, comprising a table (1), a Y-axis displacement device (2), an X-axis displacement device (3), a Z-axis displacement device (4), a cylindrical grinding head (5), and a positioning cylinder (6); characterized in that: The table (1) has a through notch on its upper surface, and several rotating rollers (101) are evenly arranged in the notch along the front-back direction. A grinding belt (102) is connected to the several rotating rollers (101). The Y-axis displacement device (2) consists of two sets, which are symmetrically arranged on both sides of the notch on the upper surface of the table (1). Each set is equipped with a conveyor belt device (201) along the front-back direction. The X-axis displacement device (3) is fixed on both conveyor belt devices (201). The X-axis displacement device (3) is equipped with a lead screw (301) along the left-right direction. The lead screw (301) is equipped with a matching nut block (302). The two form a screw and nut structure; the Z-axis displacement device (4) is fixed on the nut block A (302), which is provided with a screw B (401) in the vertical direction, and a matching nut block B (402) is provided on the screw B (401); a servo motor E (404) is fixed on the nut block B (402) in the vertical direction, and the grinding head (5) is fixed on the output shaft of the servo motor E (404); there are four positioning cylinders (6), which are symmetrically arranged around the notch on the upper surface of the table (1), and a support plate (601) is vertically fixed on the output shaft of each positioning cylinder (6).

2. The polishing device for producing a display screen casing according to claim 1, characterized in that: One of the rotating rollers (101) is connected to a servo motor A (103); the upper surface of the polishing belt (102) is flush with the upper surface of the table (1).

3. The polishing device for producing a display screen casing according to claim 1, characterized in that: The two drive wheels (202) of the two sets of conveyor belt devices (201) are simultaneously connected to a transmission rod (203) in the left-right direction, and the transmission rod (203) is connected to a servo motor B (204).

4. The polishing device for producing a display screen casing according to claim 3, characterized in that: The conveyor belt device (201) is provided with two guide rods (7) symmetrically on the upper and lower sides, and the two guide rods (7) are connected to the X-axis displacement device (3) at the same time.

5. A polishing device for producing a display screen casing according to claim 1, characterized in that: The lead screw A (301) is connected to a servo motor C (303). Two lead rods (7) are symmetrically arranged on the upper and lower sides of the lead screw A (301), and the two lead rods (7) are connected to the nut block A (302) at the same time.

6. The polishing device for producing a display screen casing according to claim 1, characterized in that: The lead screw B (401) is connected to a servo motor D (403). Two lead rods (7) are symmetrically arranged on the left and right sides of the lead screw B (401), and the two lead rods (7) are connected to the nut block B (402) at the same time.

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