High-precision positioning device for punching of aluminum alloy showing stand

Abstract

According to the high-precision positioning device for punching of the aluminum alloy showing stand, the high-precision positioning device is applied to the related technical field of positioning, a flat pressing plate and a force transmission foot are arranged in a matched mode, on one hand, edge positioning in the prior art is improved into large-area contact pressing positioning of the periphery of a drilled part, and then the positioning area is effectively increased; on the other hand, the levelness of the flat pressing plate can be effectively monitored when the aluminum alloy is pressed and positioned, then the situation that the aluminum alloy is punched under the condition that the aluminum alloy is not pressed and positioned locally or is stressed unevenly is effectively avoided, then the situation that the aluminum alloy shifts during punching is effectively avoided, and the punching quality of the aluminum alloy is improved. Therefore, the punching precision is effectively ensured; in addition, by means of the arrangement of the self-adaptive opening piece, when the temperature of the drilling position is too high, fixed-point cooling can be conducted, then the situation that the hole opening is deformed or thermally collapsed due to high temperature is effectively avoided, the drilling precision is further improved, and follow-up stable assembly is kept.

Description

Technical Field

[0001] A positioning device for punching, in particular, a high-precision positioning device for punching an aluminum alloy display rack applied to the related technical field of positioning. Background Art

[0002] Aluminum alloy display racks are mostly assembled from multiple aluminum alloy partitions, aluminum alloy support rods, aluminum alloy side plates, etc. Among them, the partitions and side plates need to be punched to meet different requirements.

[0003] When drilling the plates of existing aluminum alloy display racks, clamping positioning is often used. For example, a punching device for the production of aluminum alloy products disclosed in the Chinese patent specification with the publication number CN214640465U clamps the edge of the plate for positioning through two side clamping plates during punching and then drills. However, during drilling, since the pressing point is far from the drilled edge, the drilled part is prone to downward deformation due to the pressure of drilling. And during clamping, when the positioning force is too large, local stress concentration and deformation are likely to occur, while when the positioning force is too small, the stability of the aluminum alloy is insufficient, and the punching is prone to deviation during punching, affecting the punching accuracy, resulting in difficult assembly of the subsequent aluminum alloy rack during assembly, and even difficult to assemble smoothly. Summary of the Invention

[0004] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing positioning method affects the punching accuracy and is prone to local stress concentration and deformation of the aluminum alloy plate.

[0005] To solve the above problems, the present invention provides a high-precision positioning device for punching an aluminum alloy display rack, including a positioning unit fixedly connected to the outside of a lifting component for controlling punching and two installed at the bottom of the lifting component. The positioning unit includes a top plate with a control center, which is signal-connected to the control center. Four electric push rods are fixedly connected to the lower end of the top plate, and a force transmission foot is fixedly connected to the lower end of each of the four electric push rods. A flat pressing plate is fixedly connected among the four force transmission feet. A through hole for drilling is formed in the middle of the flat pressing plate, and the through hole for drilling is coaxially arranged with the drilling bit for punching.

[0006] A horizontal detection unit is arranged on the force transmission foot. The horizontal detection unit includes a lower convex hemisphere located at the lower end of the force transmission foot, an external display strip located at the position of the force transmission foot facing the axis of the through hole for drilling, and a drainage channel formed in the force transmission foot. The lower convex hemisphere is filled with colored liquid. The drainage channel includes a mushroom-shaped groove formed in the middle of the lower end of the force transmission foot and a guiding hole formed in the interior of the force transmission foot. The guiding hole communicates the mushroom-shaped groove and the external display strip, and the lower convex hemisphere is fixedly connected to the inner wall of the mouth of the mushroom-shaped groove.

[0007] In the high-precision positioning device for drilling holes in the above aluminum alloy display rack, through the combined setting of the flat pressing plate and the force transmission feet, on the one hand, the edge positioning in the prior art is improved to large-area contact pressing and positioning around the part to be drilled, thereby effectively increasing the positioning area and effectively avoiding the problem of aluminum alloy deformation during drilling. On the other hand, through the setting of the horizontal detection unit, the levelness of the flat pressing plate during the pressing and positioning of the aluminum alloy can be effectively monitored, thereby effectively avoiding the aluminum alloy from being drilled when it is not locally pressed and positioned or under uneven stress, and effectively avoiding the situation of aluminum alloy displacement during drilling, and effectively ensuring the drilling accuracy.

[0008] As a further improvement of the present application, the lower convex hemisphere is made of an elastic material, the outer display strip is made of a hard transparent material, and when the lower end of the lower convex hemisphere is horizontally extruded, the colored liquid fills the drainage channel and the outer display strip.

[0009] As a further improvement of the present application, the end of the force transmission foot facing the axis of the top plate is chamfered, and the inclination angle of the chamfer is 30-45°, and the chamfer is located above the connection between the flat pressing plate and the force transmission foot.

[0010] As a further improvement of the present application, the outer display strip is fixedly connected to the middle of the chamfer, color bands are coated at intervals on the chamfered surface of the chamfer, and the color bands are complementary colors to the color of the colored liquid.

[0011] As another improvement of the present application, an internal air cavity and an air release ring opening are drilled inside the flat pressing plate. The air release ring opening communicates with the internal air cavity and the through hole, and the three are coaxially arranged. A plurality of self-adaptive opening pieces are arranged inside the internal air cavity in an annular array. An air charging pipe is fixedly connected to the upper end of the flat pressing plate, and the air charging pipe communicates with the air release ring opening.

[0012] As a supplement to another improvement of the present application, the self-adaptive opening piece includes a fixed partition connected between the upper and lower inner walls of the air release ring opening and a flexible sealing piece fixedly connected to the outer end of the fixed partition. A plurality of flexible sealing pieces enclose a ring. The flexible sealing piece is made of a flexible sealing material, and a hard strip is fixedly connected to the end of the flexible sealing piece far from the fixed partition. Sliding balls are fixedly connected to the upper and lower ends of the hard strip, and the sliding balls are slidably connected to the corresponding inner walls of the air release ring opening.

[0013] As a supplement to another improvement of the present application, a lining net is fixedly embedded inside the flexible sealing piece. The lining net includes a temperature sensing wire horizontally fixedly embedded in the middle of the flexible sealing piece and vertical lining strips vertically fixedly embedded in the flexible sealing piece, and the plurality of vertical lining strips are evenly distributed.

[0014] As another improvement supplement of the present application, every two adjacent vertical lining strips are respectively located on the left and right sides of the temperature sensing wire, and the middle parts of the two vertical lining strips both bypass the temperature sensing wire. The temperature sensing wire is made of a two-way shape memory alloy material, and the critical temperature of the two-way shape memory alloy is 3-5 °C lower than the thermal deformation temperature of the aluminum alloy.

[0015] In summary, through the cooperative setting of the flat pressing plate and the force transmission feet, on the one hand, the edge positioning in the prior art is improved to the large-area contact pressing and positioning around the part to be drilled, thereby effectively increasing the positioning area and effectively avoiding the problem of aluminum alloy deformation during drilling. On the other hand, through the setting of the horizontal detection unit, the levelness of the flat pressing plate during the pressing and positioning of the aluminum alloy can be effectively monitored, thereby effectively avoiding the aluminum alloy from being drilled when it is not pressed and positioned locally or the force is uneven, and effectively avoiding the situation of aluminum alloy displacement during drilling, thereby effectively ensuring the drilling accuracy; in addition, with the setting of the adaptive opening piece, when the temperature at the drilling site is too high, fixed-point cooling can be carried out, thereby effectively avoiding the situation of deformation or thermal collapse at the hole opening due to high temperature, further improving the drilling accuracy and maintaining stable subsequent assembly. Brief Description of the Drawings

[0016] Figure 1 The top-view perspective view when the first embodiment of the present application is installed outside the drilling assembly;

[0017] Figure 2 The bottom-view perspective view when the first embodiment of the present application is installed outside the drilling assembly;

[0018] Figure 3 The perspective view of the first embodiment of the present application;

[0019] Figure 4 The perspective view of the first embodiment of the present application during drilling;

[0020] Figure 5 The perspective view of the force transmission feet of the first embodiment of the present application;

[0021] Figure 6 The cross-sectional view of the horizontal detection unit of the first embodiment of the present application;

[0022] Figure 7 The cross-sectional view of the horizontal detection unit of the first embodiment of the present application when the positioning unit is in smooth contact with the aluminum alloy plate;

[0023] Figure 8 The perspective view of the second embodiment of the present application;

[0024] Figure 9 The top-view cross-sectional view of the flat pressing plate part of the second embodiment of the present application;

[0025] Figure 10 Cross-sectional view of the middle part of the flat pressing plate in the second embodiment of the present application;

[0026] Figure 11 Front view of the adaptive opening piece in the second embodiment of the present application;

[0027] Figure 12 Side view cross-sectional view of the adaptive opening piece in the second embodiment of the present application;

[0028] Figure 13 Schematic diagram when the adaptive opening piece opens for fixed-point cooling when local overheating occurs due to drilling in the second embodiment of the present application;

[0029] Explanation of reference numerals in the figure:

[0030] 1 Roof plate, 2 Electric push rod, 3 Flat pressing plate, 301 Through-drilling hole, 302 Inner air cavity, 303 Air release ring opening, 4 Force transmission foot, 41 Lower convex hemisphere, 42 Outer exposed strip, 401 Mushroom-shaped groove, 402 Guide hole, 6 Inflatable tube, 7 Adaptive opening piece, 701 Sliding ball, 71 Fixed partition plate, 72 Flexible sealing piece, 731 Vertical lining strip, 732 Temperature sensing wire. Specific implementation mode

[0031] The following will describe the two embodiments of the present application in detail with reference to the accompanying drawings.

[0032] The first embodiment:

[0033] Figures 1-3 As shown, in the figure, a represents the lifting assembly for controlling drilling, and b represents the drill bit. A high-precision positioning device for drilling an aluminum alloy display rack includes a positioning unit fixedly connected to the outside of the lifting assembly for controlling drilling and two 5s installed at the bottom of the lifting assembly. The positioning unit includes a roof plate 1 with a control center, and 5 is signal-connected to the control center. Four electric push rods 2 are fixedly connected to the lower end of the roof plate 1, and the lower ends of the four electric push rods 2 are all fixedly connected to force transmission feet 4. A flat pressing plate 3 is fixedly connected among the four force transmission feet 4. The lower ends of the flat pressing plate 3 and the force transmission feet 4 are flush with each other. A through-drilling hole 301 is drilled in the middle of the flat pressing plate 3, and the through-drilling hole 301 is coaxially arranged with the drill bit for drilling. By the cooperation of the flat pressing plate 3 and the force transmission feet 4, the edge positioning in the prior art is improved to the large-area contact and pressing positioning of the periphery of the part to be drilled, thereby effectively increasing the positioning area and effectively avoiding the problem of aluminum alloy deformation during drilling.

[0034] It should be noted that when drilling is not performed, the plurality of force transmission feet 4 and the flat pressing plate 3 are controlled to be located below the drill bit, so that each time drilling is performed, such as Figure 4, when the lifting assembly drives the drill to move downward, the flat pressing plate 3 and the force transmission feet 4 will first contact the aluminum alloy plate and exert extrusion positioning on it, and then the drill bit will reach the aluminum alloy to perform drilling operations, combining the positioning and drilling operations into one, effectively improving the drilling efficiency.

[0035] A horizontal detection unit is provided on the force transmission foot 4. The horizontal detection unit includes a lower convex hemisphere 41 located at the lower end of the force transmission foot 4, an external display strip 42 located at the position of the force transmission foot 4 facing the axis of the through hole 301, and a drainage channel dug inside the force transmission foot 4. The lower convex hemisphere 41 is filled with a colored liquid. The drainage channel includes a mushroom-shaped groove 401 dug in the middle of the lower end of the force transmission foot 4 and a guiding hole 402 dug inside the force transmission foot 4. The guiding hole 402 communicates with the mushroom-shaped groove 401 and the external display strip 42. The lower convex hemisphere 41 is fixedly connected to the inner wall of the mouth of the mushroom-shaped groove 401. Through the setting of the horizontal detection unit, the levelness of the flat pressing plate 3 during the pressing and positioning of the aluminum alloy can be effectively monitored, thereby effectively avoiding the aluminum alloy from being drilled when it is not locally pressed and positioned or the force is uneven, and further effectively avoiding the displacement of the aluminum alloy during drilling, and further effectively ensuring the drilling accuracy.

[0036] The lower convex hemisphere 41 is made of an elastic material, and the external display strip 42 is made of a hard transparent material. When the lower end of the lower convex hemisphere 41 is horizontally extruded, the colored liquid fills the drainage channel and the external display strip 42. During drilling, the flat pressing plate 3 and the force transmission feet 4 first approach the aluminum alloy plate. At this time, the lower convex hemispheres 41 under multiple force transmission feet 4 are simultaneously stressed and deformed. With sufficient contact with the aluminum alloy plate, multiple lower convex hemispheres 41 are completely embedded in the mushroom-shaped groove 401. At this time, the colored liquid inside will flow into the external display strip 42 and present a color column phenomenon in the external display strip 42. At this time, the image information of the color columns of multiple external display strips 42 can be obtained, and then its span can be analyzed. According to the consistency of the color column spans on multiple force transmission feet 4, it is convenient to timely analyze whether the pressing force of the flat pressing plate 3 on the aluminum alloy plate is uniform. When the levelness of the flat pressing plate 3 has a certain loss, the four lower convex hemispheres 41 will not be stressed simultaneously, resulting in asynchronous changes in the color columns on the external display strip 42, which is convenient for the staff to repair in time. Further, it effectively avoids the occurrence of continued drilling in the case of abnormal positioning devices, reducing the offset phenomenon caused by insufficient fixation and uneven force of the aluminum alloy plate, thereby effectively ensuring the drilling accuracy.

[0037] The force transmission foot 4 is chamfered at one end toward the axis of the top plate 1, and the inclination angle of the chamfer is 30-45°. The chamfer makes the external display strip 42 thereon have a height difference between the upper and lower parts, and also facilitates 5 to obtain its more positive image information, thereby effectively ensuring the accuracy of the image information and reducing the error. The chamfer is located above the connection between the flat pressing plate 3 and the force transmission foot 4, and the external display strip 42 is fixedly connected to the middle of the chamfer. The cross-section of the chamfer is coated with color strips at intervals, and the color of the color strips and the color liquid are contrasting colors, which are mainly used for contrasting color columns, so as to facilitate the analysis of the differences in color columns on multiple external display strips 42, so that the detection effect of whether the aluminum alloy plate is uniformly stressed is better.

[0038] In summary, by coordinating the flat pressing plate 3 and the force transmission foot 4, on the one hand, the edge positioning in the prior art is improved to a large-area contact pressing positioning around the drilled part, thereby effectively increasing the positioning area, thereby effectively avoiding the problem of deformation of the aluminum alloy during drilling; on the other hand, by setting the horizontal detection unit, the horizontality of the flat pressing plate 3 when the aluminum alloy is pressed and positioned can be effectively monitored, thereby effectively avoiding the aluminum alloy from being punched when it is partially not pressed and positioned or subjected to uneven force, thereby effectively avoiding the displacement of the aluminum alloy during drilling, thereby effectively ensuring the drilling accuracy; in addition, by coordinating the adaptive opening plate 7, when the temperature at the drilling site is too high, fixed-point cooling can be performed, thereby effectively avoiding deformation or thermal collapse of the hole mouth due to high temperature, further improving the drilling accuracy, and maintaining subsequent stable assembly.

[0039] The second implementation method:

[0040] Based on the first embodiment, this embodiment adds structures and functions related to fixed-point cooling, and the rest of the embodiments remain the same as the first embodiment.

[0041] Figures 8-10 As shown, an inner air cavity 302 and a venting ring 303 are excavated inside the flat plate 3, the venting ring 303 is connected to the inner air cavity 302 and the through-drilling hole 301, and the three are coaxially arranged, a plurality of adaptive opening pieces 7 distributed in a circular array are arranged inside the inner air cavity 302, an inflation tube 6 is fixedly connected to the upper end of the flat plate 3, the inflation tube 6 is communicated with the venting ring 303, and the adaptive opening piece 7 has a temperature sensing function. When drilling, if local overheating occurs, resulting in collapse and deformation around the hole on the aluminum alloy, etc. Figure 13 , the corresponding adaptive opening piece 7 automatically shrinks and opens. At this time, the control center can control the inflation tube 6 to continuously fill the inner air cavity 302 with low-temperature gas. The low-temperature gas can overflow along the shrinking and opened adaptive opening piece 7, thereby directly acting on the drilled part of the aluminum alloy, thereby achieving targeted cooling, thereby effectively inhibiting the deformation and collapse caused by excessive heat accumulation at this place, and effectively ensuring the drilling quality.

[0042] As Figure 11 , the adaptive opening piece 7 includes a fixed partition 71 fixedly connected between the upper and lower inner walls of the air release ring opening 303 and a flexible sealing piece 72 fixedly connected to the outer end of the fixed partition 71. A plurality of flexible sealing pieces 72 are arranged in a ring shape. The flexible sealing piece 72 is made of a flexible sealing material, and a hard strip is fixedly connected to the end of the flexible sealing piece 72 away from the fixed partition 71. Sliding balls 701 are fixedly connected to both the upper and lower ends of the hard strip. The sliding balls 701 are slidably connected to the corresponding inner walls of the air release ring opening 303. A lining net is fixedly embedded inside the flexible sealing piece 72. The lining net includes a temperature-sensitive wire 732 fixedly embedded transversely in the middle of the flexible sealing piece 72 and vertical lining strips 731 fixedly embedded longitudinally in the flexible sealing piece 72, and a plurality of vertical lining strips 731 are evenly distributed. When the temperature is higher than the critical temperature of the temperature-sensitive wire 732, it will shrink, and then the flexible sealing piece 72 will shrink accordingly. As the temperature is lower than the critical temperature, it will return to its original state. Under the restriction of the sliding balls 701, the flexible sealing piece 72 can expand and contract relatively regularly along the upper and lower inner walls of the air release ring opening 303, so that under normal circumstances, the low-temperature gas in the air release ring opening 303 is not likely to overflow, effectively avoiding the loss of cold quantity.

[0043] As Figure 12 , each adjacent two vertical lining strips 731 are respectively located on the left and right sides of the temperature-sensitive wire 732, and the middle parts of the two vertical lining strips 731 both bypass the temperature-sensitive wire 732, making the overall structure of the lining net relatively stable. And when the temperature-sensitive wire 732 shrinks, it can better transmit force to the vertical lining strips 731, so that a plurality of vertical lining strips 731 slide along the upper and lower inner walls of the air release ring opening 303 accordingly, making the expansion and contraction of the adaptive opening piece 7 smoother.

[0044] The temperature-sensitive wire 732 is made of a two-way shape memory alloy material. The critical temperature of the two-way shape memory alloy is 3-5°C lower than the thermal deformation temperature of the aluminum alloy, so that before the aluminum alloy has time to deform, the temperature-sensitive wire 732 is triggered to shrink. At this time, the low-temperature gas can be ejected towards the drilled place, thereby realizing fixed-point cooling, and effectively ensuring the stability and accuracy during drilling, and it is not easy to occur the situations of hole deviation and irregular edges.

[0045] During each drilling, low-temperature gas can be filled into the air release ring opening 303 through the gas filling pipe 6, which can cool the surrounding of the drilled aluminum alloy, thereby suppressing the probability of thermal deformation of the aluminum alloy. When overheating still occurs and the adaptive opening piece 7 shrinks, the gas inside it can quickly overflow towards the drilled place to realize fixed-point cooling.

[0046] Combined with the current actual needs, the above implementation manner adopted in this application, the protection scope is not limited to this. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A high-precision positioning device for punching holes in an aluminum alloy display rack, characterized in that: It includes a positioning unit fixedly connected outside the lifting component for controlling drilling and two (5) installed at the bottom of the lifting component. The positioning unit includes a top plate (1) with a control center. The (5) is signal-connected to the control center. Four electric push rods (2) are fixedly connected to the lower end of the top plate (1). The lower ends of the four electric push rods (2) are all fixedly connected with force-transmitting feet (4). A flat pressing plate (3) is fixedly connected among the four force-transmitting feet (4). A through-hole (301) is drilled in the middle of the flat pressing plate (3). The through-hole (301) is coaxially arranged with the drill bit for drilling. A horizontal detection unit is arranged on the force-transmitting foot (4). The horizontal detection unit includes a lower convex hemisphere (41) located at the lower end of the force-transmitting foot (4), an exposed strip (42) located at the axis of the through-hole (301) of the force-transmitting foot (4), and a drainage channel drilled in the force-transmitting foot (4). The lower convex hemisphere (41) is filled with colored liquid. The drainage channel includes a mushroom-shaped groove (401) drilled in the middle of the lower end of the force-transmitting foot (4) and a guiding hole (402) drilled inside the force-transmitting foot (4). The guiding hole (402) communicates the mushroom-shaped groove (401) and the exposed strip (42). The lower convex hemisphere (41) is fixedly connected to the inner wall of the mouth of the mushroom-shaped groove (401).

2. The high-precision positioning device for punching an aluminum alloy display rack according to claim 1, characterized in that: The lower convex hemisphere (41) is made of elastic material, and the exposed strip (42) is made of hard transparent material. When the lower end of the lower convex hemisphere (41) is horizontally squeezed, the colored liquid fills the drainage channel and the exposed strip (42).

3. A high-precision positioning device for punching an aluminum alloy display rack according to claim 1, characterized in that: One end of the force-transmitting foot (4) facing the axis of the top plate (1) is chamfered, and the inclination angle of the chamfer is 30 - 45°, and the chamfer is above the connection between the flat pressing plate (3) and the force-transmitting foot (4).

4. The high-precision positioning device for punching an aluminum alloy display rack according to claim 3, wherein: The exposed strip (42) is fixedly connected to the middle of the chamfer. Color bands are coated at intervals on the chamfered surface of the chamfer, and the color bands are complementary colors to the color of the colored liquid.

5. The high-precision positioning device for punching an aluminum alloy display rack according to claim 1, wherein: An inner air cavity (302) and an air release ring opening (303) are drilled inside the flat pressing plate (3). The air release ring opening (303) communicates the inner air cavity (302) and the through-hole (301), and the three are coaxially arranged. A plurality of self-adaptive opening pieces (7) distributed in an annular array are arranged inside the inner air cavity (302). An air charging pipe (6) is fixedly connected to the upper end of the flat pressing plate (3). The air charging pipe (6) communicates with the air release ring opening (303).

6. The high-precision positioning device for punching an aluminum alloy display rack according to claim 5, wherein: The self-adaptive opening piece (7) includes a fixed partition plate (71) fixedly connected between the upper and lower inner walls of the air release ring opening (303) and a flexible sealing piece (72) fixedly connected to the outer end of the fixed partition plate (71). A plurality of the flexible sealing pieces (72) surround an annular shape. The flexible sealing piece (72) is made of flexible sealing material, and a hard strip is fixedly connected to the end of the flexible sealing piece (72) away from the fixed partition plate (71). Sliding balls (701) are fixedly connected to the upper and lower ends of the hard strip. The sliding balls (701) are slidably connected to the corresponding inner walls of the air release ring opening (303).

7. A high-precision positioning device for punching an aluminum alloy display rack according to claim 6, characterized in that: A lining net is fixedly inlaid inside the flexible sealing sheet (72). The lining net includes a temperature sensing wire (732) fixedly inlaid transversely in the middle of the flexible sealing sheet (72) and vertical lining strips (731) fixedly inlaid longitudinally in the flexible sealing sheet (72), and a plurality of vertical lining strips (731) are evenly distributed.

8. The high-precision positioning device for punching an aluminum alloy display rack according to claim 7, wherein: Each adjacent two of the vertical lining strips (731) are respectively located on the left and right sides of the temperature sensing wire (732), and the middle parts of the two vertical lining strips (731) bypass the temperature sensing wire (732). The temperature sensing wire (732) is made of a two-way shape memory alloy material, and the critical temperature of the two-way shape memory alloy is 3-5 °C lower than the thermal deformation temperature of the aluminum alloy.

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