Precise grinding device for assembly hole of automobile injection molding part

Abstract

The invention provides an automobile injection molding part assembling hole precise grinding device which comprises a grinding rod, a round rod is fixedly arranged at the bottom end of the grinding rod, the top end of the grinding rod is rotationally sleeved with a first connecting disc through a bearing, and a driving mechanism is arranged above the grinding rod and used for driving the grinding rod to rotate; the two storage grooves are symmetrically formed in the peripheral wall of the round rod, polishing blocks are slidably arranged in the storage grooves, the upper end and the lower end of one side of each polishing block are arranged in an inclined plane shape, and two buffering mechanisms are arranged between the polishing blocks and used for injecting gas into the storage grooves correspondingly; and the monitoring mechanism I is arranged below the driving mechanism. The invention relates to the technical field of injection molding part assembling hole grinding devices. When the improved assembly hole polishing device is used, burrs on the inner ring edge or the chamfer face of the top end of an assembly hole, the inner wall of the assembly hole and the inner ring edge or the chamfer face of the bottom end of the assembly hole can be removed in sequence through rotation of the polishing rod, and the effect of removing the burrs on the assembly hole is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of injection molded part assembly hole polishing devices, and in particular relates to a precision polishing device for automobile injection molded part assembly holes. Background Art

[0002] Injection molding is a molding process widely used in the manufacturing industry, mainly used to produce plastic products. Its core principle is to inject molten plastic material into the mold cavity and obtain the desired shape of the product after cooling and solidification. In the automobile manufacturing process, some structural parts are generally made by injection molding. After the automobile injection molded parts are completed and finalized, there will often be a certain amount of burrs on their assembly holes. At this time, the burrs on the assembly holes are generally removed by a grinding device to ensure the quality of the automobile injection molded parts.

[0003] When using some existing automotive injection molding parts grinding devices, the inner wall of the assembly hole is generally polished and deburred by a rotating grinding rod. However, burrs may appear on the ring edges of the openings at both ends of the assembly hole or on the chamfered surfaces of the openings at both ends of the assembly hole. The rotating grinding rod makes it difficult to perform the grinding operation on the burrs on the open ring edges and chamfered surfaces, which affects the grinding effect of the assembly hole. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide a precision grinding device for the assembly holes of automobile injection molded parts, which can, through the rotation of the grinding rod, successively complete the removal of burrs on the inner ring edge or chamfered surface at the top of the assembly hole, the inner wall of the assembly hole, and the inner ring edge or chamfered surface at the bottom of the assembly hole, and the burr removal effect on the assembly hole is better.

[0005] In order to solve the above problems, the present invention provides a precision grinding device for assembly holes of automobile injection molded parts, comprising: a grinding rod, a round rod fixedly mounted on the bottom end of which, a connecting plate 1 is provided on the top end of which via a bearing rotation sleeve, and a driving mechanism is provided above the connecting plate for driving the grinding rod to rotate; Two storage tanks are symmetrically arranged on the outer peripheral wall of the round rod, and a grinding block is slidably installed in each of them. The upper and lower ends of one side of the grinding block are both inclined, and two buffer mechanisms are arranged between them for respectively injecting gas into the storage tank; A first monitoring mechanism is provided below the driving mechanism and is used to monitor the length of the grinding block extending from the storage tank; The second monitoring mechanism is arranged in the first connecting plate and is used to monitor the rotation angle of the grinding rod.

[0006] Furthermore, the diameter of the round rod is smaller than the diameter of the polishing rod, and the outer ring edge of the bottom end of the round rod is arranged in an arc shape.

[0007] Furthermore, a piston plate is fixedly mounted on the other side of the grinding block, and the outer peripheral wall of the piston plate is in contact with the inner wall of the corresponding storage tank.

[0008] Furthermore, a ball is rotatably mounted at the center of one side of the grinding block, and one end of the ball close to the outer peripheral wall of the grinding rod is coplanar with the outer peripheral wall of the grinding rod.

[0009] Furthermore, the monitoring mechanism includes an inner cavity, which is opened in the middle of the connecting disk, and the interior of the inner cavity is connected to the interior of the two storage tanks through a connecting hole. A plurality of air pressure detection sensors are provided in a circular array on the outer peripheral side of the top of the grinding rod, and the monitoring end of each air pressure detection sensor is inserted into the inner cavity and threadedly connected to the connecting disk.

[0010] Furthermore, the top of the polishing rod is in an I-shape when viewed from above, and a sealing ring is installed at a position corresponding to the polishing rod in the wall of the connecting disk 1, and the inner ring wall of the sealing ring contacts the outer peripheral wall of the polishing rod.

[0011] Furthermore, the second monitoring mechanism includes an infrared array sensor, which is fixedly mounted on the inner top wall of the inner cavity. A gradient reflector is fixedly mounted at the top end of the polishing rod at a position corresponding to the infrared array sensor, and both the infrared array sensor and the gradient reflector are arranged in a ring shape.

[0012] Furthermore, the driving mechanism includes a driver, which is arranged above the connecting disk 1, and the driving end of the driver is connected to the polishing rod through a connecting piece. The connecting disk 2 is fixedly installed on the outer shell of the bottom end of the driver, and the connecting disk 2 is fixedly connected to the connecting disk 1 through bolts.

[0013] Furthermore, the connecting part includes a fixed cylinder, the top of which is inserted into the connecting disk 2 and rotatably connected to the connecting disk 2 through a bearing, and the driving end of the driver is inserted into the connecting disk 2 and fixedly connected to the center position of the top end of the fixed cylinder, and a hexagonal rod is slidably installed in the fixed cylinder, and the bottom end of the hexagonal rod and the bottom end of the fixed cylinder are both in contact with the top side of the connecting disk 1, and the bottom end of the hexagonal rod is fixedly installed with a connecting shaft, and the bottom end of the connecting shaft is inserted into the inner cavity and fixedly connected to the center position of the top end of the polishing rod.

[0014] Furthermore, the top of the connecting hole is Y-shaped, and the two openings at the top of the connecting hole are both located on the outer peripheral side of the connecting shaft. The connecting shaft passes through the inner hole of the infrared array sensor and the inner hole of the gradient reflector and is gap-matched with the infrared array sensor and the gradient reflector. A sealing ring is installed at the position corresponding to the connecting shaft in the plate wall of the connecting disk 1, and the inner ring wall of the sealing ring is in contact with the inner wall of the connecting shaft.

[0015] Furthermore, a receiving groove is provided on the top side of the first connecting plate, and the interior of the receiving groove is communicated with the interior of the inner cavity. The receiving groove is located on the outer peripheral side of the infrared array sensor, and a one-way valve is fixedly installed in the receiving groove.

[0016] Furthermore, the buffer mechanism includes a accommodating cavity, which is opened on the outer wall of the round rod, and an elastic airbag is provided therein. The elastic airbag is fixedly connected to the inner wall of the corresponding accommodating cavity near one end of the storage groove, and the interior of the elastic airbag is connected to the interior of the corresponding storage groove through a connecting hole.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects: 1. When the improved assembly hole grinding device is used, the burrs on the inner ring edge or chamfered surface at the top of the assembly hole, the inner wall of the assembly hole, and the inner ring edge or chamfered surface at the bottom of the assembly hole can be removed in sequence by rotating the grinding rod, achieving a good burr removal effect on the assembly hole. 2. During the above-mentioned process of removing burrs from the inner wall of the assembly hole, the grinding rod can be rotated to simultaneously detect whether there are pits on the assembly hole and the positions of the pits on the assembly hole, thereby determining the number of pits on the assembly hole. If there are too many pits on the assembly hole, the operator is reminded that further inspection of the assembly hole is required to avoid excessive pits on the assembly hole affecting the use of automotive injection molded parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a front view of the internal structure of the polishing rod and the round rod of the present invention; Figure 3 For the present invention Figure 2 A magnified view of the structure at center A; Figure 4 A three-dimensional diagram of the internal structure of the round rod of the present invention; Figure 5 A three-dimensional diagram of the internal structure of a portion of the round rod, connecting plate 1 and connecting plate 2 of the present invention; Figure 6 For the present invention Figure 2 A magnified view of the structure at B in the middle; Figure 7 A three-dimensional diagram of the internal structure of an inverted connection plate of the present invention; Figure 8 This is a three-dimensional diagram of the internal structure of the connecting plate and part of the polishing rod of the present invention.

[0019] The reference numerals indicate: 1. Grinding rod; 2. Round rod; 3. Connecting disk 1; 4. Monitoring mechanism 1; 41. Inner cavity; 42. Connecting hole; 43. Air pressure detection sensor; 44. Sealing ring; 5. Monitoring mechanism 2; 51. Infrared array sensor; 52. Gradient reflector; 6. Driving mechanism; 61. Driver; 62. Connecting piece; 621. Fixing cylinder; 622. Hexagonal rod; 623. Connecting shaft; 624. Sealing ring; 63. Connecting disk 2; 7. Storage tank; 8. Grinding block; 9. Piston plate; 10. Ball bearing; 11. Receiving groove; 12. One-way valve; 13. Buffer mechanism; 131. Receiving chamber; 132. Elastic airbag. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0022] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0024] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6As shown, according to embodiment 1 of the present invention, a precision grinding device for assembly holes of automotive injection molded parts is provided, comprising: a grinding rod 1, a round rod 2 being fixedly mounted on its bottom end, a connecting plate 3 being rotatably sleeved on its top end via a bearing, and a driving mechanism 6 being provided above the connecting plate 3 for driving the grinding rod 1 to rotate; Two storage tanks 7 are symmetrically arranged on the outer peripheral wall of the round rod 2, and a grinding block 8 is slidably installed in each of them. The upper and lower ends of one side of the grinding block 8 are both inclined, and two buffer mechanisms 13 are provided between them for respectively injecting gas into the storage tank 7; A monitoring mechanism 4 is provided below the driving mechanism 6 and is used to monitor the length of the grinding block 8 extending from the storage tank 7; The second monitoring mechanism 5 is provided in the connecting plate 1 3 and is used to monitor the rotation angle of the grinding rod 1 .

[0025] In this embodiment, when the improved assembly hole grinding device is used, (please refer to Figure 1 As shown, the housing of the driver 61 in the driving mechanism 6 is fixedly mounted on the bottom end of the electrically controlled telescopic rod of the positioning structure of the precision grinding device for the assembly holes of automobile injection molded parts by bolts, so that the positioning structure of the precision grinding device for the assembly holes of automobile injection molded parts can adjust the position of the grinding rod 1 above the automobile injection molded parts by adjusting the position of the driver 61, so that the grinding rod 1 can be aligned with several assembly holes of the automobile injection molded parts in sequence. The above-mentioned precision grinding device for the assembly holes of automobile injection molded parts is an existing device, and a clamp is also installed on its loading platform for clamping and positioning the automobile injection molded parts. After the automobile injection molded parts are clamped and fixed on the loading platform of the precision grinding device for the assembly holes of automobile injection molded parts, the position of the grinding rod 1 is adjusted by the positioning structure, so that the grinding rod 1 is moved to be directly above several assembly holes of the automobile injection molded parts in sequence. Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, after the grinding rod 1 moves to the top of the assembly hole, the electrically controlled telescopic rod pushes the grinding rod 1 downward, and drives the round rod 2 to move downward and insert into the assembly hole until the bottom side of the grinding block 8 is coplanar with the top of the assembly hole. Then, the driving mechanism 6 drives the grinding rod 1 to rotate, and the grinding block 8 of corresponding length is thrown out from the storage tank 7 by centrifugal force (the centrifugal force exerted on the grinding block 8 can be adjusted by adjusting the rotation of the grinding rod 1). At this time, the bottom side of the grinding block 8 and the top plane of the assembly hole rub against each other, removing some burrs on the inner ring edge of the top of the assembly hole. After the burrs above the inner ring edge of the top of the assembly hole are removed, the driving mechanism 6 stops driving the grinding rod 1, and then the electrically controlled telescopic rod continues to push the grinding rod 1 downward until the middle of the bottom bevel of the grinding block 8 is aligned with the inner ring edge of the top of the assembly hole. At this time, the driving mechanism 6 continues to drive the round rod 2 to rotate and throw the grinding block 8 out, so that the bottom bevel of the grinding block 8 contacts the inner ring edge of the top of the assembly hole or the top chamfered surface, thereby removing another part of the burr on the inner ring edge of the top of the assembly hole or removing the burr on the chamfered surface through the friction between the bottom bevel of the grinding block 8 and the inner ring edge or the chamfered surface of the top of the assembly hole; After the burrs on the inner ring edge or chamfered surface of the top of the assembly hole are removed, the driving mechanism 6 stops driving the grinding rod 1, and then the electrically controlled telescopic rod continues to slowly push the grinding rod 1 downward. When the bottom end of the grinding rod 1 is inserted into the assembly hole, the driving mechanism 6 continues to drive the grinding rod 1 to rotate slowly, and the burrs on the inner wall of the assembly hole are removed by the rotating grinding rod 1. During the process of the round rod 2 removing burrs from the inner wall of the assembly hole, the round rod 2 moves downward and rotates, causing one side of the grinding block 8 to pass over the inner wall of the assembly hole. At the same time, the monitoring mechanism 1 4 is activated, and by monitoring the length of the grinding block 8 extending from the storage slot 7, it is determined whether there is a pit on the inner wall of the assembly hole, and the height of the pit on the assembly hole is determined by the distance the round rod 2 moves downward. In conjunction with the monitoring mechanism 2 5 monitoring the rotation angle of the grinding rod 1, the exact position of the pit on the inner wall of the assembly hole can be further determined, and the number of pits on the assembly hole can be simultaneously determined. If there are too many pits on the assembly hole, the operator is reminded that further inspection of the assembly hole is required to avoid excessive pits on the assembly hole affecting the use of the automotive injection molded parts. It should be noted that the operation of the above-mentioned equipment is controlled by the control host of the automobile injection molding assembly hole precision grinding device, and the detection information of the monitoring mechanism 1 4 and the monitoring mechanism 2 5 is transmitted to the control host through the existing Internet of Things. The position of the pit on the inner wall of the assembly hole is obtained and displayed on the display panel of the control host through analysis by the internal program of the control host. After the burrs on the inner wall of the assembly hole are removed, the round rod 2 is synchronously moved to the bottom side of the assembly hole, and then the driving mechanism 6 is driven to rotate according to the above, and the grinding block 8 is thrown out of the storage tank 7, so that the burrs on the inner ring edge or chamfered surface of the bottom end of the assembly hole are removed by the mutual friction between the top side of the grinding block 8 and the plane of the bottom end of the assembly hole and the mutual friction between the top side inclined surface of the grinding block 8 and the inner ring edge or chamfered surface of the bottom end of the assembly hole; After the burrs on the assembly hole are removed, the driving mechanism 6 stops driving the polishing rod 1, and the polishing rod 1 and the round rod 2 are directly pulled out of the assembly hole; To sum up, when the improved assembly hole grinding device is used, the burrs on the inner ring edge or chamfered surface at the top of the assembly hole, the inner wall of the assembly hole and the inner ring edge or chamfered surface at the bottom of the assembly hole can be removed in sequence by rotating the grinding rod 1, and the burr removal effect on the assembly hole is better.

[0026] In a further preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, the diameter of the round rod 2 is smaller than the diameter of the polishing rod 1, and the outer ring edge of the bottom end of the round rod 2 is set in an arc shape.

[0027] In this embodiment, the diameter of the round rod 2 is slightly smaller than the diameter of the polishing rod 1, so that when the round rod 2 is inserted into the assembly hole and moved downward, the round rod 2 can conflict with the burrs on the inner wall of the assembly hole, pushing the burrs to bend, so that the burrs move to the gap between the round rod 2 and the inner wall of the assembly hole, so as to avoid the conflict between the round rod 2 and the burrs affecting the downward movement of the polishing rod 1.

[0028] In a further preferred embodiment of the present invention, Figure 2 、 Figure 3 and Figure 4 As shown, a piston plate 9 is fixedly mounted on the other side of the grinding block 8 , and the outer peripheral wall of the piston plate 9 contacts the inner wall of the corresponding storage groove 7 .

[0029] In this embodiment, please refer to Figure 3 and Figure 4 As shown, when part of the grinding block 8 is thrown out of the storage tank 7 by centrifugal force, the piston plate 9 can be driven to slide synchronously in the storage tank 7, so that a negative pressure cavity of corresponding size is formed in the storage tank 7. The negative pressure cavity applies a pulling force toward the storage tank 7 to the grinding block 8 through the piston plate 9 to offset the centrifugal force on the grinding block 8; When the grinding rod 1 stops rotating, the grinding block 8 is automatically retracted into the storage slot 7 by pulling it through the negative pressure chamber in the storage slot 7, so as to avoid that part of the grinding block 8 is always outside the storage slot 7, affecting the insertion of the round rod 2 into the assembly hole or the pulling out of the round rod 2 from the assembly hole.

[0030] In a further preferred embodiment of the present invention, Figure 2 、 Figure 3 and Figure 4 As shown, a ball 10 is rotatably mounted at the center of one side of the grinding block 8 , and one end of the ball 10 close to the outer peripheral wall of the grinding rod 1 is coplanar with the outer peripheral wall of the grinding rod 1 .

[0031] In this embodiment, please refer to Figure 3 and Figure 4As shown, after the burrs on the inner ring edge or chamfered surface of the top of the assembly hole are removed, the driving mechanism 6 stops driving the grinding rod 1, and then the electrically controlled telescopic rod continues to slowly push the grinding rod 1 downward until the ball 10 contacts the inner ring edge of the top of the assembly hole. At this time, due to the mutual interference between the ball 10 and the inner ring edge of the top of the assembly hole, the grinding block 8 will not slide out of the storage groove 7, thereby avoiding the grinding block 8 extending from the storage groove 7 and rubbing against the inner wall of the assembly hole when the grinding rod 1 removes burrs on the inner wall of the assembly hole, causing damage to the inner wall of the assembly hole.

[0032] In a further preferred embodiment of the present invention, Figure 2 、 Figure 3 、 Figure 6 and Figure 8 As shown, the monitoring mechanism 4 includes an inner cavity 41, which is opened in the middle of the connecting disk 3, and the interior of the inner cavity 41 is connected to the interior of the two storage tanks 7 through a connecting hole 42. A plurality of air pressure detection sensors 43 are provided in a circular array on the outer peripheral side of the top of the grinding rod 1, and the monitoring end of each air pressure detection sensor 43 is inserted into the inner cavity 41 and is threadedly connected to the connecting disk 3.

[0033] In this embodiment, please refer to Figure 2 、 Figure 3 、 Figure 6 and Figure 8 As shown, when the polishing rod 1 is removing burrs from the inner wall of the assembly hole, the air pressure detection sensor 43 simultaneously monitors the negative pressure intensity in the inner cavity 41 (a small amount of gas is filled in the inner cavity 41 and the connecting hole 42, so that a negative pressure cavity of corresponding intensity is formed in the inner cavity 41 and the connecting hole 42, so that a corresponding pulling force toward the connecting hole 42 is continuously applied to the polishing rod 1 through the piston rod); After the ball 10 contacts the inner ring edge of the top of the assembly hole, the driving mechanism 6 continues to drive the grinding rod 1 to rotate slowly, and at the same time, the electric telescopic rod pushes the grinding rod 1 to move slowly downward, so that the grinding rod 1 is inserted into the assembly hole, and the burrs on the inner wall of the assembly hole are removed by the friction between the outer peripheral wall of the grinding rod 1 and the burrs on the inner wall of the assembly hole. At the same time, the rotation and downward movement of the round rod 2 make the ball 10 roll over various positions on the inner wall of the assembly hole in turn. When the ball 10 moves to the position of the pit, due to the pull of the grinding block 8 by the centrifugal force, part of the grinding is removed. The grinding block 8 extends from the storage tank 7 until the ball 10 contacts the inner wall of the pit. At this time, the negative pressure intensity in the storage tank 7 increases. Then, the ball 10 rolls out of the pit along the inner wall of the pit, and the negative pressure intensity in the storage tank 7 is restored. The air pressure detection sensor 43 transmits the detection information of the negative pressure intensity in the inner cavity 41 to the control host through the Internet of Things. The air pressure detection sensor 43 is installed on the connecting plate 1 3 and does not need to rotate with the grinding rod 1, which facilitates the connection of the external circuit of the air pressure detection sensor 43. The provision of multiple air pressure detection sensors 43 can avoid damage to the air pressure detection sensor, which would affect the use of the device. When the air pressure detection sensor 43 is damaged, the air pressure detection sensor 43 can be directly unscrewed from the connecting disk 3, and a new air pressure detection sensor 43 can be screwed back into the connecting disk 3 to complete the replacement of the air pressure detection sensor 43. The replacement operation of the air pressure detection sensor 43 is simple.

[0034] In a further preferred embodiment of the present invention, Figure 2 and Figure 6 As shown, the top of the grinding rod 1 is in an I-shaped configuration when viewed from above, and a sealing ring 44 is installed at a position corresponding to the grinding rod 1 in the wall of the connecting plate 1 3 , and the inner ring wall of the sealing ring 44 is in contact with the outer peripheral wall of the grinding rod 1 .

[0035] In this embodiment, the setting of the sealing ring 44 can seal the gap between the top of the grinding rod 1 and the connecting plate 3 to prevent external gas from flowing into the inner cavity 41 through the gap between the grinding rod 1 and the connecting plate when the grinding rod 1 is rotating or not rotating, thereby affecting the pulling force exerted on the grinding plate toward the storage tank 7.

[0036] In a further preferred embodiment of the present invention, Figure 2 、 Figure 6 and Figure 7 As shown, the monitoring mechanism 2 5 includes an infrared array sensor 51, which is fixedly mounted on the inner top wall of the inner cavity 41. A gradient reflector 52 is fixedly mounted at the top end of the polishing rod 1 at a position corresponding to the infrared array sensor 51, and both the infrared array sensor 51 and the gradient reflector 52 are arranged in a ring shape.

[0037] In this embodiment, please refer to Figure 2 、 Figure 6 and Figure 7 As shown, during the rotation of the polishing rod 1, the infrared array sensor 51 is started, emitting infrared rays to the gradient reflector 52 and detecting the intensity distribution of the reflected light. At the same time, the rotating polishing rod 1 drives the gradient reflector 52 to rotate synchronously (the reflectivity of the gradient reflector 52 gradually changes along the axial direction of the rod, such as from total reflection to total absorption). The control host reads the reflectivity gradient of different positions of the gradient reflector 52 according to the infrared array sensor 51, and calculates the rotation of the polishing rod 1 according to the linear relationship between the reflectivity intensity distribution. In conjunction with the height of the round rod 2, that is, the polishing rod 1 in the assembly hole, the position of the ball 10 on the inner wall of the assembly hole can be determined, so that when the pressure changes in the inner cavity 41, the position of the pit on the inner wall of the assembly hole is determined. The device has a high degree of automation, and the infrared array sensor 51 is installed on the connecting plate 3 and will not rotate with the polishing rod 1, which facilitates the connection of the infrared array sensor 51 with the external circuit.

[0038] In a further preferred embodiment of the present invention, Figure 1、 Figure 2 、 Figure 5 and Figure 6 As shown, the driving mechanism 6 includes a driver 61, which is arranged above the connecting disk 1 3, and the driving end of the driver 61 is connected to the polishing rod 1 through a connecting piece 62. A connecting disk 2 63 is fixedly installed on the outer shell of the bottom end of the driver 61, and the connecting disk 2 63 is fixedly connected to the connecting disk 1 3 through bolts.

[0039] In this embodiment, please refer to Figure 2 、 Figure 5 and Figure 6 As shown, when the driving mechanism 6 drives the polishing rod 1 to rotate, the driver 61 starts to drive the polishing rod 1 to rotate through the connecting member 62 (the driver 61 is mainly composed of a shell, a motor and a gear transmission structure), and in this process, due to the bolt fixation between the connecting disk 2 63 and the connecting disk 1 3 and the connection fixation between the connecting disk 2 63 and the driver 61 shell, during the rotation of the polishing rod 1, the connecting disk 1 3 will not rotate with the polishing rod 1, thereby preventing the air pressure detection sensor 43 and the infrared array sensor 51 on the connecting disk 1 3 from rotating with the polishing rod 1. The air pressure detection sensor 43 and the infrared array sensor 51 are installed in the same state as the existing air pressure detection sensor 43 and the infrared array sensor 51, and are both installed in a fixed position. The connection between the air pressure detection sensor 43 and the infrared array sensor 51 and the external circuit can be completed by using the existing original line connection method.

[0040] In a further preferred embodiment of the present invention, Figure 2 、 Figure 5 、 Figure 6 and Figure 8 As shown, the connecting member 62 includes a fixed cylinder 621, the top of which is inserted into the connecting disk 2 63 and is rotatably connected to the connecting disk 2 63 through a bearing, and the driving end of the driver 61 is inserted into the connecting disk 2 63 and fixedly connected to the center position of the top of the fixed cylinder 621, and a hexagonal rod 622 is slidably installed in the fixed cylinder 621, and the bottom end of the hexagonal rod 622 and the bottom end of the fixed cylinder 621 are both in contact with the top side of the connecting disk 1 3, and the bottom end of the hexagonal rod 622 is fixedly installed with a connecting shaft 623, and the bottom end of the connecting shaft 623 is inserted into the inner cavity 41 and fixedly connected to the center position of the top of the grinding rod 1.

[0041] In this embodiment, please refer to Figure 2 、 Figure 5 、 Figure 6 and Figure 8As shown, when the driver 61 is started, it first drives the fixed cylinder 621 located in the second connecting plate 63 to rotate (the inner hole of the fixed cylinder 621 is a hexagonal hole). Due to the mutual interference between the hexagonal rod 622 and the inner wall of the fixed cylinder 621, the rotating fixed cylinder 621 synchronously drives the hexagonal rod 622 to rotate, and then drives the grinding rod 1 to rotate together through the connecting shaft 623; When replacing the grinding rod 1 and the grinding block 8, the operator unscrews the bolts in the connecting disk 1 3, and then pulls the grinding rod 1 downward to directly pull the hexagonal rod 622 out of the fixed tube 621, and separate the connecting disk 1 3 from the connecting disk 2 63 to complete the disassembly of the grinding rod 1. Then, replace the new grinding rod 1, and fit the connecting disk 1 3 on the new grinding rod 1 with the connecting disk 2 63, and simultaneously insert the hexagonal rod 622 into the fixed tube 621, and then complete the connection and fixation between the connecting disk 1 3 and the connecting disk 2 63 by bolts, and the replacement of the grinding rod 1 and the grinding block 8 can be completed. The operation is relatively simple.

[0042] In a further preferred embodiment of the present invention, Figure 6 and Figure 8 As shown, the top of the connecting hole 42 is Y-shaped, and the two openings at the top of the connecting hole 42 are both located on the outer peripheral side of the connecting shaft 623. The connecting shaft 623 passes through the inner hole of the infrared array sensor 51 and the inner hole of the gradient reflector 52 and is gap-fitted with the infrared array sensor 51 and the gradient reflector 52. A sealing ring 624 is installed at the position corresponding to the connecting shaft 623 in the plate wall of the connecting disk 3, and the inner ring wall of the sealing ring 624 is in contact with the inner wall of the connecting shaft 623.

[0043] In this embodiment, please refer to Figure 6 and Figure 8 As shown, the Y-shaped arrangement at the top of the connecting hole 42 allows sufficient space between the two openings at the top of the connecting hole 42 for connection and fixation of the connecting shaft 623 and the polishing rod 1, thereby preventing the connection between the connecting shaft 623 and the polishing rod 1 from affecting the communication between the interior of the connecting hole 42 and the interior of the inner cavity 41; The setting of the sealing ring 624 can seal the gap between the connecting shaft 623 and the connecting disk 3 to prevent external air from flowing into the inner cavity 41 through the gap between the connecting shaft 623 and the connecting disk 3, thereby affecting the tension exerted on the piston plate 9.

[0044] In a further preferred embodiment of the present invention, Figure 8 As shown, a receiving groove 11 is provided on the top side of the connecting plate 1 3 , and the interior of the receiving groove 11 is communicated with the interior of the inner cavity 41 . The receiving groove 11 is located on the outer peripheral side of the infrared array sensor 51 , and a one-way valve 12 is fixedly installed in the receiving groove 11 . In this embodiment, please refer to Figure 8As shown, when the air pressure detection sensor 43 is replaced, due to the connection between the inner cavity 41 and the outside world, the outside air flows into the inner cavity 41 through the mounting hole of the air pressure detection sensor 43, so that the air pressure in the inner cavity 41 is equal to that of the outside world. At this time, the one-way valve 12 is connected to the external air extraction device through a pipeline, and part of the gas in the inner cavity 41 is extracted from the one-way valve 12 through the air extraction device, so that the negative pressure intensity in the inner cavity 41 is restored to its original state, thereby avoiding damage to the device due to the replacement of the air pressure detection sensor 43 and facilitating the maintenance of the device.

[0045] In a further preferred embodiment of the present invention, Figure 4 As shown, the buffer mechanism 13 includes a receiving cavity 131, which is opened on the outer peripheral wall of the round rod 2, and an elastic airbag 132 is provided therein. The elastic airbag 132 is fixedly connected to the inner wall of the corresponding receiving cavity 131 at one end close to the storage groove 7. The interior of the elastic airbag 132 is connected to the interior of the corresponding storage groove 7 through a communicating hole. In this embodiment, please refer to Figure 4 As shown, when the grinding block 8 slides out of the storage tank 7, part of the gas is injected into the storage tank 7 through the deformation of the elastic airbag 132 to avoid the negative pressure suction force on the piston plate 9 being too large during the process of the grinding block 8 sliding out of the storage tank 7, which causes the grinding block 8 to be unable to slide out.

[0046] Working principle: When the improved assembly hole grinding device is used, the burrs on the inner ring edge or chamfered surface of the top end of the assembly hole, the inner wall of the assembly hole and the inner ring edge or chamfered surface of the bottom end of the assembly hole are removed in turn by rotating the grinding rod 1 and the grinding block 8. When the grinding rod 1 is rotated to remove the burrs on the inner wall of the assembly hole, the ball 10 is synchronously driven to roll over all positions on the inner wall of the assembly hole in turn, so as to detect the number and position of the pits on the nickel coin of the assembly hole through the length of the grinding block 8 extending from the storage groove 7.

[0047] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A precision grinding device for assembly holes of automobile injection molded parts, characterized in that: include: A grinding rod (1) is fixedly provided with a round rod (2) at its bottom end, and a connecting disc (3) is provided at its top end through a bearing rotating sleeve, and a driving mechanism (6) is provided above the connecting disc for driving the grinding rod (1) to rotate; Two storage tanks (7) are symmetrically arranged on the outer peripheral wall of the round rod (2), and a grinding block (8) is slidably installed in each of the two storage tanks. The upper and lower ends of one side of the grinding block (8) are both inclined, and two buffer mechanisms (13) are provided between them for respectively injecting gas into the storage tanks (7); A monitoring mechanism (4) is provided below the driving mechanism (6) and is used to monitor the length of the grinding block (8) extending from the storage tank (7); The second monitoring mechanism (5) is arranged in the first connecting plate (3) and is used to monitor the rotation angle of the grinding rod (1).

2. The precision grinding device for assembly holes of automobile injection molded parts according to claim 1, characterized in that: The diameter of the round rod (2) is smaller than the diameter of the grinding rod (1), and the outer ring edge of the bottom end of the round rod (2) is arranged in an arc shape. A piston plate (9) is fixedly installed on the other side of the grinding block (8), and the outer peripheral wall of the piston plate (9) contacts the inner wall of the corresponding storage groove (7). A ball (10) is rotatably installed at the center position of one side of the grinding block (8), and one end of the ball (10) close to the outer peripheral wall of the grinding rod (1) is coplanar with the outer peripheral wall of the grinding rod (1).

3. The precision grinding device for assembly holes of automobile injection molded parts according to claim 2, characterized in that: The monitoring mechanism (4) includes an inner cavity (41) which is opened in the middle of the connecting disk (3), and the interior of the inner cavity (41) is connected to the interiors of the two storage tanks (7) through the connecting hole (42). A plurality of air pressure detection sensors (43) are provided in a circular array on the outer peripheral side of the top of the polishing rod (1), and the monitoring end of each air pressure detection sensor (43) is inserted into the inner cavity (41) and is threadedly connected to the connecting disk (3).

4. The precision grinding device for assembly holes of automobile injection molded parts according to claim 3, characterized in that: The top of the polishing rod (1) is in an I-shaped configuration when viewed from the front. A sealing ring (44) is installed at a position corresponding to the polishing rod (1) in the wall of the connecting plate (3), and the inner ring wall of the sealing ring (44) contacts the outer peripheral wall of the polishing rod (1).

5. The precision grinding device for assembly holes of automobile injection molded parts according to claim 4, characterized in that: The second monitoring mechanism (5) includes an infrared array sensor (51) fixedly mounted on the inner top wall of the inner cavity (41); a gradient reflector (52) is fixedly mounted on the top of the polishing rod (1) at a position corresponding to the infrared array sensor (51); and both the infrared array sensor (51) and the gradient reflector (52) are arranged in a ring shape.

6. The precision grinding device for assembly holes of automobile injection molded parts according to claim 5, characterized in that: The driving mechanism (6) includes a driver (61) which is arranged above the connecting disk 1 (3), and the driving end of the driver (61) is connected to the grinding rod (1) through a connecting piece (62). A connecting disk 2 (63) is fixedly mounted on the outer shell at the bottom end of the driver (61), and the connecting disk 2 (63) is fixedly connected to the connecting disk 1 (3) through bolts.

7. The precision grinding device for assembly holes of automobile injection molded parts according to claim 1, characterized in that: The connecting member (62) includes a fixed cylinder (621), the top of which is inserted into the connecting disk 2 (63) and is rotatably connected to the connecting disk 2 (63) through a bearing, and the driving end of the driver (61) is inserted into the connecting disk 2 (63) and fixedly connected to the center position of the top of the fixed cylinder (621), and a hexagonal rod (622) is slidably installed in the fixed cylinder (621), and the bottom ends of the hexagonal rod (622) and the bottom ends of the fixed cylinder (621) are both in contact with the top side of the connecting disk 1 (3), and the bottom end of the hexagonal rod (622) is fixedly installed with a connecting shaft (623), and the bottom end of the connecting shaft (623) is inserted into the inner cavity (41) and fixedly connected to the center position of the top end of the grinding rod (1).

8. The precision grinding device for assembly holes of automobile injection molded parts according to claim 1, characterized in that: The top of the connecting hole (42) is Y-shaped, and the two openings at the top of the connecting hole (42) are both located on the outer peripheral side of the connecting shaft (623). The connecting shaft (623) passes through the inner hole of the infrared array sensor (51) and the inner hole of the gradient reflector (52) and is clearance-matched with the infrared array sensor (51) and the gradient reflector (52). A sealing ring (624) is installed at a position corresponding to the connecting shaft (623) in the plate wall of the connecting disk (3), and the inner ring wall of the sealing ring (624) contacts the inner wall of the connecting shaft (623).

9. The precision grinding device for assembly holes of automobile injection molded parts according to claim 1, characterized in that: A receiving groove (11) is provided on the top side of the connecting disk (3), and the interior of the receiving groove (11) is communicated with the interior of the inner cavity (41). The receiving groove (11) is located on the outer peripheral side of the infrared array sensor (51), and a one-way valve (12) is fixedly installed in the receiving groove (11).

10. The precision grinding device for assembly holes of automobile injection molded parts according to claim 9, characterized in that: The buffer mechanism (13) comprises a receiving cavity (131) which is formed on the outer peripheral wall of the round rod (2) and in which an elastic airbag (132) is provided. The elastic airbag (132) is fixedly connected to the inner wall of the corresponding receiving cavity (131) at one end close to the storage groove (7). The interior of the elastic airbag (132) is connected to the interior of the corresponding storage groove (7) via a communicating hole.

Images