Injection molding part assembling hole grinding device

Abstract

The invention relates to the technical field of injection molding part machining, and discloses an injection molding part assembling hole grinding device which comprises a base, a moving mechanism and a position changing mechanism are arranged on the base, a grinding mechanism is arranged on the moving mechanism, a clamping mechanism for fixing an injection molding part is arranged on the position changing mechanism, and the grinding mechanism comprises a driving mechanism, a position changing mechanism, a grinding mechanism and a fine grinding mechanism. The transposition mechanism comprises a fixing frame, a grinding displacement frame and an accurate grinding displacement frame, the grinding mechanism and the accurate grinding mechanism are arranged in the grinding displacement frame and the accurate grinding displacement frame respectively, the positions of the grinding displacement frame and the accurate grinding displacement frame are changed through the transposition mechanism, and the driving shaft drives the grinding mechanism and the accurate grinding mechanism to work respectively. According to the grinding device for the assembly hole of the injection molding part, the rough grinding function, the accurate grinding function, the multi-degree-of-freedom adjusting mechanism and the high-precision vibration grinding technology are integrated, and efficient, high-precision and multi-angle assembly hole grinding is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molded part processing, in particular to an injection molded part assembly hole grinding device. Background Art

[0002] Automotive injection molded parts refer to automotive parts manufactured through the injection molding process. Injection molding is a manufacturing process in which molten plastic material is injected into a mold and then cooled and solidified to form the desired shape. Automotive injection molded parts are usually made of engineering plastics or composite materials. They have the characteristics of light weight, high strength, corrosion resistance, and easy processing. They are widely used in automotive interiors, exteriors, functional parts, and structural parts. The processing flow includes injection molding and post-processing. The post-processing process mainly includes deburring, grinding, surface treatment, assembly, etc. In order to reduce the clearance with other components of the car and improve product quality, it is usually necessary to grind the assembly holes to improve assembly accuracy.

[0003] In the production process of injection molded parts, the processing quality of assembly holes directly affects the assembly accuracy and performance of the products. Traditional assembly hole grinding methods mostly use manual operation or single-function automated equipment, which has the following problems: 1. Low efficiency. Manual operation relies on workers' experience, with low efficiency and poor consistency; 2. Insufficient precision. Single-function automated equipment cannot meet the needs of rough grinding and fine grinding at the same time, resulting in the difficulty in meeting high-precision requirements for assembly hole size and surface quality; 3. Poor flexibility. Traditional equipment is difficult to adapt to the grinding needs of different angles and positions, limiting its scope of application; 4. High manufacturing cost. Grinding equipment that meets the different needs of rough grinding and fine grinding usually requires multiple robotic arms or a tool magazine and tool changing structure, which increases equipment costs.

[0004] To solve the above problems, the present invention provides an injection molded part assembly hole grinding device, which integrates rough grinding and fine grinding functions and adopts a multi-degree-of-freedom adjustment mechanism to achieve efficient, high-precision, and multi-angle assembly hole grinding. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a device for polishing assembly holes of injection molded parts.

[0006] In order to solve the above technical problems, the present invention provides a technical solution: a device for polishing assembly holes of injection molded parts, comprising a base, a moving mechanism and a displacement mechanism are provided on the base, a polishing mechanism is provided on the moving mechanism, and a clamping mechanism for fixing the injection molded parts is provided on the displacement mechanism;

[0007] The grinding mechanism includes a driving mechanism, a position changing mechanism, a grinding mechanism and a fine grinding mechanism;

[0008] The driving mechanism includes a second motor and a driving shaft, and the output end of the second motor drives the driving shaft to rotate;

[0009] The shifting mechanism comprises a fixed frame, a grinding shifting frame and a fine grinding shifting frame, the fixed frame is fixedly connected to the moving mechanism, the driving shaft is rotatably arranged in the fixed frame, the grinding shifting frame and the fine grinding shifting frame are arranged on both sides of the fixed frame, and the grinding mechanism and the fine grinding mechanism are respectively arranged in the grinding shifting frame and the fine grinding shifting frame;

[0010] The grinding displacement rack and the fine grinding displacement rack are changed in position by the position change mechanism, so that the driving shaft drives the grinding mechanism and the fine grinding mechanism to work respectively, and completes the shaping and fine grinding operations of the assembly holes of the injection molded parts respectively.

[0011] As an improvement: the shifting mechanism also includes a shifting rod, a motor three is arranged on the outside of the fixed frame, and the ends of two parallel shifting rods are respectively hinged to the grinding shifting frame and the fine grinding shifting frame, one of the shifting rods is hinged to the fixed frame, and the other is connected to the output end of the motor three.

[0012] As an improvement: the fine grinding mechanism includes a fine grinding transmission rod and a fine grinding shaft rotatably arranged on the fine grinding displacement frame, the fine grinding transmission rod cooperates with the fine grinding shaft for transmission, one end of the fine grinding transmission rod is provided with a gear seven meshing with the gear five at the end of the driving shaft, and one end of the fine grinding shaft is provided with a fine grinding head.

[0013] As an improvement: the fine grinding transmission rod is provided with bevel gear three and a spline shaft, the fine grinding shaft is provided with a spline groove matching with the spline shaft, the fine grinding displacement frame is rotatably provided with bevel gear four meshing with bevel gear three, one side of bevel gear four is coaxially connected with an eccentric wheel, the fine grinding shaft is rotatably provided with a transmission ring platform, the outer side of the transmission ring platform is hingedly provided with a swing rod, and the eccentric wheel rotatably matches with the groove at the end of the swing rod.

[0014] As an improvement: the fine grinding position frame is provided with an upper limit frame which is rotatably matched with the fine grinding transmission rod, the fine grinding position frame is provided with two lower limit frames which are slidably matched with the fine grinding shaft, the transmission ring table is arranged between the two lower limit frames, the fine grinding position frame is provided with an external fixed rod, and the bevel gear four is rotatably arranged on the external fixed rod.

[0015] As an improvement: the grinding mechanism includes a grinding transmission rod rotatably arranged on a grinding displacement frame, one end of the grinding transmission rod is provided with a gear six meshing with a gear five at the end of the drive shaft, and the other end is provided with a grinding head, the grinding head includes a mounting platform, a grinding straight knife and two grinding bevel knives, the mounting platform is arranged at the end of the grinding transmission rod, the grinding straight knife and the two grinding bevel knives are respectively fixed on the two mounting surfaces of the mounting platform by bolts, and the two grinding bevel knives are symmetrically arranged.

[0016] As an improvement: the fixing frame is arranged obliquely, and the driving mechanism also includes a transmission shaft, on which a gear four and a bevel gear one are provided, a gear three meshing with the gear four is provided at the output end of the motor two, and a bevel gear two meshing with the bevel gear one is provided at one end of the driving shaft.

[0017] As an improvement: the displacement mechanism includes a motor 1, a turntable, an external frame and an elliptical turntable. A rotating column is provided at the bottom of the turntable and cooperates with the base for rotation. Gear 2 is provided on the rotating column. Gear 1 meshing with gear 2 is provided at the output end of motor 1. Two external frames are symmetrically arranged on both sides of the turntable. The elliptical turntable is rotatably arranged on the external frame. Cylinder 3 is hingedly provided on the turntable. The output end of cylinder 3 is hinged to the elliptical turntable. Multiple clamping mechanisms are arranged on the elliptical turntable.

[0018] As an improvement: the clamping mechanism includes a rotating seat, an extension rod, a fourth cylinder, a press table and an external expansion piece. The rotating seat is rotatably arranged on an elliptical rotating frame. The extension rod passes through the through hole on the rotating seat and is pin-connected to the rotating seat. The fourth cylinder and the press table are respectively hinged to the extension rod. The output end of the fourth cylinder is hinged to the press table. A placement table is provided at the end of the extension rod, and an insert tube is provided on the placement table. The external expansion piece is arranged in the insert tube to position the positioning hole of the injection molded part.

[0019] As an improvement: the expansion part includes a lifting rod that slides axially in the inner through hole of the insert tube and an expansion platform that slides radially in the side through hole of the insert tube. The top of the lifting rod cooperates with the pressing platform, and the bottom is provided with a spring connected to the bottom of the placing platform. The lifting rod is provided with a sloped surface one, and the inner side of the expansion platform is provided with a sloped surface two that slides with the sloped surface one.

[0020] The beneficial effects of the present invention compared with the prior art are as follows: the assembly hole grinding device for injection molded parts of the present invention realizes high-efficiency, high-precision, and multi-angle assembly hole grinding by integrating rough grinding and fine grinding functions, a multi-degree-of-freedom adjustment mechanism, and high-precision vibration grinding technology, which significantly improves production efficiency and product quality and has important industrial application value. Specifically:

[0021] 1. The rapid switching between the grinding mechanism and the fine grinding mechanism can be achieved through the transposition mechanism, and the rough grinding and fine grinding processes can be completed on the same equipment, which significantly improves the production efficiency, does not require the addition of additional robotic arms and tool changing structures, and reduces the equipment cost;

[0022] 2. While realizing the basic rotation function of the fine grinding shaft, the fine grinding mechanism realizes axial vibration through the cooperation of the eccentric wheel and the swing rod, so that the fine grinding head performs vibration grinding while rotating, which significantly improves the surface quality and dimensional accuracy of the assembly hole;

[0023] 3. The displacement mechanism can adjust the horizontal position and tilt angle of the injection molded parts through the cooperation of motor 1 and cylinder 3 to meet the grinding requirements of injection molded parts of different shapes and sizes. The clamping mechanism can accurately position and fix the injection molded parts through the radial expansion function of the external expansion part to ensure stability during the grinding process;

[0024] 4. This device is suitable for the grinding needs of various injection molding assembly holes, especially for the processing of injection molding parts with complex shapes and high precision requirements, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure diagram of the present invention is a device for polishing the assembly hole of an injection molded part. Figure 1 .

[0026] Figure 2 The structure diagram of the present invention is a device for polishing the assembly hole of an injection molded part. Figure 2 .

[0027] Figure 3 It is an exploded view of a moving mechanism of an injection molded part assembly hole grinding device of the present invention.

[0028] Figure 4 The present invention is a schematic structural diagram of a displacement mechanism of a device for polishing an assembly hole of an injection molded part.

[0029] Figure 5 The present invention is a schematic structural diagram of a clamping mechanism of an injection molded part assembly hole grinding device.

[0030] Figure 6 The invention discloses an exploded view of a clamping mechanism of a device for polishing assembly holes of injection molded parts.

[0031] Figure 7 The invention discloses an exploded view of an external expansion member of a device for polishing an assembly hole of an injection molded part.

[0032] Figure 8 The present invention is a schematic structural diagram of a grinding mechanism of a device for grinding assembly holes of injection molded parts.

[0033] Fig. 9 The invention discloses an exploded view of a grinding mechanism of a device for grinding assembly holes of injection molded parts.

[0034] Fig.10 The present invention is a structural schematic diagram of a driving mechanism of a device for polishing assembly holes of injection molded parts.

[0035] Fig.11 The present invention is a structural schematic diagram of a transposition mechanism of an injection molded part assembly hole grinding device.

[0036] Fig.12 The present invention is a schematic structural diagram of a grinding mechanism of a device for grinding assembly holes of injection molded parts.

[0037] Fig.13 The present invention is a schematic structural diagram of a fine grinding mechanism of a device for grinding assembly holes of injection molded parts.

[0038] Fig.14 The invention discloses an exploded view of a fine grinding mechanism of a device for grinding assembly holes of injection molded parts.

[0039] As shown in the figure: 1. Base; 2. Moving mechanism; 3. Displacement mechanism; 4. Clamping mechanism; 5. Grinding mechanism; 6. Driving mechanism; 7. Displacement mechanism; 8. Grinding mechanism; 9. Fine grinding mechanism; 21. Moving frame 1; 22. Moving frame 2; 23. Cylinder 1; 24. Lifting frame; 25. Cylinder 2; 26. Mounting frame; 31. Motor 1; 311. Gear 1; 32. Turntable; 321. Rotating column; 322. Gear 2; 33, external frame; 34, elliptical rotating frame; 35, cylinder 3; 41, rotating seat; 411, tightening bolt; 42, extension rod; 421, socket; 422, placement table; 423, insert tube; 43, pin shaft; 44, cylinder 4; 45, press table; 46, external expansion piece; 461, lifting rod; 462, inclined plane 1; 463, spring; 464, external expansion table; 465, inclined plane 2; 466, inclined plane 3 ; 61, motor 2; 611, gear 3; 62, transmission shaft; 621, gear 4; 622, bevel gear 1; 63, drive shaft; 631, bevel gear 2; 632, gear 5; 71, fixed frame; 711, motor 3; 712, camera; 72, grinding displacement frame; 73, fine grinding displacement frame; 731, upper limit frame; 732, lower limit frame; 733, external fixing rod; 74, displacement rod; 81, grinding transmission Moving rod; 82, gear six; 83, grinding head; 831, mounting table; 832, grinding straight knife; 833, grinding oblique knife; 91, fine grinding transmission rod; 911, gear seven; 912, bevel gear three; 913, spline shaft; 92, fine grinding shaft; 921, spline groove; 922, fine grinding head; 923, rubber sleeve; 924, fine grinding leather; 93, bevel gear four; 94, eccentric wheel; 95, swing rod; 96, transmission ring table. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0041] Combined with Figure 1 , Attachment Figure 8 and attached Fig. 9As shown, a device for grinding assembly holes of injection molded parts comprises a base 1, a moving mechanism 2 and a displacement mechanism 3 are arranged on the base 1, a grinding mechanism 5 is arranged on the moving mechanism 2, a clamping mechanism 4 for fixing the injection molded parts is arranged on the displacement mechanism 3, the grinding mechanism 5 comprises a driving mechanism 6, a displacement mechanism 7, a grinding mechanism 8 and a fine grinding mechanism 9, the driving mechanism 6 comprises a second motor 61 and a driving shaft 63, the output end of the second motor 61 drives the driving shaft 63 to rotate, the displacement mechanism 7 comprises a fixing frame 71, a grinding displacement frame 72 and a fine grinding displacement frame 9. The positioning frame 73 and the fixed frame 71 are fixedly connected to the moving mechanism 2, the driving shaft 63 is rotatably arranged in the fixed frame 71, the grinding displacement frame 72 and the fine grinding displacement frame 73 are arranged on both sides of the fixed frame 71, the grinding mechanism 8 and the fine grinding mechanism 9 are respectively arranged in the grinding displacement frame 72 and the fine grinding displacement frame 73, and the grinding displacement frame 72 and the fine grinding displacement frame 73 are changed in position through the shifting mechanism 7, so that the driving shaft 63 drives the grinding mechanism 8 and the fine grinding mechanism 9 to work respectively, and completes the shaping and fine grinding operations of the assembly holes of the injection molded parts respectively.

[0042] Combined with Figure 8 , Attachment Fig. 9 , Attachment Fig.11 , Attachment Fig.12 and attached Fig.13 As shown, the shifting mechanism 7 also includes a shifting rod 74, a motor 3 711 is provided on the outer side of the fixed frame 71, and the ends of the two parallel shifting rods 74 are respectively hinged to the grinding displacement frame 72 and the fine grinding displacement frame 73, one of the shifting rods 74 is hinged to the fixed frame 71, and the other is connected to the output end of the motor 3 711. The grinding mechanism 8 includes a grinding transmission rod 81 rotatably arranged on the grinding displacement frame 72, one end of the grinding transmission rod 81 is provided with a gear 6 82 meshing with the gear 5 632 at the end of the drive shaft 63, and the other end is provided with a grinding head 83. The fine grinding mechanism 9 includes a fine grinding transmission rod 91 and a fine grinding shaft 92 rotatably arranged on the fine grinding displacement frame 73, the fine grinding transmission rod 91 is matched with the fine grinding shaft 92 for transmission, one end of the fine grinding transmission rod 91 is provided with a gear 7 911 meshing with the gear 5 632 at the end of the drive shaft 63, and one end of the fine grinding shaft 92 is provided with a fine grinding head 922.

[0043] The working principle of the grinding mechanism 5 is as follows: the motor 3 711 drives the shifting rod 74 to rotate. Since the two shifting rods 74 are arranged in parallel, the grinding shifting frame 72 and the fine grinding shifting frame 73 are always kept parallel to the fixed frame 71 and rotate and shift, so that the grinding shifting frame 72 or the fine grinding shifting frame 73 moves to the front end of the fixed frame 71 and fits with the fixed frame 71. Figure 8In the state shown, the fine grinding displacement frame 73 is attached to the front end position of the fixed frame 71, and the gear five 632 is meshed with the gear seven 911. The fine grinding shaft 92 is driven to rotate by the driving shaft 63, so that the fine grinding head 922 performs fine grinding on the assembly hole. After the grinding displacement frame 72 is attached to the front end position of the fixed frame 71 through the shifting mechanism 7, the gear five 632 is meshed with the gear six 82, and the grinding transmission rod 81 is driven to rotate by the driving shaft 63, so that the grinding head 83 performs shaping and rough grinding on the assembly hole. The rapid switching of the shaping and rough grinding and fine grinding functions is realized by the shifting of the shifting mechanism 7.

[0044] Combined with Fig.13 and attached Fig.14 As shown, the fine grinding transmission rod 91 is provided with an umbrella tooth three 912 and a spline shaft 913, the fine grinding shaft 92 is provided with a spline groove 921 cooperating with the spline shaft 913, the fine grinding displacement frame 73 is rotatably provided with an umbrella tooth four 93 meshing with the umbrella tooth three 912, one side of the umbrella tooth four 93 is coaxially connected with an eccentric wheel 94, the fine grinding shaft 92 is rotatably provided with a transmission ring platform 96, the outer side of the transmission ring platform 96 is hingedly provided with a swing rod 95, the eccentric wheel 94 is rotatably matched with the groove at the end of the swing rod 95, the fine grinding displacement frame 73 is provided with an upper limit frame 731 rotatably matched with the fine grinding transmission rod 91, the fine grinding displacement frame 73 is provided with two lower limit frames 732 slidably matched with the fine grinding shaft 92, the transmission ring platform 96 is arranged between the two lower limit frames 732, the fine grinding displacement frame 73 is provided with an external fixing rod 733, and the umbrella tooth four 93 is rotatably arranged on the external fixing rod 733.

[0045] The vibration working principle of the fine grinding mechanism 9 is as follows: the fine grinding transmission rod 91 drives the fine grinding shaft 92 to rotate through the cooperation of the spline shaft 913 and the spline groove 921, so that the fine grinding head 922 rotates to realize the most basic grinding action; the fine grinding transmission rod 91 drives the bevel gear four 93 to rotate through the meshing transmission of the bevel gear three 912 and the bevel gear four 93; the eccentric wheel 94 coaxially connected to the bevel gear four 93 rotates around the axis of the bevel gear four 93; the eccentric wheel 94 rotates with the groove at the end of the swing rod 95 to move the swing rod 95; the swing rod 95 drives the transmission ring table 96 to perform axial vibration between the two lower limit frames 732; the transmission ring table 96 cooperates with the fine grinding shaft 92 to drive the fine grinding shaft 92 to perform axial vibration, so that the fine grinding head 922 performs axial vibration while rotating, thereby improving the fine grinding effect.

[0046] Combined with Fig.12 and attached Fig.14As shown, the grinding head 83 includes a mounting platform 831, a straight grinding knife 832 and two bevel grinding knives 833. The mounting platform 831 is arranged at the end of the grinding transmission rod 81. The straight grinding knife 832 and the two bevel grinding knives 833 are respectively fixed on the two mounting surfaces of the mounting platform 831 by bolts. The two bevel grinding knives 833 are symmetrically arranged. The fine grinding head 922 includes a rubber sleeve 923 and a fine grinding leather 924. The rubber sleeve 923 is sleeved on the bottom end of the fine grinding shaft 92, and the fine grinding leather 924 is arranged on the outside of the rubber sleeve 923.

[0047] Working principle of the grinding head 83 and the fine grinding head 922: the mounting platform 831 is fixed to the end of the grinding transmission rod 81, and serves as the mounting base for the grinding straight knife 832 and the grinding bevel knife 833. The grinding straight knife 832 and the two grinding bevel knives 833 are respectively fixed to the two mounting surfaces of the mounting platform 831 by bolts to ensure the stability, replaceability and convenience of angle adjustment of the tools. The grinding straight knife 832 is mainly used for plane grinding of the inner side surface of the assembly hole of the injection molded part to remove excess material. The two grinding bevel knives 833 are symmetrically arranged on the mounting platform 831, and are mainly used for grinding the inner side corners of the assembly hole of the injection molded part. Since the grinding bevel knives 833 are installed at an inclined angle, the chamfer shape of the assembly hole meets the requirements, and the rough machining process is completed by the grinding straight knife 832 and the grinding bevel knife 833.

[0048] The rubber sleeve 923 has a certain elasticity and can provide a buffering effect during the fine grinding process to avoid excessive wear or damage to the injection molded parts. It can also better fit the shape of the assembly hole. The fine grinding leather 924 is fixed to the outside of the rubber sleeve 923 and is usually made of a highly wear-resistant material. The surface of the fine grinding leather 924 has a certain roughness and is used to finely grind the inner wall of the assembly hole of the injection molded part, remove burrs and uneven parts left after rough machining, and achieve fine grinding of the assembly hole after rough machining.

[0049] Combined with Figure 2 , Attachment Fig.10 and attached Fig.11 As shown, the fixing frame 71 is arranged obliquely, a camera 712 is provided at the bottom of the fixing frame 71, the driving mechanism 6 also includes a transmission shaft 62, a gear four 621 and a bevel gear one 622 are provided on the transmission shaft 62, a gear three 611 meshing with the gear four 621 is provided at the output end of the motor two 61, and a bevel gear two 631 meshing with the bevel gear one 622 is provided at one end of the driving shaft 63.

[0050] Working principle of driving mechanism 6: In order to meet the requirement of oblique setting of fixing frame 71, the structure of driving mechanism 6 is improved, motor 2 61 drives gear 3 611 to rotate, and gear 3 611 is meshed with gear 4 621 to make transmission shaft 62 rotate, and bevel gear 1 622 is meshed with bevel gear 2 631 to make driving shaft 63 rotate, so as to drive grinding mechanism 8 and fine grinding mechanism 9. Fixing frame 71 is obliquely set, so that the working ends of grinding mechanism 8 and fine grinding mechanism 9 are both oblique. When performing assembly hole grinding, the end face of injection molded part is perpendicular to the grinding axis through displacement mechanism 3. At this time, injection molded part is tilted. During grinding, workers can conveniently observe the grinding effect, and can also observe through camera 712.

[0051] Combined with Figure 2 and attached Figure 4 As shown, the displacement mechanism 3 includes a motor 31, a turntable 32, an external frame 33 and an elliptical turntable 34. A rotating column 321 is provided at the bottom of the turntable 32 for rotationally cooperating with the base 1. A gear 2 322 is provided on the rotating column 321. A gear 1 311 meshing with the gear 2 322 is provided at the output end of the motor 31. Two external frames 33 are symmetrically arranged on both sides of the turntable 32. The elliptical turntable 34 is rotatably arranged on the external frame 33. A cylinder 35 is hingedly provided on the turntable 32. The output end of the cylinder 35 is hingedly connected to the elliptical turntable 34. A plurality of clamping mechanisms 4 are provided on the elliptical turntable 34.

[0052] Working principle of displacement mechanism 3: when it is necessary to perform multi-angle grinding on the injection molded part, motor 1 31 is started, and through the meshing of gear 1 311 and gear 2 322, the turntable 32 is driven to rotate, so that the elliptical rotating frame 34 and the clamping mechanism 4 rotate around the axis of the rotating column 321, so as to adjust the horizontal position of the injection molded part. At the same time, cylinder 3 35 is extended and retracted according to the grinding requirements, and the elliptical rotating frame 34 is pushed to rotate on the external frame 33 to adjust the inclination angle of the injection molded part. The clamping mechanism 4 can position the injection molded part to a position suitable for grinding. Through the rotation of the turntable 32 and the angle adjustment of the elliptical rotating frame 34, it is ensured that the grinding mechanism 5 can perform all-round and multi-angle grinding on the assembly holes of the injection molded parts.

[0053] Combined with Figure 4 , Attachment Figure 5 and attached Figure 6As shown, the clamping mechanism 4 includes a rotating seat 41, an extension rod 42, a pin 43, a cylinder four 44, a pressing platform 45 and an external expansion member 46. The rotating seat 41 is rotatably arranged on the elliptical rotating frame 34, and the rotating seat 41 is fixed on the elliptical rotating frame 34 by tightening the bolt 411. The extension rod 42 passes through the through hole on the rotating seat 41, and a plurality of plug holes 421 are evenly arranged on the extension rod 42. The pin 43 passes through the through hole on the top of the rotating seat 41 and is inserted into the plug hole 421. The cylinder four 44 and the pressing platform 45 are respectively hinged to the extension rod 42, and the output end of the cylinder four 44 is hinged to the pressing platform 45. A placing platform 422 is provided at the end of the extension rod 42, and an insert sleeve 423 is provided on the placing platform 422. The external expansion member 46 is arranged in the insert sleeve 423 to position the positioning hole of the injection molded part.

[0054] Working principle of clamping mechanism 4: rotating seat 41 is freely rotatable and arranged on elliptical rotating frame 34, and the angle of extension rod 42 is adjusted, and it is fixed by tightening bolt 411. Extension rod 42 and rotating seat 41 are pinned by pin shaft 43, and the length of extension rod 42 is adjusted. When injection molded parts are loaded, the position of insert cylinder 423 is adjusted by adjusting extension rod 42, so that insert cylinder 423 can be inserted into the positioning hole of injection molded parts, and then cylinder four 44 pushes pressing platform 45 downward to press outward expansion part 46, which prevents injection molded parts from leaving placement platform 422 on the one hand, and drives outward expansion part 46 on the other hand to accurately position and fix the positioning hole of injection molded parts.

[0055] Combined with Figure 5 , Attachment Figure 6 and attached Figure 7 As shown, the expansion member 46 includes a lifting rod 461 that slides axially in the inner through hole of the insert cylinder 423 and an expansion platform 464 that slides radially in the side through hole of the insert cylinder 423. The top of the lifting rod 461 cooperates with the pressing platform 45, and the bottom is provided with a spring 463 connected to the bottom of the placement platform 422. The lifting rod 461 is provided with a slope 1 462, and the inner side of the expansion platform 464 is provided with a slope 2 465 that slides with the slope 1 462, and the outer top of the expansion platform 464 is provided with a slope 3 466.

[0056] Working principle of the external expansion part 46: the pressing platform 45 presses down the lifting rod 461 to make the lifting rod 461 descend. During the descending process, the multiple external expansion platforms 464 are synchronously moved radially through the cooperation of the inclined surface 1 462 and the inclined surface 2 465 until the outer side of the external expansion platform 464 contacts the positioning hole to achieve precise positioning and fixing. The lifting rod 461 is reset by the spring 463. When the next injection molded part is loaded, the external expansion platform 464 is reset through the cooperation of the positioning hole and the inclined surface 3 466.

[0057] Combined with Figure 2 and attached Figure 3As shown, the moving mechanism 2 includes a moving frame 21 that moves left and right on the base 1, a moving frame 22 that moves forward and backward is provided on the moving frame 21, a cylinder 23 is provided on the inner side of the top of the moving frame 22, a lifting frame 24 that is pushed up and down by the cylinder 23 is provided on the moving frame 22, a cylinder 25 is provided on the inner side of one end of the lifting frame 24, and a mounting frame 26 that is pushed left and right by the cylinder 25 is provided at one end of the lifting frame 24, and a fixed frame 71 is obliquely fixed to the end of the mounting frame 26.

[0058] Working principle of mobile mechanism 2: When the injection molded parts need to be polished, first adjust the horizontal position of the polishing mechanism 5 by moving the mobile frame 1 21 left and right, then adjust the front and rear position of the polishing mechanism 5 by moving the mobile frame 2 22 forward and backward, then push the lifting frame 24 up and down by the extension and retraction of the cylinder 1 23 to adjust the height of the polishing mechanism 5, finally push the mounting frame 26 left and right by the extension and retraction of the cylinder 2 25 to fine-tune the horizontal position of the polishing mechanism 5 to ensure that the grinding head 83 or the fine grinding head 922 can be accurately aligned with the assembly hole of the injection molded part. Through the multi-directional adjustment of the mobile mechanism 2, the polishing mechanism 5 can achieve precise positioning and movement to ensure the polishing quality and efficiency of the assembly holes of the injection molded parts.

[0059] During the specific implementation of the present invention, the injection molded part is placed on the placement table 422 of the clamping mechanism 4, the positioning hole of the injection molded part is accurately positioned and fixed by the external expansion part 46, the angle and position of the injection molded part is adjusted by the displacement mechanism 3, the motor 1 31 drives the turntable 32 to rotate and adjusts the horizontal position; the cylinder 3 35 drives the elliptical rotating frame 34 to rotate and adjusts the inclination angle to ensure that the injection molded part is aligned with the working end of the grinding mechanism 5, and the position of the grinding mechanism 5 is adjusted by the moving mechanism 2 to ensure that the grinding head 83 or the fine grinding head 922 is accurately aligned with the assembly hole of the injection molded part. During rough grinding, the displacement mechanism 7 moves the grinding displacement frame 72 to the front end of the fixed frame 71, so that the driving mechanism 6 drives the grinding mechanism 8 to perform shaping rough grinding operations. During fine grinding, the displacement mechanism 7 moves the fine grinding displacement frame 73 to the front end of the fixed frame 71, so that the driving mechanism 6 drives the fine grinding mechanism 9 to perform fine grinding.

[0060] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. A device for polishing assembly holes of injection molded parts, comprising a base (1), a moving mechanism (2) and a displacement mechanism (3) being provided on the base (1), a polishing mechanism (5) being provided on the moving mechanism (2), and a clamping mechanism (4) for fixing the injection molded parts being provided on the displacement mechanism (3), characterized in that: The grinding mechanism (5) comprises a driving mechanism (6), a position changing mechanism (7), a grinding mechanism (8) and a fine grinding mechanism (9); The driving mechanism (6) comprises a second motor (61) and a driving shaft (63), and the output end of the second motor (61) drives the driving shaft (63) to rotate; The shifting mechanism (7) comprises a fixed frame (71), a grinding shifting frame (72) and a fine grinding shifting frame (73); the fixed frame (71) is fixedly connected to the moving mechanism (2); the driving shaft (63) is rotatably arranged in the fixed frame (71); the grinding shifting frame (72) and the fine grinding shifting frame (73) are arranged on both sides of the fixed frame (71); the grinding mechanism (8) and the fine grinding mechanism (9) are respectively arranged in the grinding shifting frame (72) and the fine grinding shifting frame (73); The grinding displacement frame (72) and the fine grinding displacement frame (73) are changed in position by the position change mechanism (7), so that the driving shaft (63) drives the grinding mechanism (8) and the fine grinding mechanism (9) to work respectively, thereby completing the shaping and fine grinding operations of the assembly hole of the injection molded part respectively.

2. The device for polishing assembly holes of injection molded parts according to claim 1, characterized in that: The shifting mechanism (7) also includes a shifting rod (74), a motor three (711) is arranged outside the fixed frame (71), and the ends of two parallel shifting rods (74) are respectively hinged to the grinding shifting frame (72) and the fine grinding shifting frame (73), one of the shifting rods (74) is hinged to the fixed frame (71), and the other is connected to the output end of the motor three (711).

3. The device for polishing assembly holes of injection molded parts according to claim 1, characterized in that: The fine grinding mechanism (9) comprises a fine grinding transmission rod (91) and a fine grinding shaft (92) rotatably arranged on a fine grinding displacement frame (73); the fine grinding transmission rod (91) and the fine grinding shaft (92) are in transmission cooperation; one end of the fine grinding transmission rod (91) is provided with a gear seven (911) meshing with a gear five (632) at the end of the driving shaft (63); and one end of the fine grinding shaft (92) is provided with a fine grinding head (922).

4. The device for polishing assembly holes of injection molded parts according to claim 3, characterized in that: A fine grinding transmission rod (91) is provided with a bevel gear three (912) and a spline shaft (913); a fine grinding shaft (92) is provided with a spline groove (921) matched with the spline shaft (913); a fine grinding displacement frame (73) is rotatably provided with a bevel gear four (93) meshing with the bevel gear three (912); an eccentric wheel (94) is coaxially connected to one side of the bevel gear four (93); a fine grinding shaft (92) is rotatably provided with a transmission ring platform (96); a swing rod (95) is hingedly provided on the outer side of the transmission ring platform (96); and the eccentric wheel (94) is rotatably matched with a groove at the end of the swing rod (95).

5. The device for polishing assembly holes of injection molded parts according to claim 4, characterized in that: The fine grinding displacement frame (73) is provided with an upper limit frame (731) rotatably matched with the fine grinding transmission rod (91), the fine grinding displacement frame (73) is provided with two lower limit frames (732) slidably matched with the fine grinding shaft (92), the transmission ring platform (96) is arranged between the two lower limit frames (732), the fine grinding displacement frame (73) is provided with an external fixing rod (733), and the bevel gear four (93) is rotatably arranged on the external fixing rod (733).

6. The device for polishing assembly holes of injection molded parts according to claim 1, characterized in that: The grinding mechanism (8) comprises a grinding transmission rod (81) rotatably arranged on a grinding displacement frame (72); a sixth gear (82) meshing with a fifth gear (632) at the end of a driving shaft (63) is arranged at one end of the grinding transmission rod (81); a grinding head (83) is arranged at the other end; the grinding head (83) comprises a mounting platform (831), a grinding straight knife (832) and two grinding bevel knives (833); the mounting platform (831) is arranged at the end of the grinding transmission rod (81); the grinding straight knife (832) and the two grinding bevel knives (833) are respectively fixedly mounted on two mounting surfaces of the mounting platform (831) by bolts; and the two grinding bevel knives (833) are symmetrically arranged.

7. The device for polishing assembly holes of injection molded parts according to claim 1, characterized in that: The fixing frame (71) is arranged obliquely, and the driving mechanism (6) further comprises a transmission shaft (62), on which a gear four (621) and a bevel gear one (622) are arranged, and an output end of the motor two (61) is provided with a gear three (611) meshing with the gear four (621), and one end of the driving shaft (63) is provided with a bevel gear two (631) meshing with the bevel gear one (622).

8. The device for polishing assembly holes of injection molded parts according to claim 1, characterized in that: The displacement mechanism (3) comprises a motor 1 (31), a rotating disk (32), an external frame (33) and an elliptical rotating frame (34); a rotating column (321) rotatably matched with the base (1) is provided at the bottom of the rotating disk (32); a gear 2 (322) is provided on the rotating column (321); a gear 1 (311) meshing with the gear 2 (322) is provided at the output end of the motor 1 (31); two external frames (33) are symmetrically arranged on both sides of the rotating disk (32); the elliptical rotating frame (34) is rotatably arranged on the external frame (33); a cylinder 3 (35) is hingedly arranged on the rotating disk (32); the output end of the cylinder 3 (35) is hingedly connected to the elliptical rotating frame (34); and a plurality of clamping mechanisms (4) are arranged on the elliptical rotating frame (34).

9. The device for polishing assembly holes of injection molded parts according to claim 8, characterized in that: The clamping mechanism (4) comprises a rotating seat (41), an extension rod (42), a cylinder four (44), a pressing platform (45) and an external expansion member (46); the rotating seat (41) is rotatably arranged on the elliptical rotating frame (34); the extension rod (42) passes through a through hole on the rotating seat (41) and is pin-connected with the rotating seat (41); the cylinder four (44) and the pressing platform (45) are respectively hinged to the extension rod (42); the output end of the cylinder four (44) is hinged to the pressing platform (45); a placement platform (422) is provided at the end of the extension rod (42); an insert tube (423) is provided on the placement platform (422); the external expansion member (46) is arranged in the insert tube (423) to position the positioning hole of the injection molded part.

10. The device for polishing assembly holes of injection molded parts according to claim 9, characterized in that: The expansion member (46) includes a lifting rod (461) that slides axially in the inner through hole of the insert tube (423) and an expansion platform (464) that slides radially in the side through hole of the insert tube (423). The top of the lifting rod (461) cooperates with the pressing platform (45), and the bottom is provided with a spring (463) connected to the bottom of the placement platform (422). The lifting rod (461) is provided with an inclined surface 1 (462), and the inner side of the expansion platform (464) is provided with an inclined surface 2 (465) that slides with the inclined surface 1 (462).

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