Metal plate polishing equipment

Abstract

The invention relates to the field of polishing equipment, in particular to sheet metal polishing equipment which comprises a conveying belt, the conveying belt is used for conveying sheet metal parts, and the polishing faces of the sheet metal parts face upwards; the lifting carrying frame is arranged above the conveying belt in a crossing manner; a front row of millstones and a rear row of millstones are arranged below the lifting carrying frame in a staggered manner, so that the two rows of millstones transversely cover the surface of the conveying belt; the front row and the rear row of pressing rod assemblies are rotationally connected with the lifting carrying frame. The grinding discs are connected to the bottom ends of the pressing rod assemblies one by one through universal joints. The two rows of grinding discs which are transversely distributed in a staggered mode are arranged to transversely cover the surface of the sheet metal part, the angle of the grinding discs is dynamically adjusted through the universal joints according to the surface of the sheet metal part so that the grinding discs can be flatly attached to the sheet metal part, and the grinding discs can rotate and polish the sheet metal part evenly; and polishing dead angles are reduced to the maximum extent.

Description

Technical Field

[0001] The invention relates to the field of polishing equipment, in particular to sheet metal polishing equipment. Background Art

[0002] Metal sheet metal polishing is used to remove scratches, sand holes and other defects on the surface of the sheet metal, improve the gloss, flatness and aesthetics of the sheet metal surface, and facilitate subsequent processing of the sheet metal surface. Handheld polishing is still a common polishing method. Automated polishing is mainly used for sheet metal with regular surfaces. Traditional polishing equipment uses a rotating polishing disc to contact the sheet metal surface for polishing. The quality of polishing is directly related to the polishing angle of the polishing disc. The polishing disc has a better polishing effect when it is in positive contact with the sheet metal surface. It is difficult to implement uniform coverage automated polishing for large-area, irregular-surface sheet metal. Summary of the invention

[0003] The purpose of the present invention is to solve the following problems existing in the prior art: the traditional polishing equipment uses a rotating polishing disc to contact the sheet metal surface for polishing, the quality of polishing is directly related to the polishing angle of the polishing disc, and the polishing disc has a better polishing effect when it contacts the sheet metal surface positively. It is difficult to implement uniform coverage automatic polishing for large-area and irregular-surface sheet metals.

[0004] In order to solve the problems existing in the prior art, the present invention provides a sheet metal polishing device, comprising a conveyor belt, the conveyor belt is used to conduct the sheet metal parts, and the polishing surface of the sheet metal parts faces upward; A lifting carrier, which is arranged across the conveyor belt; Grinding discs: two rows of grinding discs are arranged below the lifting carrier, and the two rows of grinding discs are staggered so that the two rows of grinding discs cover the surface of the conveyor belt horizontally; The pressure rod assembly, the front and rear rows of pressure rod assemblies are rotatably connected to the lifting carrier, and the grinding discs are connected to the bottom ends of the pressure rod assemblies one by one through universal joints; The motor is connected to each pressure rod assembly through a belt drive and is used to drive all grinding discs to rotate synchronously and at the same speed.

[0005] Preferably, the pressure rod assembly includes an insert cylinder, which is rotatably connected to the lifting carrier, a piston is slidably adapted inside the insert cylinder, the insert rod is inserted into the interior of the insert cylinder from the bottom of the insert cylinder and connected to the piston, the surface of the insert rod has a sliding key to limit the twisting between the insert rod and the insert cylinder, the grinding disc is connected to the bottom end of the insert rod through a universal joint, the piston isolates the upper part of the inner cavity of the insert cylinder into a closed chamber, and the closed chamber is connected to a pneumatic assembly.

[0006] Preferably, the pneumatic assembly includes an air tank, a rotary joint is provided on the top of the insert, the air tank is connected to the closed chamber through a hose and a rotary joint, an air pump is used to supply air to the air tank, a constant pressure valve and an air pressure sensor are provided on the surface of the air tank, and the air pressure sensor is connected to the air pump through a controller.

[0007] Preferably, the lifting carrier includes an integrated box, the left and right sides of which are maintained in vertical sliding with the conveyor belt through sliding rods, the cylinder is used to drive the integrated box to move up and down, a connecting rod frame is arranged in the integrated box, and the pressure rod assembly is rotatably supported by the connecting rod frame.

[0008] Preferably, the connecting rod frame includes a plurality of bars, two bars are cross-rotated at the center to form a group of cross frames, multiple cross frames are distributed left and right and the ends are rotatably connected to form a connecting rod frame, the center and rear end of the bar are provided with sleeves, and the front and rear rows of pressure rod assemblies are respectively rotatably arranged in the middle sleeve of the bar and the rear end sleeve of the bar.

[0009] Preferably, a base plate is fixed in the middle of the integrated box, and the center point of the cross frame in the middle position is positioned and rotatably connected to the base plate. Retaining frames are provided on both sides of the integrated box, and the retaining frames slide left and right with the integrated box through sliders and slide rails. The surface of the retaining frame has a slideway extending forward and backward, and guide columns are provided on the surfaces of the two bars of the same cross frame, and the guide columns are slidably inserted into the slideway.

[0010] Preferably, a spring is connected between two adjacent hinge points at the front end of the connecting rod frame, so that the connecting rod frame has a tendency to move closer to the left and right. A cam is rotatably arranged on the surface of the substrate, and the cam is connected to the motor through a belt drive. An adjustment component is connected to a hinge point at the front end of the connecting rod frame, and the cam squeezes and contacts the adjustment component to resist the elastic contraction of the connecting rod frame to the left and right.

[0011] Preferably, the adjustment assembly includes a straight handle and a push handle distributed on the left and right, and the straight handle and the push handle both slide left and right in the integrated box through sliders and slide rails, the screw thread penetrates the straight handle and is rotatably connected to the push handle, the cam squeezes and contacts the push handle, the surface of the straight handle has a limit groove extending forward and backward, the hinge point at the front end of the connecting rod frame is connected to the limit column, and the limit column is slidably inserted into the limit groove.

[0012] Compared with the related art, the sheet metal polishing equipment provided by the present invention has the following beneficial effects: 1. The present invention sets two rows of grinding discs with transverse dislocation to transversely cover the surface of the sheet metal part. The grinding discs are dynamically adjusted according to the surface of the sheet metal part through universal joints to flatly contact the sheet metal part, so that the grinding discs can rotate and polish the sheet metal part more evenly, thereby minimizing the polishing dead angles. 2. The connecting rod frame of the present invention is in a continuous parallelogram grid shape. The cam rotates to resist the adjustment component and cooperates with the elastic force of the spring to make the connecting rod frame expand and contract periodically. The two rows of grinding discs move back and forth in the left and right directions, and the grinding discs in the rear row move back and forth in the front and back directions. Cooperating with the rotation of the grinding discs themselves, a reciprocating push-and-rub grinding and polishing effect is achieved, so that the surface polishing of the sheet metal parts is more uniform. 3. The air pressure between the pressure rod assembly and the gas tank of the present invention is connected. The air pump is used to replenish air to the gas tank and the constant pressure valve is used to exhaust air, so that the gas tank provides a relatively constant air pressure to the pressure rod assembly, so that all grinding discs apply the same and constant pressure to different parts of the sheet metal, thereby improving the uniform polishing effect on the sheet metal surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the grinding disc distribution structure of the present invention; Figure 3 This is one of the schematic diagrams of the internal structure of the integrated box of the present invention; Figure 4 This is the second schematic diagram of the internal structure of the integrated box of the present invention; Figure 5 It is a schematic diagram of the transmission connection structure of the pressure rod assembly of the present invention; Figure 6 It is a schematic diagram of the connecting rod frame structure of the present invention; Figure 7 It is a schematic diagram of the structure of the bar connecting retainer of the present invention; Figure 8 It is a schematic diagram of the structure of the pressure rod assembly of the present invention; Fig. 9 It is a schematic diagram of the structure of the air pressure component of the present invention; Fig.10 It is a schematic diagram of the structure of the regulating component of the present invention.

[0014] Numbers in the figure: 1. integrated box; 11. cylinder; 12. slide rod; 13. base plate; 14. retaining frame; 15. slideway; 16. guide column; 17. infrared sensor; 2. conveyor belt; 3. grinding disc; 31. universal joint; 4. pressure rod assembly; 41. plug rod; 42. piston; 43. insert cylinder; 44. slide key; 45. rotary joint; 5. motor; 6. connecting rod frame; 61. bar; 62. bushing; 7. adjustment assembly; 71. straight handle; 72. push handle; 73. limit groove; 74. limit column; 75. screw; 76. cam; 8. pneumatic assembly; 81. gas tank; 82. air pump; 83. constant pressure valve; 84. air pressure sensor; 85. hose. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0017] like Figure 1 As shown, the sheet metal polishing equipment is used to transport the sheet metal parts from front to back by the conveyor belt 2. The lifting carrier includes an integrated box 1. The integrated box 1 is directional with a hollow bottom. The integrated box 1 is arranged horizontally above the middle of the conveyor belt 2. The left and right sides of the conveyor belt 2 are symmetrically fixed with sliding bars 12. The integrated box 1 can slide vertically along the sliding bars 12. The left and right sides of the integrated box 1 are installed with cylinders 11. The telescopic ends of the cylinders 11 are connected to the two sides of the conveyor belt 2. The front side of the integrated box 1 is installed with an infrared sensor 17, and the infrared sensor 17 is connected to the cylinder 11 through a controller. like Figure 2 As shown, the connecting rod frame 6 is arranged inside the integrated box 1, and two rows of grinding discs 3 are arranged below the integrated box 1. The front and rear rows of grinding discs 3 are staggered so that the two rows of grinding discs 3 cover the surface of the conveyor belt 2 horizontally. The front and rear rows of pressure rod assemblies 4 are rotatably installed on the surface of the connecting rod frame 6. The integrated box 1 is connected to the bottom ends of the pressure rod assemblies 4 one by one through the universal joint 31. The surface of the integrated box 1 is installed with a motor 5, and the motor 5 is connected to each pressure rod assembly 4 through a belt drive. The sheet metal to be polished is transported backward by the conveyor belt 2, with the polishing surface of the sheet metal facing up. The infrared sensor 17 detects that the sheet metal has arrived at the bottom of the integrated box 1, and the controller controls the cylinder 11 to descend. At the same time, the motor 5 is turned on to drive each pressure rod assembly 4 to rotate synchronously and at the same speed. The rotating grinding wheel 3 is attached to the surface of the sheet metal to polish it. The angle of the grinding wheel 3 is adjusted to conform to the surface shape of the sheet metal through the universal joint 31, so that the grinding wheel 3 can always be flat against the surface of the sheet metal to ensure uniform polishing.

[0018] like Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown, the connecting rod frame 6 is composed of a plurality of bars 61, two bars 61 are cross-rotated at the center to form a group of cross frames, and a plurality of cross frames are distributed left and right and the ends are hinged to form the connecting rod frame 6, the outline of the connecting rod frame 6 is a continuous parallelogram, the center part and the rear end of each bar 61 are provided with a sleeve 62, the front and rear rows of pressure rod assemblies 4 are respectively rotatably arranged in the middle sleeve 62 of the bar 61 and the rear end sleeve 62 of the bar 61, the base plate 13 is fixed in the middle of the integrated box 1, the center point of the cross frame in the middle position is positioned and rotatably connected with the base plate 13, retaining frames 14 are arranged on both sides of the integrated box 1, the front and rear inner walls of the integrated box 1 are fixed with slide rails, the retaining frame 14 slides left and right along the slide rails through sliders, the surface of the retaining frame 14 has a slideway 15 extending front and back, the surfaces of the two bars 61 of the same cross frame are provided with guide columns 16, and the guide columns 16 are slidably inserted into the slideway 15; Since the cross frames are hinged, when the angle of one group of cross bars 61 changes, all the cross frames change synchronously. When the entire connecting rod frame 6 contracts in the left and right directions, its front and back dimensions become larger. When the connecting rod frame 6 expands in the left and right directions, its front and back dimensions become smaller. The shape change of the connecting rod frame 6 is used to adjust the position distribution of each grinding disc 3.

[0019] like Figure 3 , Figure 4 , Figure 5 As shown, a spring is connected between two adjacent hinge points at the front end of the connecting rod frame 6, so that the connecting rod frame 6 has a tendency to move closer to the left and right. A cam 76 is rotatably installed on the surface of the base plate 13. The cam 76 is connected to the motor 5 through a belt drive. An adjustment component 7 is connected to a hinge point at the front end of the connecting rod frame 6. The cam 76 presses and contacts the adjustment component 7. The motor 5 is installed at the center position of the front part of the integrated box 1. The pressure rod assembly 4 at the center position of the front row is directly connected to the output shaft of the motor 5 through a belt, and then the adjacent pressure rod assemblies 4 are connected through a belt transmission distributed along the bar 61. When the connecting rod frame 6 is contracted or expanded, the power transmission between the various pressure rod assemblies 4 is not affected.

[0020] The connecting rod frame 6 is subjected to the lateral pulling force of the front spring and has a tendency to retract. The cam 76 resists the adjusting component 7 to prevent the connecting rod frame 6 from retracting, so that the connecting rod frame 6 maintains a fixed shape. When polishing is carried out, the motor 5 synchronously drives the cam 76 to rotate, and the cam 76 pushes the adjusting component 7 to move slightly left and right. With the elastic force of the spring, the connecting rod frame 6 undergoes a periodic expansion and contraction movement, so that the two rows of grinding discs 3 reciprocate in the left and right directions, and the rear row of grinding discs 3 reciprocates in the front and back directions. With the rotation of the grinding discs 3 themselves, a reciprocating push-and-rub grinding and polishing effect is achieved, so that the surface polishing of the sheet metal is more uniform.

[0021] like Fig.10 As shown, the adjustment assembly 7 is composed of a straight handle 71 and a push handle 72 distributed on the left and right. The straight handle 71 and the push handle 72 slide left and right through the slider and the slide rail. The screw 75 threadedly penetrates the straight handle 71 and is rotatably connected with the push handle 72, so that the straight handle 71 and the push handle 72 are connected as a whole. The cam 76 presses and contacts the push handle 72. The surface of the straight handle 71 has a limit groove 73 extending forward and backward. The hinge point at the front end of the connecting rod frame 6 is connected to a limit column 74, and the limit column 74 is slidably inserted into the limit groove 73. The straight handle 71 and the push handle 72 are locked together by the screw rod 75, and the cam 76 pushes the push handle 72 and drives the straight handle 71 to slide left and right, and the limit column 74 is pushed to move left and right through the limit groove 73, so as to drive the connecting rod frame 6 to expand or contract in the left and right directions. In this process, the limit column 74 slides back and forth in the limit groove 73 to balance the dimensional change of the connecting rod frame 6 in the front and rear directions; By rotating the screw 75 to adjust the distance between the push handle 72 and the straight handle 71, the limit groove 73 limits the left and right position of the limit column 74, so that the expansion range of the connecting rod frame 6 changes, which is used to adjust the lateral distribution size of the grinding wheel 3 for sheet metal parts of different widths, but it is necessary to ensure that there is no grinding gap between the two groups of grinding wheels 3 when they are expanded to the maximum extent in the lateral direction, so as to ensure full coverage of grinding in the left and right directions.

[0022] The grinding pressure of the grinding disc 3 is controlled as follows: like Figure 8 As shown, the pressure rod assembly 4 includes an insert cylinder 43, which is rotatably connected to the shaft sleeve 62 of the connecting rod frame 6, and a piston 42 is slidably adapted in the insert cylinder 43. The insert rod 41 is inserted into the insert cylinder 43 from the bottom thereof and is fixedly connected to the piston 42. The surface of the insert rod 41 has a sliding key 44 for limiting the twisting between the insert rod 41 and the insert cylinder 43. The grinding disc 3 is connected to the bottom end of the insert rod 41 through a universal joint 31. The piston 42 isolates the upper part of the inner cavity of the insert cylinder 43 into a closed chamber, and the closed chamber is connected to the air pressure assembly 8. like Figure 3 , Fig. 9 As shown, the air pressure assembly 8 includes an air tank 81, a rotating joint 45 is provided on the top of the insert 43, the air tank 81 is connected to the closed chamber through a hose 85 and the rotating joint 45, an air pump 82 is used to supply air to the air tank 81, and a constant pressure valve 83 and an air pressure sensor 84 are provided on the surface of the air tank 81, and the air pressure sensor 84 is connected to the air pump 82 through a controller; The air tank 81 is inflated by the air pump 82, and the pressure value in the air tank 81 is monitored by the air pressure sensor 84. The closed chamber in the insert 43 is connected with the air tank 81 to maintain the same air pressure. Since the air pressure in each closed chamber is the same, the pressure exerted by the grinding disc 3 on the surface of the sheet metal is the same, thereby achieving uniform polishing and grinding of the sheet metal. Since the height of the irregular surface of the sheet metal is different, the extension and contraction amount of each insert rod 41 changes dynamically during the polishing process, and the volume of the closed chamber also changes dynamically, so that the air pressure value in the air tank 81 also changes dynamically. The air pressure value in the air tank 81 is monitored by the air pressure sensor 84. When the insert rod 41 contracts excessively and squeezes the closed chamber, the pressure value in the air tank 81 rises beyond the set range, and the constant pressure valve 83 exhausts the air to reduce the air pressure in the air tank 81 to the set range. When the air pressure in the air tank 81 drops beyond the set range, the air pump 82 inflates the air tank 81, thereby achieving a constant pressure range in the air tank 81, and all grinding discs 3 maintain a relatively constant polishing pressure.

Claims

1. Sheet metal polishing equipment, It is characterized in that include: A conveyor belt (2), the conveyor belt (2) is used to convey the sheet metal parts, and the polished surface of the sheet metal parts faces upward; A lifting carrier, the lifting carrier being arranged across the top of the conveyor belt (2); Grinding discs (3), two rows of grinding discs (3) are arranged below the lifting carrier, and the two rows of grinding discs (3) are staggered so that the two rows of grinding discs (3) cover the surface of the conveyor belt (2) laterally; A pressure rod assembly (4), wherein the front and rear rows of pressure rod assemblies (4) are rotatably connected to the lifting frame, and the grinding discs (3) are connected one by one to the bottom ends of the pressure rod assemblies (4) through universal joints (31); A motor (5), the motor (5) is connected to each pressure rod assembly (4) via a belt drive, and is used to drive all grinding discs (3) to rotate synchronously and at the same speed; The pressure rod assembly (4) comprises an insert cylinder (43), the insert cylinder (43) is rotatably connected to the lifting carrier, a piston (42) is slidably adapted inside the insert cylinder (43), the insert rod (41) is inserted into the insert cylinder (43) from the bottom thereof and connected to the piston (42), the surface of the insert rod (41) has a sliding key (44) for limiting the twisting between the insert rod and the insert cylinder (43), the grinding disc (3) is connected to the bottom end of the insert rod (41) via a universal joint (31), the piston (42) isolates the upper part of the inner cavity of the insert cylinder (43) into a closed chamber, and the closed chamber is connected to the air pressure assembly (8); The air pressure assembly (8) comprises an air tank (81). A rotating joint (45) is arranged on the top of the insert (43). The air tank (81) is connected to the closed chamber via a hose (85) and the rotating joint (45). The air pump (82) is used to supply air into the air tank (81). A constant pressure valve (83) and an air pressure sensor (84) are arranged on the surface of the air tank (81). The air pressure sensor (84) is connected to the air pump (82) via a controller.

2. The sheet metal polishing equipment according to claim 1, It is characterized in that The lifting carriage comprises an integrated box (1), the left and right sides of the integrated box (1) are kept in vertical sliding relationship with the conveyor belt (2) via sliding rods (12), the cylinder (11) is used to drive the integrated box (1) to move up and down, a connecting rod frame (6) is arranged in the integrated box (1), and the pressure rod assembly (4) is rotatably supported by the connecting rod frame (6).

3. The sheet metal polishing equipment according to claim 2, It is characterized in that The connecting rod frame (6) comprises a plurality of bars (61), two bars (61) are cross-rotated at the center to form a group of cross frames, a plurality of cross frames are distributed left and right and the ends are rotatably connected to form the connecting rod frame (6), the center part and the rear end of the bar (61) are provided with shaft sleeves (62), and the front and rear rows of pressure rod assemblies (4) are respectively rotatably arranged in the shaft sleeves (62) in the middle of the bar (61) and the shaft sleeves (62) at the rear end of the bar (61).

4. The sheet metal polishing equipment according to claim 3, It is characterized in that The integrated box (1) has a fixed base plate (13) in the middle, and the center point of the cross frame in the middle is connected to the base plate (13) in a positioning and rotational manner. The integrated box (1) has retaining frames (14) disposed on both sides thereof. The retaining frames (14) slide left and right with the integrated box (1) via sliders and slide rails. The surface of the retaining frames (14) has a slideway (15) extending forward and backward. The surfaces of the two bars (61) of the same cross frame have guide posts (16) disposed thereon, and the guide posts (16) are slidably inserted into the slideways (15).

5. The sheet metal polishing device according to claim 4, It is characterized in that A spring is connected between two adjacent hinge points at the front end of the connecting rod frame (6), so that the connecting rod frame (6) has a tendency to move closer to the left and right. A cam (76) is rotatably arranged on the surface of the base plate (13), and the cam (76) is connected to the motor (5) via a belt drive. An adjustment component (7) is connected to a hinge point at the front end of the connecting rod frame (6), and the cam (76) presses and contacts the adjustment component (7) to resist the elastic contraction of the connecting rod frame (6) to the left and right.

6. The sheet metal polishing device according to claim 5, It is characterized in that The adjustment assembly (7) comprises a straight handle (71) and a push handle (72) distributed on the left and right. The straight handle (71) and the push handle (72) are both slidable on the left and right inside the integrated box (1) via a slider and a slide rail. The screw rod (75) is threadedly passed through the straight handle (71) and is rotatably connected to the push handle (72). The cam (76) is pressed and contacted with the push handle (72). The surface of the straight handle (71) has a limit groove (73) extending forward and backward. The hinge point at the front end of the connecting rod frame (6) is connected to a limit column (74), and the limit column (74) is slidably inserted into the limit groove (73).

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