An intelligent inspection system for inner rings of spherical plain bearings

Abstract

The present invention discloses an intelligent sorting system for the inner ring of a spherical bearing, including a pushing mechanism, an oil hole deburring station, a cleaning and drying station, an inner diameter detection station, a manipulator and a sorting station. The pushing mechanism pushes the inner ring of the spherical bearing to be processed to the oil hole deburring station for oil hole deburring, and then it is clamped by a manipulator to the cleaning and drying station for cleaning and drying, and then it is clamped by a manipulator to the inner diameter detection station for inner diameter detection, and finally it is sent to the sorting station for sorting by a manipulator. The present invention is a comprehensive device that integrates automatic feeding, automatic deburring, automatic cleaning, automatic detection, and automatic rejection of defective products. The device has a compact structure and has the ability to completely replace manual inspection of part dimensions and memory and output of dimensions of all parts, completely replace the ability to manually clean parts, and completely replace the ability to manually burr oil holes.

Description

Technical Field

[0001] The invention relates to an intelligent sorting and inspection system for inner rings of spherical bearings. Background Art

[0002] After the initial production of the inner ring of the spherical bearing with oil holes, the oil hole burrs need to be treated, the size needs to be inspected after cleaning, and finally sorted. Currently, each step is carried out independently and mostly manually, which is inefficient and low in precision. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an intelligent inspection system for the inner ring of a spherical bearing.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] An intelligent inspection system for inner rings of spherical bearings, characterized in that it comprises:

[0006] A pushing mechanism, including a conveyor belt and a pushing rod;

[0007] An oil hole burring station comprises a first rotating base plate, a positioning optical fiber, a first rotating drive assembly, a first pressing assembly and an ejector assembly; the push rod pushes the inner ring on the conveyor belt onto the first rotating base plate; the positioning optical fiber sends the positioning information of the oil hole to the control system, and the control system controls the connection with the first rotating drive assembly; the first rotating drive assembly comprises a first motor and a first pressure head, the first pressing assembly drives the first rotating drive assembly downward so that the first pressure head presses against the inner ring on the first rotating base plate, and the first motor drives the first pressure head to rotate; the ejector assembly comprises a feed drive, an ejector and a potentiometer, the feed drive drives the ejector and the potentiometer to connect, one end of the ejector is mounted on the potentiometer, and the other end of the ejector can press against the outer wall of the inner ring, when the ejector sinks into the oil hole, the potentiometer sends information to the control system, the control system controls the rotating motor to stop rotating, and the feed drive drives the ejector to push into the oil hole to burr;

[0008] The washing and drying station comprises a second rotating bottom plate, a fixed bottom plate, an outer spray pipe, an inner spray head, a second rotating driving assembly and a second pressing assembly; the inner ring can be placed on the rotating bottom plate, and the inner spray head can extend from the bottom of the second rotating bottom plate into the inner ring; the second pressing assembly drives the second rotating driving assembly to move up and down; the second rotating driving assembly comprises a second motor and a second pressure head, the second motor can drive the second pressure head to rotate, the second pressure head can abut against the inner ring, the second pressure head is provided with a flow hole, when the second pressure head abuts against the inner ring, the cleaning liquid can flow from the inside of the inner ring to the outside through the flow hole, the outer spray pipe is arranged on the fixed bottom plate, and the spray hole of the outer spray pipe faces the outer ball of the inner ring; and

[0009] The inner diameter detection station includes a working base plate, a third rotating drive assembly, an inner diameter measuring assembly and a third pressing assembly. The third rotating drive assembly includes two driving wheels and an auxiliary wheel. The auxiliary wheel can move in the direction of the two driving wheels to clamp the inner ring on the working base plate. The rotation of the driving wheel drives the inner ring to rotate on the working base plate. The third pressing assembly drives the inner diameter measuring assembly to move downward. The inner diameter measuring assembly includes two measuring claws, two steel springs, an inductive pen and a steel rod. Each steel spring includes two left and right spring sheets and two upper and lower sliding blocks. The upper and lower sliding blocks are connected by the left and right spring sheets, the upper sliding block and the lower sliding block can slide relative to each other, the two measuring claws are respectively installed on the lower sliding blocks under the two steel springs, the inductive pen and the steel rod are respectively installed on the two lower sliding blocks, and the inductive pen measures the differential value of the distance between the two measuring claws; it also includes an auxiliary wheel driving part and a correction component, the auxiliary wheel driving part drives the auxiliary wheel to move up and down, the correction component includes a standard part, a gripping mechanism and a translation driving mechanism, the translation driving mechanism drives the gripping mechanism to translate to move the standard part to the working base plate;

[0010] The first rotating bottom plate, the second rotating bottom plate and the working bottom plate are in the same conveying direction;

[0011] Also includes:

[0012] A manipulator, comprising a left clamp, a right clamp, a clamping driver, a left-right moving driver, and a front-back moving driver, wherein the clamping driver drives the left and right clamps to move synchronously toward or in opposite directions, the left-right moving driver drives the left and right clamps to move left and right, and the front-back moving driver drives the left and right clamps to move forward and backward; the left and right clamps cooperate to transfer the inner rings on the first rotating base plate, the second rotating base plate, and the working base plate respectively; and

[0013] The sorting station includes a fixed plate, a lifting plate, a lifting drive, a pushing drive and a defective product collection box. The lifting plate is located in the middle of the fixed plate. The lifting drive drives the lifting plate to rise and fall. The lifting plate can rise and be connected to the defective product collection box. The pushing drive drives the parts on the lifting plate into the defective product collection box.

[0014] In another preferred embodiment, the first pressure head and / or the second pressure head and / or the driving wheel and / or the auxiliary wheel have an inverted conical rotating surface.

[0015] In another preferred embodiment, the positioning optical fiber is mounted on the first rotation driving assembly.

[0016] In another preferred embodiment, the positioning optical fiber is deflected 180°-195° relative to the ejector pin assembly.

[0017] In another preferred embodiment, the inner spray head is provided with a spray hole, and the spray direction of the spray hole is horizontal.

[0018] In another preferred embodiment, three steel balls distributed in a triangle are provided on the working base plate, and the inner ring is placed on the three steel balls.

[0019] In another preferred embodiment, the third rotation drive assembly further includes a tension spring, and the tension spring is connected between the auxiliary wheel and the two driving wheels.

[0020] In another preferred embodiment, a compression spring block and an insertion groove are provided on the sliding block under the steel spring, and screwing in a screw can press against the compression spring block, so that the compression spring block can compress the inductive pen or steel rod on the insertion groove.

[0021] In another preferred embodiment, the third rotary drive assembly further includes a motor, a driving gear and two driven gears, the motor drivingly connects to the driving gear, the driving gears respectively drively connect to the two driven gears, and the two driving wheels are respectively connected to the two driven gears.

[0022] In another preferred embodiment, the first rotary drive assembly and the first pressing assembly, the second rotary drive assembly and the second pressing assembly, and / or the third rotary drive assembly and the third pressing assembly are guided by sliders and guide rails, respectively.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention is a comprehensive device that integrates automatic feeding, automatic deburring, automatic cleaning, automatic detection, and automatic rejection of unqualified products. The device has a compact structure and has the functions of online intelligent completion of oil hole deburring and detection of parts, automatic cleaning of parts, detection of part size and shape and position tolerances, automatic transfer of parts, qualification determination of parts, and output of qualified products. The present invention has the ability to completely replace manual inspection of part size and memory and output of all part sizes, completely replace the ability to manually clean parts, and completely replace the ability to manually deburr oil holes;

[0025] 2. The present invention adopts light sensing plus inductance technology to realize the flexible burr removal function of replacing people with machines, solves the problem of asymmetric oil holes due to processing errors, which leads to the inability to remove burrs in the oil holes, and also indirectly measures the eligibility of the size of the oil holes, reduces human resources and labor costs, and improves production efficiency; the first pressure head has an inverted cone rotating surface, which is suitable for inner rings of different sizes.

[0026] 3. Use multi-dimensional cleaning and drying to improve cleaning efficiency and cleaning effect.

[0027] 4. Two driving wheels and one auxiliary wheel are used to form a triangle positioning, and the parts are positioned in it. When measuring, the bottom end face of the part is used as the positioning reference surface, which imitates the action of manual inspection, replaces the work content of manual inspection, and realizes the feasibility of high-precision automatic dimensional monitoring. The bottom end face of the part is placed on three steel balls to form a three-point plane parallel to the working base plate, ensuring point contact when the part rotates, solving the problem of the end face being disturbed by the flatness of the working base plate when the part rotates, and the problem of the stability of the part when the dirt is brought into the end face. The auxiliary wheel can move up and down, which is convenient for the standard part to enter the working base plate for inner diameter detection to obtain the standard part value, which is convenient for comparison and correction. The measuring claw is installed on the sliding block under the steel spring. The upper and lower sliding blocks of the steel spring can slide relatively, and the inductive pen is installed on the sliding block under the steel spring, so as to measure the differential value of the distance between the two measuring claws.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the intelligent inspection system for inner rings of spherical bearings of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0030] Figure 2 It is a structural schematic diagram of an oil hole deburring station according to a preferred embodiment of the present invention.

[0031] Figure 3 The present invention is a schematic structural diagram of an ejector pin and a potentiometer in an oil hole deburring station according to a preferred embodiment of the present invention.

[0032] Figure 4 It is a cross-sectional schematic diagram of a first pressure head of an oil hole deburring station according to a preferred embodiment of the present invention.

[0033] Figure 5 It is a structural schematic diagram of a washing and drying station in a preferred embodiment of the present invention.

[0034] Figure 6 It is a schematic diagram of the matching structure of the second rotary drive assembly and the inner spray head of a cleaning and drying station in a preferred embodiment of the present invention.

[0035] Figure 7 It is a schematic cross-sectional structure diagram of a washing and drying station according to a preferred embodiment of the present invention.

[0036] Figure 8 The structure of the inner diameter detection station of a preferred embodiment of the present invention is shown in FIG. Figure 1 .

[0037] Fig. 9 The structure of the inner diameter detection station of a preferred embodiment of the present invention is shown in FIG. Figure 2 .

[0038] Fig.10 It is a structural schematic diagram of an inner diameter measuring assembly of an inner diameter detection station according to a preferred embodiment of the present invention.

[0039] Fig.11 It is a schematic structural diagram of a manipulator according to a preferred embodiment of the present invention.

[0040] Fig.12 It is a structural schematic diagram of a sorting station of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0041] For example, see Figure 1 As shown, an intelligent sorting system for inner rings of spherical bearings of the present invention comprises a pushing mechanism 1, an oil hole burr removal station 2, a cleaning and drying station 3, an inner diameter detection station 4, a manipulator 5 and a sorting station 6. The pushing mechanism 1 pushes the inner ring of the spherical bearing to be processed to the oil hole burr removal station 2 for oil hole burr removal, and then the manipulator 5 clamps and delivers it to the cleaning and drying station 3 for cleaning and drying, and then clamps and delivers it to the inner diameter detection station 4 for inner diameter detection, and finally delivers it to the sorting station 6 for sorting by the manipulator 5. The structure and working principle of each station will be described in detail below.

[0042] The pushing mechanism 1 includes a conveyor belt 1-1 and a first pushing rod 1-2. After the parts enter the conveyor belt 1-1, they are transported to the feed port by the conveyor belt 1-1; the feed port sensor sends a part in place signal to the detection system. After the system obtains the signal, it notifies the first pushing rod 1-2 to push the parts forward, so that the parts enter the oil hole deburring station 2.

[0043] See also Figure 2 and Figure 3 As shown, the oil hole burring station includes a first rotating base plate 2-1, an oil hole positioning assembly 2-2, a first rotating drive assembly, a first pressing cylinder 2-4 and a ejector assembly; the oil hole positioning assembly 2-2 includes a positioning optical fiber, and the positioning optical fiber sends positioning information to the PLC system, which determines and controls the first rotating drive assembly. In this embodiment, the positioning optical fiber is installed on the first rotating drive assembly; the first rotating drive assembly includes a clamping motor 2-31 and a first pressing head 2-32, and the first pressing head 2-32 has an inverted conical rotating surface 2-321, as shown in FIG. Figure 4 As shown, the inverted conical rotating surface allows the part to be quickly positioned to the rotation center of the first pressure head 2-32, and the first downward pressure cylinder 2-4 drives the first rotation drive assembly downward so that the first pressure head 2-32 presses against the inner ring 2-6 of the joint bearing on the first rotating base plate 2-1. Specifically, the first rotation drive assembly is installed on a slider 2-71, and the slider 2-71 is slidably connected to the guide rail 2-72. The first downward pressure cylinder 2-4 drives the slider 2-71. The clamping motor 2-31 drives the first pressure head 2-32 to rotate to drive the inner ring 2-6 of the joint bearing and the first rotating base plate 2-1 to rotate.

[0044] The ejector assembly includes a feed motor 2-51, an ejector 2-52, a potentiometer 2-53 and a chuck 2-54. The ejector 2-52 is installed in the chuck 2-54. One end of the ejector 2-52 is connected to the potentiometer 2-53, and the other end extends out of the chuck 2-54 and can be pressed against the outer circle of the inner ring 2-6 of the spherical bearing. When the ejector 2-52 sinks into the oil hole, the potentiometer 2-53 sends information to the PLC system. The PLC system controls the clamping motor 2-31 to stop rotating, and controls the feed motor 2-51 to drive the ejector 2-52 to push into the oil hole to poke burrs. In this embodiment, the positioning optical fiber is deflected 180°-195° relative to the ejector pin assembly. Preferably, the angle is selected to be 185°-190°. In this way, regardless of whether the oil hole is symmetrical or asymmetrical (generally the maximum offset is about 7°), it can be ensured that if the system sets a larger fixed rapid rotation angle, the positioning optical fiber will not miss the oil hole, thereby improving the accuracy of positioning and improving work efficiency.

[0045] The working process is as follows: when the inner ring 2-6 of the part reaches the first rotating bottom plate 2-1, the first downward pressure cylinder 2-4 drives the first pressure head 2-32 of the first rotating drive assembly to push against the center hole of the part, and the clamping motor 2-31 drives the part to rotate. When the positioning optical fiber is positioned at the oil hole of the part, the system automatically locates the position of the oil hole, and the clamping motor 2-31 accelerates to rotate to the angle position according to the rotation angle set by the system. At this time, the feed motor 2-51 drives the ejector pin 2-52 to push forward against the outer circle of the part, and the clamping motor 2-31 continues to drive the part to rotate slowly. When the potentiometer 2-53 detects that the ejector pin 2-52 is stuck in the oil hole position, the potentiometer 2-53 sends information to the system, and the system controls the clamping motor 2-31 to stop rotating, and the feed motor 2-51 drives the ejector pin 2-52 to move forward to remove the burrs. Then the feed motor 2-52 drives the ejector pin 2-52 to retreat, completing a burr removal.

[0046] The clamping motor 2-31 continues to rotate. During this process, the optical fiber remains in working condition. If the optical fiber senses the position of the oil hole ahead of time or behind time, the system records the position of the oil hole and completes the second burr removal in the same manner as the first burr removal. Then the first downward pressure cylinder 2-4 moves upward to drive the first rotary drive assembly upward to leave the part.

[0047] If the burr cannot be poked into place or the ejector is stuck (the oil hole is too small), the system will determine it as unqualified and alarm, and it will be handled manually. If the oil hole cannot be found or only one hole is found, the system will determine it as unqualified and remove it.

[0048] See also Figure 5 , Figure 6 and Figure 7 As shown, the cleaning and drying station 3 includes a second rotating base plate 3-1, a fixed base plate 3-2, an external spray pipe 3-3, an internal spray head 3-4, a second rotating drive assembly and a second downward pressure cylinder 3-6; the inner ring 3-7 of the joint bearing can be placed on the second rotating base plate 3-1, and a reflux hole 3-11 is provided on the second rotating base plate 3-1. The internal spray head 3-4 is driven by a dual-axis cylinder 3-8 and can extend from the bottom of the second rotating base plate 3-1 into the inner ring 3-7 of the joint bearing. The internal spray head 3-4 is provided with a spray hole 3-41, and the spray direction of the spray hole 3-41 is horizontal.

[0049] The second downward pressing cylinder 3-6 drives the second rotary drive assembly to move up and down. Specifically, the second rotary drive assembly is installed on a slider 3-91, and the slider 3-91 can be slidably connected to the guide rail 3-92. The second downward pressing cylinder 3-6 drives the slider 3-91. The upper part of the piston rod of the second downward pressing cylinder 3-6 is provided with a threaded stroke adjustment member 3-61, and the stroke adjustment member 3-61 adjusts the downward stroke of the second downward pressing cylinder 3-6; the second rotary drive assembly includes a motor 3-51, a second pressure head 3-52 and a spray hood 3-53, and the spray hood 3-53 is connected to the motor 3-51 Relatively fixed, the motor 3-51 can drive the second pressure head 3-52 to rotate, the second pressure head 3-52 can slide relative to the motor 3-51, and a spring 3-54 is provided between the second pressure head 3-52 and the motor. When the second downward pressure cylinder 3-6 drives the second rotary drive assembly downward, the second pressure head 3-52 first presses against the inner ring 3-7, and continues to drive the second rotary drive assembly downward, overcoming the elastic force of the spring 3-54 to the maximum downward pressure stroke of the second downward pressure cylinder 3-6. The spray hood 3-53 covers the fixed bottom plate 3-2, and the second pressure head 3-52 presses tightly against the inner ring 3-7. Figure 2 As shown, the bottom of the second pressure head 3-52 is set as an inverted conical rotating surface, and the inverted conical rotating surface of the second pressure head 3-52 can be pressed against the inner ring 3-7 of the spherical bearing. The second pressure head 3-52 is provided with a flow hole 3-521. When the second pressure head 3-52 is pressed against the inner ring 3-7 of the spherical bearing, the cleaning liquid can flow from the inside of the inner ring 3-7 to the outside through the flow hole 3-521. The outer spray pipe 3-3 is arranged on the fixed bottom plate 3-2. The fixed bottom plate 3-2 is annular and is located outside the second rotating bottom plate 3-1. The spray hole 3-31 of the outer spray pipe 3-3 faces the outer ball of the inner ring of the spherical bearing. Preferably, the spray hole 3-31 is a vertical strip opening. The spray cover 3-53 can cover the second rotating bottom plate 3-1 and the fixed bottom plate 3-2.

[0050] The working process is as follows: when the inner ring 3-7 reaches the second rotating base plate 3-1, the second downward pressure cylinder 3-6 drives the second rotating drive assembly downward, and the second pressure head 3-52 first contacts and presses the inner ring 3-7, and the second rotating drive assembly continues to descend to the spray cover 3-53 and covers the fixed base plate 3-2. The spring between the motor 3-51 and the second pressure head 3-52 ensures that the parts have sufficient pre-pressure; at this time, the inner spray head 3-4 rises to the specified position, and the motor 3-51 starts to drive the second pressure head 3-52, the parts and the second rotating base plate 3-1 to rotate. At this time, the outer spray pipe 3-3 and the inner spray head 3-4 start to spray the parts, and the water flow covers all surfaces of the parts to ensure that the parts are fully cleaned in multiple dimensions.

[0051] When cleaning is completed, the outer spray pipe 3-3 and the inner spray head 3-4 stop spraying water, and the motor 3-51 and the second pressure head 3-52 continue to drive the parts to rotate to spin off the cleaning liquid on the surface of the parts. After the spinning is completed, the motor 3-51 stops rotating, the inner spray head 3-4 moves downward and away, and the entire second rotary drive assembly moves upward under the drive of the second downward pressure cylinder 3-6 to complete a cleaning and spinning process.

[0052] See also Figure 8 , Fig. 9 and Fig.10 As shown, the inner diameter detection station 4 includes a working base plate 4-1, a third rotation drive assembly, an inner diameter measurement assembly and a downward pressure motor 4-4, the third rotation drive assembly includes two driving wheels 4-21, an auxiliary pressure wheel 4-22 and a tension spring 4-27, the outer walls of the two driving wheels 4-21 and the auxiliary pressure wheel 4-22 are inverted cone-shaped rotating surfaces, the tension spring 4-27 is installed between the two driving wheels 4-21 and the auxiliary pressure wheel 4-22, and three steel balls 4-11 distributed in a triangle are provided on the working base plate 4-1 to form a three-point plane parallel to the working base plate 4-1, and the inner ring of the joint bearing is placed on the three steel balls; see Fig. 9 As shown, under the tension of the tension spring 4-27, the auxiliary pressure wheel 4-22 and the two driving wheels 4-21 clamp the inner ring of the joint bearing on the working base plate 4-1; the third rotation drive assembly also includes a stepper motor 4-23, a driving gear 4-24 and two driven gears 4-25, the stepper motor 4-23 is driven and connected to the driving gear 4-24 through a belt 4-26, the driving gear 4-24 is driven and connected to the two driven gears 4-24 respectively, the two driving wheels 4-21 are respectively connected to the two driven gears 4-24, and the driving wheel 4-21 rotates to drive the inner ring to rotate on the working base plate 4-1.

[0053] The pressing motor 4-4 drives the inner diameter measuring assembly to move downward. Specifically, the pressing motor 4-4 drives the ball screw 4-41, and the ball nut 4-42 is installed on the inner diameter measuring assembly. The inner diameter measuring assembly is guided by the slider 71 and the guide rail 72. The inner diameter measuring assembly includes two measuring claws 4-31, two steel springs 4-32, an inductive pen 4-33 and a steel rod 4-35. Fig.10As shown, each steel spring 4-32 includes two left and right spring sheets 4-321 and two upper and lower sliding blocks 4-322 and 4-323. The left and right spring sheets 4-321 and the upper and lower sliding blocks 4-322 and 4-323 are cut and formed on the same steel plate. The upper and lower sliding blocks 4-322 and 4-323 are connected by the left and right spring sheets 4-321. The upper sliding block 4-322 and the lower sliding block 4-323 can slide relatively. The two measuring claws 4-31 are respectively installed on the lower sliding blocks 4-323 of the two steel springs 4-32. The inductive pen 4-33 is installed on the lower sliding block 4-323 of the steel spring 4-32 on the left. The steel rod 4-35 is correspondingly installed on the right On the sliding block 4-323 under the steel spring 4-32, a compression spring block 4-3231 and an insertion groove are provided on the sliding block 4-323. Screwing in the screw 4-34 can press against the compression spring block 4-3231, and then the compression spring block 4-3231 presses the inductive pen 4-33 or the steel rod 4-35 on the insertion groove. The two measuring claws 4-31 are respectively installed on the sliding blocks 4-323 under the two steel springs 4-32. When the two measuring claws 4-31 extend into the inner hole of the part, the two measuring claws 4-31 follow, and the sliding blocks 4-323 under the two steel springs 4-32 move relative to the upper sliding block 4-322 respectively, and the inductive pen 4-33 senses the differential value, thereby obtaining the distance between the two measuring claws 4-31.

[0054] In this embodiment, two driving wheels 4-21, an auxiliary pressure wheel 4-22, a tension spring 4-27 and the working base plate 4-1 are respectively installed on the base 4-8, a slide groove 4-81 is provided on the base 4-8, and bolts fasten the base 4-8 to the frame. The relative position of the base 4-8 and the frame can be adjusted, and the stepper motor 4-23 is synchronously adjusted with the base 4-8 to ensure that when the part is clamped, the center maximum size position of the part coincides with the maximum position of the measuring claw.

[0055] To achieve precision calibration, this embodiment further includes an auxiliary pressure wheel driving cylinder 4-5 and a calibration assembly, wherein the auxiliary pressure wheel driving cylinder 4-5 drives the auxiliary pressure wheel 4-22 to move up and down so that the auxiliary pressure wheel 4-22 can make way for the standard part mentioned later. The calibration assembly includes a standard part 4-61, a gripping mechanism 4-62 and a translation driving cylinder 4-63, wherein the translation driving cylinder 4-63 drives the gripping mechanism 4-62 to translate to move the standard part 4-61 onto the working base plate 4-1.

[0056] The inner diameter detection device of this embodiment uses two driving wheels 4-21 and an auxiliary pressure wheel 4-22 to form a triangle to position the part; when measuring, the bottom end surface of the part is used as the positioning reference surface, and the driving wheel 4-21 rotates to drive the part to rotate, and then the measuring claw 4-31 extends into the inner hole of the part for measurement; when measuring, the measuring claw 4-31 moves down and extends into the inner hole of the part, and the upper and lower sections of the part are measured respectively, and the measurement resolution can reach 0.1μm, and the measurement accuracy is ±1μm. The device realizes the online measurement of parts, eliminates the previous work content of manual online full inspection of parts, and realizes the feasibility of high-precision dimensional automatic detection.

[0057] The working process of this embodiment is described in detail below:

[0058] Positioning and measurement process:

[0059] When the manipulator clamps the part to the inspection station, the auxiliary pressure wheel 4-22, under the action of the tension spring 4-27, moves forward to press the part, pressing the part between the two driving wheels 4-21 to form a triangular positioning. At the same time, the contact surface of the auxiliary pressure wheel 4-22 and the driving wheel 4-21 has a conical surface, so that the part has an auxiliary force to press down, ensuring that the end face of the part is close to the three steel balls 4-11 on the working bottom plate 4-1. The three uniformly distributed carbide steel balls 4-11 on the working bottom plate 4-1 form a three-point plane parallel to the working bottom plate 4-1. The steel balls 4-11 lift the part by a small distance (≤1mm) to ensure point contact when the part rotates, solving the problem of the end face being disturbed by the flatness of the working bottom plate 4-1 when the part rotates, and the problem of the smoothness of the part rotation caused by dirt being brought into the end face.

[0060] When the measuring claw 4-31 is extended into the inner hole of the part under the action of the downward pressure motor 4-4, the measuring claw 4-31 and the steel spring 4-32 form a lever transmission, which converts the lateral micro-variable amount of the measuring claw into the extension and contraction amount of the inductance pen 4-33, and then converts the dimensional change into an electrical signal output, realizing the conversion of physical quantity into electrical signal.

[0061] When the part arrives at the workstation and is pressed by the auxiliary pressure wheel 4-22, the stepper motor 4-23 starts to rotate, and drives the driving wheel 4-21 to rotate through the belt 4-26 and the gear mechanism, and then the part starts to rotate around its axis, and the rotation of the part also drives the auxiliary pressure wheel 4-22 to rotate. At this time, the downward pressure motor 4-4 rotates, driving the ball screw 4-41 to rotate, thereby driving the inner diameter measuring component connected to the ball nut 4-42 to move downward along the guide rail 72 installed on the frame through the slider 71, and the measuring claw 4-31 extends into the inner hole of the part to measure the upper and lower sections of the part respectively. The change of the measuring claw 51 is converted into an electrical signal by the inductance pen 53 and output to the PLC. After the measurement is completed, the downward pressure motor 4-4 rotates in the opposite direction to drive the ball screw 4-41 to rotate, and transmits it to the inner diameter measuring component to move upward along the guide rail 72 to complete the measurement of the part. Then the stepper motor 4-23 stops rotating, and then the driving wheel 4-21 stops rotating, and then the manipulator overcomes the pulling force of the tension spring 4-27 to clamp the parts out of the inspection station and move them to the next station.

[0062] This device uses PLC to collect points. When the part rotates, the PLC records the data converted from the measuring claw to the electrical signal according to the working frequency, and performs statistical calculations at the same time. The maximum and minimum values ​​of the two cross-sections of the part are added and subtracted to obtain the ellipse, and the average size value of each cross-section of the part is calculated. The difference is the taper. In addition, the PLC makes a comprehensive judgment on the size of the part. When the maximum value, minimum value, average size value, ellipse value, and taper value of the part exceed the qualified specified range, the part is judged as NG, otherwise it is a qualified product. At the same time, the PLC automatically converts the data of the part's size calculation results into the required CPK value, XR diagram, average size data chart, etc.

[0063] Accuracy calibration process:

[0064] The auxiliary pressure wheel 4-22 moves downward and leaves the working plane under the action of the auxiliary pressure wheel driving cylinder 4-5, and the translation driving cylinder 4-63 drives the grabbing mechanism 4-62 and the standard part 4-61 to enter the working bottom plate 4-1. At this time, the auxiliary pressure wheel 4-22 rises again under the action of the auxiliary pressure wheel driving cylinder 4-5, and presses the standard part 4-61 forward under the action of the tension spring 4-27 (the standard part has the same appearance as the part). The equipment measures the single cross section of the standard part 4-61 again, just like the movement form of detecting the inner diameter of the part, and forms an electrical signal to transmit to the PLC. The PLC calculates and forms the size value of the standard part, and compares this value with the original known standard part value. If the size deviates, the PLC uses this deviation as a compensation value to compensate for the next measurement result. After the alignment is completed, the inner diameter measurement component moves upward, and the auxiliary pressure wheel 4-22 moves downward and exits the working plane. At this time, the standard part grabbing mechanism drives the standard part 4-61 to exit the working plane, and then the auxiliary pressure wheel 4-22 rises to prepare for the next measurement.

[0065] The specific structure of the manipulator 5 of this embodiment is as follows Fig.11 As shown, the manipulator 5 includes a left clamping jaw fixing plate 5-1, a right clamping jaw fixing plate 5-2, a clamping gear set, a left-right moving cylinder 5-4 and a front-back moving cylinder 5-5, the clamping gear set includes a clamping cylinder 5-31, a clamping gear 5-32 and two clamping racks 5-33, the two clamping racks 5-33 are respectively fixedly connected to the left clamping jaw fixing plate 5-1 and the right clamping jaw fixing plate 5-2, the clamping cylinder 5-31 drives the clamping gear 5-32 to rotate through the gear rack set, so that the two clamping racks 5-33 drive the left clamping jaw fixing plate 5-1 and the right clamping jaw fixing plate 5-2 to rotate simultaneously The left and right jaw fixing plates 5-1 and 5-2 move in opposite directions, and the left and right moving cylinder 5-4 drives the left jaw fixing plate 5-1 and the right jaw fixing plate 5-2 to move left and right, and the forward and backward moving cylinder 5-5 drives the left jaw fixing plate 5-1 and the right jaw fixing plate 5-2 to move forward and backward; the left jaw fixing plate 5-1 is provided with three left jaws 5-11, and the right jaw fixing plate 5-2 is provided with three right jaws 5-21, and the left jaw 5-11 and the right jaw 5-21 work together to respectively transmit the inner circles on the first rotating base plate 2-1, the second rotating base plate 3-1 and the working base plate 4-1. In this embodiment, when the parts arrive at the workstation for deburring, cleaning or inspection, the system releases a signal, and the manipulator moves forward along the forward and backward guide rail 5-51 driven by the forward and backward moving cylinder 5-5, extends into the workstation, and the clamping gear group drives the gripper to clamp the parts; then, driven by the left and right moving cylinder 5-4, it moves left one workstation along the left and right moving guide rails 5-41, and then the clamping gear group drives the gripper to release the parts; then the forward and backward moving cylinder 5-5 retracts, and the entire manipulator retreats and leaves the working position, and finally the left and right moving cylinder 5-4 retracts, driving the manipulator back to its initial position.

[0066] like Fig.12 As shown, the sorting station 6 includes a fixed plate 6-1, a lifting plate 6-2, a lifting cylinder 6-3, a second push rod 6-4 and a defective product collection box 6-5. The lifting plate 6-2 is located in the middle of the fixed plate 6-1. The lifting cylinder 6-3 drives the lifting plate 6-2 to rise and fall. The lifting plate 6-2 can rise and connect the defective product collection box 6-5. The second push rod 6-4 drives the parts on the lifting plate 6-2 to the defective product collection box 6-5. The defective product collection box 6-5 is provided with a full material switch 6-51. The sorting station 6 completes the removal and collection of defective products from the bottom to the top of the walking path, ensuring the function of the equipment to output qualified products.

[0067] In this embodiment, after the parts enter the conveyor belt 1-1, they are transported to the feed port by the conveyor belt 1-1; the feed port sensor sends the part in place signal to the detection system, and after the system obtains the signal, it notifies the push rod 1-2 to push the parts forward, so that the parts enter the oil hole deburring station 2; the system monitors the movement of the deburring mechanism in real time, records the movement state of the mechanism during the deburring process of the oil hole burrs of the parts, and indirectly determines the eligibility of the deburring by comparing the mechanism movement with the standard mechanism movement; then the robot 5 clamps the parts and moves them to the cleaning and drying station Position 3; after the parts are cleaned, they are picked up by the robot 5 and transferred to the inner diameter detection station 4; after the parts are measured, the system obtains the size, shape and position tolerances of the parts, and compares them with the standard values ​​set by the system, so as to determine the eligibility of the size, shape and position tolerances of the parts, and output the conclusion to the display screen; at the same time, the robot 5 transfers the parts to the sorting station 6; the unqualified parts are lifted by the lifting mechanism to the same plane as the unqualified product collection box, and the second pushing rod 6-4 pushes the parts into the unqualified product collection box; the qualified materials are pushed out of the detection machine by the robot 5 and fall into the collection box.

[0068] The equipment in this embodiment has a compact structure and occupies an area of ​​≤2.5m 2 , power consumption ≤5KW, production cycle ≤22S / piece; the automatic transfer of parts uses the end face of the inner ring of the spherical bearing as the positioning surface, with a simple design, which can achieve rapid changeover, and the changeover time is ≤25min. The equipment has a resolution of 0.1μm, and the size detection accuracy is ≤±1μm; the cleaning function ensures that the particle size of residual dirt on the surface of the parts is less than 5μm; the oil hole burr removal function ensures that the oil hole burrs of the parts are completely removed, and at the same time detects the size qualification of the oil hole.

[0069] The above embodiments are only used to further illustrate an intelligent inspection system for the inner ring of a spherical bearing of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An intelligent inspection system for inner rings of spherical plain bearings, characterized by: It includes: A pushing mechanism, including a conveyor belt and a pushing rod; An oil hole burring station comprises a first rotating base plate, a positioning optical fiber, a first rotating drive assembly, a first pressing assembly and an ejector assembly; the push rod pushes the inner ring on the conveyor belt onto the first rotating base plate; the positioning optical fiber sends the positioning information of the oil hole to the control system, and the control system controls the connection with the first rotating drive assembly; the first rotating drive assembly comprises a first motor and a first pressure head, the first pressing assembly drives the first rotating drive assembly downward so that the first pressure head presses against the inner ring on the first rotating base plate, and the first motor drives the first pressure head to rotate; the ejector assembly comprises a feed drive, an ejector and a potentiometer, the feed drive drives the ejector and the potentiometer to connect, one end of the ejector is mounted on the potentiometer, and the other end of the ejector can press against the outer wall of the inner ring, when the ejector sinks into the oil hole, the potentiometer sends information to the control system, the control system controls the rotating motor to stop rotating, and the feed drive drives the ejector to push into the oil hole to burr; The cleaning and drying station comprises a second rotating bottom plate, a fixed bottom plate, an outer spray pipe, an inner spray head, a second rotating drive assembly and a second pressing assembly; the inner ring can be placed on the rotating bottom plate, and the inner spray head can extend from the bottom of the second rotating bottom plate into the inner ring; the second pressing assembly drives the second rotating drive assembly to move up and down; the second rotating drive assembly comprises a second motor and a second pressure head, the second motor can drive the second pressure head to rotate, the second pressure head can abut against the inner ring, the second pressure head is provided with a flow hole, when the second pressure head abuts against the inner ring, the cleaning liquid can flow from the inside of the inner ring to the outside through the flow hole, the outer spray pipe is arranged on the fixed bottom plate, and the spray hole of the outer spray pipe faces the outer ball of the inner ring; as well as The inner diameter detection station includes a working base plate, a third rotating drive assembly, an inner diameter measuring assembly and a third pressing assembly. The third rotating drive assembly includes two driving wheels and an auxiliary wheel. The auxiliary wheel can move in the direction of the two driving wheels to clamp the inner ring on the working base plate. The rotation of the driving wheel drives the inner ring to rotate on the working base plate. The third pressing assembly drives the inner diameter measuring assembly to move downward. The inner diameter measuring assembly includes two measuring claws, two steel springs, an inductive pen and a steel rod. Each steel spring includes two left and right spring sheets and two upper and lower sliding blocks. The upper and lower sliding blocks are connected by the left and right spring sheets, the upper sliding block and the lower sliding block can slide relative to each other, the two measuring claws are respectively installed on the lower sliding blocks under the two steel springs, the inductive pen and the steel rod are respectively installed on the two lower sliding blocks, and the inductive pen measures the differential value of the distance between the two measuring claws; it also includes an auxiliary wheel driving part and a correction component, the auxiliary wheel driving part drives the auxiliary wheel to move up and down, the correction component includes a standard part, a gripping mechanism and a translation driving mechanism, the translation driving mechanism drives the gripping mechanism to translate to move the standard part to the working base plate; The first rotating bottom plate, the second rotating bottom plate and the working bottom plate are in the same conveying direction; Also includes: A manipulator, comprising a left clamp, a right clamp, a clamping driver, a left-right moving driver, and a front-back moving driver, wherein the clamping driver drives the left and right clamps to move synchronously toward or in opposite directions, the left-right moving driver drives the left and right clamps to move left and right, and the front-back moving driver drives the left and right clamps to move forward and backward; the left and right clamps cooperate to transfer the inner rings on the first rotating base plate, the second rotating base plate, and the working base plate respectively; and The sorting station includes a fixed plate, a lifting plate, a lifting drive, a pushing drive and a defective product collection box. The lifting plate is located in the middle of the fixed plate. The lifting drive drives the lifting plate to rise and fall. The lifting plate can rise and be connected to the defective product collection box. The pushing drive drives the parts on the lifting plate into the defective product collection box.

2. The intelligent spherical bearing inner ring inspection system according to claim 1 is characterized by: The first pressure head and / or the second pressure head and / or the driving wheel and / or the auxiliary wheel have an inverted conical rotating surface.

3. The intelligent spherical bearing inner ring inspection system according to claim 1 is characterized by: The positioning optical fiber is mounted on the first rotation drive assembly.

4. The intelligent spherical bearing inner ring inspection system according to claim 1 is characterized by: The positioning optical fiber is deflected 180°-195° relative to the ejector pin assembly.

5. The intelligent spherical bearing inner ring inspection system according to claim 1 is characterized by: The inner spray head is provided with a spray hole, and the spray direction of the spray hole is horizontal.

6. The intelligent spherical bearing inner ring inspection system according to claim 1 is characterized by: The working bottom plate is provided with three steel balls distributed in a triangle, and the inner ring is placed on the three steel balls.

7. The intelligent spherical bearing inner ring inspection system according to claim 1 is characterized by: The third rotation driving assembly further includes a tension spring connected between the auxiliary wheel and the two driving wheels.

8. The intelligent spherical bearing inner ring inspection system according to claim 1 is characterized by: A compression spring block and an insertion groove are arranged on the sliding block under the steel spring. The screw can be screwed in to press against the compression spring block, so that the compression spring block can compress the inductive pen or the steel rod on the insertion groove.

9. The intelligent spherical bearing inner ring inspection system according to claim 1, characterized in that: The third rotary drive assembly also includes a motor, a driving gear and two driven gears. The motor is drivingly connected to the driving gear, and the driving gear is drivingly connected to the two driven gears respectively. The two driving wheels are respectively connected to the two driven gears.

10. The intelligent spherical bearing inner ring inspection system according to claim 1, characterized in that: The first rotary drive assembly and the first pressing assembly, the second rotary drive assembly and the second pressing assembly, and / or the third rotary drive assembly and the third pressing assembly are guided by sliders and guide rails, respectively.

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