Thin-wall disc part measuring mechanism and measuring method thereof

Abstract

The invention belongs to the technical field of thin-wall disc part measurement, and particularly relates to a thin-wall disc part measurement mechanism and a measurement method thereof. The thin-wall disc part measuring mechanism comprises a measuring part and a proofreading part, the measuring part comprises a lower measuring part, an upper measuring part and a measuring module, and the upper measuring part is further provided with a workpiece pressing driving part which provides static friction force for a workpiece to enable the workpiece to stably and coaxially rotate along with the lower measuring part when the workpiece is located at a measuring position and prevents the workpiece from being taken up when the workpiece is separated from the measuring position; the proofreading part comprises a proofreading piece placing part and a proofreading transfer part. The balance weight structure is designed, coaxiality with a lower rotary shaft system is guaranteed through conical surface design, a workpiece is separated and pressed during measurement to provide enough static friction force for stable rotation of measurement, meanwhile, it is considered that the workpiece is likely to be taken up when the workpiece is separated from the upper rotary shaft system during measurement, and an independent rotary gland is specially designed and can move relative to the balance weight structure; and the counterweight structure leaves after being integrally separated, so that the problem that the workpiece is easily taken up is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of measuring thin-walled disc parts, and in particular relates to a thin-walled disc part measuring mechanism and a measuring method thereof. Background Art

[0002] In the automated production line, an online inspection machine is required to measure the geometric parameters and position parameters of thin-walled disc workpieces, such as the inner diameter, outer diameter, thickness, height, roundness and runout. During the measurement process, the upper measuring part is required to automatically axially press the workpiece to increase the friction between the workpiece and the shaft system, while also ensuring the coaxiality of the rotating shaft system of the upper measuring part and the lower measuring part. After the measurement is completed, the workpiece must not be lifted up when the upper measuring part is disengaged. At present, there is no suitable thin-walled disc part measuring mechanism that meets the requirements. In view of this reason, a thin-walled disc part measuring mechanism is designed to solve the current problems. Summary of the invention

[0003] The present invention is proposed to solve the problems existing in the prior art and provides a thin-walled disc-type parts measuring mechanism and a measuring method thereof.

[0004] The present invention adopts the following technical solutions: A thin-walled disc-like parts measuring mechanism comprises a measuring part and a proofreading part, wherein: The measuring part includes a lower measuring part for positioning and driving the workpiece to rotate, an upper measuring part that moves back and forth between a measuring position and a standby position relative to the lower measuring part, and a measuring module for measuring geometric parameters and shape and position parameters of the workpiece. The upper measuring part is also provided with a workpiece clamping driving part that provides static friction for the workpiece when in the measuring position so that the workpiece rotates smoothly and coaxially with the lower measuring part, and prevents the workpiece from being lifted up when leaving the measuring position; The proofreading section comprises a proofreading piece placing section for placing proofreading pieces and a proofreading transfer section for transferring the proofreading pieces back and forth between the proofreading piece placing section and the lower measuring section.

[0005] In the above technical solution, a thin-walled disc-type parts measuring mechanism also includes a circulating part for placing the workpiece to be inspected, a unloading part for placing the workpiece after inspection, and a workpiece transfer part for transferring the workpiece between the circulating part, the lower measuring part, and the unloading part in sequence.

[0006] In the above technical solution, the upper measuring part is driven by the lifting part to switch back and forth between the measuring position and the standby position, and the lifting part includes: In the above technical solution, the upper measuring support plate is installed on a special measuring frame, and a servo motor and a linear guide pair are arranged on the upper measuring support plate. The output end of the servo motor is connected to a ball screw, and the ball screw is parallel to the linear guide pair; In the above technical solution, the lifting structure includes a guide rail pad, a connecting plate, and an arm seat connected in sequence. The guide rail pad is slidably connected to the linear guide pair and fixedly connected to the nut of the ball screw. The upper measuring part is installed on the arm seat.

[0007] In the above technical solution, the measurement support plate is also provided with a nylon pressure head for supporting the upper measuring part and a detection switch for detecting the position of the upper measuring part. The nylon pressure head is installed on the upper measurement support plate through an auxiliary L plate.

[0008] In the above technical solution, the workpiece clamping driving part includes a bushing, a counterweight structure and a rotary pressure cover that can move relative to each other in pairs. The counterweight structure includes a counterweight block, a tapered portion and a rotary shaft connected in sequence. The bushing is installed on the support arm seat. The rotary shaft passes through the bushing and can move back and forth between the lowering position and the raising position relative to the bushing. The tapered portion cooperates with the conical surface of the bushing. The rotary pressure cover is mounted on the rotary shaft and there is a lifting gap between the two.

[0009] In the above technical solution, the measuring module includes an upper measuring module arranged on the upper measuring part and a lower measuring module arranged on the lower measuring part.

[0010] In the above technical solution, the upper measuring module is arranged below the support arm seat and around the rotating shaft and the rotating pressure cover. The upper measuring module includes a conversion mechanism part, a needle cylinder driving part, an upper measuring seat, a probe, a sensor and a measuring element. The measuring element includes a lower outer diameter measuring rod, a total height measuring rod, a lower inner diameter measuring rod, an upper outer diameter measuring rod and a 0.9 measuring rod.

[0011] In the above technical solution, the lower measuring part includes a workpiece positioning axis, and the lower measuring module includes an infrared temperature sensor, a measuring photoelectric switch, an axis runout detection sensor, a lower end surface measuring rod and a standard part orientation air claw part arranged around the workpiece positioning axis.

[0012] In the above technical solution, the proofreading piece placement portion includes a proofreading piece placement seat, a proofreading photoelectric switch arranged around the proofreading piece placement seat, and a proofreading piece in-place detection switch.

[0013] The second invention object of the present invention is to provide a method for measuring a thin-walled disc-like part measuring mechanism, comprising the following steps: S1. Grab the proofreading part from the proofreading part placement part through the proofreading transfer part, place the proofreading part on the workpiece positioning axis of the lower measuring part, the measuring photoelectric switch detects the presence of material, the detection mechanism automatically starts the program to measure the proofreading part, the servo motor drives the upper measuring part downward to the measuring position, the needle cylinder drives each measuring rod to the surface position of the workpiece, measures and samples, calculates and processes and displays the results of each parameter, and the proofreading parameters are used as the measurement transfer reference. After the proofreading is completed, the measuring mechanism is reset, and the proofreading transfer part grabs the proofreading part and puts it back to the proofreading part placement part; S2. The workpiece transfer unit grabs the workpiece from the turnover unit and places the workpiece on the workpiece positioning shaft of the lower measuring unit. The measuring photoelectric switch detects the presence of material, and the measuring mechanism automatically starts the program to measure the workpiece. The servo motor drives the upper measuring unit downward into the measuring position. The counterweight structure presses the workpiece to provide it with sufficient static friction for smooth rotation. The needle cylinder drives each measuring rod to the surface position of the workpiece. The lower rotary servo drives the workpiece positioning shaft to rotate, and the workpiece rotates accordingly. Measurement sampling, calculation processing, display of various parameter results and judgment, each measuring mechanism resets, and when the upper measuring unit moves upward from the measuring position, after the counterweight structure as a whole moves upward from the workpiece, the bushing moves upward with the upper measuring unit to prevent the workpiece from being lifted up. The workpiece transfer unit grabs the workpiece and puts it into the unloading unit to complete the measurement. The workpiece transfer unit grabs the workpiece from the turnover unit for the next measurement.

[0014] Combining all the above technical solutions, the advantages and positive effects of the present invention are as follows: 1. In the present invention, the measuring mechanism uses a high-precision linear sensor to ensure the reliability of measurement sampling, adopts a high-precision precision rotary shaft system to ensure the accuracy of rotation, and the servo-driven rotation ensures the stability of the rotary motion, and can complete the precise control of the whole sampling.

[0015] 2. In the present invention, the workpiece positioning end is made of wear-resistant material to ensure long-term stability and reliability, and the positioning surface is specially designed to meet the needs of automatic loading and unloading and ensure the reliability of measurement and positioning. The upper measuring part adopts servo drive and precision ball screw pair motion to ensure long-term measurement position repeatability reliability and is suitable for multiple specifications and varieties.

[0016] 3. The present invention specially designs a workpiece clamping driving part. The counterweight structure can ensure the coaxiality with the lower rotating shaft system through the conical surface design, and can also clamp the workpiece during measurement to provide sufficient static friction for smooth rotation. At the same time, considering that the workpiece is easily lifted up when detached from the upper measurement, a separate rotating pressure cover is specially designed, which can move relative to the counterweight structure and leave after the counterweight structure is detached as a whole, thereby solving the problem of easily lifting up the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, serve to explain the principles of the present disclosure; Figure 1 It is a schematic diagram of the structure of the thin-walled disk-type parts measuring mechanism in the present invention; Figure 2 It is a schematic diagram of the structure of the upper measuring part in the present invention; Figure 3 It is a schematic diagram of the structure of the upper measurement module in the present invention; Figure 4 It is a schematic diagram of the structure of the workpiece pressing driving part in the present invention; Figure 5 It is a schematic diagram of the structure of the workpiece pressing driving part in the present invention in the measuring state and the original position state; Figure 6 It is a schematic diagram of the structure of the lower measuring part in the present invention; Figure 7 It is a three-dimensional diagram of the structure of the lower measuring part in the present invention; Figure 8 It is a structural schematic diagram of the proofreading piece placement part in the present invention.

[0018] In the figure: 1-servo motor; 2-counterweight; 3-bushing; 4-rotating shaft; 5-upper measuring module; 6-rotating cover; 7-auxiliary L plate; 8-nylon pressure head; 9-guide rail pad; 10-connecting plate; 11-support arm seat; 12-ball screw; 13-linear guide pair; 14-upper measuring support plate; 15-detection switch; 16-sensor; 17-lower outer diameter measuring rod; 18-total height measuring rod; 19-lower inner diameter measuring rod; 20-rotating Mechanism; 21-needle cylinder drive; 22-upper measuring seat; 23-probe seat; 24-upper outer diameter measuring rod; 25-0.9 measuring rod; 26-infrared temperature sensor; 27-measuring photoelectric switch; 28-axis runout detection sensor; 29-workpiece positioning axis; 30-lower end surface measuring rod; 31-standard part orientation air claw; 32-proofing part placement seat; 33-proofing photoelectric switch; 34-proofing part in-place detection switch; 35-proofing part. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0020] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Example

[0021] A thin-walled disc-like parts measuring mechanism comprises a measuring part and a proofreading part, wherein: The measuring part includes a lower measuring part for positioning and driving the workpiece to rotate, an upper measuring part that moves back and forth between a measuring position and a standby position relative to the lower measuring part, and a measuring module for measuring geometric parameters and shape and position parameters of the workpiece. The upper measuring part is also provided with a workpiece clamping driving part that provides static friction for the workpiece when in the measuring position so that the workpiece rotates smoothly and coaxially with the lower measuring part, and prevents the workpiece from being lifted up when leaving the measuring position; The proofreading section comprises a proofreading piece placing section for placing proofreading pieces and a proofreading transfer section for transferring the proofreading pieces back and forth between the proofreading piece placing section and the lower measuring section.

[0022] In this embodiment, Figure 1 The thin-walled disc-like parts measuring mechanism shown in the figure mainly includes: an upper measuring part, a lower measuring part, and a proofreading part placement part. The device of the present invention is installed on a special measuring frame. The upper measuring part is driven up and down by a servo motor, and the lower measuring part is driven to rotate the workpiece. The measuring rods are driven to the measuring surface position of the workpiece by a needle cylinder, and a high-precision linear sensor is used to ensure the reliability of measurement sampling. The upper measuring part adopts servo drive and precision ball screw pair motion to ensure the long-term measurement position repeat reliability and is suitable for the flexibility of multiple specifications. Considering that the workpiece is relatively light and its own weight cannot provide the static friction required for measuring the smooth rotation of the workpiece, a special workpiece clamping drive part is designed. The conical surface design not only ensures the coaxiality with the lower rotary shaft system, but also detaches and clamps the workpiece during measurement to provide sufficient static friction for measuring smooth rotation. At the same time, considering that the workpiece is easily lifted up when it is detached from the upper measuring part, a separate bushing (also called an external positioning cone sleeve, which can move relative to the counterweight structure) is designed, and a separate rotary pressure cover (also called an anti-workpiece lifting sleeve, which has a lifting gap with the rotary shaft) is specially designed. It is the last to leave after the counterweight structure is detached as a whole, thereby solving the problem of lifting the workpiece when the upper measuring part is detached.

[0023] Furthermore, in this embodiment, it can also be considered to include a circulating part for placing the workpiece to be inspected, a unloading part for placing the workpiece after inspection, and a workpiece transfer part for transferring the workpiece among the circulating part, the lower measuring part, and the unloading part in sequence.

[0024] Furthermore, in this embodiment, it can also be considered that the upper measuring part is driven by a lifting part to switch back and forth between the measuring position and the standby position, and the lifting part includes: An upper measuring support plate 14 is mounted on a dedicated measuring frame, and a servo motor 1 and a linear guide pair 13 are arranged on the upper measuring support plate 14. A ball screw 12 is connected to the output end of the servo motor 1, and the ball screw 12 is parallel to the linear guide pair 13; The lifting structure includes a guide rail pad 9, a connecting plate 10, and an arm seat 11 connected in sequence. The guide rail pad 9 is slidably connected to the linear guide pair 13 and fixedly connected to the nut of the ball screw 12. The upper measuring part is installed on the arm seat 11, and the upper measuring part is driven by the motor to move up and down. Furthermore, in this embodiment, it can also be considered that the dedicated measuring frame and the proofreading part placement part are respectively connected and fixed to the work surface by screws, and the position is fixed to the work surface by positioning pins, the work surface and the ground are leveled by shock-absorbing feet, and the sides are fixed by M12 screws.

[0025] Furthermore, in this embodiment, it can also be considered that the measurement support plate 14 is also provided with a nylon pressure head 8 for supporting the upper measuring part and a detection switch 15 for detecting the position of the upper measuring part, and the nylon pressure head 8 is installed on the upper measurement support plate 14 through an auxiliary L plate 7.

[0026] Figure 2 As shown in the figure is a schematic diagram of the structure of the upper measuring part of the measuring device, the measuring size is completed by the upper measuring module 5, the servo motor 1, the ball screw 12, the linear guide pair 13, and the guide pad 9 complete the up and down movement of the upper measuring part, the counterweight block 2, the bushing 3, the rotary shaft 4, and the rotary pressure cover 6 realize the axial clamping of the workpiece, the auxiliary L plate 7, the nylon pressure head 8, the connecting plate 10, the support arm seat 11, and the upper measuring support plate 14 are used to support the upper measuring module, and the detection switch 15 implements the position detection of the upper measuring part.

[0027] Furthermore, it can also be considered in this embodiment that The workpiece clamping drive part includes a bushing 3, a counterweight structure and a rotary pressure cover 6 that can move relative to each other in pairs. The counterweight structure includes a counterweight block 2, a conical part and a rotary shaft 4 connected in sequence. The bushing 3 is installed on the support arm seat 11. The rotary shaft 4 passes through the bushing 3 and can move back and forth between the lowering position and the raising position relative to the bushing 3. The conical part cooperates with the conical surface of the bushing 3. The rotary pressure cover 6 is mounted on the rotary shaft 4 and there is a lifting gap between the two.

[0028] like Figure 4-5As shown, the workpiece clamping drive part includes a bushing 3, a counterweight structure and a rotary pressure cover 6 that can move relative to each other. The counterweight structure includes a counterweight block 2, a tapered portion, and a rotary shaft 4 that are connected in sequence. The bushing 3 is installed through the support arm seat 11. The bushing serves as an external positioning cone sleeve, and the counterweight block, the tapered portion and the rotary shaft serve as a heavy hammer portion. The rotary shaft 4 passes through the bushing 3 and can move back and forth between the lowering position and the raising position relative to the bushing 3. The rotary shaft is designed as a boss structure. The rotary pressure cover 6 serves as a workpiece prevention sleeve. It is a "convex" structure with a convex hole penetrating through the middle part. It is mounted on the lower part of the rotary shaft. There is a lifting gap of about 4 mm between the rotary pressure cover and the bottom end face of the rotary shaft. When the workpiece clamping drive part is in the measuring working state, the bottom of the rotary shaft and the bottom of the rotary pressure cover are both pressed on the workpiece (such as Figure 5 After the measurement is completed, the bottom of the rotary shaft will be separated from the workpiece first, and when it moves upward about 4 mm, it will rely on the end surface of the boss to drive the workpiece protection belt to move upward and separate from the workpiece (as shown in the A part of the figure). Figure 5 As shown in part B). Specifically: the workpiece clamping drive unit is connected to the support arm seat by its external positioning cone sleeve through screws, and the external positioning cone sleeve and the support arm seat are positioned and fixedly connected by screws through the outer circle stop. The workpiece clamping drive unit drives the weight and the bushing and centers them through the conical surface of the conical part. When lifting, the counterweight structure is lifted up and centered at the same time through the conical surface. When measuring descent, the rotary pressure cover contacts the upper end surface of the workpiece to clamp the workpiece (at this time, the rotary pressure cover and its bushing are detached). The rotary pressure cover contacts the workpiece in the measuring state. The above design can prevent the workpiece from being lifted up and can be detached from the rotary pressure cover. The working principle of the workpiece clamping drive unit is as follows: Figure 5 As shown in the middle A part, when the workpiece clamping drive part is in the original position, a gap of 0.1-0.15 is reserved between the rotary shaft and the outer positioning cone sleeve to ensure smooth movement between the two. The weight part is centered with the cone surface of the outer positioning cone sleeve by gravity (the coaxiality of this cone surface with the lower end rotary shaft is less than 0.05), ensuring the coaxiality with the lower rotary shaft system; Figure 5 As shown in the middle part B, when the workpiece clamping driving part is in the measuring working state, the weight part moves upward relative to the outer positioning cone sleeve and disengages from the tapered surface of the outer positioning cone sleeve, and the weight part rotates with the workpiece. When the workpiece is clamped, there is a gap of about 4mm between the anti-workpiece lifting sleeve and the weight part. In this way, after the measurement is completed, the weight part will first disengage from the workpiece during the overall upward retraction of the upper measuring part, and only when it moves upward about 4mm will it rely on the end face of the weight part to drive the anti-workpiece lifting sleeve to move upward and disengage from the workpiece, thereby preventing the workpiece from being lifted up by the weight part when it rises and retreats; at the same time, when the upper measuring part rises, the weight part engages with the tapered surface of the outer positioning cone sleeve for centering, and only when the upper measuring part moves downward into the measuring position again and contacts the workpiece surface, will the weight part disengage from the tapered surface of the outer positioning cone sleeve.

[0029] Furthermore, in the present embodiment, it can also be considered that the workpiece-preventing belt sleeve adopts a structure that is light in itself and has a small contact surface with the workpiece.

[0030] Furthermore, in this embodiment, it can also be considered that the measuring module includes an upper measuring module arranged on the upper measuring part and a lower measuring module arranged on the lower measuring part.

[0031] Furthermore, it can also be considered in the present embodiment that the upper measuring module is arranged below the support arm seat 11 and around the rotary shaft 4 and the rotary pressure cover 6, and the upper measuring module is fixedly connected to the support arm seat 11 through a connecting plate and screws, and the upper measuring module includes a conversion mechanism part 20, a needle cylinder driving part 21, an upper measuring seat 22, a probe 23, a sensor 16 and a measuring element, and the measuring element includes a lower outer diameter measuring rod 17, a total height measuring rod 18, a lower inner diameter measuring rod 19, an upper outer diameter measuring rod 24 and a 0.9 measuring rod 25, which are used to detect the changes of the upper measuring module along the axial direction of the workpiece when the workpiece is in the workpiece measurement working state, so as to ensure the accuracy and reliability of each axial measurement dimension of the workpiece.

[0032] Figure 3 The figure shows the schematic diagram of the upper measurement module structure. The sensor 16 uses a high-precision linear sensor to ensure the accuracy of the measurement. The lower outer diameter measuring rod 17, the total height measuring rod 18, the lower inner diameter measuring rod 19, the upper measuring seat 22, the outer diameter measuring rod 24 on the probe seat, and the 0.9 measuring rod 25 can realize the measurement of inner and outer diameters, total height, 0.9 height, roundness, end jump, and unevenness. The needle cylinder driving part 21 and the conversion mechanism part 20 drive each measuring rod to the workpiece measurement surface position.

[0033] Furthermore, in this embodiment, it can be considered that the lower measuring part includes a workpiece positioning shaft 29 (workpiece positioning end) and a lower rotary servo for driving its rotation, and the lower measuring module includes an infrared temperature sensor 26, a measuring photoelectric switch 27, an axis runout detection sensor 28, a lower end face measuring rod 30 and a standard part orientation air claw part 31 arranged around the workpiece positioning shaft 29. The infrared temperature sensor is used to detect the change in the workpiece temperature, the axis runout detection sensor is used to monitor the change in the end face runout during the rotation of the shaft system, to ensure the accuracy and reliability of each axial measurement dimension, and the standard part orientation air claw part can clamp inward. Figure 6-7 As shown in the figure is a schematic diagram of the structure of the lower measuring part, the photoelectric switch 27 is used to detect whether the workpiece is in place, the shaft runout detection sensor 28 and the lower end surface measuring rod realize end runout measurement, the infrared temperature sensor 26 is used to measure the workpiece temperature and realize temperature compensation of the workpiece measurement value, the workpiece positioning shaft 29 is used for workpiece positioning, the standard positioning air claw part 31 is used to position the proofreading part, the standard positioning rod, the directional standard part, and the proofreading part can be freely taken and placed after being released.

[0034] Furthermore, in this embodiment, it can also be considered that the proofreading component placement portion includes a proofreading component placement seat 32 , a proofreading photoelectric switch 33 arranged around the proofreading component placement seat 32 , and a proofreading component in-place detection switch 34 .

[0035] Figure 8 The diagram in the figure shows the structure of the proofreading piece placement part, the proofreading piece placement seat 32 is used to place the proofreading piece, the photoelectric switch 33 and the proofreading piece in place detection switch 34 are used to detect whether the proofreading piece is in place, and the proofreading piece 35 is a calibrated proofreading piece as a measurement transfer reference. Example

[0036] A method for measuring a thin-walled disc-like part measuring mechanism comprises the following steps: S1. Grab the proofreading part 35 from the proofreading part placement part through the proofreading transfer part, place the proofreading part 35 on the workpiece positioning shaft 29 of the lower measuring part, the measuring photoelectric switch 27 detects the presence of material, the detection mechanism automatically starts the program to measure the proofreading part, the servo motor 1 drives the upper measuring part downward into the measuring position, the needle cylinder drives each measuring rod to the surface position of the workpiece, measures and samples, calculates and processes and displays each parameter result, and the proofreading parameters are used as the measurement transfer reference. After the proofreading is completed, the measuring mechanism is reset, and the proofreading transfer part grabs the proofreading part 35 and puts it back to the proofreading part placement part; S2. The workpiece transfer unit grabs the workpiece from the turnover unit and places the workpiece on the workpiece positioning shaft 29 of the lower measuring unit. The measuring photoelectric switch 27 detects the presence of material, and the measuring mechanism automatically starts the program to measure the workpiece. The servo motor 1 drives the upper measuring unit downward into the measuring position. The counterweight structure presses the workpiece to provide it with sufficient static friction for smooth rotation. The needle cylinder drives each measuring rod to the surface position of the workpiece. The lower rotary servo drives the workpiece positioning shaft 29 to rotate, and the workpiece rotates accordingly. Measurement sampling, calculation processing, display of various parameter results and judgment, each measuring mechanism resets, and when the upper measuring unit moves upward from the measuring position, after the counterweight unit as a whole moves upward from the workpiece, the bushing 3 moves upward with the upper measuring unit to prevent the workpiece from being lifted up. The workpiece transfer unit grabs the workpiece and puts it into the unloading unit to complete the measurement. The workpiece transfer unit grabs the workpiece from the turnover unit for the next measurement.

[0037] The working process of the present invention is as follows: A thin-walled disc-like parts measuring mechanism is used to detect the geometric parameters and shape parameters of thin-walled disc-like parts such as inner diameter, outer diameter, thickness, roundness and runout. The measuring principle is to measure various parameters by comparison method, use calibrated proofreading parts as the basis for benchmark transfer, and configure high-precision linear sensors to measure the changes of various parameters of the measured workpiece relative to the benchmark, so as to measure the actual values ​​of various measured parameters of the measured workpiece.

[0038] The measurement process is as follows: the manipulator grabs the proofreading part from the proofreading part placement part, places the workpiece positioning axis of the lower measuring part, the photoelectric switch detects that there is material, the detection device automatically starts the program to measure the proofreading part, the servo drives the upper measuring part downward to enter the measurement position, the needle cylinder drives each measuring rod to the surface position of the workpiece, measures and samples, calculates and processes and displays the results of each parameter, and the proofread parameters are used as the measurement transfer reference. After the proofreading is completed, each measuring mechanism is reset, and the measurement result is notified to the robot. The robot grabs the proofreading part and puts it back to the proofreading part placement part. Next, the manipulator grabs the workpiece from the turntable, places it on the workpiece positioning axis of the lower measuring part, the photoelectric switch detects that there is material, the measuring mechanism automatically starts the program to measure the workpiece, the servo drives the upper measuring part downward to enter the measurement position, the needle cylinder drives each measuring rod to the surface position of the workpiece, the lower rotary servo drives the workpiece to rotate, measures and samples, calculates and processes and displays the results of each parameter and judges, each measuring part is reset, and the measurement result is notified to the robot. The robot grabs the workpiece and puts it into the unloading tray to complete the measurement. The robot grabs the workpiece from the turntable and performs the next measurement.

[0039] The above is only a preferred embodiment of the present invention. It should be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The present invention is not limited to the form disclosed herein, and should not be regarded as an exclusion of other embodiments, but can be used in various other combinations, modifications and environments. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all be within the scope of protection of the claims attached to the present invention.

Claims

1. A thin-walled disc-like parts measuring mechanism, characterized in that: include: The measuring part includes a lower measuring part for positioning and driving the workpiece to rotate, an upper measuring part that moves back and forth between a measuring position and a standby position relative to the lower measuring part, and a measuring module for measuring geometric parameters and shape and position parameters of the workpiece. The upper measuring part is also provided with a workpiece clamping driving part that provides static friction for the workpiece when in the measuring position so that the workpiece rotates smoothly and coaxially with the lower measuring part, and prevents the workpiece from being lifted up when leaving the measuring position; The proofreading section comprises a proofreading piece placing section for placing proofreading pieces and a proofreading transfer section for transferring the proofreading pieces back and forth between the proofreading piece placing section and the lower measuring section.

2. A thin-walled disc-like parts measuring mechanism according to claim 1, characterized in that: It also includes a circulating part for placing the workpiece to be inspected, a material discharge part for placing the inspected workpiece, and a workpiece transfer part for transferring the workpiece among the circulating part, the lower measuring part, and the material discharge part in sequence.

3. A thin-walled disc-like parts measuring mechanism according to claim 1, characterized in that: The upper measuring part is driven by the lifting part to switch back and forth between the measuring position and the standby position, and the lifting part includes: An upper measuring support plate (14) is mounted on a dedicated measuring frame, a servo motor (1) and a linear guide pair (13) are arranged on the upper measuring support plate (14), an output end of the servo motor (1) is connected to a ball screw (12), and the ball screw (12) is parallel to the linear guide pair (13); A lifting structure comprises a guide rail pad (9), a connecting plate (10), and an arm seat (11) which are connected in sequence; the guide rail pad (9) is slidably connected to a linear guide pair (13) and fixedly connected to a nut of a ball screw (12); and the upper measuring part is mounted on the arm seat (11).

4. A thin-walled disc-like parts measuring mechanism according to claim 3, characterized in that: The upper measurement support plate (14) is also provided with a nylon pressure head (8) for supporting the upper measurement part and a detection switch (15) for detecting the position of the upper measurement part. The nylon pressure head (8) is mounted on the upper measurement support plate (14) via an auxiliary L plate (7).

5. The thin-walled disc-like parts measuring mechanism according to claim 3, characterized in that: The workpiece clamping drive unit comprises bushings (3) capable of relative movement in pairs, a counterweight structure and a rotary pressure cover (6); the counterweight structure comprises a counterweight block (2), a conical portion and a rotary shaft (4) connected in sequence; the bushing (3) is installed through the support arm seat (11); the rotary shaft (4) passes through the bushing (3) and is capable of moving back and forth between a lowering position and an ascending position relative to the bushing (3); the conical portion cooperates with the conical surface of the bushing (3); the rotary pressure cover (6) is mounted on the rotary shaft (4) and a lifting gap exists between the two.

6. A thin-walled disc-like parts measuring mechanism according to claim 5, characterized in that: The measuring module comprises an upper measuring module arranged on the upper measuring part and a lower measuring module arranged on the lower measuring part.

7. A thin-walled disc-like parts measuring mechanism according to claim 6, characterized in that: The upper measuring module is arranged below the support arm seat (11) and around the rotary shaft (4) and the rotary pressure cover (6), and the upper measuring module comprises a conversion mechanism part (20), a needle cylinder driving part (21), an upper measuring seat (22), a probe (23), a sensor (16) and a measuring element, and the measuring element comprises a lower outer diameter measuring rod (17), a total height measuring rod (18), a lower inner diameter measuring rod (19), an upper outer diameter measuring rod (24) and a 0.9 measuring rod (25).

8. The thin-walled disc-like parts measuring mechanism according to claim 6, characterized in that: The lower measuring part comprises a workpiece positioning shaft (29), and the lower measuring module comprises an infrared temperature measuring sensor (26) arranged around the workpiece positioning shaft (29), a measuring photoelectric switch (27), an axis runout detection sensor (28), a lower end surface measuring rod (30), and a standard part orientation air claw part (31).

9. A thin-walled disc-like parts measuring mechanism according to claim 1, characterized in that: The proofreading piece placement portion comprises a proofreading piece placement seat (32), a proofreading photoelectric switch (33) arranged around the proofreading piece placement seat (32), and a proofreading piece in-place detection switch (34).

10. A method for measuring a thin-walled disc-like part measuring mechanism, characterized in that: The following steps are involved: S1, grab the proofreading part (35) from the proofreading part placement part through the proofreading transfer part, place the proofreading part (35) on the workpiece positioning shaft (29) of the lower measuring part, the measuring photoelectric switch (27) detects the presence of material, the detection mechanism automatically starts the program to measure the proofreading part, the servo motor (1) drives the upper measuring part downward into the measuring position, the needle cylinder drives each measuring rod to the surface position of the workpiece, measures and samples, calculates and processes and displays each parameter result, and the proofreading parameter is used as the measurement transfer reference. After the proofreading is completed, the measuring mechanism is reset, and the proofreading transfer part grabs the proofreading part (35) and puts it back to the proofreading part placement part; S2, the workpiece transfer unit grabs the workpiece from the turnover unit and places the workpiece on the workpiece positioning shaft (29) of the lower measuring unit. The measuring photoelectric switch (27) detects the presence of material, and the measuring mechanism automatically starts the program to measure the workpiece. The servo motor (1) drives the upper measuring unit downward into the measuring position. The counterweight structure presses the workpiece to provide it with sufficient static friction for stable rotation of the measurement. The needle cylinder drives each measuring rod to the surface position of the workpiece. The lower rotary servo drives the workpiece positioning shaft (29) to rotate, and the workpiece rotates accordingly. The measurement sampling, calculation processing and display of each parameter result and judgment are performed. Each measuring mechanism is reset. When the upper measuring unit is upwardly separated from the measuring position, after the counterweight structure is upwardly separated from the workpiece as a whole, the rotary pressure cover moves upward with the upper measuring unit to prevent the workpiece from being lifted up. The workpiece transfer unit grabs the workpiece and puts it into the unloading unit to complete the measurement. The workpiece transfer unit grabs the workpiece from the turnover unit and performs the next measurement.

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