Detection Device for Short Taper Workpieces and Its Usage Method

Abstract

The present invention discloses a detection device for short conical workpieces, which includes a support unit, a positioning unit and a measuring unit mounted on the support unit; the connecting plate of the measuring unit is slidably mounted on the guide rail; a concave stepped groove is formed on the workpiece positioning end for holding the workpiece to be measured, and a plurality of exhaust holes are evenly distributed in the stepped groove, and the negative pressure positioning end is communicated with the exhaust holes for generating negative pressure to adsorb the workpiece to be measured; the measuring assembly includes a measuring support frame and a sensor assembly mounted on the measuring support frame, and the cylinder is connected to the connecting plate of the measuring unit for driving the sensor assembly to move along the guide rail through the measuring support frame under the drive of the cylinder. The short conical workpiece is directly placed in the stepped groove at the workpiece positioning end, which satisfies the one-time clamping of the workpiece. Then, the rotary shaft system drives the workpiece to rotate, and through the measurement of the taper angle and the virtual point diameter of the workpiece during the process or after completion by the sensor, the detection of the short conical workpiece can be quickly measured, improving the detection efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of detection equipment for workpieces with special configurations, and particularly relates to a detection device for short conical workpieces and a method for using the same. Background Art

[0002] Short conical workpieces are key functional parts used by equipment to resist various impacts, and the consistency of their machining has an important impact on the stability of the equipment. The cone angle and virtual point diameter of short conical workpieces are important dimensional parameters affecting the impact resistance performance, and their design tolerances are strict, making it difficult to ensure machining consistency. Therefore, on-site batch rapid detection is required.

[0003] Currently, a coordinate measuring machine can only perform first-piece inspection, which is prone to causing batch scrapping and does not meet the need for on-site batch rapid detection.

[0004] Therefore, it is necessary to develop a special rapid automatic detection device to replace the coordinate measuring machine in order to increase the detection frequency of the cone angle and virtual point diameter of short conical workpieces and better control the machining quality of short conical workpieces. Summary of the Invention

[0005] The purpose of the present invention is to provide a detection device for short conical workpieces that is simple in structure, applicable to workpieces with burrs on the inner ring, successively clamps short conical workpieces, is simple to operate, and has high work efficiency.

[0006] The technical solution of the present invention is as follows:

[0007] A detection device for short conical workpieces includes a support unit, a positioning unit, and a measuring unit installed on the support unit;

[0008] The support unit includes a support frame, a measuring unit connection plate installed on one side of the support frame, and a first cylinder connection plate arranged on the top of the support frame. A guide rail is installed on one side of the support frame, and the measuring unit connection plate is slidably installed on the guide rail to drive the measuring unit to move along the guide rail. The measuring unit is connected to the support frame through the first cylinder connection plate;

[0009] The positioning unit includes a rotary shaft system vertically installed at the lower part of the support frame, a workpiece positioning end driven by the rotary shaft system, and a negative pressure positioning end installed on the support frame. The workpiece positioning end is arranged above the negative pressure positioning end. The output shaft of the rotary shaft system passes through the negative pressure positioning end and is connected to the bottom of the workpiece positioning end to drive the workpiece positioning end to rotate. A plurality of exhaust holes are evenly distributed in the stepped groove, and the negative pressure positioning end is communicated with the exhaust holes to generate negative pressure to adsorb the workpiece to be measured;

[0010] The measurement unit includes a cylinder mounted on the first cylinder connecting plate and a measurement assembly driven by the cylinder. The measurement assembly includes a measurement support frame and a sensor assembly mounted on the measurement support frame. The measurement support frame is connected to the measurement unit connecting plate. The lower end of the output shaft of the cylinder is connected to the measurement unit connecting plate to drive the sensor assembly to move along the guide rail through the measurement support frame under the drive of the cylinder.

[0011] In the above technical solution, the stepped groove sequentially includes a first annular groove, a second annular groove, and a third annular groove from top to bottom. The first annular groove, the second annular groove, and the third annular groove are concentrically arranged. The inner diameters of the first annular groove, the second annular groove, and the third annular groove decrease in sequence. A plurality of the exhaust holes are evenly distributed on the first annular groove. The outer diameter of the first annular groove is matched with the outer diameter of the workpiece to be measured.

[0012] In the above technical solution, the measurement support frame includes two vertically arranged second support plates and a sensor fixing plate installed in the middle and lower parts of the second support plates. The two second support plates are symmetrically arranged on the measurement unit connecting plate. The sensor fixing plate is arranged at the bottom of the two second support plates. A sensor connecting plate is installed on the sensor fixing plate. The sensor assembly is installed below the sensor fixing plate.

[0013] In the above technical solution, the sensor assembly includes a plurality of first sensors and a plurality of second sensors. The first sensors are symmetrically arranged on the left and right sides of the workpiece to be measured to detect the end face of the workpiece to be measured. The second sensors are arranged on the left and right sides of the workpiece to be measured to detect the conical surface of the workpiece to be measured.

[0014] In the above technical solution, sensor protection sleeves are sleeved outside the first sensors and the second sensors to prevent the sensors from being damaged by external forces.

[0015] In the above technical solution, a boss is formed on the lower surface of the sensor protection sleeve, and the size of the boss is matched with that of the stepped groove.

[0016] In the above technical solution, the number of the first sensors is at least two, and each first sensor is perpendicular to the conical surface of the workpiece to be measured.

[0017] In the above technical solution, the number of the second sensors is at least four, and the detection heads of each second sensor are perpendicular to the conical surface of the workpiece to be measured.

[0018] In the above technical solution, the support frame includes a horizontally arranged bottom plate, a vertically arranged support plate on the bottom plate, and a back plate installed on one side of the support plate. The guide rail is installed on the side away from the back plate.

[0019] In the above technical solution, an air negative pressure generator is installed on the bottom plate, and the air negative pressure generator is connected to the negative pressure positioning end to generate negative pressure to adsorb the workpiece to be measured placed on the workpiece positioning end.

[0020] In the above technical solution, a shafting protection sleeve is sleeved outside the rotary shafting, and the top of the shafting protection sleeve is connected to the lower surface of the bottom plate.

[0021] In the above technical solution, the measuring unit, the positioning unit are electrically connected to an external industrial control computer and a display.

[0022] Another object of the present invention is to provide a usage method based on the detection device, including the following steps:

[0023] (1) Before measurement, place a standard part on the workpiece positioning end for calibration;

[0024] (2) Place the workpiece to be measured into the stepped groove of the workpiece positioning end, the end face of the workpiece to be measured is in contact with the stepped groove, the side to be measured of the workpiece to be measured is placed facing up, start the air negative pressure generator, and suck the workpiece to be measured tightly through the negative pressure positioning end;

[0025] (3) Start the cylinder, the output shaft of the cylinder runs downward to synchronously push the measuring assembly to move until the detection head of the sensor contacts the side to be measured of the workpiece to be measured, the first sensor measures the end face data of the workpiece to be measured, and the second sensor measures the conical surface data of the workpiece to be measured;

[0026] (4) Start the rotary shafting to drive the workpiece positioning end and the workpiece to be measured placed on the workpiece positioning end to rotate. After the workpiece to be measured rotates one and a half weeks, stop rotating. The first sensor and the second sensor send the collected measurement data to the industrial control computer, and the measurement data of the diameter and cone angle of the workpiece to be measured are obtained through calculation and analysis, and the measurement of the workpiece is completed.

[0027] The advantages and positive effects of the present invention are:

[0028] 1. Short taper workpieces are directly placed in the stepped groove of the workpiece positioning end. The stepped groove positions the outer edge of the workpiece to be measured, and can avoid the burrs of the workpiece during the process, meeting the one-time clamping of the workpiece. Then the rotary shafting drives the workpiece to rotate, and the cone angle and virtual point diameter of the short taper workpiece during or after the process are quickly measured by the sensor, improving the detection efficiency.

[0029] 2. An air passage is formed between the negative pressure positioning end, the air negative pressure generator and the exhaust holes on the stepped groove, and the workpiece is sucked tightly on the workpiece positioning end under the action of negative pressure, ensuring convenient positioning of the workpiece to be measured.

[0030] 3. The detection device of the present invention has a simple structure and convenient operation, effectively reducing the labor intensity of the operator and improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. is a schematic structural diagram of the detection device for short taper workpieces of the present invention;

[0032] Figure 2 FIG. is a schematic structural diagram of the support unit in the present invention;

[0033] Figure 3 FIG. is a schematic structural diagram of the positioning unit in the present invention;

[0034] Figure 4 FIG. is a schematic structural diagram of the measuring unit in the present invention;

[0035] Figure 5 FIG. is a side view of the measuring unit in the present invention;

[0036] Figure 6 FIG. is a partial enlarged view of the workpiece positioning end in the present invention.

[0037] In the figure:

[0038] 1. Support unit 2. Positioning unit 3. Measuring unit

[0039] 4. Industrial control computer 5. Display 6. Base plate

[0040] 7. Back plate 8. First support plate 9. Guide rail

[0041] 10. Measuring unit connecting plate 11. First cylinder connecting plate 12. Shafting protection sleeve

[0042] 13. Rotating shafting 14. Negative pressure positioning end 15. Workpiece positioning end

[0043] 16. Air negative pressure generator 17. Cylinder 18. Second cylinder connecting plate

[0044] 19. Second support plate 20. Sensor connecting plate 21. Sensor fixing plate

[0045] 22. Sensor protection sleeve 23-1. First sensor 23-2. Second sensor DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The present invention will be 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, and in no way limit the protection scope of the present invention.

[0047] Embodiment 1

[0048] As Figures 1-6As shown in the figure, the detection device for short-taper workpieces of the present invention includes a support unit 1, a positioning unit 2 and a measuring unit 3 mounted on the support unit 1;

[0049] The above-mentioned support unit 1 includes a support frame, a measuring unit connecting plate 10 installed on one side of the support frame, and a first cylinder connecting plate 11 arranged on the top of the support frame. A guide rail 9 is installed on one side of the support frame. The measuring unit connecting plate 10 is slidably installed on the guide rail 9 to drive the measuring unit 3 to move along the guide rail 9. The measuring unit 3 is connected to the support frame through the first cylinder connecting plate 11;

[0050] Further, the support frame includes a horizontally arranged bottom plate 6, a first support plate 8 vertically arranged on the bottom plate 6, and a back plate 7 installed on one side of the first support plate 8. The guide rail 9 is installed on the side away from the back plate 7.

[0051] The above-mentioned positioning unit 2 includes a rotary shaft system 13 vertically installed at the lower part of the support frame, a workpiece positioning end 15 driven by the rotary shaft system 13, and a negative pressure positioning end 14 installed on the support frame. The workpiece positioning end 15 is arranged above the negative pressure positioning end 14. The output shaft of the rotary shaft system 13 passes through the negative pressure positioning end 14 and is connected to the bottom of the workpiece positioning end 15 to drive the workpiece positioning end 15 to rotate. An inner concave stepped groove is formed on the workpiece positioning end 15 for holding the workpiece to be measured. A plurality of exhaust holes are evenly distributed in the stepped groove. The negative pressure positioning end 14 is communicated with the exhaust holes to generate negative pressure to adsorb the workpiece to be measured;

[0052] Further, the stepped groove successively includes a first annular groove, a second annular groove and a third annular groove from top to bottom. The first annular groove, the second annular groove and the third annular groove are concentrically arranged. The inner diameters of the first annular groove, the second annular groove and the third annular groove decrease in sequence. A plurality of exhaust holes are evenly distributed on the first annular groove. The outer diameter of the first annular groove matches the outer diameter of the workpiece to be measured.

[0053] Further, the stepped groove is used for outer edge positioning of the workpiece to be measured, and the stepped groove can avoid burrs in the processes between processes.

[0054] Further, an air negative pressure generator 16 is installed on the bottom plate 6. The air negative pressure generator 16 is connected to the negative pressure positioning end 14 through an air pipe to generate negative pressure to adsorb the workpiece to be measured placed on the workpiece positioning end 15. When the workpiece to be measured is placed on the surface of the workpiece positioning end 15, the air negative pressure generator 16 works. At this time, since the workpiece positioning end 15 is in contact with the end face of the workpiece to be measured, air is drawn out from the exhaust holes of the stepped groove along the air passage by the air negative pressure generator 16, generating a suction force much greater than the measuring force of the sensor, ensuring that the workpiece to be measured is tightly adsorbed and not affected by the drive of the sensor, effectively ensuring the measurement requirements.

[0055] The above-mentioned measuring unit 3 includes a cylinder 17 installed on the first cylinder connecting plate 11, a measuring assembly driven by the cylinder 17. The measuring assembly includes a measuring support frame and a sensor assembly installed on the measuring support frame. The measuring support frame is connected to the measuring unit connecting plate 10. The lower end of the output shaft of the cylinder 17 is connected to the measuring unit connecting plate 10 to drive the sensor assembly to move along the guide rail 9 through the measuring support frame under the drive of the cylinder 17.

[0056] Furthermore, the measuring support frame includes two vertically arranged second support plates 19 and a sensor fixing plate 21 installed in the middle and lower parts of the second support plates 19. The two second support plates 19 are symmetrically arranged on the measuring unit connecting plate 10. The sensor fixing plate 21 is arranged at the bottom of the two second support plates 19. A sensor connecting plate 20 is installed on the sensor fixing plate 21, and the sensor assembly is installed below the sensor fixing plate 21.

[0057] Furthermore, the sensor assembly includes a sensor protection sleeve 22, two first sensors 23-1 (pen-type high-precision inductive sensors with model DGP-2N) and four second sensors 23-2 (lever-type high-precision inductive sensors with model DG-6P). The sensor protection sleeve 22 is arranged outside the two first sensors 23-1 and the four second sensors to protect the sensors from external force damage. A boss is formed on the lower surface of the sensor protection sleeve 22, and this boss is matched with the stepped groove; the diameter of the lower end of the boss is smaller than that of the upper end, and the sensor assembly is located outside the boss; the two first sensors 23-1 are symmetrically arranged on the left and right sides of the workpiece to be measured to detect the end face of the workpiece to be measured. The four second sensors 23-2 are symmetrically arranged on the left and right sides of the workpiece to be measured, and the detection head of each second sensor 23-2 is perpendicular to the conical surface of the workpiece to be measured to detect the conical surface of the workpiece to be measured; the arrangement of the first sensors 23-1 and the second sensors 23-2 can eliminate the influence of the gap between the sensor and the workpiece to be measured on the measurement by using the sum and difference relationship.

[0058] Furthermore, through holes are provided on the first cylinder connecting plate 11 for the output shaft of the cylinder 17 to pass through the through holes and be connected to the measuring support frame.

[0059] The above-mentioned measuring unit 3, positioning unit 2 are electrically connected to an external industrial control computer 4 and a display 5. The first sensors 23-1, second sensors 23-2, cylinder 17, rotary shaft system 13, air negative pressure generator 16 are electrically connected to the industrial control computer 4. The industrial control computer 4 is used for the action control and data processing of the detection device.

[0060] Furthermore, the industrial computer 4 is an Advantech industrial computer. The industrial computer 4 is connected to the display 5 to display the output signal of the industrial computer 4. The industrial computer 4 rectifies, amplifies, filters the analog measurement data signals of the workpiece to be measured collected by the first sensor 23-1 and the second sensor 23-2, and performs A / D conversion through a data acquisition card to form digital signals. Then, through the operation and analysis of the industrial computer 4, the measurement data of the diameter and taper angle of the workpiece to be measured are obtained and visually displayed through the display 5. Unqualified data is set to be highlighted in red for warning.

[0061] The designed stepped groove is used for outer edge positioning of the workpiece to be measured. The stepped hole can avoid the burrs of the workpiece during the process. And in order to ensure the rotary measurement accuracy and convenient positioning of the workpiece, an air negative pressure generator 16 is used to position the workpiece to be measured.

[0062] By using the above method of positioning and clamping the workpiece to be measured, it is possible to simultaneously detect the burr-containing workpiece during the process and the completed workpiece on the same positioning unit 2.

[0063] Embodiment 2

[0064] Based on Embodiment 1, the method of using the detection device of the present invention is as follows:

[0065] (1) Before measurement, place the standard part on the workpiece positioning end 15 for calibration;

[0066] (2) Place the workpiece to be measured into the stepped groove of the workpiece positioning end 15. The outer edge of the workpiece to be measured is placed in the stepped groove for clamping, and the measured surface of the workpiece to be measured is placed facing up. Start the air negative pressure generator 16, and suck and tighten the workpiece to be measured through the negative pressure positioning end 14;

[0067] (3) Start the cylinder 17. The output shaft of the cylinder 17 runs downward to synchronously push the measurement assembly to move until the detection head of the sensor contacts the measured surface of the workpiece to be measured. The first sensor measures the end face data of the workpiece to be measured, and the second sensor measures the conical surface data of the workpiece to be measured;

[0068] (4) Start the rotary shaft system 13 to drive the workpiece positioning end 15 and the workpiece to be measured placed on the workpiece positioning end 15 to rotate. After the workpiece to be measured rotates one and a half weeks, stop rotating. The first sensor 23-1 and the second sensor 23-2 send the collected measurement data to the industrial computer 4. Through operation and analysis, the measurement data of the diameter and taper angle of the workpiece to be measured are obtained, and the measurement of the workpiece is completed.

[0069] Embodiment 3

[0070] Based on Embodiment 1, a shaft system protection sleeve 12 is sleeved outside the rotary shaft system 13 to protect the rotary shaft system 13. The top of the shaft system protection sleeve 12 is connected to the lower surface of the bottom plate 6.

[0071] Furthermore, the interior of the sensor protection sleeve 22 is hollow for installing the wires of multiple sensors, facilitating the arrangement and connection of the circuits.

[0072] For ease of explanation, in the embodiments, spatial relative terms such as "upper", "lower", "left", "right", etc. are used to describe the relationship of one element or feature shown in the figure with respect to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" the other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly.

[0073] Moreover, relative terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0074] The above provides an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification, or equivalent replacement that can be made by those skilled in the art without creative efforts falls within the protection scope of the present invention.

Claims

1. A detection device for short-cone workpieces, characterized in that: It includes a support unit, a positioning unit and a measuring unit mounted on the support unit; The support unit includes a support frame, a measuring unit connecting plate mounted on one side of the support frame, and a first cylinder connecting plate arranged at the top of the support frame. A guide rail is installed on one side of the support frame. The measuring unit connecting plate is slidably mounted on the guide rail to drive the measuring unit to move along the guide rail. The measuring unit is connected to the support frame through the first cylinder connecting plate; The positioning unit includes a rotary shaft system vertically installed at the lower part of the support frame, a workpiece positioning end driven by the rotary shaft system, and a negative pressure positioning end installed on the support frame. The workpiece positioning end is arranged above the negative pressure positioning end. The output shaft of the rotary shaft system passes through the negative pressure positioning end and is connected to the bottom of the workpiece positioning end to drive the workpiece positioning end to rotate. A plurality of exhaust holes are evenly distributed in the stepped groove. The negative pressure positioning end is communicated with the exhaust holes to generate negative pressure to adsorb the workpiece to be measured; The measuring unit includes a cylinder installed on the first cylinder connecting plate and a measuring assembly driven by the cylinder. The measuring assembly includes a measuring support frame and a sensor assembly installed on the measuring support frame. The measuring support frame is connected to the measuring unit connecting plate. The lower end of the output shaft of the cylinder is connected to the measuring unit connecting plate to drive the sensor assembly to move along the guide rail through the measuring support frame under the drive of the cylinder; The stepped groove successively includes a first annular groove, a second annular groove and a third annular groove from top to bottom. The first annular groove, the second annular groove and the third annular groove are concentrically arranged. The inner diameters of the first annular groove, the second annular groove and the third annular groove decrease in sequence. A plurality of the exhaust holes are evenly distributed on the first annular groove. The outer diameter of the first annular groove is matched with the outer diameter of the workpiece to be measured; The measuring support frame includes two vertically arranged second support plates and a sensor fixing plate installed at the middle and lower parts of the second support plates. The two second support plates are symmetrically arranged on the measuring unit connecting plate. The sensor fixing plate is arranged at the bottom of the two second support plates. A sensor connecting plate is installed on the sensor fixing plate. The sensor assembly is installed below the sensor fixing plate; The sensor assembly includes a plurality of first sensors and a plurality of second sensors. The first sensors are symmetrically arranged on the left and right sides of the workpiece to be measured to detect the end face of the workpiece to be measured. The second sensors are arranged on the left and right sides of the workpiece to be measured to detect the conical surface of the workpiece to be measured.

2. The detection device according to claim 1, wherein: The outer sides of the first sensors and the second sensors are sleeved with sensor protection sleeves to prevent the sensors from being damaged by external forces.

3. The detection device according to claim 2, wherein: The lower surface of the sensor protection sleeve is formed with a boss, and the size of the boss is matched with that of the stepped groove.

4. The detection device according to claim 3, wherein: The number of the first sensors is at least two, and each first sensor is perpendicular to the conical surface of the workpiece to be measured.

5. The detection device according to claim 4, characterized in that: The number of the second sensors is at least four, and the detection heads of each second sensor are perpendicular to the conical surface of the workpiece to be measured.

6. The detection device according to claim 1, wherein: The support frame includes a horizontally arranged bottom plate, a support plate vertically arranged on the bottom plate, and a back plate installed on one side of the support plate. The guide rail is installed on the side far from the back plate.

7. The detection device according to claim 6, characterized in that: An air negative pressure generator is installed on the bottom plate, and the air negative pressure generator is connected to the negative pressure positioning end to generate negative pressure to adsorb the workpiece to be measured placed on the workpiece positioning end.

8. The detection device according to claim 1, characterized in that: A shafting protection sleeve is sleeved outside the rotary shafting, and the top of the shafting protection sleeve is connected to the lower surface of the bottom plate.

9. The detection device according to claim 1, characterized in that: The measuring unit and the positioning unit are electrically connected to an external industrial control computer and a display.

10. A method for using the detection device according to any one of claims 1-9, characterized in that, It includes the following steps: (1) Before measurement, place a standard part on the workpiece positioning end for calibration; (2) Place the workpiece to be measured into the stepped groove of the workpiece positioning end. The end face of the workpiece to be measured is in contact with the stepped groove. The side to be measured of the workpiece to be measured is placed facing up. Start the air negative pressure generator, and suck the workpiece to be measured tightly through the negative pressure positioning end; (3) Start the cylinder, and the output shaft of the cylinder runs downward to synchronously push the measuring assembly to move until the detection head of the sensor contacts the side to be measured of the workpiece to be measured. The first sensor measures the end face data of the workpiece to be measured, and the second sensor measures the conical surface data of the workpiece to be measured; (4) Start the rotary shafting to drive the workpiece positioning end and the workpiece to be measured placed on the workpiece positioning end to rotate. After the workpiece to be measured rotates one and a half weeks, stop rotating. The first sensor and the second sensor send the collected measurement data to the industrial control computer, and the measurement data of the diameter and cone angle of the workpiece to be measured are obtained through calculation and analysis, and the measurement of the workpiece is completed.

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