Cylindrical workpiece runout runout detection device

Abstract

The utility model discloses a cylinder workpiece runout runout detection device, which comprises a workbench (1), and is characterized in that the workbench (1) is provided with a positioning rotating mechanism (2) and a detection mechanism (3) which are matched with each other, the positioning rotating mechanism (2) comprises a rotating cylinder (4) which is rotatably connected to the workbench (1), the top of the rotating cylinder (4) is connected with a three-jaw chuck (5), and the three-jaw chuck (5) is connected with the detection mechanism (3). Three fixed clamping jaws (6) are further arranged on the three-jaw chuck (5), the fixed clamping jaws (6) and movable clamping jaws (7) arranged on the three-jaw chuck (5) are evenly distributed in the circumferential direction at intervals, and meanwhile a plurality of limiting steps (8) are further arranged on the top end faces of the fixed clamping jaws (6) and the movable clamping jaws (7).

Description

Technical Field

[0001] The utility model relates to a device for detecting size parameters of a workpiece, in particular to a device for detecting the swing difference and runout of a cylindrical workpiece. Background Art

[0002] In industrial production activities, cylindrical workpieces are often needed, and before such workpieces leave the factory or are assembled, their dimensional accuracy needs to be tested, such as the height, diameter, circular runout and other parameters of the workpiece. The traditional testing method is for operators to use various testing tools for manual testing, which is time-consuming and labor-intensive, with low work efficiency. At the same time, the test results are heavily dependent on the proficiency and level of the operator, and are highly dependent on personnel.

[0003] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention

[0004] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes a device which has a simple structure, ingenious design, reasonable layout and can automatically complete the detection of parameters such as height, diameter and circular runout of a cylindrical workpiece.

[0005] The technical solution of the utility model is: a cylindrical workpiece runout detection device, comprising a workbench 1, characterized in that: the workbench 1 is provided with a positioning rotation mechanism 2 and a detection mechanism 3 that match each other,

[0006] The positioning and rotating mechanism 2 comprises a rotating cylinder 4 rotatably connected to the workbench 1, a three-jaw chuck 5 is connected to the top of the rotating cylinder 4, and three fixed jaws 6 are also arranged on the three-jaw chuck 5. The fixed jaws 6 and the movable jaws 7 on the three-jaw chuck 5 are evenly and spaced apart in the circumferential direction, and a plurality of limiting steps 8 are also arranged on the top surfaces of the fixed jaws 6 and the movable jaws 7.

[0007] The positioning and rotating mechanism 2 also includes a first support frame 9 fixedly connected to the bottom of the workbench 1, the first support frame 9 is fixedly connected to a rotary joint fixing plate 10, a pneumatic rotary joint 11 is rotatably connected to the rotary joint fixing plate 10, the top of the pneumatic rotary joint 11 is connected to the cylinder barrel portion of the driving cylinder 12, and the output shaft 13 of the driving cylinder 12 is connected to the driving shaft 15 of the three-jaw chuck 5 through a connecting shaft 14, and a passive synchronous wheel 16 is also sleeved on the rotating cylinder 4, the passive synchronous wheel 16 is connected to the active synchronous wheel through a synchronous belt 17, and the active synchronous wheel is arranged on the output end of the servo motor 18, and the servo motor 18 is fixedly arranged at the bottom of the workbench 1,

[0008] The detection mechanism 3 includes a horizontal linear module 19 fixedly supported on the workbench 1, a horizontal motion frame 20 is arranged on the working end of the horizontal linear module 19, a vertical linear module 21 is arranged on the horizontal motion frame 20, a second support frame 22 is arranged on the working end of the vertical linear module 21, and a photoelectric sensor 23 is arranged on the second support frame 22. At the same time, the detection mechanism 3 also includes a grating scale 24 distributed parallel to the horizontal linear module 19.

[0009] Three compensation detection brackets 25 fixedly connected to the workbench 1 are also provided at the outer circumference of the three-jaw chuck 5 . The three compensation detection brackets 25 are evenly distributed in the circumferential direction. At the same time, a compensation detection switch 26 is also provided on the compensation detection bracket 25 .

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] This type of cylindrical workpiece swing and runout detection device has a simple structure, ingenious design, and reasonable layout. It is designed to solve the problems existing in the traditional cylindrical workpiece detection process. It can automatically complete the detection of parameters such as the height, diameter, and swing and runout (i.e., circular runout) of the cylindrical workpiece. Compared with traditional manual operation, the work efficiency is greatly improved, and the detection accuracy can also be guaranteed. At the same time, its clamping and positioning part adopts a flexible design, which can clamp and position cylindrical workpieces of various diameters, expanding the scope of application. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field, and its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model (direction one).

[0013] Figure 2 The three-dimensional structure schematic diagram of an embodiment of the utility model is shown (direction two).

[0014] Figure 3 It is a cross-sectional view of the positioning and rotating mechanism part in the embodiment of the utility model.

[0015] Figure 4 It is a top view of the positioning and rotating mechanism part in the embodiment of the utility model.

[0016] Figure 5 It is a structural schematic diagram of the detection mechanism diagram part in the embodiment of the utility model. DETAILED DESCRIPTION

[0017] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figures 1 to 5As shown: A cylindrical workpiece runout detection device includes a workbench 1 as a basis, on which a positioning rotation mechanism 2 and a detection mechanism 3 matching each other are arranged.

[0018] The positioning and rotating mechanism 2 comprises a rotating cylinder 4 rotatably connected to the workbench 1, a three-jaw chuck 5 is connected to the top of the rotating cylinder 4, and three fixed jaws 6 are also arranged on the three-jaw chuck 5. The fixed jaws 6 and the movable jaws 7 on the three-jaw chuck 5 are evenly and spaced apart in the circumferential direction, and a plurality of limiting steps 8 are also arranged on the top surfaces of the fixed jaws 6 and the movable jaws 7.

[0019] The positioning and rotating mechanism 2 also includes a first support frame 9 fixedly connected to the bottom of the workbench 1, the first support frame 9 is fixedly connected to a rotary joint fixing plate 10, a pneumatic rotary joint 11 is rotatably connected to the rotary joint fixing plate 10, the top of the pneumatic rotary joint 11 is connected to the cylinder barrel portion of the driving cylinder 12, and the output shaft 13 of the driving cylinder 12 is connected to the driving shaft 15 of the three-jaw chuck 5 through a connecting shaft 14, and a passive synchronous wheel 16 is also sleeved on the rotating cylinder 4, the passive synchronous wheel 16 is connected to the active synchronous wheel through a synchronous belt 17, and the active synchronous wheel is arranged on the output end of the servo motor 18, and the servo motor 18 is fixedly arranged at the bottom of the workbench 1,

[0020] The detection mechanism 3 includes a horizontal linear module 19 fixedly supported on the workbench 1, a horizontal motion frame 20 is arranged on the working end of the horizontal linear module 19, a vertical linear module 21 is arranged on the horizontal motion frame 20, a second support frame 22 is arranged on the working end of the vertical linear module 21, and a photoelectric sensor 23 is arranged on the second support frame 22. At the same time, the detection mechanism 3 also includes a grating scale 24 distributed parallel to the horizontal linear module 19.

[0021] Three compensation detection brackets 25 fixedly connected to the workbench 1 are also provided at the outer circumference of the three-jaw chuck 5 . The three compensation detection brackets 25 are evenly distributed in the circumferential direction. At the same time, a compensation detection switch 26 is also provided on the compensation detection bracket 25 .

[0022] The working process of the cylindrical workpiece runout detection device of the embodiment of the utility model is as follows: first, take the cylindrical workpiece to be detected, place it on the positioning and rotating mechanism 2 and fix it, then the positioning and rotating mechanism 2 drives the workpiece to rotate at a constant speed, and while rotating, the detection mechanism 3 drives the photoelectric sensor 23 to move in space, and then detects the height, diameter and circular runout of the cylindrical workpiece;

[0023] The three fixed jaws 6 arranged on the three-jaw chuck 5 in the positioning and rotating mechanism 2 can support the workpiece from below, and the three movable jaws 7 can fix the workpiece in the clamping state. Since a plurality of limiting steps 8 are arranged on the fixed jaws 6 and the movable jaws 7, the three-jaw chuck 5 can be adapted to the clamping of workpieces of various diameters, making the application range of the device wider;

[0024] The specific working process of the positioning and rotating mechanism 2 is as follows: after the workpiece is placed on the three-jaw chuck 5, a signal is sent through the control system of the device to control the driving cylinder 12 to move, and the output shaft 13 of the driving cylinder 12 pulls the driving shaft 15 to move through the connecting shaft 14, and the three movable jaws 7 on the three-jaw chuck 5 move synchronously toward the center of the circle at the same time and clamp on the outer wall of the workpiece, and then the control system controls the servo motor 18 to work, and drives the passive synchronous wheel 16 to rotate through the synchronous belt 17, thereby driving the rotating cylinder 4 and the three-jaw chuck 5 to rotate at a uniform speed, that is, after the workpiece is clamped, it can rotate at a uniform speed driven by the rotating cylinder 4;

[0025] The specific working process of the detection mechanism 3 is as follows: the horizontal linear module 19 can drive the horizontal motion frame 20 and all the mechanisms thereon to move in the horizontal direction, and the vertical linear module 21 can drive the second support frame 22 to move in the vertical direction, that is, the photoelectric sensor 23 connected to the second support frame 22 can perform a composite movement in the X-axis (or Y-axis) direction and the Z-axis direction;

[0026] When detecting the size parameters of the workpiece, the detection mechanism 3 first drives the photoelectric sensor 23 to move horizontally to the detection position (where the workpiece can be sensed), and then the photoelectric sensor 23 moves from bottom to top. The difference in the longitudinal displacement interval of the detection value of the photoelectric sensor 23 is the height value of the workpiece. That is, when the photoelectric sensor 23 cannot detect the workpiece, it means that the height of the photoelectric sensor 23 is higher than the workpiece. The height value corresponding to the last detection of the workpiece is the height value of the workpiece.

[0027] Before detecting the diameter and circular runout of the workpiece, the three compensation detection switches 26 first detect the position deviation values ​​of the three movable jaws 7 in the clamped state. The so-called position deviation value means that theoretically, the movement distances of the three movable jaws 7 should be completely consistent, but in fact, due to various reasons such as machining and installation errors, the movement distances of the movable jaws 7 may not be consistent. In this state, there is a deviation between the axis of the workpiece and the axis of the three-jaw chuck 5. In order to ensure the accuracy of the measurement result, this deviation needs to be compensated.

[0028] After the three compensation detection switches 26 detect the position deviations of the three movable jaws 7 respectively, the deviation values ​​are transmitted to the control system, and the software preset in the control system automatically processes the data, analyzes the deviations between the axis of the workpiece and the axis of the three-jaw chuck 5 in the X-axis and Y-axis directions, and performs compensation calculations. After the compensation calculations, the axis of the workpiece and the axis of the three-jaw chuck 5 can be fitted to a collinear state;

[0029] Then the photoelectric sensor 23 stops at the first height, and the positioning rotating mechanism 2 drives the workpiece to rotate for one circle. The photoelectric sensor 23 detects the fluctuation of the reading during the rotation of the workpiece, which is the circular runout of the workpiece at that point; the photoelectric sensor 23 moves to the second height and stops, and repeats the above operation to test the circular runout of the workpiece at that point; the specific height and number of points to be measured are selected according to actual needs, and all the detection data are sent to the control system, which is processed by the preset software in the control system to finally obtain the circular runout data of the workpiece;

[0030] When it is necessary to measure the diameter of the workpiece, the photoelectric sensor 23 is also moved to the detection position. At this time, the control system can calculate the distance L between the photoelectric sensor 23 and the center of the three-jaw chuck 5, but this value is only calculated and fed back by the encoder of the servo motor 18. There is a certain error in the actual transmission to the actuator. In order to ensure the lateral movement accuracy, the grating ruler 24 is used to provide more accurate feedback of the L value; at the same time, the photoelectric sensor 23 can also detect a point on the outer circle of the workpiece, and can measure the distance L1 between the two. The radius of the workpiece is L-L1.

Claims

1. A cylindrical workpiece runout detection device, comprising a workbench (1), characterized in that: The workbench (1) is provided with a positioning and rotating mechanism (2) and a detection mechanism (3) that match each other. The positioning rotation mechanism (2) comprises a rotating cylinder (4) rotatably connected to the workbench (1), the top of the rotating cylinder (4) is connected to a three-jaw chuck (5), and the three-jaw chuck (5) is also provided with three fixed jaws (6), and the fixed jaws (6) and the movable jaws (7) provided on the three-jaw chuck (5) are evenly and spaced apart in the circumferential direction, and a plurality of limiting steps (8) are also provided on the top surfaces of the fixed jaws (6) and the movable jaws (7). The positioning rotation mechanism (2) further comprises a first support frame (9) fixedly connected to the bottom of the workbench (1), the first support frame (9) being fixedly connected to a rotary joint fixing plate (10), a pneumatic rotary joint (11) being rotatably connected to the rotary joint fixing plate (10), the top end of the pneumatic rotary joint (11) being connected to the cylinder barrel portion of a driving cylinder (12), and the output shaft (13) of the driving cylinder (12) being connected to the driving shaft (15) of the three-jaw chuck (5) via a connecting shaft (14), a passive synchronous wheel (16) being sleeved on the rotating cylinder (4), the passive synchronous wheel (16) being connected to the active synchronous wheel via a synchronous belt (17), the active synchronous wheel being arranged on the output end of a servo motor (18), and the servo motor (18) being fixedly arranged at the bottom of the workbench (1). The detection mechanism (3) comprises a horizontal linear module (19) fixedly supported on a workbench (1); a horizontal motion frame (20) is arranged on a working end of the horizontal linear module (19); a vertical linear module (21) is arranged on the horizontal motion frame (20); a second support frame (22) is arranged on the working end of the vertical linear module (21); a photoelectric sensor (23) is arranged on the second support frame (22); and the detection mechanism (3) further comprises a grating ruler (24) distributed in parallel with the horizontal linear module (19).

2. The cylindrical workpiece runout detection device according to claim 1, characterized in that: Three compensation detection brackets (25) fixedly connected to the workbench (1) are also provided at the outer circumference of the three-jaw chuck (5), and the three compensation detection brackets (25) are evenly distributed in the circumferential direction. At the same time, a compensation detection switch (26) is also provided on the compensation detection bracket (25).

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