CN210089607U - Aspheric surface shape swing arm type detection device - Google Patents
Aspheric surface shape swing arm type detection device Download PDFInfo
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- CN210089607U CN210089607U CN201921072659.2U CN201921072659U CN210089607U CN 210089607 U CN210089607 U CN 210089607U CN 201921072659 U CN201921072659 U CN 201921072659U CN 210089607 U CN210089607 U CN 210089607U
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Abstract
The utility model discloses an aspheric surface shape of face swing arm formula detection device. The existing swing arm type contourgraph is difficult to adjust and operate due to multiple degrees of freedom. The utility model comprises a measuring device and a double-capacitance sensor measuring head; the double-capacitance sensor measuring head is fixed on the rotating table surface of the processing platform; the measuring device comprises a horizontal driving mechanism, a swing arm rotating platform, a measuring arm, a measuring head vertical adjusting device and a measuring head module; the measuring arm consists of a rotating swing arm and a moving swing arm; the measuring head vertical adjusting device comprises an X-axis-winding adjusting device and a Y-axis-winding adjusting device. The utility model discloses combine to use measuring device and two capacitance sensor gauge heads, when guaranteeing to detect the precision, reduced the operation technique degree of difficulty again, improved aspheric surface contact gauge head adjustment process's efficiency, reduced aspheric surface manufacturing process cost.
Description
Technical Field
The utility model relates to an optical element shape of face detects technical field, especially relates to an aspheric surface shape of face swing arm formula detection device.
Background
In recent years, optical aspheric surface parts have more and more important functions in military use and civil use due to excellent optical performance, and the demand for high-precision aspheric surface detection technology is increasing.
The swing arm type contourgraph is an effective in-place detection instrument for the optical mirror surface processing process, and is mainly characterized in that the swing arm type contourgraph is directly installed beside an optical mirror surface to be detected, a rotary table of an optical mirror surface processing machine tool to be detected is used as a working rotary table of the swing arm type contourgraph, and the mirror surface to be detected is subjected to in-place measurement. When the swing arm type contourgraph is used for detection, the swing arm type contourgraph has more degrees of freedom, the measuring head adjusting process is complex, and the requirement on technical personnel is high. Therefore, further improvement of the probe pose adjustment is required to improve the efficiency of aspheric surface processing detection and to reduce the requirement for the skill of the technician.
Disclosure of Invention
The utility model aims at providing an aspheric surface shape of face swing arm formula detection device to current swing arm formula contourgraph because multi freedom adjustment operation difficulty and to the problem that technical staff's proficiency required height.
The utility model comprises a measuring device and a double-capacitance sensor measuring head; the double-capacitance sensor measuring head is fixed on the rotating table surface of the processing platform; the measuring device comprises a horizontal driving mechanism, a swing arm rotating platform, a measuring arm, a measuring head vertical adjusting device and a measuring head module. The measuring arm consists of a rotating swing arm and a moving swing arm; the movable swing arm is fixed on an output shaft of the linear motor I and forms a sliding pair with a dovetail-shaped guide rail of the rotary swing arm; a base of the linear motor I is fixed on the rotating swing arm; the rotary swing arm and the rotary table of the swing arm rotary platform form a revolute pair; the base body of the swing arm rotating platform is driven by a horizontal driving mechanism; the balancing weight is fixed on the rotating swing arm, and the balancing weight and the moving swing arm are respectively arranged at two ends of the rotating swing arm; the central axis of the movable swing arm coincides with the central axis of the rotary swing arm and is vertical to the central axis of the rotary platform of the swing arm.
The measuring head vertical adjusting device comprises an X-axis-winding adjusting device and a Y-axis-winding adjusting device. The X-axis winding adjusting device comprises a main worm mechanism and an auxiliary worm mechanism; the main worm mechanism comprises a main worm and a main turbine ring which are meshed with each other; the auxiliary worm mechanism comprises an auxiliary worm and an auxiliary turbine ring which are meshed with each other; the main worm and the auxiliary worm are arranged in parallel and form a revolute pair with a rotary table of the swing arm rotary platform; the main worm and the auxiliary worm are respectively driven by a stepping motor I; the rotation axis of the main worm is vertical to the rotation axis of the rotating swing arm and the rotation axis of the rotary table of the swing arm rotating platform; the main turbine ring and the auxiliary turbine ring are coaxial and are fixed on the rotating swing arm at intervals; the Y-axis-winding adjusting device comprises a second stepping motor, a friction ratchet mechanism, a gear, a rack and a screw mechanism; the screw mechanism consists of a screw and a nut block; the base of the second stepping motor is fixed on the adjusting seat; the adjusting seat is fixed on the movable swing arm; the screw rod is fixed with an output shaft of the second stepping motor through a coupler and is supported on the first support through a bearing; the first support is fixed on the adjusting seat; the nut block and the screw form a screw pair, and form a sliding pair with the linear guide rail; the linear guide rail is fixed on the adjusting seat; the rack is fixed with the nut block and is meshed with the gear; the supporting shaft is supported on the second support through a bearing; the second support is fixed on the adjusting seat; the friction ratchet mechanism consists of a friction ratchet, an arc-shaped backstop and a spring piece; the friction ratchet wheel is fixed on the end face of the gear, and the gear is sleeved on the supporting shaft in an empty way; the arc-shaped backstop and the adjusting seat form a rotating pair and form a sliding friction pair with the friction ratchet; the contact surface of the arc-shaped backstop and the friction ratchet wheel is formed by connecting two curved surfaces, and the minimum curvature radius of one curved surface is equal to the maximum curvature radius of the other curved surface; one end of the spring piece is fixed with the arc-shaped backstop, and the other end of the spring piece is fixed with the adjusting seat; the arc-shaped backstop is arranged between the friction ratchet wheel and the spring piece.
The measuring head module consists of a clamp and an aspheric contact type measuring head; the clamp is fixed on the supporting shaft, and the gear of the Y-axis adjusting device is fixed on the clamp; the aspheric contact type measuring head is clamped by a clamp.
The swing arm rotating platform comprises a rotary table, a base and a rotating motor; the turntable and the base form a revolute pair and are fixed with an output shaft of the rotating motor; the base of the rotating motor is fixed on the base body; the rotating electrical machine is controlled by a controller.
The horizontal driving mechanism comprises a sliding block and a linear sliding rail; the seat body of the swing arm rotating platform is fixed with the sliding block; the sliding block and the linear sliding rail form a sliding pair and are driven by a linear motor II; the base of the linear motor II is fixed on the base of the processing platform; the linear motor II is controlled by the controller.
The first stepping motor, the second stepping motor and the first linear motor are all controlled by a controller, and the start and stop of a rotating table top of the processing platform are also controlled by the controller; the signal of the double-capacitance measuring head is transmitted to the controller.
The utility model discloses beneficial effect who has:
1. the utility model discloses combine to use measuring device and two capacitance sensor gauge heads, when guaranteeing to detect the precision, reduced the operation technique degree of difficulty again, improved aspheric surface contact gauge head adjustment process's efficiency, reduced aspheric surface manufacturing process cost.
2. The utility model discloses in adopt two worm mechanisms around X axle adjusting device, main worm mechanism and vice worm mechanism synchronous adjustment back, vice worm mechanism reverse fine setting rotates to profile backlash between the worm gear in the worm drive is eliminated to the mode of similar "clip", and makes to rotate the swing arm not take place the drunkenness in the measurement process through the self-locking of two worms. In addition, the Y-axis winding adjusting device adopts a screw mechanism and gear rack transmission mode, and utilizes the characteristic of continuous one-way non-return of a friction ratchet mechanism, the contact surface of the gear and the rack is pressed through the return stroke of the rack, so that the gear is pressed in two directions, the relative fixation of the gear is ensured in a mode similar to a clamp, the purpose of eliminating the tooth side clearance is achieved, and the non-spherical contact type measuring head is ensured not to move in the measuring process.
Drawings
Fig. 1 is a schematic structural diagram of the device of the present invention.
Fig. 2 is a schematic structural view of the X-axis adjusting device of the present invention.
Fig. 3 is a schematic structural view of the Y-axis adjusting device of the present invention.
Fig. 4 is the utility model discloses well swing arm rotary platform combines two capacitance sensor gauge heads to carry out the schematic diagram of rotation angle adjustment.
Fig. 5 is the utility model discloses well removal swing arm combines two capacitance sensor gauge heads to remove the adjustment schematic diagram.
In the figure: 1. a horizontal driving mechanism; 2. a swing arm rotating platform; 3. a balancing weight; 4. adjusting the device around the X axis; 5. rotating the swing arm; 6. a linear motor I; 7. moving the swing arm; 8. adjusting the device around the Y axis; 9. an aspheric contact probe; 10. a dual capacitance sensor probe; 11. processing a workpiece; 12. a processing platform; 13 pairs of worm mechanisms; 14. a main worm mechanism; 15. a probe module; 16. a spring plate; 17. an arcuate backstop; 18. a friction ratchet wheel; 19. a rack; 20. a screw mechanism.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical means in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.
As shown in fig. 1, the aspheric surface swing arm type detection device includes a measurement device and a dual capacitance sensor probe 10 for detecting the position of an aspheric surface detection probe 9. The double-capacitance sensor measuring head 10 adopts a capacitance displacement sensor with a model number of capaNCDT6530 of miumiridium (Beijing) testing technology Limited company; the double-capacitance sensor measuring head 10 is fixed on the rotating table surface of the processing platform 12.
The measuring device comprises a horizontal driving mechanism 1, a swing arm rotating platform 2, a measuring arm, a measuring head vertical adjusting device and a measuring head module 15. The measuring arm consists of a rotating swing arm 5 and a moving swing arm 7; the movable swing arm 7 is fixed on an output shaft of the linear motor I6 and forms a sliding pair with the dovetail-shaped guide rail of the rotary swing arm 5; and a base of the linear motor I6 is fixed on the rotating swing arm 5. The balancing weight 3 is fixed at the rotating swing arm 5, and the balancing weight 3 and the moving swing arm 7 are respectively arranged at two ends of the rotating swing arm 5.
The measuring head vertical adjusting device comprises an X-axis-winding adjusting device 4 and a Y-axis-winding adjusting device 8. As shown in fig. 2, the adjusting device 4 around the X-axis includes a main worm mechanism 14 and a sub worm mechanism 13; the main worm mechanism 14 comprises a main worm and a main turbine ring which are meshed with each other; the auxiliary worm mechanism 13 comprises an auxiliary worm and an auxiliary turbine ring which are meshed with each other; the rotary swing arm 5 and the rotary table of the swing arm rotary platform 2 form a revolute pair; the main worm and the auxiliary worm are arranged in parallel and form a revolute pair with the rotary table of the swing arm rotary platform 2; the main worm and the auxiliary worm are respectively driven by a stepping motor I; the rotation axis of the rotating swing arm 5 is vertical to the rotation axis of the main worm and the rotation axis of the rotary table of the swing arm rotating platform 2; the main turbine ring and the auxiliary turbine ring are coaxial and are fixed on the rotating swing arm 5 at intervals; the seat body of the swing arm rotary platform 2 is driven by the horizontal driving mechanism 1; in this embodiment, the swing arm rotating platform 2 includes a turntable, a base, and a rotating motor; the turntable and the base form a revolute pair and are fixed with an output shaft of the rotating motor; the base of the rotating motor is fixed on the base body; in this embodiment, the horizontal driving mechanism 1 includes a sliding block and a linear slide rail; the seat body of the swing arm rotary platform 2 is fixed with the sliding block; the sliding block and the linear sliding rail form a sliding pair and are driven by a linear motor II; and the base of the linear motor II is fixed on the base of the processing platform 12. As shown in fig. 3, the adjusting device 8 around the Y axis comprises a second stepping motor, a friction ratchet mechanism, a gear, a rack 19 and a screw mechanism 20; the screw mechanism 20 is composed of a screw and a nut block; the base of the stepping motor II is fixed on the adjusting seat; the adjusting seat is fixed on the movable swing arm 7; the screw rod is fixed with an output shaft of the second stepping motor through a coupler and is supported on the first support through a bearing; the first support is fixed on the adjusting seat; the nut block and the screw form a spiral pair, and form a sliding pair with the linear guide rail; the linear guide rail is fixed on the adjusting seat; the rack 19 is fixed with the nut block and meshed with the gear; the supporting shaft is supported on the second support through a bearing; the second support is fixed on the adjusting seat; the friction ratchet mechanism consists of a friction ratchet 18, an arc-shaped backstop 17 and a spring piece 16; the friction ratchet 18 is fixed on the end face of the gear, and the gear is sleeved on the supporting shaft in an empty way; the arc-shaped backstop 17 and the adjusting seat form a rotating pair, and form a sliding friction pair with the friction ratchet 18; the contact surface of the arc-shaped backstop 17 and the friction ratchet 18 is formed by connecting two curved surfaces, and the minimum curvature radius of one curved surface is equal to the maximum curvature radius of the other curved surface; one end of the spring piece 16 is fixed with the arc-shaped backstop 17, and the other end is fixed with the adjusting seat; an arc-shaped backstop 17 is provided between the friction ratchet 18 and the spring plate 16.
The measuring head module 15 consists of a clamp and an aspheric contact type measuring head 9; the clamp is fixed on the supporting shaft, and the gear is fixed on the clamp; the aspherical contact type probe 9 is held by a jig. The aspheric contact type measuring head 9 adopts a POM-HDH20 series direct current rebound type displacement sensor of Shenzhen science and technology Limited.
The first stepping motor, the second stepping motor, the rotary motor, the first linear motor and the second linear motor are all controlled by a controller, and the start and stop of the rotating table top of the processing platform 12 are also controlled by the controller; the signal of the dual capacitance probe 10 is transmitted to the controller.
The aspheric surface-shaped swing arm type detection device has the working principle as follows:
the method comprises the following steps: establishing a coordinate system O-XYZ, wherein an X axis is coaxial with the rotation axis of the rotating swing arm 5, and a Y axis is coaxial with the rotation axis of the supporting shaft; the coordinate system O-XYZ is a Cartesian coordinate system; roughly adjusting the position of the aspheric contact type measuring head 9, specifically: the main worm and the auxiliary worm of the X-axis adjusting device 4 are driven by two stepping motors I to synchronously rotate and respectively drive the main turbine ring and the auxiliary turbine ring, so that the rotating swing arm 5 is driven to rotate around the X axis; a second stepping motor of the Y-axis adjusting device 8 drives the nut block and the rack 19 to move through the screw rod, and further drives the gear and the friction ratchet wheel 18 to synchronously rotate around the Y axis; the aspheric contact type measuring head 9 is roughly adjusted in a vertical state by rotating around the X axis and the Y axis; then, the horizontal driving mechanism 1 drives the swing arm rotating platform 2, the measuring arm, the measuring head vertical adjusting device and the measuring head module 15 to move, the swing arm rotating platform 2 drives the measuring arm, the measuring head vertical adjusting device and the measuring head module 15 to rotate, and the linear motor drives the movable swing arm to move, so that centering and coarse adjustment of the aspheric contact type measuring head 9 and a rotating table top of the machining platform are realized.
Step two: establishing a coordinate system O1-X1Y1Z1，X1Axis and Y1The axes all being located on a horizontal plane, origin O1Is the center of the rotating table of the processing platform 12; coordinate system O1-X1Y1Z1A Cartesian coordinate system; x1The included angle between the positive direction of the axis and the positive direction of the X axis is an acute angle, Y1The included angle between the positive direction of the shaft and the positive direction of the Y shaft is an acute angle; at the initial position, the vertex of the first capacitance probe and the vertex of the second capacitance probe on the dual-capacitance probe 10 are set in the coordinate system O1-X1Y1Z1Respectively, are (x)1,y1,z1) And (x)2,y2,z2) (ii) a The aspheric contact type measuring head 9 intersects the plane z-z 1 at a point M and intersects the plane z-z 2 at a point N; the rotating table of the processing platform 12 drives the dual-capacitance probe 10 to rotate, and when the dual-capacitance probe 10 rotates to the capacitance probe I and has a measured value, the vertex and point (0,0, z) of the capacitance probe I1) Collinear with the M point, the controller records the distance d from the first capacitive probe to the aspheric contact probe1And the rotating angle α of the rotating table surface of the processing platform is obtained, the vertex coordinates of the rotated capacitive probe I are obtained according to the rotating angle α, and then the vertex-to-point (0,0, z) of the rotated capacitive probe I is obtained1) Distance d of2Then according to d1And d2Ratio λ of1Point (0,0, z)1) And after turning wellSolving X of M point by vertex coordinate of first capacitive measuring head1Coordinates and Y1Coordinates; when the double-capacitance measuring head 10 rotates to the second capacitance measuring head to measure the second capacitance measuring head, the top point and the point (0,0, z) of the second capacitance measuring head2) The distance d between the second capacitance measuring head and the non-spherical contact measuring head is recorded by the controller3And the rotating angle β of the rotating table surface of the processing platform at the moment, the vertex coordinates of the rotated second capacitive measuring head are obtained according to the rotating angle β, and then the vertex-to-point (0,0, z) of the rotated second capacitive measuring head is obtained2) Distance d of4Then according to d3And d4Ratio λ of2Point (0,0, z)2) And obtaining X of N points by the vertex coordinates of the second capacitor measuring head after rotation1Coordinates and Y1Coordinates; then, according to the M point and the N point in the coordinate system O1-X1Y1Z1The aspheric contact type measuring head 9 is obtained from the middle coordinate in the coordinate system O1-X1Y1Z1The spatial linear equation of (1); spatial straight line MN at X1O1Z1Projected straight line on surface and Z1The included angle theta of the axes is the angle of the aspheric contact type measuring head 9 adjusted around the Y axis and along the Y axis1Forward viewing angle, Z1When the axis is at the counterclockwise position of the space straight line MN, the included angle theta is positive, and Z is1When the axis is positioned in the clockwise direction of the spatial straight line MN, the included angle theta is negative; spatial straight line MN at Y1O1Z1Projected straight line on surface and Z1The included angle gamma of the axes is the angle of the aspheric contact type measuring head 9 which is adjusted around the X axis and is along the X1Negative viewing angle, Z1When the axis is at the counterclockwise position of the space straight line MN, the included angle gamma is positive, and Z is1When the axis is at the clockwise position of the spatial straight line MN, the included angle gamma is negative.
Step three: the X-axis-winding adjusting device 4 in the measuring head vertical adjusting device drives the aspheric contact type measuring head 9 to adjust an angle gamma around the X axis, and when gamma is positive, the aspheric contact type measuring head 9 rotates clockwise around the X axis along the X-axis positive visual angle; and the winding Y-axis adjusting device drives the aspheric contact type measuring head 9 to adjust an angle theta around the Y axis, and when theta is positive, the aspheric contact type measuring head 9 rotates anticlockwise around the Y axis along the positive visual angle of the Y axis, and finally the vertical fine adjustment of the aspheric contact type measuring head 9 is realized.
Step four: the horizontal driving mechanism 1 drives the swing arm rotating platform 2, the measuring arm, the measuring head vertical adjusting device and the measuring head module 15 to move, the swing arm rotating platform 2 drives the measuring arm, the measuring head vertical adjusting device and the measuring head module 15 to rotate, the linear motor drives the movable swing arm to move, and the aspheric surface contact type measuring head 9 and the rotating table top of the machining platform are centered and coarsely adjusted again.
Step five: as shown in FIG. 4, the rotation axis of the rotary table of the processing platform 12 intersects with the rotation axis of the swing arm rotary platform 2 at O3The included angle between the rotary axis of the swing arm rotary platform 2 and the rotary axis of the rotary table top of the processing platform 12 is psi, the vertical distance from the vertex of the aspheric contact type measuring head 9 to the rotary axis of the swing arm rotary platform is L under the condition that the central axis of the aspheric contact type measuring head 9 is superposed with the central axis of the rotary table top of the processing platform, the vertex of the aspheric contact type measuring head 9 is G point under the condition, and the vertical foot from the G point to the rotary axis of the swing arm rotary platform is O point4I.e. O4G is L; if the curvature radius of the spherical surface where the theoretical aspheric vertex of the machined workpiece (the point with the maximum height difference from the rotating table of the machining platform 12) is located is R, L is Rsin ψ, so that the centering and fine adjustment process of the aspheric contact probe 9 and the rotating table of the machining platform is as follows:
5.1, returning the double-capacitance measuring head 10 to the initial position; the aspheric contact type stylus 9 intersects the plane z1 at point P, which is set to be in the coordinate system O1-X1Y1Z1Has the coordinate of (x)3,y3,z3) Wherein z is3＝z1(ii) a The rotating table of the processing platform 12 drives the dual-capacitance probe 10 to rotate, and when the dual-capacitance probe 10 rotates to the capacitance probe I and has a measured value, the vertex and point (0,0, z) of the capacitance probe I1) Collinear with point P, the controller records the distance d from the capacitive probe to the aspheric contact probe5And the rotating angle of the rotating table of the processing platform at the moment
According to the angle of rotation
Obtaining the vertex coordinates of the rotated capacitive probe I, and then obtaining the vertex-to-point (0,0, z) of the rotated capacitive probe I1) Distance d of6Then according to d5And d6Ratio λ of3Point (0,0, z)1) And obtaining X of point P by the vertex coordinate of the rotated capacitive measuring head I1Coordinates and Y1Coordinates;
5.2, driving the swing arm rotary platform 2 to rotate, and enabling the swing arm rotary platform to rotate by a rotation angle omega which is arcsin (Y)PL), setting the positive direction of the rotation axis of the swing arm rotating platform and Z1The positive direction of the shaft forms an acute angle, omega is positive, the rotating platform of the swing arm rotates anticlockwise along the positive direction visual angle of the rotating axis of the rotating platform of the swing arm; wherein, YPY being P point1Coordinates; here, ω is an approximate solving formula, and ω is an exact solving formula arcsin (Y)P/L1) Wherein L is1The actual distance from the vertex of the non-spherical contact type measuring head 9 to the rotary axis of the swing arm rotary platform 2 is reduced due to L1Is not convenient to measure and is L after the fourth step1The difference from L is generally not more than 5mm, so L is used here instead of L1And using the obtained omega to perform preliminary adjustment.
5.3, returning the double-capacitance measuring head 10 to the initial position; the aspheric contact probe 9 intersects the plane z-z 1 at point Q, the set point being in the coordinate system O1-X1Y1Z1Has the coordinate of (x)4,y4,z4) Wherein z is4＝z1(ii) a The rotating table of the processing platform 12 drives the dual-capacitance probe 10 to rotate, and when the dual-capacitance probe 10 rotates to the capacitance probe I and has a measured value, the vertex and point (0,0, z) of the capacitance probe I1) Collinear with the point Q, the controller records the distance d from the capacitive probe to the aspheric contact probe7And at the moment, the rotating angle zeta of the rotating table surface of the processing platform is obtained, the vertex coordinate of the rotated capacitive measuring head I is obtained according to the rotating angle zeta, and then the vertex of the rotated capacitive measuring head I is obtainedTo point (0,0, z)1) Distance d of8Then according to d7And d8Ratio λ of4Point (0,0, z)1) And obtaining X of Q point by the vertex coordinate of the rotated capacitive measuring head I1Coordinates and Y1Coordinates; as shown in FIG. 5, the linear motor I6 drives the movable swing arm 7 to move for a distance L2＝XQsec psi when XQWhen the number is positive, the movable swing arm moves along the negative direction of the X axis; wherein, XQX being the Q point1And (4) coordinates.
5.4, repeat step 5.1, and then test
Is established, wherein XPX being point P1Coordinates, delta is a centering error tolerance value; if the result is positive, finishing the centering and fine adjustment of the aspheric contact type measuring head 9 and the rotating table surface of the processing platform, and executing the step six; otherwise, go back to step 5.2. Here, since L is obtained after each of the steps 2 and 31The difference between L and L becomes smaller, and L is adjusted gradually1L can be approximated.
Step six: clamping the workpiece 11 on the rotary table of the processing platform 12 to make the aspheric contact type measuring head 9 along Z1The shaft is translated to be in contact with a processing workpiece 11, and the vertex of the aspheric contact type measuring head 9 is set as a zero position; then, the aspherical contact probe 9 detects an aspherical surface shape of the workpiece 11.
The utility model discloses combine to use measuring device and two capacitance sensor gauge heads, when guaranteeing to detect the precision, reduced the operation technique degree of difficulty again, improved the efficiency of 9 adjustment processes of aspheric surface contact gauge head, reduced aspheric surface manufacturing process cost. The X-axis adjusting device 4 adopts a double-worm mechanism, after the main worm mechanism 14 and the auxiliary worm mechanism 13 are synchronously adjusted, the auxiliary worm mechanism 13 reversely rotates in a fine adjustment mode, outline backlash between worm gears and worm in worm transmission is eliminated in a clamp-like mode, and the rotating swing arm 5 does not move in the measuring process under the self-locking action of the double worms. In addition, the Y-axis winding adjusting device 8 adopts a screw mechanism and gear rack transmission mode, and utilizes the characteristic of continuous one-way non-return of a friction ratchet mechanism, the contact surface of the gear and the rack 19 is pressed through the return stroke of the rack 19, so that the gear is pressed in two directions, the relative fixation of the gear is ensured in a mode similar to a clamp, the purpose of eliminating the tooth side gap is achieved, and the non-spherical contact measuring head 9 is ensured not to move in the measuring process.
Claims (4)
1. The utility model provides an aspheric surface shape swing arm formula detection device, includes measuring device, its characterized in that: the double-capacitance sensor measuring head is also included; the double-capacitance sensor measuring head is fixed on the rotating table surface of the processing platform; the measuring device comprises a horizontal driving mechanism, a swing arm rotating platform, a measuring arm, a measuring head vertical adjusting device and a measuring head module; the measuring arm consists of a rotating swing arm and a moving swing arm; the movable swing arm is fixed on an output shaft of the linear motor I and forms a sliding pair with a dovetail-shaped guide rail of the rotary swing arm; a base of the linear motor I is fixed on the rotating swing arm; the rotary swing arm and the rotary table of the swing arm rotary platform form a revolute pair; the base body of the swing arm rotating platform is driven by a horizontal driving mechanism; the balancing weight is fixed on the rotating swing arm, and the balancing weight and the moving swing arm are respectively arranged at two ends of the rotating swing arm; the central axis of the movable swing arm is superposed with the central axis of the rotary swing arm and is vertical to the central axis of the swing arm rotary platform;
the measuring head vertical adjusting device comprises an X-axis-winding adjusting device and a Y-axis-winding adjusting device; the X-axis winding adjusting device comprises a main worm mechanism and an auxiliary worm mechanism; the main worm mechanism comprises a main worm and a main turbine ring which are meshed with each other; the auxiliary worm mechanism comprises an auxiliary worm and an auxiliary turbine ring which are meshed with each other; the main worm and the auxiliary worm are arranged in parallel and form a revolute pair with a rotary table of the swing arm rotary platform; the main worm and the auxiliary worm are respectively driven by a stepping motor I; the rotation axis of the main worm is vertical to the rotation axis of the rotating swing arm and the rotation axis of the rotary table of the swing arm rotating platform; the main turbine ring and the auxiliary turbine ring are coaxial and are fixed on the rotating swing arm at intervals; the Y-axis-winding adjusting device comprises a second stepping motor, a friction ratchet mechanism, a gear, a rack and a screw mechanism; the screw mechanism consists of a screw and a nut block; the base of the second stepping motor is fixed on the adjusting seat; the adjusting seat is fixed on the movable swing arm; the screw rod is fixed with an output shaft of the second stepping motor through a coupler and is supported on the first support through a bearing; the first support is fixed on the adjusting seat; the nut block and the screw form a screw pair, and form a sliding pair with the linear guide rail; the linear guide rail is fixed on the adjusting seat; the rack is fixed with the nut block and is meshed with the gear; the supporting shaft is supported on the second support through a bearing; the second support is fixed on the adjusting seat; the friction ratchet mechanism consists of a friction ratchet, an arc-shaped backstop and a spring piece; the friction ratchet wheel is fixed on the end face of the gear, and the gear is sleeved on the supporting shaft in an empty way; the arc-shaped backstop and the adjusting seat form a rotating pair and form a sliding friction pair with the friction ratchet; the contact surface of the arc-shaped backstop and the friction ratchet wheel is formed by connecting two curved surfaces, and the minimum curvature radius of one curved surface is equal to the maximum curvature radius of the other curved surface; one end of the spring piece is fixed with the arc-shaped backstop, and the other end of the spring piece is fixed with the adjusting seat; the arc-shaped backstop is arranged between the friction ratchet wheel and the spring piece;
the measuring head module consists of a clamp and an aspheric contact type measuring head; the clamp is fixed on the supporting shaft, and the gear of the Y-axis adjusting device is fixed on the clamp; the aspheric contact type measuring head is clamped by a clamp.
2. The aspheric swing arm type detecting device of claim 1, wherein: the swing arm rotating platform comprises a rotary table, a base and a rotating motor; the turntable and the base form a revolute pair and are fixed with an output shaft of the rotating motor; the base of the rotating motor is fixed on the base body; the rotating electrical machine is controlled by a controller.
3. The aspheric swing arm type detecting device of claim 1, wherein: the horizontal driving mechanism comprises a sliding block and a linear sliding rail; the seat body of the swing arm rotating platform is fixed with the sliding block; the sliding block and the linear sliding rail form a sliding pair and are driven by a linear motor II; the base of the linear motor II is fixed on the base of the processing platform; the linear motor II is controlled by the controller.
4. The device of claim 1, 2 or 3, wherein: the first stepping motor, the second stepping motor and the first linear motor are all controlled by a controller, and the start and stop of a rotating table top of the processing platform are also controlled by the controller; the signal of the double-capacitance measuring head is transmitted to the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921072659.2U CN210089607U (en) | 2019-07-10 | 2019-07-10 | Aspheric surface shape swing arm type detection device |
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| CN201921072659.2U CN210089607U (en) | 2019-07-10 | 2019-07-10 | Aspheric surface shape swing arm type detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345859A (en) * | 2019-07-10 | 2019-10-18 | 杭州电子科技大学 | Realize the self-adjusting aspheric surface swing arm detection device of gauge head pose and method |
| CN111397503A (en) * | 2020-04-09 | 2020-07-10 | 西安米拓检测技术有限公司 | Wide-range roughness contourgraph |
-
2019
- 2019-07-10 CN CN201921072659.2U patent/CN210089607U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345859A (en) * | 2019-07-10 | 2019-10-18 | 杭州电子科技大学 | Realize the self-adjusting aspheric surface swing arm detection device of gauge head pose and method |
| CN110345859B (en) * | 2019-07-10 | 2024-02-20 | 杭州电子科技大学 | Aspheric surface shape swinging arm type detection device and method for realizing self-adjustment of measuring head pose |
| CN111397503A (en) * | 2020-04-09 | 2020-07-10 | 西安米拓检测技术有限公司 | Wide-range roughness contourgraph |
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