Porous position tolerance detection device and position tolerance detection method

Abstract

The invention discloses a multi-hole position tolerance detection device and a position tolerance detection method, the multi-hole position tolerance detection device comprises a bottom rack, a clamping module, a measuring module and a displacement mechanism, the clamping module is installed at the center of the top of the bottom rack, the bottom of the displacement mechanism is installed at two sides of the bottom rack, the measuring module is installed on the displacement mechanism, and the displacement mechanism is installed on the bottom rack. The measuring module comprises a fastening unit, a first offset unit, a second offset unit and a detection unit, the fastening unit is connected with the displacement mechanism, the fastening unit and the first offset unit are clamped in the length direction and can slide in the length direction, and the first offset unit and the second offset unit are clamped in the width direction and can slide in the width direction; the detection unit comprises a displacement detection piece and a position degree detection piece which are respectively used for detecting offset and workpiece hole positions. According to the invention, the offset of the detection unit is acquired through the first offset unit and the second offset unit by using the offset measurement module, so that the position degree error is determined, and the detection precision of the position degree error of multiple holes is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment measurement, and in particular to a multi-hole position tolerance detection device and a position tolerance detection method. Background Art

[0002] With the rapid development of modern manufacturing industry, the precision and quality requirements of products are increasing day by day. In the machinery industry, flange connections with multiple holes between various parts on the machine are widely used. In order to ensure the connection accuracy between various parts, the multi-hole position tolerance detection is particularly important. In the flange multi-hole position tolerance detection, it is usually necessary to detect the radial distance and angular distance of the hole separately, or to use a position gauge for detection, but the former is time-consuming and labor-intensive, and the latter cannot obtain the detection value, making it difficult to evaluate the processing. Therefore, it is necessary to design a method that can perform comprehensive detection and obtain the specific value of the position deviation at the same time, optimize the subsequent process, and provide data support for improvement. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a porous position tolerance detection device and a position tolerance detection method. The present invention adopts a shiftable measuring module for measurement. The first offset unit of the measuring module can be shifted along the Y-axis direction, and the second offset unit can be shifted along the X-axis direction. The detection unit is installed at the bottom of the second offset unit. The offset amount of the detection unit is collected by the first offset unit and the second offset unit, and then the position error is determined, thereby improving the detection accuracy of the porous position tolerance.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a multi-hole position tolerance detection device, including a bottom frame, a clamping module, a measuring module and a displacement mechanism, the clamping module is installed at the top center of the bottom frame to clamp the workpiece to be measured and drive the workpiece to be measured to rotate, the displacement mechanism is a gate-shaped structure, the bottom of the displacement mechanism is installed on the left and right sides of the bottom frame, the measuring module is installed on the displacement mechanism so that the displacement mechanism drives the measuring module to move along the X-axis, Y-axis or Z-axis direction, the measuring module is used to detect the position error of the workpiece to be measured, the measuring module includes a fastening unit, a first offset unit, a second offset unit and a detection unit, the top of the fastening unit is fastened to the displacement mechanism through an adapter, the bottom of the fastening unit is slidably clamped with the top of the first offset unit along the length direction using a dovetail groove, and the first offset unit can slide along the length direction of the fastening unit, and the bottom of the first offset unit is connected to the second offset unit. The top of the shift unit is slidably connected along the width direction by a dovetail groove, and the second offset unit can slide along the width direction of the first offset unit; the detection unit includes a displacement detection member and a position detection member, and the number of the displacement detection members is four. A displacement detection member is respectively provided on the end faces on both sides of the length direction of the fastening unit and the first offset unit, one end of the two displacement detection members is fixed on the end face of the fastening unit, and the other ends of the two displacement detection members are fixed on the end face of the first offset unit; a displacement detection member is also respectively provided on the end faces on both sides of the width direction of the second offset unit and the first offset unit, one end of the two displacement detection members is fixed on the end face of the first offset unit, and the other ends of the two displacement detection members are fixed on the end face of the second offset unit. The four displacement detection members are used to detect the relative position offset between the fastening unit, the first offset unit, and the second offset unit, and the position detection member is installed at the bottom of the second offset unit to detect the hole position of the workpiece to be measured.

[0005] Preferably, the top of the fastening unit is provided with three fixing screw holes for fastening to the adapter seat, and the bottom of the fastening unit is provided with a first dovetail boss along the length direction; the top of the first offset unit is provided with a first dovetail groove along the length direction, the first dovetail boss and the first dovetail groove are matched with each other in a dovetail shape and are slidably connected along the dovetail groove direction, and the bottom of the first offset unit is provided with a second dovetail boss along the width direction, and the second dovetail boss has the same structure as the first dovetail boss; the top of the second offset unit is provided with a second dovetail groove along the width direction, the bottom of the second offset unit is a cylindrical structure, the second dovetail groove has the same structure as the first dovetail groove, the second dovetail groove and the second dovetail boss are matched with each other in a dovetail shape and slide along the dovetail groove direction.

[0006] Preferably, the bottom frame includes a right support plate, a rear support plate, a horizontal support plate and a left support plate, the right support plate is the same size as the left support plate, the left support plate and the right support plate are respectively fastened to the left and right ends of the horizontal support plate along the length direction, the rear support plate is installed on the rear side of the horizontal support plate, the top of the rear support plate is connected to the bottom of the horizontal support plate, the left and right ends of the rear support plate along the length direction are respectively connected to the left support plate and the right support plate, and a clamping through hole is provided in the middle of the horizontal support plate to facilitate the installation of the clamping module.

[0007] Preferably, the displacement mechanism comprises an X-direction moving module, a Y-direction moving module and a Z-direction moving module, the number of the Y-direction moving modules is two, the two Y-direction moving modules are horizontally mounted on the left and right side walls of the bottom frame respectively, a vertical connecting piece is vertically mounted on each of the Y-direction moving modules, the X-direction moving module is arranged between the facing vertical connecting pieces, the two end portions of the X-direction moving module along the length direction are respectively connected to the two vertical connecting pieces, the Z-direction moving module is arranged on the X-direction moving module so that the X-direction moving module drives the Z-direction moving module to move, the X-direction moving module, the Y-direction moving module and the Z-direction moving module all comprise a supporting unit, a displacement unit and a guiding unit, the displacement unit and the guiding unit are both mounted on the supporting unit, the displacement unit is arranged in parallel with the guiding unit, and the displacement unit drives the guiding unit to move synchronously.

[0008] Preferably, the support unit comprises a support plate and a bearing seat, and the number of the bearing seats is multiple, and the multiple bearing seats are arranged at intervals along the length direction of the support plate.

[0009] Preferably, the displacement unit includes a driving part and a moving part, the driving part is connected to the moving part and drives the moving part to move, the driving part includes a driving motor and a coupling, the output shaft of the driving motor is connected to the coupling, and the side of the coupling away from the driving motor is connected to the moving part; the moving part includes a lead screw, a lead screw nut, a rolling bearing and an end cover, the two end portions of the lead screw along the length direction are respectively connected to the coupling and the rolling bearing, and the side of the rolling bearing away from the lead screw is connected to the end cover.

[0010] Preferably, the guide unit includes two linear guide rails, two guide rail sliders and a connecting piece, the two linear guide rails are arranged parallel to the lead screw, the guide rail sliders are embedded in the linear guide rails, one end of the connecting piece is connected to the guide rail slider, and the end of the connecting piece away from the guide rail slider is connected to the lead screw nut.

[0011] Preferably, the clamping module includes a worm, a worm wheel, a rolling bearing, an adapter plate, a thrust bearing seat, a thrust bearing, a three-jaw chuck, a pressure plate, a fixed shaft and a transmission shaft, the transmission shaft is a T-shaped structure, the vertical end of the transmission shaft passes downward through the bottom frame and is connected to the worm wheel key, the worm wheel is meshed with the worm, the end of the worm is connected to the driving motor through a coupling, the lateral end of the transmission shaft is fastened to the bottom flange of the three-jaw chuck, the three-jaw chuck is used to position the workpiece to be measured, the worm and worm wheel are both located on the lower side of the bottom frame, the rolling bearing is arranged at the contact position between the vertical end of the transmission shaft and the bottom frame, the thrust bearing is installed between the lateral end of the transmission shaft and the bottom frame through the thrust bearing seat, the fixed shaft is arranged at the middle part of the three-jaw chuck, fixed to the three-jaw chuck and extends vertically upward, and the pressure plate is arranged at the top of the fixed shaft to press the workpiece to be measured through a nut.

[0012] The present invention also discloses a method for detecting the position tolerance of multiple holes by using the multiple hole position tolerance detection device, comprising the following steps:

[0013] Step S1: measurement preparation, replace the position detection piece with the corresponding diameter according to the aperture of the workpiece to be measured, then return the X-axis moving module, Y-axis moving module and Z-axis moving module of the displacement mechanism to zero position, adjust the clamping module, and ensure that the entire detection device runs normally when idle;

[0014] Step S2: clamping the workpiece, and correctly positioning and clamping the workpiece to be tested on the clamping module;

[0015] Step S3: Probe alignment: The X-axis moving module, Y-axis moving module and Z-axis moving module of the displacement mechanism drive the position detection member of the measuring module to move, so that the axis of the position detection member coincides with the geometric center axis of the uniformly distributed holes of the workpiece to be measured, that is, the center axis A of the position reference circle is found. After alignment, the X-axis moving module and the Y-axis moving module are kept stationary, and the Z-axis moving module is raised to lift the position detection member away from the workpiece to be measured by a certain distance;

[0016] Step S4: aligning the first hole of the workpiece, operating the X-direction moving module to drive the position detection member of the measuring module to move, the movement amount is the radius size of the reference circle, and the theoretical correct size of the multi-hole positioning circle of the workpiece to be measured is obtained. Then, the workpiece to be measured is driven to rotate slowly through the clamping module, and the Z-direction moving module is operated to make the position detection member slide into the nearest hole of the workpiece to be measured. The clamping module is repeatedly adjusted in both positive and negative directions to minimize the offset values ​​of the first offset unit and the second offset unit, that is, when the deformation of the displacement detection member has a minimum reading value on the computer, the adjustment is completed, and the count value corresponding to the displacement detection member on the computer is reset to zero;

[0017] Step S5: prepare for measurement, operate the Z-direction moving module of the displacement mechanism to drive the position detection member to lift upward, so that a safe distance for measurement is left between the position detection member and the workpiece to be measured;

[0018] Step S6: Formal measurement, operate the clamping module to drive the workpiece to be measured to rotate the measuring angle. Assuming that the number of holes of the multi-hole position degree of the workpiece to be measured is n, the measuring angle is 360° / n. Then, operate the Z-direction moving module of the displacement mechanism to drive the position degree detection member to move downward along the Z-axis direction and slide into the hole to be measured. The first offset unit or the second offset unit or both will be offset, and the displacement detection member will be deformed. The displacement detection sensor on the displacement detection member reads the deformation and transmits it to the computer. The displacement detection sensor indication on the displacement detection member of the first offset unit is recorded as ΔY, and the displacement detection sensor indication on the displacement detection member of the second offset unit is recorded as ΔX. Then the calculation formula for the actual detection position error f of the hole is:

[0019] Step S7: Continue measuring, repeat steps S5-S6, and measure the position errors f of all n holes of the workpiece to be measured;

[0020] Step S8: Data processing, recording the position error f obtained by measuring each hole, taking the maximum value as the actual error value of the multi-hole position of the workpiece to be measured, if the value is less than or equal to the required tolerance value t of the workpiece, it is qualified, otherwise it is unqualified;

[0021] Step S9: After the detection is completed, the X-axis moving module, the Y-axis moving module and the Z-axis moving module of the displacement mechanism are manipulated to return to zero position, the workpiece is disassembled, and the measurement report is printed and submitted.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The present invention adopts a displaceable measuring module for measurement. The first offset unit of the measuring module can be offset along the Y-axis direction, and the second offset unit can be offset along the X-axis direction. The detection unit is installed at the bottom of the second offset unit. The offset of the detection unit is collected by the first offset unit and the second offset unit, and then the position error is determined, thereby improving the detection accuracy of the hole position error.

[0024] 2. The present invention drives the workpiece to rotate to measure the angle through the clamping module, and causes the displacement detection part to deform by sliding the position detection part into the hole to be measured. The position error of the hole is obtained through the sensor. After measuring one hole, the workpiece is rotated by a certain measurement angle to repeat the measurement of the next hole, which greatly improves the detection efficiency of multi-hole position errors and is particularly suitable for the multi-hole position detection needs of large-scale parts production.

[0025] 3. The present invention adopts a clamping module to clamp and rotate the workpiece to be measured. The worm gear at the bottom of the clamping module drives the transmission shaft to rotate, and the transmission shaft drives the three-jaw chuck at the top to rotate synchronously. The transmission shaft is connected to the bottom frame through a rolling bearing, which improves the rotation accuracy of the workpiece to be measured.

[0026] 4. The displacement mechanism of the present invention is a gate-shaped structure, and the measuring module is connected to the displacement mechanism, so that the displacement mechanism can drive the measuring module to move along the X-axis, Y-axis or Z-axis direction, thereby improving the detection efficiency of the measuring module.

[0027] 5. The detection device of the present invention has a simple structure, low manufacturing cost, is easy to use and maintain, and effectively reduces the detection cost.

[0028] 6. The detection device of the present invention is simple and convenient to operate, and the steps of the multi-hole position tolerance detection method are clear, and it does not require complicated operation procedures and professional skills, which reduces the difficulty of detection and is suitable for promotion.

[0029] The present invention is further described in detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the measurement module of the present invention;

[0032] Figure 3 for Figure 2 A cross-sectional view of

[0033] Figure 4 for Figure 2 Cross-sectional view after rotation at a certain angle;

[0034] Figure 5 It is a structural schematic diagram of the bottom frame of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the X-direction moving module of the present invention;

[0036] Figure 7 for Figure 6 A schematic diagram of a top view structure;

[0037] Figure 8 It is a structural schematic diagram of the Z-direction moving module of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of the Y-direction moving module of the present invention;

[0039] Fig.10 It is a schematic diagram of the internal structure of the vertical connecting member of the present invention;

[0040] Fig.11 It is a structural schematic diagram of the clamping module of the present invention;

[0041] Fig.12 Schematic diagram of the detection method of the present invention.

[0042] Description of reference numerals:

[0043] 1—bottom frame; 1-1—right support plate; 1-2—L-shaped support plate;

[0044] 1-3—first motor connecting plate; 1-4—first bearing seat;

[0045] 1-5—second bearing seat; 1-6—rear support plate; 1-7—horizontal support plate;

[0046] 1-8—left support plate; 1-9—clamping through hole;

[0047] 2—Y-axis moving module; 2-1—Y-axis driving motor; 2-2—first coupling;

[0048] 2-3—first lead screw nut; 2-4—Y-direction slider; 2-5—first guide rail slider;

[0049] 2-6—Y-axis lead screw; 2-7—first guide rail; 2-8—vertical support plate;

[0050] 2-9—shield; 2-10—first rolling bearing; 2-11—bearing end cover;

[0051] 2-12—X-axis driving motor; 2-13—belt; 2-14—belt gear;

[0052] 2-15—gasket; 3—clamping module; 3-1—worm;

[0053] 3-2—worm gear; 3-3—rolling bearing; 3-4—adapter plate;

[0054] 3-5—thrust bearing seat; 3-6—thrust bearing; 3-7—three-jaw chuck;

[0055] 3-8—pressure plate; 3-9—fixed shaft; 3-10—transmission shaft;

[0056] 4—X-axis moving module; 4-1—Z-axis connecting plate; 4-2—second guide rail;

[0057] 4-3—first support plate; 4-4—second support plate; 4-5—end cover;

[0058] 4-6—third bearing seat; 4-7—X-axis lead screw; 4-8—second guide rail slider;

[0059] 4-9—connecting slider; 4-10—second lead screw nut; 5—Z-axis moving module;

[0060] 5-1—Z-axis frame; 5-2—Z-axis rolling bearing; 5-3—third end cover;

[0061] 5-4—the third guide rail; 5-5—the Z-direction lead screw nut; 5-6—the Z-direction lead screw;

[0062] 5-7—the third coupling; 5-8—the Z-axis motor; 5-9—the anti-collision washer;

[0063] 5-10—screw nut connecting block; 5-11—third guide rail slider;

[0064] 6—measurement module; 6-1—fastening unit; 6-2—first offset unit;

[0065] 6-3—second offset unit; 6-4—displacement detection member;

[0066] 6-5—position detection part; 6-6—first dovetail boss; 6-7—magnet;

[0067] 6-8—first dovetail groove; 6-9—second dovetail boss; 6-10—second dovetail groove;

[0068] 7 - vertical connecting piece; 8 - workpiece to be measured; 9 - adapter. DETAILED DESCRIPTION

[0069] like Figure 1 , Figure 2As shown, the present invention includes a bottom frame 1, a clamping module 3, a measuring module 6 and a displacement mechanism. The clamping module 3 is installed at the top center of the bottom frame 1 to clamp the workpiece 8 to be measured and drive the workpiece 8 to be measured to rotate. The displacement mechanism is a gate-shaped structure. The bottom of the displacement mechanism is installed on the left and right sides of the bottom frame 1. The measuring module 6 is installed on the displacement mechanism so that the displacement mechanism drives the measuring module 6 to move along the X-axis, Y-axis or Z-axis direction. The measuring module 6 is used to detect the position error of the workpiece 8 to be measured. The measuring module 6 includes a fastening unit 6-1, a first offset unit 6-2, a second offset unit 6-3 and a detection unit. The top of the fastening unit 6-1 is fastened to the displacement mechanism through an adapter 9. The bottom of the fastening unit 6-1 is slidably connected to the top of the first offset unit 6-2 along the length direction using a dovetail groove, and the first offset unit 6-2 can slide along the length direction of the fastening unit 6-1. The bottom of the first offset unit 6-2 is slidably connected to the top of the second offset unit 6-3 along the width direction using a dovetail groove, and the second offset unit 6-3 can slide along the first offset unit 6-3. The shift unit 6-2 slides in the width direction; the detection unit includes a displacement detection member 6-4 and a position detection member 6-5, the number of the displacement detection members 6-4 is four, and a displacement detection member 6-4 is respectively provided on both side end faces in the length direction of the fastening unit 6-1 and the first offset unit 6-2, one end of the two displacement detection members 6-4 are fixed on the end face of the fastening unit 6-1, and the other ends of the two displacement detection members 6-4 are fixed on the end face of the first offset unit 6-2; the second offset unit 6-3 and the first offset unit 6-2 are also respectively provided with a displacement detection member 6-4 on both side end faces in the width direction, one end of the two displacement detection members 6-4 are fixed on the end face of the first offset unit 6-2, and the other ends of the two displacement detection members 6-4 are fixed on the end face of the second offset unit 6-3, the four displacement detection members 6-4 are used to detect the relative position offset between the fastening unit 6-1, the first offset unit 6-2 and the second offset unit 6-3, and the position detection member 6-5 is installed at the bottom of the second offset unit 6-3 to detect the hole position of the workpiece 8 to be measured.

[0070] The multi-hole position tolerance detection device of the present application is mainly used to detect the position errors of multiple holes on the end faces of flange parts. The bottom frame 1 supports the clamping module 3 and the displacement mechanism upward, and the workpiece 8 to be measured is placed on the top of the clamping module 3. The clamping module 3 is controlled to clamp the workpiece 8 to be measured and make the central axis of the workpiece 8 to be measured coincide with the central axis of the clamping module 3. The position of the measuring module 6 is adjusted by the displacement mechanism. Based on the position of the workpiece 8 to be measured, the displacement mechanism drives the measuring module 6 to move along the X-axis direction and the Y-axis direction to move the measuring module 6 to the target position, which is a preset standard position. Then the displacement mechanism drives the measuring module 6 to move vertically downward along the Z direction to measure the position of the hole position of the workpiece 8 to be measured.

[0071] The adapter seat 9 is an L-shaped structure. The side of the vertical end of the adapter seat 9 away from the lateral end is connected to the displacement mechanism. The lateral end of the adapter seat 9 is fastened to the fastening unit 6-1 to facilitate the displacement mechanism to drive the fastening unit 6-1 to move synchronously. The first offset unit 6-2 is slidably connected to the bottom of the fastening unit 6-1 to facilitate the fastening unit 6-1 to drive the first offset unit 6-2 to move synchronously. The second offset unit 6-3 is slidably connected to the bottom of the first offset unit 6-2 to facilitate the first offset unit 6-2 to drive the second offset unit 6-3 to move synchronously, that is, the position detection member 6-5 at the bottom of the second offset unit 6-3 is driven to move synchronously through the displacement mechanism; the first offset unit 6-2 can slide along the length direction of the fastening unit 6-1 and the first offset unit 6-2, and the second offset unit 6 -3 can slide along the width direction of the first offset unit 6-2 and the second offset unit 6-3, so that the position detection component 6-5 can be successfully inserted into the hole to be measured when measuring the hole position of the workpiece 8 to be measured. The displacement mechanism drives the position detection component 6-5 to move to the target position for hole position detection. If the position detection component 6-5 touches the edge of the hole to be measured first, the position detection component 6-5 is offset along the length direction of the first offset unit 6-2 or the width direction of the first offset unit 6-2, so that the position detection component 6-5 is successfully inserted into the hole to be measured of the workpiece 8 to be measured. Then, the four displacement detection components 6-4 respectively detect the offset amount of the first offset unit 6-2 along the length direction or the second offset unit 6-3 along the width direction, and the position error of the hole to be measured can be determined by calculation.

[0072] like Figures 2 to 4 As shown, the top of the fastening unit 6-1 is provided with three fixing screw holes for fastening with the adapter 9, and the bottom of the fastening unit 6-1 is provided with a first dovetail boss 6-6 along the length direction; the top of the first offset unit 6-2 is provided with a first dovetail groove 6-8 along the length direction, the first dovetail boss 6-6 and the first dovetail groove 6-8 are matched with each other in a dovetail shape and are slidably connected along the dovetail groove direction, and the bottom of the first offset unit 6-2 is provided with a second dovetail boss 6-9 along the width direction, and the second dovetail boss 6-9 has the same structure as the first dovetail boss 6-6; the top of the second offset unit 6-3 is provided with a second dovetail groove 6-10 along the width direction, and the bottom of the second offset unit 6-3 is a cylindrical structure, the second dovetail groove 6-10 has the same structure as the first dovetail groove 6-8, the second dovetail groove 6-10 and the second dovetail boss 6-9 are matched with each other in a dovetail shape and slide along the dovetail groove direction.

[0073] In this embodiment, the fastening unit 6-1 and the first offset unit 6-2 are both square structures, the second offset unit 6-3 has a square structure on the top and a cylindrical structure on the bottom, the three fixing screw holes on the top of the fastening unit 6-1 are respectively the three vertices of the triangle, and the stability of the triangle is used to improve the stability of the connection between the fastening unit 6-1 and the adapter 9, the first dovetail boss 6-6 is arranged along the length direction of the fastening unit 6-1, and the first dovetail groove 6-8 is arranged along the length direction of the first offset unit 6-2, and the size of the first dovetail boss 6-6 matches the size of the first dovetail groove 6-8, so the length of the fastening unit 6-1 is consistent with the length of the first offset unit 6-2, and the first dovetail boss 6-6 is slidably engaged with the first dovetail groove 6 -8 and fills the first dovetail groove 6-8, and both ends of the first dovetail boss 6-6 and the first dovetail groove 6-8 are provided with displacement detection members 6-4, and the two ends of the displacement detection member 6-4 along the length direction are respectively connected to the first dovetail boss 6-6 and the first dovetail groove 6-8, when the first offset unit 6-2 is offset relative to the fastening unit 6-1 along the length direction, the displacement detection member 6-4 is deformed, and the displacement detection sensor on the displacement detection member 6-4 detects the offset of the first offset unit 6-2 and sends the offset to the computer, the fastening unit 6-1 is clamped with the first offset unit 6-2, and the first offset unit 6-2 can be offset forward or backward along the fastening unit 6-1, thereby improving the accuracy of position detection;

[0074] The second dovetail boss 6-9 is horizontally arranged at the bottom of the first offset unit 6-2 along the width direction of the first offset unit 6-2, the second dovetail boss 6-9 is perpendicular to the first dovetail groove 6-8, the direction of the second dovetail groove 6-10 is consistent with the direction of the second dovetail boss 6-9, then the width of the second offset unit 6-3 is consistent with the width of the first offset unit 6-2, the position of the second dovetail groove 6-10 matches the position of the second dovetail boss 6-9, the second dovetail boss 6-9 is slidably engaged in the second dovetail groove 6-10, and the two ends of the second dovetail boss 6-9 engaged with the second dovetail groove 6-10 are both provided with a displacement detection member 6-4, and the displacement detection member 6-4 is arranged along the length The two ends of the direction are respectively connected with the second dovetail boss 6-9 and the second dovetail groove 6-10. When the second offset unit 6-3 is offset relative to the first offset unit 6-2 in the width direction, the displacement detection piece 6-4 located at the end of the second dovetail boss 6-9 and the second dovetail groove 6-10 is deformed. Then, the displacement detection sensor on the displacement detection piece 6-4 detects the offset of the second offset unit 6-3 relative to the first offset unit 6-2, and sends the offset to the computer, so that the second offset unit 6-3 is clamped with the first offset unit 6-2 and the second offset unit 6-3 can be offset to the left or right along the first offset unit 6-2, thereby improving the accuracy of position detection.

[0075] In another possible embodiment, different from the above embodiment, the fastening unit 6-1, the first offset unit 6-2 and the second offset unit 6-3 are all cylindrical structures and have the same diameter, the first dovetail boss 6-6 at the bottom of the fastening unit 6-1 is arranged along the diameter of the fastening unit 6-1, the first dovetail groove 6-8 at the top of the first offset unit 6-2 is arranged along the diameter of the first offset unit 6-2, the first dovetail boss 6-6 is slidably engaged with the first dovetail groove 6-8, the second dovetail boss 6-9 at the bottom of the first offset unit 6-2 is arranged along the diameter of the first offset unit 6-2, and the second dovetail boss 6-9 is perpendicular to the first dovetail groove 6-8, the second dovetail groove 6-10 at the top of the second offset unit 6-3 is arranged along the diameter of the second offset unit 6-3, and the second dovetail boss 6-9 is slidably engaged with the second dovetail groove 6-10.

[0076] Furthermore, a magnet 6-7 is installed at the bottom of the second offset unit 6-3 for adsorbing the position detection component 6-5 to improve the stability of the position detection component 6-5.

[0077] like Figure 5 As shown, the bottom frame 1 includes a right support plate 1-1, a rear support plate 1-6, a horizontal support plate 1-7 and a left support plate 1-8. The right support plate 1-1 is the same size as the left support plate 1-8. The left support plate 1-8 and the right support plate 1-1 are respectively fastened to the left and right ends of the horizontal support plate 1-7 along the length direction. The rear support plate 1-6 is installed on the rear side of the horizontal support plate 1-7. The top of the rear support plate 1-6 is connected to the bottom of the horizontal support plate 1-7. The left and right ends of the rear support plate 1-6 along the length direction are respectively connected to the left support plate 1-8 and the right support plate 1-1. A clamping through hole 1-9 is provided in the middle of the horizontal support plate 1-7 to facilitate the installation of the clamping module 3.

[0078] In this embodiment, the right support plate 1-1 and the left support plate 1-8 are arranged opposite to each other at the bottom of the horizontal support plate 1-7. The right support plate 1-1 and the left support plate 1-8 jointly support the horizontal support plate 1-7 upward to keep the horizontal support plate 1-7 in a horizontal state. The clamping module 3 is installed at the clamping through hole 1-9 in the middle of the horizontal support plate 1-7. The clamping through hole 1-9 is located in the middle of the horizontal support plate 1-7 to facilitate the stability of the bottom frame 1 after the clamping module 3 is installed. A bottom motor connecting plate is also installed at the bottom of the horizontal support plate 1-7. The bottom motor connecting plate is an L-shaped structure. The lateral end of the bottom motor connecting plate is fastened to the horizontal support plate 1-7 by screws, and the vertical end of the bottom motor connecting plate close to the rear support plate 1-6 is fastened to the rear support plate 1-6 by screws. The bottom motor connecting plate is used to connect the drive motor.

[0079] Furthermore, a horizontal connecting plate is provided at the bottom of the right support plate 1-1 and the left support plate 1-8. The horizontal connecting plate is horizontally arranged and is fastened to the right support plate 1-1 or the left support plate 1-8 in the middle along the length direction. The four corners of the horizontal connecting plate are fastened to the support platform to improve the stability of the bottom frame 1.

[0080] like Figure 1 As shown, the displacement mechanism includes an X-axis moving module 4, a Y-axis moving module 2 and a Z-axis moving module 5. There are two Y-axis moving modules 2. The two Y-axis moving modules 2 are horizontally mounted on the left and right side walls of the bottom frame 1, respectively. A vertical connecting member 7 is vertically mounted on each Y-axis moving module 2. The X-axis moving module 4 is arranged between the opposite vertical connecting members 7. The two end portions of the X-axis moving module 4 along the length direction are respectively connected to the two vertical connecting members 7. The Z-axis moving module 5 is arranged on the X-axis moving module 4 to facilitate the X-axis moving module 4 to drive the Z-axis moving module 5 to move. The X-axis moving module 4, the Y-axis moving module 2 and the Z-axis moving module 5 all include a supporting unit, a displacement unit and a guiding unit. The displacement unit and the guiding unit are both mounted on the supporting unit. The displacement unit is arranged in parallel with the guiding unit, and the displacement unit drives the guiding unit to move synchronously.

[0081] In this embodiment, the two Y-direction moving modules 2 are respectively horizontally installed on the side walls away from the right support plate 1-1 and the left support plate 1-8, the vertical connecting member 7 extends vertically upward, and the bottom of the vertical connecting member 7 along the length direction is connected to the Y-direction moving module 2, so that the Y-direction moving module 2 drives the vertical connecting member 7 to move along the Y-axis direction, and the top of the vertical connecting member 7 along the length direction is connected to the end of the X-direction moving module 4, and the X-direction moving module 4 is horizontally arranged between the two facing vertical connecting members 7, and the two end ends of the X-direction moving module 4 along the length direction are respectively The Z-direction moving module 5 is connected to the two facing vertical connecting members 7, and is perpendicular to the X-direction moving module 4. The Z-direction moving module 5 is connected to the X-direction moving module 4 so that the X-direction moving module 4 drives the Z-direction moving module 5 to move along the X-axis direction. The measuring module 6 is connected to the Z-direction moving module 5 through the connecting seat 9. With the cooperation of the Y-direction moving module 2 and the X-direction moving module 4, the measuring module 6 moves along the Y-axis direction and the X-axis direction. After the measuring module 6 moves to the target position, the Z-direction moving module 5 drives the measuring module 6 to move upward or downward in the vertical direction.

[0082] The vertical connecting member 7 includes a vertical supporting plate 2-8 and a shield 2-9. The vertical supporting plate 2-8 is connected to the Y-axis moving module 2 at the bottom along the length direction. A first connecting hole is provided at the top of the vertical supporting plate 2-8. The shield 2-9 is a hollow square structure. A second connecting hole is provided on the side wall of the shield 2-9 near the top. After the first connecting hole overlaps with the second connecting hole, the shield 2-9 is fastened to the outside of the vertical supporting plate 2-8.

[0083] The support unit comprises a support plate and a bearing seat. There are multiple bearing seats, which are arranged at intervals along the length direction of the support plate.

[0084] like Figure 5 As shown, in this embodiment, the support plate of the Y-axis moving module 2 includes an L-shaped support plate 1-2 and a first motor connecting plate 1-3, the bearing seat includes a first bearing seat 1-4 and a second bearing seat 1-5, the vertical end of the L-shaped support plate 1-2 is fastened to the side wall of the bottom frame 1, the first motor connecting plate 1-3 is vertically installed at the lateral end of the L-shaped support plate 1-2 near the end, the first bearing seat 1-4 and the second bearing seat 1-5 are spaced apart along the length direction of the L-shaped support plate 1-2, the first motor connecting plate 1-3 is provided with a first circular through hole for the output shaft of the motor to pass through, and the first bearing seat 1-4 is provided with a second circular through hole The first bearing seat 1-4 is vertically installed at the lateral end of the L-shaped support plate 1-2 and a distance is left between it and the first motor connecting plate 1-3. The second bearing seat 1-5 is vertically installed at the lateral end of the L-shaped support plate 1-2 away from the end of the first motor connecting plate 1-3. A third circular through hole is provided on the second bearing seat 1-5. The centers of the first circular through hole, the second circular through hole and the third circular through hole are located on the same straight line. Support units are installed on the side walls away from the right support plate 1-1 and the left support plate 1-8. The support units on the right support plate 1-1 and the left support plate 1-8 have the same height and jointly support the displacement unit and the guide unit upward.

[0085] like Figure 6 , Figure 7 As shown, the support plate of the X-axis moving module 4 includes a first support plate 4-3 and a second support plate 4-4, the bearing seat is a third bearing seat 4-6, the first support plate 4-3 and the second support plate 4-4 are connected along the length direction to form an L-shaped structure, the number of the third bearing seat 4-6 is two, the two third bearing seats 4-6 are arranged at the two end portions of the second support plate 4-4 along the length direction of the second support plate 4-4, and the center of the third bearing seat 4-6 overlaps with the center of the second connecting hole;

[0086] like Figure 8 As shown, the support plate of the Z-axis moving module 5 includes a transverse plate and a vertical plate. The number of the vertical plates is four. The four vertical plates are connected along the length direction to form a hollow square structure with openings at both ends. The transverse plate is fixedly installed on the top of the hollow square structure. The bearing seat is the fourth bearing seat, and the fourth bearing seat is installed at the bottom of the hollow square structure to form a Z-axis frame 5-1.

[0087] The displacement unit includes a driving part and a moving part. The driving part is connected to the moving part and drives the moving part to move. The driving part includes a driving motor and a coupling. The output shaft of the driving motor is connected to the coupling, and the side of the coupling away from the driving motor is connected to the moving part; the moving part includes a screw, a screw nut, a rolling bearing and an end cover. The two end portions of the screw along the length direction are respectively connected to the coupling and the rolling bearing, and the side of the rolling bearing away from the screw is connected to the end cover.

[0088] In this embodiment, Figure 5 , Fig. 9 As shown, the driving motor of the Y-direction moving module 2 is the Y-direction driving motor 2-1, the coupling of the Y-direction moving module 2 is the first coupling 2-2, the Y-direction driving motor 2-1 is installed at the lateral end of the L-shaped supporting plate 1-2, the output shaft of the Y-direction driving motor 2-1 passes through the first circular through hole on the first motor connecting plate 1-3, the first coupling 2-2 is installed in the second circular through hole on the first bearing seat 1-4, the output shaft of the Y-direction driving motor 2-1 passes through the first circular through hole and is connected to the first coupling 2-2, the lead screw of the Y-direction moving module 2 is the Y-direction lead screw 2-6, and the lead screw nut is the first lead screw nut The mother 2-3, the rolling bearing is the second rolling bearing, the end cover is the second end cover, the second rolling bearing is installed in the third circular through hole of the second bearing seat 1-5, the first lead screw nut 2-3 is installed on the Y-direction lead screw 2-6, and the two end portions of the Y-direction lead screw 2-6 along the length direction are respectively connected with the first coupling 2-2 and the second rolling bearing, the first lead screw nut 2-3 is located between the first coupling 2-2 and the second rolling bearing, the Y-direction drive motor 2-1 is started, the Y-direction drive motor 2-1 drives the Y-direction lead screw 2-6 to rotate synchronously, and the first lead screw nut 2-3 moves linearly along the Y-direction lead screw 2-6;

[0089] like Fig.10 , Figure 6 and Figure 7As shown, the driving motor of the X-axis moving module 4 is the X-axis driving motor 2-12, the coupling of the X-axis moving module 4 is the second coupling, the second coupling connects the output shaft of the X-axis driving motor 2-12 and the driving gear, the driving part of the X-axis moving module 4 also includes a belt 2-13, a belt gear 2-14, a gasket 2-15, a first rolling bearing 2-10 and a bearing end cover 2-11, the X-axis driving motor 2-12, the driving gear, the belt 2-13, the belt gear 2-14, the gasket 2-15 and the first rolling bearing 2-10 The first rolling bearing 2-10 is arranged in the first connecting hole, and the bearing end cover 2-11 is installed on the outer wall of the shield 2-9. The X-axis driving motor 2-12 is located at the bottom of the shield 2-9. The output shaft of the X-axis driving motor 2-12 is connected with the driving gear through the second coupling. The driving gear is connected with the belt gear 2-14 through the belt 2-13. The belt gear 2-14 is located at the second connecting hole. The gasket 2-15 is arranged between the belt gear 2-14 and the inner wall of the shield 2-9. The first rolling bearing 2-10 is arranged in the first connecting hole. The bearing end cover 2-11 is installed on the outer wall of the shield 2-9. The X-axis driving motor 2-12 is located at the bottom of the shield 2-9. The output shaft of the X-axis driving motor 2-12 is connected with the driving gear through the second coupling. The driving gear is connected with the belt gear 2-14 through the belt 2-13. The belt gear 2-14 is located at the second connecting hole. The gasket 2-15 is arranged between the belt gear 2-14 and the inner wall of the shield 2-9. 11 is fastened to the outside of the first rolling bearing 2-10, the lead screw of the X-direction moving module 4 is the X-direction lead screw 4-7, the lead screw nut is the second lead screw nut 4-10, the rolling bearing is the X-direction rolling bearing, and the end cover is the first end cover 4-5. The number of the X-direction rolling bearing and the first end cover 4-5 are both two, and an X-direction rolling bearing is installed in each third bearing seat 4-6. The first end cover 4-5 is installed on the side away from the two third bearing seats 4-6, and the second lead screw nut 4-10 is installed on the X-direction lead screw 4-7 and is located at the two third bearing seats 4-6, the ends of the X-axis lead screw 4-7 along the length direction are respectively connected to the two third bearing seats 4-6 through X-axis rolling bearings, the end of the X-axis lead screw 4-7 close to the shield 2-9 passes through the first rolling bearing 2-10 and is fastened to the belt gear 2-14, the X-axis drive motor 2-12 is started, the X-axis drive motor 2-12 drives the belt gear 2-14 to rotate synchronously through the drive gear, the belt gear 2-14 drives the X-axis lead screw 4-7 to rotate, and the second lead screw nut 4-10 moves horizontally along the X-axis lead screw 4-7;

[0090] like Figure 8As shown, the driving motor of the Z-direction moving module 5 is the Z-direction motor 5-8, the coupling is the third coupling 5-7, the Z-direction motor 5-8 is located at the top of the Z-direction frame 5-1, the output shaft of the Z-direction motor 5-8 passes downward through the Z-direction frame 5-1 and is connected to the third coupling 5-7, the end of the third coupling 5-7 away from the Z-direction motor 5-8 is connected to the moving part of the Z-direction moving module 5, the lead screw of the Z-direction moving module 5 is the Z-direction lead screw 5-6, the lead screw nut is the Z-direction lead screw nut 5-5, the rolling bearing is the Z-direction rolling bearing 5-2, the end cover is the third end cover 5-3, the Z-direction lead screw 5-6 is along the Z-direction frame 5 -1 is vertically arranged in the height direction, the Z-axis rolling bearing 5-2 is installed at the bottom of the Z-axis frame 5-1, the third end cover 5-3 is installed at the Z-axis rolling bearing 5-2, the central axis of the Z-axis rolling bearing 5-2 and the central axis of the third coupling 5-7 are located on the same straight line, the Z-axis lead screw nut 5-5 is located on the Z-axis lead screw 5-6, and the two end portions of the Z-axis lead screw 5-6 are respectively connected to the third coupling 5-7 and the Z-axis rolling bearing 5-2, the Z-axis motor 5-8 is started, and the Z-axis motor 5-8 drives the Z-axis lead screw 5-6 to rotate synchronously, and the Z-axis lead screw nut 5-5 moves linearly along the Z-axis lead screw 5-6.

[0091] Furthermore, an intermediate baffle is provided inside the Z-axis frame 5-1, and a distance is left between the intermediate baffle and the horizontal plate at the top of the Z-axis frame 5-1. An anti-collision washer 5-9 is provided under the intermediate baffle to prevent the Z-axis lead screw nut 5-5 from colliding with the intermediate baffle when moving upward. A baffle through hole is provided on the intermediate baffle, and the baffle through hole is on the same straight line as the center of the fourth bearing seat. A rolling bearing is built into the baffle through hole, and a bearing end cover is installed on the side wall of the intermediate baffle to prevent the rolling bearing from moving.

[0092] The guide unit includes a linear guide rail, a guide rail slider and a connecting piece. The linear guide rail is arranged parallel to the lead screw. The guide rail slider is embedded in the linear guide rail. One end of the connecting piece is connected to the guide rail slider, and the end of the connecting piece away from the guide rail slider is connected to the lead screw nut.

[0093] like Fig. 9As shown, there are two Y-axis moving modules 2, and the structures of the two Y-axis moving modules 2 are the same. The linear guide rail of the Y-axis moving module 2 is the first guide rail 2-7, the guide rail slider is the first guide rail slider 2-5, and the connecting piece is the Y-axis slider 2-4. The first guide rail 2-7 is horizontally installed on the side wall of the bottom frame 1, and the first guide rail 2-7 is parallel to the Y-axis lead screw 2-6. The first guide rail slider 2-5 is embedded in the first guide rail 2-7 and slides along the first guide rail 2-7. The first guide rail slider 2-5 is fastened to the first lead screw nut 2-3 through the Y-axis slider 2-4. The Y-axis slider 2-4 is fastened to the vertical support plate 2-8 away from the side wall of the first guide rail 2-7, which is convenient for the first lead screw nut The nut 2-3 drives the vertical support plate 2-8 and the first guide rail slider 2-5 to move synchronously, and the Y-direction drive motor 2-1 drives the Y-direction lead screw 2-6 to rotate synchronously, then the first lead screw nut 2-3 makes a linear motion along the Y-direction lead screw 2-6, and the first lead screw nut 2-3 drives the first guide rail slider 2-5 and the vertical support plate 2-8 to make a linear motion synchronously along the Y-axis direction. Since the top of the vertical support plate 2-8 is connected to the X-direction moving module 4, the X-direction moving module 4 is connected to the Z-direction moving module 5, and the Z-direction moving module 5 is connected to the measuring module 6, the movement of the first lead screw nut 2-3 drives the measuring module 6 to move along the Y-axis direction, that is, the measuring module 6 moves in a direction away from or close to the clamping module 3;

[0094] like Figure 6 , Figure 7As shown, the linear guide rail of the X-axis moving module 4 is the second guide rail 4-2, the guide rail slider is the second guide rail slider 4-8, and the connecting piece includes a connecting slider 4-9 and a Z-axis connecting plate 4-1. The second guide rail 4-2 is horizontally installed on the side of the first support plate 4-3 away from the X-axis lead screw 4-7 along the length direction of the first support plate 4-3. The second guide rail slider 4-8 is embedded in the second guide rail 4-2 and can slide along the second guide rail 4-2. The second guide rail slider 4-8 is connected to the Z-axis connecting plate 4-1 away from the side wall of the second guide rail 4-2. The first support plate 4-3 is provided with two through grooves along the length direction. The two through grooves are symmetrically arranged on both sides of the second guide rail 4-2. The connecting slider 4-9 is a U-shaped structure. The length of the lateral end of the connecting slider 4-9 is consistent with the distance between the two through grooves. The thickness of the vertical end of the connecting slider 4-9 is consistent with the width of the through groove, so that the vertical end of the connecting slider 4-9 is connected to the Z-axis connecting plate 4-1 after passing through the through groove. The lateral end of the slider 4-9 is tightly connected with the second lead screw nut 4-10, and the two vertical ends of the connecting slider 4-9 are horizontally passed through two symmetrical through grooves and are tightly connected with the Z-direction connecting plate 4-1 and the second guide rail slider 4-8. The X-direction driving motor 2-12 drives the belt gear 2-14 to rotate synchronously, and the belt gear 2-14 drives the X-direction lead screw 4-7 connected thereto to rotate, then the second lead screw nut 4-10 moves horizontally along the X-direction lead screw 4-7, the second lead screw nut 4-10 drives the connecting slider 4-9 and the second guide rail slider 4-8 to move horizontally along the X-axis direction, and the Z-direction connecting plate 4-1 at the vertical end of the connecting slider 4-9 moves horizontally along the X-axis direction synchronously, because the side of the Z-direction connecting plate 4-1 away from the connecting slider 4-9 is connected to the Z-direction moving module 5, and the bottom of the Z-direction moving module 5 is connected to the measuring module 6, then the horizontal movement of the Z-direction connecting plate 4-1 along the X-axis direction is the horizontal movement of the measuring module 6 along the X-axis direction;

[0095] like Figure 8As shown, the linear guide rail of the Z-axis moving module 5 is the third guide rail 5-4, the guide rail slider is the third guide rail slider 5-11, and the connecting piece includes a screw nut connecting block 5-10. The third guide rail 5-4 is installed on the inner wall of the Z-axis frame 5-1, and the third guide rail 5-4 is parallel to the Z-axis lead screw 5-6. The third guide rail slider 5-11 is embedded in the third guide rail 5-4. The side wall of the third guide rail slider 5-11 away from the third guide rail 5-4 is tightly connected to the screw nut connecting block 5-10. The side wall of the screw nut connecting block 5-10 away from the third guide rail slider 5-11 is tightly connected to the Z-axis lead screw nut 5-5, so that the Z-axis lead screw nut 5-5 drives the third guide rail slider 5-11 to move along the Z-axis direction. The middle part of the Z-axis frame 5-1 along the height direction is connected to the Z-axis connecting plate 4 -1 connection, the Z-axis frame 5-1 is provided with a slide groove along the height direction, the number of the slide grooves is two, and the two slide grooves are symmetrically arranged on the side wall of the Z-axis frame 5-1 away from the Z-axis connecting plate 4-1. The adapter seat 9 is an L-shaped structure, and a groove is provided on the side of the vertical end of the adapter seat 9 away from the lateral end along the height direction. The width of the groove is consistent with the shortest distance between the two slide grooves on the Z-axis frame 5-1, which is convenient for the adapter seat 9 to be embedded in the Z-axis frame 5-1. The part of the adapter seat 9 embedded in the slide groove is fastened to the Z-axis lead screw nut 5-5 by screws, which is convenient for the Z-axis lead screw nut 5-5 to drive the third guide rail slider 5-11 and the adapter seat 9 to move up and down along the Z-axis direction. The lateral end of the adapter seat 9 is fastened to the fastening unit 6-1, which is convenient for the adapter seat 9 to drive the measuring module 6 to move up and down along the Z-axis direction.

[0096] like Fig.11 As shown, the clamping module 3 includes a worm 3-1, a worm wheel 3-2, a rolling bearing 3-3, an adapter plate 3-4, a thrust bearing seat 3-5, a thrust bearing 3-6, a three-jaw chuck 3-7, a pressure plate 3-8, a fixed shaft 3-9 and a transmission shaft 3-10. The transmission shaft 3-10 is a T-shaped structure. The vertical end of the transmission shaft 3-10 passes downward through the bottom frame 1 and is key-connected with the worm wheel 3-2. The worm wheel 3-2 is meshed with the worm 3-1. The end of the worm 3-1 is connected to the drive motor through a coupling. The lateral end of the transmission shaft 3-10 is connected to the bottom of the three-jaw chuck 3-7. The flange is fastened to the bottom, the three-jaw chuck 3-7 is used to position the workpiece 8 to be measured, the worm 3-1 and the worm wheel 3-2 are both located on the lower side of the bottom frame 1, the rolling bearing 3-3 is arranged at the contact position between the vertical end of the transmission shaft 3-10 and the bottom frame 1, the thrust bearing 3-6 is installed between the lateral end of the transmission shaft 3-10 and the bottom frame 1 through the thrust bearing seat 3-5, the fixed shaft 3-9 is arranged in the middle of the three-jaw chuck 3-7 and is fixed to the three-jaw chuck 3-7 and extends vertically upward, and the pressure plate 3-8 is arranged on the top of the fixed shaft 3-9 to press the workpiece 8 to be measured through a nut.

[0097] In this embodiment, the vertical end of the transmission shaft 3-10 passes downward through the clamping hole 1-9 in the middle of the horizontal support plate 1-7, and the lateral ends of the transmission shaft 3-10 are located on both sides of the clamping hole 1-9 and are supported upward by thrust bearings 3-6 respectively. The contact portion between the thrust bearing 3-6 and the horizontal support plate 1-7 is provided with an adapter plate 3-4, and the outer wall of the transmission shaft 3-10 is connected to the inner wall of the clamping hole 1-9 by a rolling bearing 3-3 to avoid direct contact between the transmission shaft 3-10 and the clamping hole 1-9 and causing wear. The end of the transmission shaft 3-10 located on the lower side of the horizontal support plate 1-7 is fastened to the worm gear 3-2, and the drive motor is mounted on the bottom motor connecting plate, and the output shaft of the drive motor is connected to the worm 3-1, which is convenient for The driving motor drives the worm 3-1 to rotate synchronously, and the worm 3-1 drives the worm wheel 3-2 to rotate, then the transmission shaft 3-10 and the worm wheel 3-2 rotate synchronously, and the top of the lateral end of the transmission shaft 3-10 is tightly connected with the three-jaw chuck 3-7, and the workpiece 8 to be measured is passed through the fixed shaft 3-9 and placed at the center of the three-jaw chuck 3-7, and the three-jaw chuck 3-7 clamps the workpiece 8 to be measured, and the pressure plate 3-8 is screwed into the fixed shaft 3-9 to press the workpiece 8 to be measured, so that the workpiece 8 to be measured keeps the position fixed. When the hole position of the workpiece 8 to be measured needs to be adjusted, the driving motor is started, and the driving motor drives the worm 3-1 to rotate, and the worm wheel 3-2 and the transmission shaft 3-10 rotate synchronously, then the transmission shaft 3-10 drives the workpiece 8 to be measured to rotate, so as to achieve the purpose of adjusting the hole position of the workpiece 8 to be measured.

[0098] A method for detecting the position tolerance of multiple holes using a multiple hole position tolerance detection device comprises the following steps:

[0099] Step S1: measurement preparation, replace the position detection member 6-5 of the corresponding diameter according to the aperture of the workpiece 8 to be measured, then return the X-axis moving module 4, the Y-axis moving module 2 and the Z-axis moving module 5 of the displacement mechanism to zero position, adjust the clamping module 3, and ensure that the entire detection device runs normally when idle;

[0100] Step S2: clamping the workpiece, and correctly positioning and clamping the workpiece 8 to be tested on the clamping module 3;

[0101] The workpiece 8 to be measured is positioned and clamped in the three-jaw chuck 3-7 of the clamping module 3. After positioning, it is clamped with the pressing plate 3-8.

[0102] Step S3: Probe alignment: The X-axis moving module 4, the Y-axis moving module 2 and the Z-axis moving module 5 of the displacement mechanism drive the position detection member 6-5 of the measuring module 6 to move, so that the axis of the position detection member 6-5 coincides with the geometric center axis of the uniformly distributed holes of the workpiece 8 to be measured, that is, the center axis A of the position reference circle is found, such as Fig.12 As shown, after alignment, the X-direction moving module 4 and the Y-direction moving module 2 remain stationary, the Z-direction moving module 5 is raised, and the position detection member 6-5 is raised a certain distance away from the workpiece 8 to be measured;

[0103] Step S4: align the first hole of the workpiece, operate the X-direction moving module 4 to drive the position detection member 6-5 of the measuring module 6 to move, the movement amount is the radius size of the reference circle, and the theoretical correct size of the multi-hole positioning circle of the workpiece 8 to be measured is obtained, then, drive the workpiece 8 to be measured to rotate slowly through the clamping module 3, and operate the Z-direction moving module 5 to make the position detection member 6-5 slide into the nearest hole of the workpiece 8 to be measured, and repeatedly rotate the clamping module 3 in both positive and negative directions to adjust the offset value of the first offset unit 6-2 and the second offset unit 6-3 to be the smallest, that is, when the deformation of the displacement detection member 6-4 is the smallest on the computer, the adjustment is completed, and the count value corresponding to the displacement detection member 6-4 on the computer is reset to zero;

[0104] Step S5: prepare for measurement, operate the Z-direction moving module 5 of the displacement mechanism to drive the position detection member 6-5 to lift upward, so that a safe distance for measurement is left between the position detection member 6-5 and the workpiece 8 to be measured;

[0105] Step S6: Formal measurement, operate the clamping module 3 to drive the workpiece 8 to be measured to rotate the measuring angle, assuming that the number of holes of the multi-hole position degree of the workpiece 8 to be measured is n, then the measuring angle is 360° / n, then operate the Z-direction moving module 5 of the displacement mechanism to drive the position degree detection member 6-5 to move downward along the Z-axis direction and slide into the hole to be measured, the first offset unit 6-2 or the second offset unit 6-3 or both will be offset, the displacement detection member 6-4 will be deformed, the displacement detection sensor on the displacement detection member 6-4 reads the deformation and transmits it to the computer, the displacement detection sensor indication on the displacement detection member 6-4 of the first offset unit 6-2 is recorded as ΔY, and the displacement detection sensor indication on the displacement detection member 6-4 of the second offset unit 6-3 is recorded as ΔX, then the calculation formula for the actual detection position degree error f of the hole is:

[0106] Step S7: Continue measuring, repeat steps S5-S6, and measure the position errors f of all n holes of the workpiece 8 to be measured;

[0107] Step S8: Data processing, recording the position error f obtained by measuring each hole, taking the maximum value as the actual error value of the multi-hole position of the workpiece 8 to be measured, if the value is less than or equal to the required tolerance value t of the workpiece, it is qualified, otherwise it is unqualified;

[0108] Step S9: After the detection is completed, the X-axis moving module 4, the Y-axis moving module 2 and the Z-axis moving module 5 of the displacement mechanism are manipulated to return to zero position, the workpiece is disassembled, and the measurement report is printed and submitted.

[0109] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A multi-hole position tolerance detection device, characterized in that: The invention comprises a bottom frame (1), a clamping module (3), a measuring module (6) and a displacement mechanism, wherein the clamping module (3) is installed at the top center of the bottom frame (1) for clamping a workpiece to be measured (8) and driving the workpiece to be measured (8) to rotate, the displacement mechanism is a gate-shaped structure, the bottom of the displacement mechanism is installed on the left and right sides of the bottom frame (1), the measuring module (6) is installed on the displacement mechanism so that the displacement mechanism drives the measuring module (6) to move along the X-axis, Y-axis or Z-axis direction, the measuring module (6) is used to detect the position error of the workpiece to be measured (8), and the measuring module (6) comprises a fastening The invention relates to a device for detecting a displacement mechanism comprising a first displacement unit (6-1), a first displacement unit (6-2), a second displacement unit (6-3) and a detection unit, wherein the top of the fastening unit (6-1) is fastened to the displacement mechanism via an adapter seat (9), the bottom of the fastening unit (6-1) is slidably engaged with the top of the first displacement unit (6-2) along the length direction by using a dovetail groove, and the first displacement unit (6-2) can slide along the length direction of the fastening unit (6-1), the bottom of the first displacement unit (6-2) is slidably engaged with the top of the second displacement unit (6-3) along the width direction by using a dovetail groove, and the second displacement unit (6-3) can slide along the length direction of the fastening unit (6-1). The first offset unit (6-2) slides in the width direction; the detection unit comprises a displacement detection member (6-4) and a position detection member (6-5); the number of the displacement detection members (6-4) is four; a displacement detection member (6-4) is provided on each of the two end faces in the length direction of the fastening unit (6-1) and the first offset unit (6-2); one end of the two displacement detection members (6-4) is fixed on the end face of the fastening unit (6-1), and the other end of the two displacement detection members (6-4) is fixed on the end face of the first offset unit (6-2); the second offset unit (6-3) and the first offset unit (6 -2) is also provided with a displacement detection member (6-4) on both side end faces in the width direction, one end of the two displacement detection members (6-4) is fixed on the end face of the first offset unit (6-2), and the other end of the two displacement detection members (6-4) is fixed on the end face of the second offset unit (6-3), the four displacement detection members (6-4) are used to detect the relative position offset between the fastening unit (6-1), the first offset unit (6-2), and the second offset unit (6-3), and the position detection member (6-5) is installed at the bottom of the second offset unit (6-3) to detect the hole position of the workpiece (8) to be measured.

2. A multi-hole position tolerance detection device according to claim 1, characterized in that: The top of the fastening unit (6-1) is provided with three fixing screw holes for fastening with the adapter seat (9), and the bottom of the fastening unit (6-1) is provided with a first dovetail boss (6-6) along the length direction; A first dovetail groove (6-8) is provided at the top of the first offset unit (6-2) along the length direction, the first dovetail boss (6-6) is matched with the first dovetail groove (6-8) in a dovetail shape and is slidably connected along the dovetail groove direction, and a second dovetail boss (6-9) is provided at the bottom of the first offset unit (6-2) along the width direction, and the second dovetail boss (6-9) has the same structure as the first dovetail boss (6-6); A second dovetail groove (6-10) is provided at the top of the second offset unit (6-3) along the width direction, the bottom of the second offset unit (6-3) is a cylindrical structure, the second dovetail groove (6-10) has the same structure as the first dovetail groove (6-8), and the second dovetail groove (6-10) and the second dovetail boss (6-9) are matched in a dovetail shape and slide along the dovetail groove direction.

3. A multi-hole position tolerance detection device according to claim 1, characterized in that: The bottom frame (1) comprises a right support plate (1-1), a rear support plate (1-6), a horizontal support plate (1-7) and a left support plate (1-8); the right support plate (1-1) is the same size as the left support plate (1-8); the left support plate (1-8) and the right support plate (1-1) are respectively fastened to the left and right ends of the horizontal support plate (1-7) along the length direction; the rear support plate (1-6) is installed on the rear side of the horizontal support plate (1-7); the top of the rear support plate (1-6) is connected to the bottom of the horizontal support plate (1-7); the left and right ends of the rear support plate (1-6) along the length direction are respectively connected to the left support plate (1-8) and the right support plate (1-1); and a clamping through hole (1-9) is provided in the middle of the horizontal support plate (1-7) for facilitating the installation of the clamping module (3).

4. A multi-hole position tolerance detection device according to claim 1, characterized in that: The displacement mechanism comprises an X-direction moving module (4), a Y-direction moving module (2) and a Z-direction moving module (5). The number of the Y-direction moving modules (2) is two. The two Y-direction moving modules (2) are respectively horizontally mounted on the left and right side walls of the bottom frame (1). A vertical connecting member (7) is vertically mounted on each Y-direction moving module (2). The X-direction moving module (4) is arranged between the vertical connecting members (7) facing each other. The two end portions of the X-direction moving module (4) along the length direction are respectively connected to the two vertical connecting members (7). The Z-direction moving module (5) is arranged on the X-direction moving module (4) so ​​that the X-direction moving module (4) drives the Z-direction moving module (5) to move. The X-direction moving module (4), the Y-direction moving module (2) and the Z-direction moving module (5) all comprise a supporting unit, a displacement unit and a guiding unit. The displacement unit and the guiding unit are both mounted on the supporting unit. The displacement unit and the guiding unit are arranged in parallel. The displacement unit drives the guiding unit to move synchronously.

5. A multi-hole position tolerance detection device according to claim 4, characterized in that: The support unit comprises a support plate and a bearing seat. There are multiple bearing seats, which are arranged at intervals along the length direction of the support plate.

6. A multi-hole position tolerance detection device according to claim 4, characterized in that: The displacement unit includes a driving part and a moving part, the driving part is connected to the moving part and drives the moving part to move, the driving part includes a driving motor and a coupling, the output shaft of the driving motor is connected to the coupling, and the side of the coupling away from the driving motor is connected to the moving part; the moving part includes a lead screw, a lead screw nut, a rolling bearing and an end cover, the two end portions of the lead screw along the length direction are respectively connected to the coupling and the rolling bearing, and the side of the rolling bearing away from the lead screw is connected to the end cover.

7. A multi-hole position tolerance detection device according to claim 4, characterized in that: The guide unit includes a linear guide rail, a guide rail slider and a connecting piece. The linear guide rail is arranged parallel to the lead screw. The guide rail slider is embedded in the linear guide rail. One end of the connecting piece is connected to the guide rail slider. The end of the connecting piece away from the guide rail slider is connected to the lead screw nut.

8. A multi-hole position tolerance detection device according to claim 1, characterized in that: The clamping module (3) comprises a worm (3-1), a worm wheel (3-2), a rolling bearing (3-3), an adapter plate (3-4), a thrust bearing seat (3-5), a thrust bearing (3-6), a three-jaw chuck (3-7), a pressure plate (3-8), a fixed shaft (3-9) and a transmission shaft (3-10); the transmission shaft (3-10) is a T-shaped structure; the vertical end of the transmission shaft (3-10) passes downward through the bottom frame (1) and is key-connected with the worm wheel (3-2); the worm wheel (3-2) is meshed with the worm (3-1); the end of the worm (3-1) is connected to the drive motor via a coupling; the lateral end of the transmission shaft (3-10) is connected to the lateral end of the three-jaw chuck (3-7); The bottom flange is fastened and connected, the three-jaw chuck (3-7) is used to position the workpiece (8) to be measured, the worm (3-1) and the worm wheel (3-2) are both located on the lower side of the bottom frame (1), the rolling bearing (3-3) is arranged at the contact position between the vertical end of the transmission shaft (3-10) and the bottom frame (1), the thrust bearing (3-6) is installed between the lateral end of the transmission shaft (3-10) and the bottom frame (1) through a thrust bearing seat (3-5), the fixed shaft (3-9) is arranged in the middle of the three-jaw chuck (3-7) and is fixed to the three-jaw chuck (3-7) and extends vertically upward, and the pressure plate (3-8) is arranged on the top of the fixed shaft (3-9) and presses the workpiece (8) to be measured through a nut.

9. A method for detecting the position tolerance of multiple holes by using a multi-hole position tolerance detection device according to claim 4, characterized in that: The following steps are involved: Step S1: measurement preparation, replace the position detection member (6-5) of the corresponding diameter according to the aperture of the workpiece (8) to be measured, then return the X-axis moving module (4), the Y-axis moving module (2) and the Z-axis moving module (5) of the displacement mechanism to zero position, adjust the clamping module (3), and ensure that the entire detection device runs normally when idle; Step S2: clamping the workpiece, and correctly positioning and clamping the workpiece to be tested (8) on the clamping module (3); Step S3: aligning the measuring needle, driving the position detection component (6-5) of the measuring module (6) to move through the X-direction moving module (4), the Y-direction moving module (2) and the Z-direction moving module (5) of the displacement mechanism, so that the axis of the position detection component (6-5) coincides with the geometric center axis of the uniformly distributed holes of the workpiece (8) to be measured, that is, finding the center axis A of the position reference circle. After alignment, the X-direction moving module (4) and the Y-direction moving module (2) remain stationary, and the Z-direction moving module (5) is raised, so that the position detection component (6-5) is lifted a certain distance away from the workpiece (8) to be measured; Step S4: aligning the first hole of the workpiece, operating the X-direction moving module (4) to drive the position detection member (6-5) of the measuring module (6) to move, the movement amount being the radius size of the reference circle, and obtaining the theoretical correct size of the multi-hole positioning circle of the workpiece (8) to be measured, then driving the workpiece (8) to be measured to rotate slowly through the clamping module (3), and operating the Z-direction moving module (5) to make the position detection member (6-5) slide into the nearest hole of the workpiece (8) to be measured, and repeatedly rotating the clamping module (3) in both positive and negative directions to adjust the offset value of the first offset unit (6-2) and the second offset unit (6-3) to be the minimum, that is, when the deformation of the displacement detection member (6-4) is the smallest on the computer, the adjustment is completed, and the count value corresponding to the displacement detection member (6-4) on the computer is reset to zero; Step S5: preparing for measurement, operating the Z-direction moving module (5) of the displacement mechanism to drive the position detection member (6-5) to lift upward, so that a measurement safety distance is left between the position detection member (6-5) and the workpiece to be measured (8); Step S6: Formal measurement, operate the clamping module (3) to drive the workpiece (8) to be measured to rotate the measurement angle, assuming that the number of holes of the multi-hole position measurement of the workpiece (8) to be measured is n, then the measurement angle is 360° / n, then operate the Z-direction moving module (5) of the displacement mechanism to drive the position measurement detection member (6-5) to move downward along the Z-axis direction and slide into the hole to be measured, the first offset unit (6-2) or the second offset unit (6-3) or both will be offset, the displacement detection member (6-4) will be deformed, the displacement detection sensor on the displacement detection member (6-4) reads the deformation and transmits it to the computer, the displacement detection sensor indication on the displacement detection member (6-4) of the first offset unit (6-2) is recorded as ΔY, and the displacement detection sensor indication on the displacement detection member (6-4) of the second offset unit (6-3) is recorded as ΔX, then the calculation formula for the actual detection position error f of the hole is: Step S7: Continue measuring, repeat steps S5-S6, and measure the position errors f of all n holes of the workpiece (8); Step S8: data processing, recording the position error f obtained by measuring each hole, taking the maximum value as the actual error value of the multi-hole position of the workpiece (8) to be measured, if the value is less than or equal to the required tolerance value t of the workpiece, it is qualified, otherwise it is unqualified; Step S9: After the detection is completed, the X-axis moving module (4), the Y-axis moving module (2) and the Z-axis moving module (5) of the displacement mechanism are manipulated to return to zero position, the workpiece is disassembled, and the measurement report is printed and submitted.

Images