Three-coordinate measuring fixture and measuring method

Abstract

The invention discloses a three-coordinate measuring fixture, comprising a base, a workbench, a frame body, a measuring machine, a sliding mechanism, an adjusting mechanism, a positioning mechanism and a clamping mechanism, wherein the workbench is arranged on the base, the adjusting mechanism is slidably connected with the frame body through a sliding mechanism, the adjusting mechanism comprises an adjusting cylinder, a ball screw, a moving assembly, a spring and a supporting frame, the moving assembly comprises a moving housing, a first gear, a second gear and a driving motor, the spring is located at the lower part of the moving assembly and is sleeved on the outer side of the ball screw, the lower end of the spring is connected to the clamping mechanism, and the positioning mechanism comprises a first positioning mechanism and a second positioning mechanism which are arranged relatively. The purpose of the invention is to provide a three-coordinate measuring fixture, so that the workpiece can be quickly positioned and aligned before detection, and the detection result can be ensured to be accurate and true; it can also realize fast up and down of batch products, without alignment, and directly run the detection program for measurement, which greatly improves efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fixtures, and in particular to a three-coordinate measuring fixture and a measuring method. Background Art

[0002] Three-coordinate measurement has been widely used in various sectors such as machinery manufacturing, automobile industry, electronics industry, aerospace industry and defense industry. Three-coordinate measurement plays an important role in product development and testing, and has become an indispensable measuring equipment for modern industrial measurement and quality control. In the scope of application, three-coordinate measurement also basically covers mechanical parts and electronic components and various shape tolerances and position tolerances. In the reverse development process of the product, three-coordinate measurement can enable researchers to quickly obtain the coordinate parameters of the reference product and provide data support for reverse development. In product testing, three-coordinate measurement can enable researchers to determine whether the produced product is the same as the design and whether it is within the allowable error range. Three-coordinate measurement is to detect whether the part processing meets the drawing size requirements. It is necessary to measure each position that needs to be tested with great precision, but often due to the irregular and inconsistent placement of the workpiece, the test results are biased. Therefore, a fixture is needed to quickly locate the part before testing. The existing three-coordinate fixture has a slow clamping speed and cannot accurately locate the workpiece, resulting in inaccurate measurement. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a three-coordinate measuring fixture and measuring method, which can realize rapid positioning and alignment of the workpiece before detection, and can also realize rapid loading and unloading of batch products without alignment, and directly run the detection program for measurement, thereby greatly improving efficiency.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a three-coordinate measuring fixture, including a base, a workbench, a frame body, a measuring machine, a sliding mechanism, an adjusting mechanism, a positioning mechanism and a clamping mechanism, wherein the workbench is arranged on the base, and the adjusting mechanism is slidably connected to the frame body through a sliding mechanism, and the adjusting mechanism includes an adjusting cylinder, a ball screw, a moving assembly, a spring and a support frame, and the ball screw is fixedly connected to the support frame, and the moving assembly includes a moving housing, a first gear, a second gear and a driving motor, and the moving housing is rotatably mounted with a power input shaft, one end of the power input shaft extends out of the moving housing and is connected to the driving motor, and the other end of the power input shaft is fixedly connected with a first gear, and the second gear is meshed with the first gear, A ball screw nut that cooperates with the second gear is rotatably installed in the movable housing, and the ball screw that cooperates with the ball screw nut is rotatably installed in the movable housing. The spring is located at the lower part of the movable component and is sleeved on the outside of the ball screw. The lower end of the spring is connected to the clamping mechanism. The positioning mechanism includes a first positioning mechanism and a second positioning mechanism that are relatively arranged. The first positioning mechanism includes a first mounting plate and a positioning assembly, and the second positioning mechanism includes a second mounting plate and a positioning assembly. The positioning assembly includes a clamping cylinder, a chuck, and a connecting rod. The clamping cylinder is transmission-connected to the chuck through a connecting rod. A number of support assemblies are provided on the first mounting plate and the second mounting plate, and the support assemblies include a cylindrical support seat and a pin that penetrates the support seat and is adjustably arranged.

[0005] Furthermore, the frame body includes two fixed blocks connected to the base, fixed rods arranged on both sides of the fixed blocks and fixed seats arranged on the tops of the fixed rods, and the fixed seats are fixedly connected to the fixed rods.

[0006] Furthermore, the sliding mechanism includes a slide rail and a slider, the slide rail is fixedly arranged on a fixed seat, the slider is arranged on a side of the adjustment mechanism close to the frame body, and the slider is slidably connected to the slide rail.

[0007] Furthermore, the clamping mechanism includes a clamping block and a connecting block, the connecting block is fixedly connected to the bottom end of the spring, and the clamping block is fixedly connected to the connecting block.

[0008] Furthermore, the first mounting plate is in an "L" shape and is fixedly connected to the workbench.

[0009] Furthermore, the second mounting plate includes a long side and a short side, the short side is arranged parallel to the workbench and fixed on the upper surface of the workbench, and the long side forms an angle with the workbench.

[0010] Furthermore, a plurality of the support assemblies are fixedly connected to the first mounting plate and the second mounting plate, and are located between a plurality of the positioning assemblies.

[0011] Furthermore, limiting screws are arranged between the slide rails, and the number of the limiting screws is two.

[0012] To achieve the above object, according to a second aspect of the present invention, a three-coordinate measuring fixture measurement method is also provided, using the three-coordinate measuring fixture as described above, and the three-coordinate measuring fixture measurement method comprises the following steps:

[0013] S1: Before measurement, the part to be measured is clamped on the first positioning mechanism and the second positioning mechanism on the workbench and fixed according to the clamping requirements. The part to be measured is first placed on the support assembly, and the part to be measured is initially supported and fixed by the latch, and then the clamping cylinder drives the chuck to clamp the part to be measured through the connecting rod;

[0014] S2: The adjusting mechanism is adjusted in position through the sliding mechanism, and the spring is compressed by moving the moving assembly downward, thereby driving the connecting block and the pressing block to move downward, pressing the workpiece fixed on the workbench, and completing the quick tightening;

[0015] S3: Turn on the measuring machine, call the measuring program set in the measuring machine, and execute the measuring action until the measurement of the first type of parts to be measured is completed;

[0016] S4: Then follow the above steps and quickly switch to continue measuring other parts to be tested.

[0017] The advantages of the present invention are:

[0018] The purpose of the present invention is to provide a three-coordinate measuring fixture. By arranging a base, a workbench, a frame body, a measuring machine, a sliding mechanism, an adjusting mechanism, a positioning mechanism and a clamping mechanism, a force is applied to a spring by lifting and lowering a moving component, so that a clamping mechanism fixedly connected to the spring clamps a workpiece. Specifically, the moving component moves downward to compress the spring, thereby driving a connecting block and a clamping block to move downward to clamp the workpiece fixed on the workbench; when the moving component moves upward, the spring is extended, thereby driving the connecting block and the clamping block to move upward to release the workpiece fixed on the workbench. The present invention enables the workpiece to be quickly positioned and aligned before detection, thereby ensuring that the detection result is accurate and true; it can also realize fast mounting and lowering of batch products without alignment, and directly run the detection program for measurement, thereby greatly improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the regulating mechanism of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the first positioning mechanism of the present invention.

[0023] Figure 4 It is a structural schematic diagram of the second positioning mechanism of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the support assembly of the present invention.

[0025] in:

[0026] 1. Base; 2. Workbench; 3. Fixed block; 4. Fixed rod; 5. Fixed seat; 6. Slide rail; 7. Adjustment mechanism; 71. Adjustment cylinder; 72. Ball screw; 73. Spring; 74. Support frame; 75. Moving housing; 76. Driving motor; 77. First gear; 78. Second gear; 8. Pressing block; 9. Connecting block; 10. First positioning mechanism; 101. First mounting plate; 102. Clamping cylinder; 103. Support assembly; 1031. Support seat; 1032. Latch; 104. Connecting rod; 105. Chuck; 11. Second positioning mechanism; 111. Second mounting plate; 1111. Short side; 1112. Long side; 12. Limit screw; DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1 A three-coordinate measuring fixture shown includes a base 1, a workbench 2, a frame body, a measuring machine, a sliding mechanism, an adjusting mechanism 7, a positioning mechanism and a clamping mechanism. The workbench 2 is arranged on the base 1, and the adjusting mechanism 7 is slidably connected to the frame body through a sliding mechanism.

[0031] The frame body includes two fixing blocks 3 connected to the base 1 , fixing rods 4 arranged on both sides of the fixing blocks 3 , and fixing seats 5 arranged on the tops of the fixing rods 4 , wherein the fixing seats 5 are fixedly connected to the fixing rods 4 .

[0032] The sliding mechanism includes a slide rail 6 and a slider. The slide rail 6 is fixedly disposed on a fixing seat 5 . The slider is disposed on a side of the adjustment mechanism 7 close to the frame body. The slider is slidably connected to the slide rail 6 .

[0033] like Figure 2 As shown, the adjustment mechanism 7 includes an adjustment cylinder 71, a ball screw 72, a moving assembly, a spring 73 and a support frame 74, wherein the ball screw 72 is fixedly connected to the support frame 74, and the moving assembly includes a moving housing 75, a first gear 77, a second gear 78 and a driving motor 76, wherein the moving housing 75 is rotatably mounted with a power input shaft, one end of the power input shaft extends out of the moving housing 75 and is connected to the driving motor 76, and the other end of the power input shaft is fixedly connected with the first gear 77, the second gear 78 and the driving motor 76. Engaged with the first gear 77, a ball screw 72 nut cooperating with the second gear 78 is rotatably installed in the movable housing 75, and the ball screw 72 cooperating with the ball screw 72 nut is rotatably installed in the movable housing 75. The power input shaft is driven by the drive motor 76, so that the rotation of the power input shaft drives the rotation of the first gear 77, thereby driving the rotation of the second gear 78, and then driving the rotation of the ball screw 72 nut, so that the ball screw 72 has axial displacement while rotating, thereby completing the lifting action.

[0034] The spring 73 is located at the lower part of the moving component and is sleeved on the outside of the ball screw 72. The lower end of the spring 73 is connected to the clamping mechanism. The clamping mechanism includes a clamping block 8 and a connecting block 9. The connecting block 9 is fixedly connected to the bottom end of the spring 73, and the clamping block 8 is fixedly connected to the connecting block 9.

[0035] The spring 73 is applied with force by the lifting and lowering of the moving assembly, so that the clamping mechanism fixedly connected to the spring 73 presses the workpiece. Specifically, the moving assembly moves downward to compress the spring 73, thereby driving the connecting block 9 and the clamping block 8 to move downward to press the workpiece fixed on the workbench 2; when the moving assembly moves upward, the spring 73 is extended, thereby driving the connecting block 9 and the clamping block 8 to move upward to release the workpiece fixed on the workbench 2.

[0036] The positioning mechanism includes a first positioning mechanism 10 and a second positioning mechanism 11 which are arranged opposite to each other. The first positioning mechanism 10 includes a first mounting plate 101 and a positioning assembly. The first mounting plate 101 is “L”-shaped and fixedly connected to the workbench 2 .

[0037] The second positioning mechanism 11 includes a second mounting plate 111 and a positioning assembly. The second mounting plate 111 includes a long side 1112 and a short side 1111. The short side 1111 is arranged parallel to the workbench 2 and fixed on the upper surface of the workbench 2. The long side 1112 has an angle with the workbench 2, and the angle close to the side of the first positioning mechanism 10 is 100-130°. In this embodiment, the angle between the long side 1112 and the short side 1111 is 110°, so as to better adapt to the shape of the workpiece and position and clamp the workpiece.

[0038] The positioning assembly includes a clamping cylinder 102 , a chuck 105 , and a connecting rod 104 . The clamping cylinder 102 is transmission-connected to the chuck 105 via the connecting rod 104 .

[0039] The part to be measured is positioned by the first positioning mechanism 10 and the second positioning mechanism 11 , and the clamping cylinder 102 drives the chuck 105 to clamp the part to be measured through the connecting rod 104 .

[0040] A plurality of support components 103 are disposed on the first mounting plate 101 and the second mounting plate 111. The plurality of support components 103 include a cylindrical support seat 1031 and a latch 1032 that penetrates the support seat 1031 and is adjustably disposed. The support seat 1031 is a coaxially disposed step-shaped structure, and each table surface is a conical surface.

[0041] The plurality of support components 103 are fixedly connected to the first mounting plate 101 and the second mounting plate 111 , and are located between the plurality of positioning components.

[0042] In this embodiment, limit screws 12 are arranged between the slide rails 6 , and the number of the limit screws 12 is two.

[0043] All the above-mentioned driving parts (referring to power elements), electrical components and adapted power supplies are connected through wires. The specific connection means should refer to the following working principle. The electrical connection is completed in the order of working in sequence between the electrical components. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0044] To achieve the above object, according to a second aspect of the present invention, a three-coordinate measuring fixture measurement method is also provided, using the three-coordinate measuring fixture as described above, and the three-coordinate measuring fixture measurement method comprises the following steps:

[0045] S1: Before measurement, the part to be measured is clamped on the first positioning mechanism and the second positioning mechanism on the workbench and fixed according to the clamping requirements. The part to be measured is first placed on the support assembly, and the part to be measured is initially supported and fixed by the latch, and then the clamping cylinder drives the chuck to clamp the part to be measured through the connecting rod;

[0046] S2: The adjusting mechanism is adjusted in position through the sliding mechanism, and the spring is compressed by moving the moving assembly downward, thereby driving the connecting block and the pressing block to move downward, pressing the workpiece fixed on the workbench, and completing the quick tightening;

[0047] S3: Turn on the measuring machine, call the measuring program set in the measuring machine, and execute the measuring action until the measurement of the first type of parts to be measured is completed;

[0048] S4: Then follow the above steps and quickly switch to continue measuring other parts to be tested.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-coordinate measuring fixture, characterized in that: The invention comprises a base, a workbench, a frame body, a measuring machine, a sliding mechanism, an adjusting mechanism, a positioning mechanism and a pressing mechanism. The workbench is arranged on the base. The adjusting mechanism is slidably connected to the frame body through a sliding mechanism. The adjusting mechanism comprises an adjusting cylinder, a ball screw, a moving assembly, a spring and a support frame. The ball screw is fixedly connected to the support frame. The moving assembly comprises a moving housing, a first gear, a second gear and a driving motor. A power input shaft is rotatably installed on the moving housing. One end of the power input shaft extends out of the moving housing and is connected to the driving motor. The other end of the power input shaft is fixedly connected to the first gear. The second gear is meshed with the first gear. A gear rotatably installed in the moving housing The ball screw nut matched with the second gear, and the ball screw matched with the ball screw nut can be rotatably installed in the movable housing, the spring is located at the lower part of the movable component and is sleeved on the outside of the ball screw, the lower end of the spring is connected to the clamping mechanism, the positioning mechanism includes a first positioning mechanism and a second positioning mechanism arranged relatively, the first positioning mechanism includes a first mounting plate and a positioning assembly, the second positioning mechanism includes a second mounting plate and a positioning assembly, the positioning assembly includes a clamping cylinder, a chuck, and a connecting rod, the clamping cylinder is connected to the chuck through a connecting rod, and a number of support assemblies are arranged on the first mounting plate and the second mounting plate, and the number of support assemblies include a cylindrical support seat and a pin that penetrates the support seat and is adjustably arranged.

2. A three-coordinate measuring fixture according to claim 1, characterized in that: The frame body comprises two fixing blocks connected with the base, fixing rods arranged at both sides of the fixing blocks and fixing seats arranged at the tops of the fixing rods, and the fixing seats are fixedly connected with the fixing rods.

3. A three-coordinate measuring fixture according to claim 1, characterized in that: The sliding mechanism comprises a sliding rail and a sliding block, wherein the sliding rail is fixedly arranged on a fixing seat, and the sliding block is arranged on a side of the adjusting mechanism close to the frame body, and the sliding block is slidably connected to the sliding rail.

4. The three-coordinate measuring fixture according to claim 1, characterized in that: The clamping mechanism comprises a clamping block and a connecting block, wherein the connecting block is fixedly connected to the bottom end of the spring, and the clamping block is fixedly connected to the connecting block.

5. The three-coordinate measuring fixture according to claim 1, characterized in that: The first mounting plate is L-shaped and fixedly connected to the workbench.

6. The three-coordinate measuring fixture according to claim 1, characterized in that: The second mounting plate includes a long side and a short side. The short side is arranged parallel to the workbench and fixed on the upper surface of the workbench. The long side forms an angle with the workbench.

7. The three-coordinate measuring fixture according to claim 1, characterized in that: The plurality of support components are fixedly connected to the first mounting plate and the second mounting plate, and are located between the plurality of positioning components.

8. The three-coordinate measuring fixture according to claim 3, characterized in that: Limit screws are arranged between the slide rails, and the number of the limit screws is two.

9. A three-coordinate measuring fixture measurement method, characterized in that: Using the three-coordinate measuring fixture as described in any one of claims 1 to 8, the three-coordinate measuring fixture measurement method comprises the following steps: S1: Before measurement, the part to be measured is clamped on the first positioning mechanism and the second positioning mechanism on the workbench and fixed according to the clamping requirements. The part to be measured is first placed on the support assembly, and the part to be measured is initially supported and fixed by the latch, and then the clamping cylinder drives the chuck to clamp the part to be measured through the connecting rod; S2: The adjusting mechanism is adjusted in position through the sliding mechanism, and the spring is compressed by moving the assembly downward, thereby driving the connecting block and the pressing block to move downward, pressing the part to be tested fixed on the workbench, and completing the fast tightening; S3: Turn on the measuring machine, call the measuring program set in the measuring machine, and execute the measuring action until the measurement of the first type of parts to be measured is completed; S4: Then follow the above steps and quickly switch to continue measuring other parts to be tested.

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