A gauge for measuring the position of a suspended point and its manufacturing method

Abstract

This invention discloses a gauge for measuring the position of a suspended point and its processing method, which has a high pass rate and a short production cycle. The gauge for measuring the position of a suspended point includes a gauge base (1), a first positioning baffle (2), a second positioning baffle (3), a first gauge guide tube (4), a second gauge guide tube (5), screws (6), and pins (7). The gauge base (1) is inverted L-shaped. The first positioning baffle (2) and the second positioning baffle (3) are rectangular plates. The first positioning baffle (2) and the second positioning baffle (3) are symmetrically arranged on both sides of the gauge base (1) and correspond to the lower part of the vertical section of the gauge base (1). The rear ends of the first positioning baffle (2) and the second positioning baffle (3) are fixedly connected to the gauge base (1) by screws (6) and pins (7).

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining, in particular to a suspended point size position gauge and a machining method thereof. BACKGROUND

[0002] In the conventional processing method of the size position of the overhanging point gauge, the base 1 is made of 45 steel, and is quenched and tempered (28-32) HRC; the first and second positioning plates 2 and 3 are made of No. 10 steel, and are carburized to a depth of 1-1.2 mm, and quenched (58-65) HRC; the first and second gauge guide cylinders 4 and 5 are made of T10A steel, and quenched (58-65) HRC. The following process is used for the base 1: blanking → milling hex → milling measuring surfaces A and a → boring a hole φ1 mm (note: the hole (φA+3) H8 is processed by slow wire cutting as a finished product) → semi-finished product inspection → pricking and removing burrs → heat treatment and quenching and tempering (28-32) HRC → parallel grinding of hex, parallelism 0.01 mm, perpendicularity of measuring surfaces A and a ±2', smoothness Ra 0.4 um, L6+0.010 size (L6+0.005) 0-0.005 → slow wire cutting hole (φA+3) H8, ensuring that the hole axis and the base form an angle α, the first gauge guide cylinder 4 and the second gauge guide cylinder 5 are horizontally offset by a distance L5±0.01, and the first gauge guide cylinder 4 is on the left and the second gauge guide cylinder 5 is on the right, and along the height direction, a hole distance L3±0.01, L4±0.01 is formed → pricking and pressing the measuring surface, ensuring parallelism and perpendicularity, and using a sine gauge to detect the angle α, ensuring the angle α → pricking and assembling → lettering → finished product inspection. The following process is used for the first and second positioning plates 2 and 3: blanking → milling hex → milling arc → pricking and removing burrs, drilling screw holes 6 and pin holes 7 on the front surface of the first positioning plate 2 → heat treatment, carburizing to a depth of 1-1.2 mm, and quenching (58-65) HRC → parallel grinding of measuring surfaces C and D, smoothness Ra 0.2 um. The following process is used for the first and second gauge guide cylinders 4 and 5: blanking → turning, hole φA+0.0080 is reduced by 0.5 mm to leave a pressing allowance, and the outer circle (φA+3) H8 is increased by 0.5 mm to leave a grinding allowance → pricking and removing burrs → heat treatment and quenching (58-65) HRC → pressing hole φA+0.0080, smoothness Ra 0.2 um → grinding the outer circle, grinding (φA+3) H8, smoothness Ra 0.2 um. After the base 1, the first and second positioning plates 2 and 3, the first and second gauge guide cylinders 4 and 5 are separately processed and qualified, the first and second gauge guide cylinders 4 and 5 are assembled on the base 1, the angle α between the base and the first and second gauge guide cylinders 4 and 5 is ensured by using a sine gauge, and the hole distance sizes L3±0.01, L4±0.01, L5±0.01 are ensured. Then, the pricker uses gauge rod one and gauge rod two to measure the distance size LA' value, the outer circle size of gauge rod one is (φA+0.004) 0-0.004, and the size of gauge rod two can be freely selected according to the actual situation, and the technical personnel calculate the assembly sizes LB' and LC under the premise of ensuring the overhanging point a coordinate positions L1±0.01 and L2±0.01.Next, the fitter uses a special positioning fixture to fix the base 1, the first positioning baffle 2, and the second positioning baffle 3 into one piece. By moving the first positioning baffle 2 up and down and the second positioning baffle 3 left and right, the distance between the measuring surface A and the measuring surface E is ensured to be LC. The first positioning baffle 2 and the second positioning baffle 3 are in the same position. Figure 1 (a) The distance between the upper surface of the main view and the measuring surface a is LB'. Next, the fitter, using the screw holes 6 and pin holes 7 on the first positioning plate 2 as guides, drills screw holes 6 and pin holes 7 on the base 1 and the second positioning plate 3, ensuring that the screw holes and pin holes are drilled through. Finally, the fitter checks the distance dimension LA', fine-tunes the first positioning plate 2 and the second positioning plate 3, and after ensuring the assembly dimensions LB' and LC, uses a gluing process to fasten and position the screws and pins, thereby indirectly ensuring the coordinate positions of the suspended point a: L1±0.01 and L2±0.01. Due to factors such as the cumulative error of the measuring surface conversion, the actual value measurement error, the clamping error, and the inconsistent force between the gauge block LB' and the measuring surface a of the base and the upper surface of the positioning plate, the gauge processed using the above process has the following defects:

[0003] 1. After the product is finished, the actual difference between the coordinate positions of the suspended point a, L1±0.01 and L2±0.01, is about 0.01mm.

[0004] 2. The assembly dimension LB', the gauge block LB', the base measuring surface a and the upper surface of the positioning baffle are not subjected to the same force, forming a "seesaw" phenomenon. The assembly error is generally around 0.01mm.

[0005] 3. During periodic calibration, the same method as during assembly is used. Using gauges 1 and 2, LA' is measured first, and then LB' and LC are calculated to indirectly verify whether the coordinate positions of the suspended point a, L1±0.01 and L2±0.01, are qualified. The coordinate position of the suspended point a cannot be directly measured.

[0006] 4. Low pass rate and long production cycle. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a gauge for measuring the size and position of suspended points and its processing method, which has a high pass rate and a short production cycle.

[0008] The objective of this invention is achieved as follows:

[0009] A gauge for measuring the position of a suspended point includes a gauge base (1), a first positioning baffle (2), a second positioning baffle (3), a first gauge guide tube (4), a second gauge guide tube (5), screws (6), and pins (7). The gauge base (1) is inverted L-shaped. The first positioning baffle (2) and the second positioning baffle (3) are rectangular plates. The first positioning baffle (2) and the second positioning baffle (3) are symmetrically arranged on both sides of the gauge base (1) and correspond to the lower part of the vertical section of the gauge base (1). The rear ends of the first positioning baffle (2) and the second positioning baffle (3) are fixedly connected to the gauge base (1) by screws (6) and pins (7). An opening is formed between the front ends of the first positioning baffle (2) and the second positioning baffle (3). The width of the opening is... The degree is L6, the opening is used to fit and position with the product, the front end face of the vertical section of the gauge base (1) is the gauge measuring surface A, the front part of the horizontal section of the gauge base (1) is provided with two guide tube holes along the front and lower, the two guide tube holes are parallel to each other, the two guide tube holes form an angle α with the vertical surface of the gauge base (1), the angle α corresponds to the tilt angle of the hole to be tested of the product, the first gauge guide tube (4) and the second gauge guide tube (5) are fixed in the two guide tube holes, the axis of the first gauge guide tube (4) and the positioning baffle on the corresponding side form a distance L3, along the transverse direction of the gauge base (1), the distance between the axis of the first gauge guide tube (4) and the second gauge guide tube (5) is L4, along the longitudinal direction of the gauge base (1), the distance between the axis of the first gauge guide tube (4) and the second gauge guide tube (5) is L5;

[0010] The extension line of the axis of the first gauge guide tube (4) generates a suspended point a between the first positioning baffle (2) and the second positioning baffle (3). The distance between the suspended point a and the measuring surface A of the gauge base (1) is L1, and the distance between the suspended point a and the upper surface of the first positioning baffle (2) / second positioning baffle (3) is L2.

[0011] A gauge for measuring the position of a suspended point includes a gauge base (21), a first gauge guide tube (22), and a second gauge guide tube (23). The position of the first gauge guide tube (22) corresponds to the position of the first gauge guide tube (4), and the position of the second gauge guide tube (23) corresponds to the position of the second gauge guide tube (5). The dimensional and positional accuracy of the first gauge guide tube (22) and the second gauge guide tube (23) is higher than that of the first gauge guide tube (4) and the second gauge guide tube (5). The suspended point a generated by the gauge is located on the first gauge guide tube. On the axis of the cylinder (22), the coordinate dimension accuracy of the suspended point a generated by the fixture is higher than that of the gauge. The dimensions of the two sides of the fixture base (21) correspond to the opening dimensions of the gauge opening. The upper ends of the fixture base (21) are provided with auxiliary measuring plates (24). The upper and lower surfaces of the auxiliary measuring plates (24) are parallel. The lower surface of the auxiliary measuring plates (24) is the fixture reference A. The fixture reference A corresponds to the upper surface of the first positioning plate (2) / the second positioning plate (3). The rear end face of the fixture base (21) is the fixture measuring surface A. The fixture measuring surface A corresponds to the gauge measuring surface A.

[0012] A method for manufacturing a gauge for measuring the position of a suspended point includes the following steps:

[0013] S1. Separately processed gauge base (1), first positioning baffle (2), second positioning baffle (3), first gauge guide cylinder (4), second gauge guide cylinder (5);

[0014] S2, Assembly fixtures, gauges

[0015] First, place the first gauge guide tube (4) and the second gauge guide tube (5) into the guide tube hole and fix them. Then, place the first positioning baffle (2) and the second positioning baffle (3) on both sides of the base (1). Next, place the gauge between the first positioning baffle (2) and the second positioning baffle (3) of the gauge. Use two measuring rods (when using the gauge, measuring rods are also used to confirm whether the product is qualified) to pass through the first gauge guide tube (4) and the second gauge guide tube (5) of the gauge and the first gauge guide tube (22) and the second gauge guide tube (23) of the gauge to form a clearance fit, connect the gauge and the gauge, and ensure that the gauge and the gauge hole are concentric. At the same time, put two gauge blocks with a thickness value of E between the two auxiliary measuring plates and the positioning baffles respectively. The upper end of the gauge block is in contact with the gauge reference A, and the lower end of the gauge block is in contact with the upper end of the first positioning baffle (2) / second positioning baffle (3) to ensure the gap between the gauge and the gauge. The value is E. The distance between the gauge reference A and the suspended point a is L2′. The distance between the upper surface of the positioning baffle and the suspended point a is L2. Theoretically, the value of E is equal to L2′-L2. If E>L2′-L2, the first positioning baffle (2) and the second positioning baffle (3) of the gauge are moved upward at the same time. If E<L2′-L2, the first positioning baffle (2) and the second positioning baffle (3) of the gauge are moved downward at the same time. At the same time, it is ensured that the measuring surface A of the gauge and the measuring surface A of the gauge base (1) are in contact with each other at more than 85%. Finally, with the gauge components and the gauge fixed, the screw holes and pin holes on the first positioning baffle (2) are used as guides. Screw holes and pin holes are drilled on the base (1) and the second positioning baffle (3). Then, screws (6) and pins (7) are used to fasten and position the gauge base, positioning baffle, and guide tube, thereby indirectly ensuring the accuracy and position of the coordinate dimension of the suspended point a of the gauge, the hole distance dimension of the guide tube, and the position.

[0016] Preferably, the machining method of the guide tube hole on the base (1) is as follows: the side of the gauge base (1) is the measuring surface B, the front end of the flat section of the gauge base (1) is the measuring surface E, and the lower surface of the flat section of the gauge base (1) is the measuring surface a. The measuring surfaces B and E are used as the reference for the wire cutting of the slow wire. The position of the suspended point a projected onto the measuring surface a along the axis of the first gauge guide tube (4) and the second gauge guide tube (5) is found. Two guide tube holes are cut to ensure the coordinate positions of the suspended point a L1 and L2 and the hole spacing dimensions L3, L4 and L5.

[0017] Preferably, before assembling the fixture and gauge, the corresponding measured values ​​LA and LB between the fixture guide tube and the fixture base are first detected using gauge rod one and gauge rod two. LA is the distance between the bottom surface of the fixture and the fixture reference A, and LB is the distance between the front vertex of the outer circle generatrix of gauge rod two and the measuring surface A of the fixture. L2′=LA-{LB-φ gauge rod two÷2-φ gauge rod two÷2÷tan[(90°-α)÷2] -L1-φ gauge rod one÷2÷cosα}÷tanα. Then the assembly clearance E=L2′-L2 is calculated. Finally, the calculated value E is engraved on the fixture. When used again, the data is directly used for gauge assembly.

[0018] Preferably, the LA value is measured using a combination of gauge blocks and a ruler.

[0019] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0020] The method of this invention can significantly reduce the processing difficulty of suspended point size and position gauges, increase production efficiency by more than 3 times, ensure the consistency and stability of the quality of the measured parts, unify the measurement methods of this type of gauge with the quality inspection department, and is suitable for the manufacturing and inspection of single-piece and small-batch suspended point size and position gauges with similar structures. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the gauge of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the inspection fixture of the present invention;

[0023] Figure 3 This is a schematic diagram of the assembly of gauges and inspection tools during the processing of this invention. Detailed Implementation

[0024] A gauge for measuring the position of suspended points and its manufacturing method, the method mainly targeting, for example, Figure 1The gauge for measuring the position of the suspended point shown is used to assemble the first positioning baffle 2, the second positioning baffle 3, the first gauge guide tube 4, and the second gauge guide tube 5 onto the base 1 via screws 6 and pins 7. The first positioning baffle 2 and the second positioning baffle 3 form an opening L6+0.010. The first gauge guide tube 4 and the second gauge guide tube 5 form an angle α with the base 1, generating hole spacing dimensions L3±0.01, L4±0.01, and L5±0.01 on the base 1. These hole spacing dimensions, along with the first positioning baffle 2 and the second positioning baffle 3, generate a suspended point a. The coordinate positions of the suspended point a are L1±0.01 and L2±0.01. When machining guide cylinder holes 4 and 5 on base 1 using slow wire EDM, the measuring surfaces B and E are used as the wire cutting reference. The position of the suspended point a projected onto measuring surface a along the axis of the first gauge guide cylinder 4 and the second gauge guide cylinder 5 is accurately located. Hole (φA+3)H8 is cut, ensuring the coordinate positions of the suspended point a are L1±0.01 and L2±0.01, and the hole spacing dimensions are L3±0.01, L4±0.01, and L5±0.01. Finally, the... Figure 2 The precision simplified gauge shown uses screws 6 and pins 7 to fasten and position the base 1 to the first positioning baffle 2 and the second positioning baffle 3, thereby indirectly ensuring the coordinate positions of the suspended point a are L1±0.01 and L2±0.01. This invention significantly reduces the machining difficulty of the suspended point dimension position gauge, increases production efficiency by more than three times, ensures the consistency and stability of the measured part's quality, unifies the measurement methods with those of quality inspection departments, and is suitable for the manufacturing and inspection of single-piece and small-batch suspended point dimension position gauges with similar structures.

[0025] Figure 1 The diagram shows a gauge, where (a) is the front view and (b) is the rotational view along direction A. This type of gauge consists of seven parts: base 1, first positioning baffle 2, second positioning baffle 3, first gauge guide tube 4, second gauge guide tube 5, screw 6, and pin 7. The first positioning baffle 2, second positioning baffle 3, first gauge guide tube 4, and second gauge guide tube 5 are combined with the base 1 to form a whole by screw 6 and pin 7. The first positioning baffle 2 and the second positioning baffle 3 are fitted on the front and rear end faces of the base 1 to form an opening L6+0.010. The first gauge guide cylinder 4 and the second gauge guide cylinder 5 are fitted on the base 1, forming an angle α with the base 1. The first gauge guide cylinder 4 is adjacent to the baffle 2 and is offset from the second gauge guide cylinder 5 by a hole distance of L5±0.01 in the horizontal direction. The first gauge guide cylinder 4 is on the left and the second gauge guide cylinder 5 is on the right, forming hole distances of L3±0.01 and L4±0.01 in the height direction. The axis of the first gauge guide cylinder 4 extends to form a suspended point a with the first positioning baffle 2 and the second positioning baffle 3. The coordinate positions of the suspended point a are L1±0.01 and L2±0.01.

[0026] When using a gauge to inspect a product, place the product between the first positioning baffle 2 and the second positioning baffle 3, with the upper surface of the product parallel to the measuring surfaces C and D of the first and second positioning baffles 2 and 3, respectively. Then, insert two cylindrical pins into the first gauge guide tube 4 and the second gauge guide tube 5 to connect the gauge to the product. This is used to check the size 'a' of the suspended point inside the product hole. When the size 'a' of the suspended point is qualified, both cylindrical pins can be inserted into the corresponding hole of the product. Note: ① The gauge can be directly machined into a straight hole of 2×φA+0.0080. Modifying it into a structure with inlaid guide tubes 4 and 5 is to allow for repair by directly replacing guide tubes 4 and 5 after the gauge is periodically calibrated and scrapped, thus improving the gauge repair efficiency and gauge life. ② The structure of the product, the positioning of the gauge, and the inspection structure are the same, only the product accuracy requirement is not as high as that of the gauge.

[0027] Figure 2This is a schematic diagram of a precision inspection fixture, where (a) is the front view, (b) is the top view, and (c) is the rotational view along direction A. The fixture consists of three parts: a base 1, a first inspection fixture guide tube 22, and a second inspection fixture guide tube 23. The α° angle value is consistent with the gauge angle value, with tolerance controlled within ±1′, twice as accurate as the gauge. The hole size accuracy, the coordinate dimension of the suspended point a, and the hole spacing dimension of the guide tube are twice as accurate as the gauge. The coordinate dimensions of the suspended point a, L1±0.005 and L2′±0.005, correspond to the gauge L1±0.01 and L2±0.01. The hole spacing dimensions L3±0.005, L4±0.005, and L5±0.005 correspond to the gauge L3±0.01, L4±0.01, and L5±0.01. The boss dimension (L6+0.005)0-0.005 corresponds to the gauge opening dimension L6+0.005. The .010 corresponds to the measuring surface C of the gauge's second positioning baffle 3, and the measuring surface D corresponds to the measuring surface D of the gauge's first positioning baffle 2. The guide cylinder hole (φA+4)+0.0040 corresponds to the gauge hole φA+0.0080 (Note: the gauge hole is 4mm larger than the gauge hole to reduce the deformation of the gauge rod used in assembly and reduce the difficulty of machining the gauge rod). That is, the dimensional accuracy of the gauge is nearly twice that of the corresponding dimension of the gauge. The gauge base 21 is made of high-speed steel with a hardness ≥58HRC. The process uses Beijing AgieCharmilles CA30 slow wire EDM to ensure the hole spacing and corresponding positional relationship, with a surface finish Ra0.2um. The guide cylinder's inner hole (φA+4)+0.0040 is ground with a grinding machine to a surface finish Ra0.2um, and the outer circle of the guide cylinder is ground with MGBA1420A to a surface finish Ra0.2um. After the base and guide tube are machined to quality, they are assembled by a fitter. After assembly, gauge rod one and gauge rod two are used to measure the corresponding actual values ​​LA and LB. The outer diameter of gauge rod one is (φA+0.002)0-0.002, and the size of gauge rod two can be freely selected based on actual conditions. Then, technicians calculate the assembly clearance E value based on the measured values. Finally, the calculated value E is engraved on the gauge for direct use in gauge assembly during subsequent applications, reducing auxiliary time such as fitter measurement of actual values ​​and technician conversion. Theoretically, the value E is equal to (L2′-L2). It is recommended that the value E not be written directly on the measuring surface or reference surface to avoid affecting manufacturing and inspection accuracy.

[0028] After the gauge base 1, first positioning baffle 2, second positioning baffle 3, first gauge guide cylinder 4, and second gauge guide cylinder 5 are individually processed and qualified according to the above traditional method, they are then processed according to... Figure 3 The diagram shows the assembly of the gauge and the measuring tool. Figure (a) is the assembly diagram, and Figure (b) is the assembly measuring bar diagram. During assembly, first place the first measuring gauge guide tube 4 and the second measuring gauge guide tube 5 into the hole (φA+3)H8 of the measuring gauge base 1, and then press the first positioning baffle 2 and the second positioning baffle 3... Figure 1(a) The structure shown in the figure is placed at the front and rear ends of the base 1. Then, the gauge is placed between the first positioning baffle 2 and the second positioning baffle 3 of the gauge. Two gauge bars as shown in Figure (b) are used to pass through the first gauge guide tube 4, the second gauge guide tube 5 of the gauge and the first gauge guide tube 22 and the second gauge guide tube 23 of the gauge to connect the gauge and the gauge. Ensure that the gauge and gauge holes are concentric. Note that the outer circle of the gauge bar (φA+4+0.002)0-0.002 is in contact with the gauge guide tube hole (φA+4)+0.0040, and the outer circle (φA+0.004)0-0.004 is in contact with the gauge guide tube hole φA+0.0080. Simultaneously, two gauge blocks with a thickness of E are placed in the position shown in Figure (a). The upper surface of the gauge block is in contact with the gauge reference A, and the lower surface of the gauge block is in contact with the upper surface of the first positioning baffle 2 and the second positioning baffle 3 of the gauge, ensuring that the gap between the gauge and the gauge is E ± 0.005, and the upper surfaces of the first positioning baffle 2 and the second positioning baffle 3 are flush. Theoretically, the value of E is equal to (L2′-L2). If E > (L2′-L2), then the first positioning baffle 2 and the second positioning baffle 3 of the gauge are moved upwards simultaneously. If E < (L2′-L2), then the first positioning baffle 2 and the second positioning baffle 3 of the gauge are moved downwards simultaneously, while ensuring that the contact degree between the measuring surface A of the gauge and the measuring surface A of the gauge base 1 is more than 85%. Finally, with all components of the gauge and the inspection tool fixed, screw and pin holes are drilled on the base 1 and the second positioning plate 3, guided by the screw holes and pin holes on the first positioning plate 2. Then, screws 6 and pins 7 are used for gluing to fasten and position the gauge base, positioning plate, and guide tube. This indirectly ensures the accuracy and position of the coordinate dimension of the gauge suspension point a, the guide tube hole distance dimension, and the positional accuracy.

[0029] The following are the precautions for machining the gauge for the position of the suspended point: ① The first gauge guide tube 4 is adjacent to the baffle 2, and its hole distance from the second gauge guide tube 5 is offset by L5±0.01 in the horizontal direction, with the first gauge guide tube 4 on the left and the second gauge guide tube 5 on the right. ② For semi-finished products, only drill screw and pin holes on the first positioning baffle 2. When assembling the finished product, after adjusting the position of each part of the gauge and the fixture, drill screw and pin holes on the base and the second positioning baffle 3, using the screw and pin holes on the positioning baffle as guides. At the same time, the screw and pin holes must be drilled through to avoid creating a false impression of tightening and positioning. ③ During assembly, apply red lead powder to the measuring surface A of the fixture. After assembly and adjustment, observe the uniformity of the red lead powder on the measuring surface A of the gauge base to ensure that the adhesion between the two surfaces reaches more than 85%. ④ The wall thickness of the guide tube of the inspection tool is generally ≥1.5mm to avoid deformation during processing and use. At the same time, the clearance between the outer circle of the guide tube and the gauge hole is controlled within 0.05mm to avoid excessive clearance causing a false impression of adhesion and the guide tube falling off during use. ⑤ Precision inspection tools used for assembling or inspecting gauges for the size and position of suspended points should, in principle, have an accuracy class one level higher than that of the gauge.

[0030] The method of this invention can significantly reduce the processing difficulty of suspended point size and position gauges, increase production efficiency by more than 3 times, ensure the consistency and stability of the quality of the measured parts, unify the measurement methods of this type of gauge with the quality inspection department, and is suitable for the manufacturing and inspection of single-piece and small-batch suspended point size and position gauges with similar structures.

[0031] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. An overhanging dot size position gauge, characterized by: The utility model discloses a gauge base (1), first locating baffle (2), second locating baffle (3), first gauge guide cylinder (4), second gauge guide cylinder (5), screw (6), pin (7), the gauge base (1) is inverted L shape, first locating baffle (2), second locating baffle (3) are rectangular plate, first locating baffle (2), second locating baffle (3) are symmetrically arranged in the both sides of gauge base (1), and correspond to the lower part of vertical section of gauge base (1), and the rear end of first locating baffle (2), second locating baffle (3) is fixedly connected with gauge base (1) through screw (6), pin (7), and the front end of first locating baffle (2), second locating baffle (3) generates open gap between, and the width of open gap is L6, and open gap is used to be located with product adhesion, and the front end surface of vertical section of gauge base (1) is gauge measurement surface A, and the front part of the horizontal section of gauge base (1) is inclinedly provided with two guide cylinder holes along the front lower side, and two guide cylinder holes are parallel with each other, and two guide cylinder holes form angle alpha with the vertical surface of gauge base (1), and angle alpha corresponds the inclined angle of the hole to be detected of product, and two guide cylinder holes are fixed with first gauge guide cylinder (4), second gauge guide cylinder (5), and the axial line of first gauge guide cylinder (4) forms distance L3 between corresponding side locating baffle, along the transverse direction of gauge base (1), and the axial line distance of first gauge guide cylinder (4), second gauge guide cylinder (5) is L4, along the longitudinal direction of gauge base (1), and the axial line distance of first gauge guide cylinder (4), second gauge guide cylinder (5) is L5; The axial line extension line of first gauge guide cylinder (4) generates the suspension point a between first locating baffle (2), second locating baffle (3), and the distance between suspension point a and gauge base (1) measurement surface A is L1, and the distance between suspension point a and the upper surface of first locating baffle (2) / second locating baffle (3) is L2.

2. A gauge for measuring the size of a point of suspension as claimed in claim 1, characterised in that: It includes gauge base (21), first gauge guide cylinder (22), second gauge guide cylinder (23), the position of first gauge guide cylinder (22) corresponds to the position of first gauge guide cylinder (4), the position of second gauge guide cylinder (23) corresponds to the position of second gauge guide cylinder (5), the size value precision and position precision of first gauge guide cylinder (22), second gauge guide cylinder (23) are higher than the size value precision and position precision of first gauge guide cylinder (4), second gauge guide cylinder (5), and the suspension point a generated by gauge is located on the axis of first gauge guide cylinder (22), and the coordinate size precision of the suspension point a generated by gauge is higher than that of gauge, the size of the two side faces of gauge base (21) corresponds to the size of gauge gap opening, the upper end of gauge base (21) is provided with auxiliary measuring plate (24) on both sides, the upper surface and the lower surface of auxiliary measuring plate (24) are parallel, the lower surface of auxiliary measuring plate (24) is gauge reference A, the upper surface of first locating baffle (2) / second locating baffle (3) corresponds, and the rear end surface of gauge base (21) is gauge measurement surface A, and gauge measurement surface A corresponds gauge measurement surface A.

3. A method of making the floating point size position gauge of claim 1, wherein, It includes the following steps: S1, machining gauge base (1), first positioning baffle (2), second positioning baffle (3), first gauge guide cylinder (4), second gauge guide cylinder (5) separately; S2, assembling gauge and gauge First, place the first gauge guide cylinder (4) and the second gauge guide cylinder (5) in the guide cylinder hole and fix them, then place the first positioning baffle (2) and the second positioning baffle (3) on both sides of the base (1), then place the gauge between the first positioning baffle (2) and the second positioning baffle (3) of the gauge, and use two gauge rods to pass through the first gauge guide cylinder (4) and the second gauge guide cylinder (5) of the gauge and the first gauge guide cylinder (22) and the second gauge guide cylinder (23) of the gauge, forming a clearance fit, connecting the gauge and the gauge, ensuring that the gauge and the gauge hole are concentric, and at the same time, two gauge blocks with a thickness value of E are placed between the two auxiliary measuring plates and the positioning baffle, the upper end surface of the gauge block is attached to the gauge reference A, and the lower end of the gauge block is attached to the upper end surface of the first positioning baffle (2) / second positioning baffle (3), ensuring that the gap between the gauge and the gauge is E, the distance between the gauge reference A and the hanging point a is L2', and the distance between the upper surface of the positioning baffle and the hanging point a is L2. In theory, the value of E is equal to L2'-L2. If E>L2'-L2, move the first positioning baffle (2) and the second positioning baffle (3) of the gauge upwards at the same time. If E<L2'-L2, move the first positioning baffle (2) and the second positioning baffle (3) of the gauge downwards at the same time, while ensuring that the attachment degree of the gauge measuring surface A and the gauge base (1) measuring surface A is more than 85%, and finally, under the condition that the gauge parts and the gauge are fixed, the screw hole and the pin hole are drilled on the base (1) and the second positioning baffle (3) guided by the screw hole and the pin hole on the first positioning baffle (2), and the gauge base, the positioning baffle and the guide cylinder are fastened and positioned by the screw (6) and the pin (7), which indirectly ensures the coordinate size of the gauge hanging point a, the size accuracy and position of the guide cylinder hole.

4. The method of claim 3, wherein the method further comprises: The machining method of the guide cylinder hole on the base (1) is as follows: the side surface of the gauge base (1) is the measuring surface B, the front end surface of the flat section of the gauge base (1) is the measuring surface E, and the lower surface of the flat section of the gauge base (1) is the measuring surface a. Take the measuring surfaces B and E as the slow wire cutting collision reference, find the position of the hanging point a projected on the measuring surface a along the axis of the first gauge guide cylinder (4) and the second gauge guide cylinder (5), and cut two guide cylinder holes to ensure the coordinate positions L1 and L2 of the hanging point a and the hole distance sizes L3, L4 and L5.

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