Guiding and resetting device and resetting method for multi-station mobile tooling

Abstract

The present invention discloses a guidance and reset device and reset method for a multi-station mobile tooling. The reset device includes a primary guidance mechanism, a secondary guidance mechanism, a tertiary guidance mechanism, and a limiting mechanism. The key geometric parameters of each level of guidance mechanism can be accurately obtained through the algorithms of Equations 1 to 4. The primary guidance mechanism preliminarily determines the approximate reset position of the mobile tooling at the station, the secondary guidance mechanism further determines the relatively precise reset position of the mobile tooling at the station, the tertiary guidance mechanism further determines the precise reset position of the mobile tooling at the station, and the limiting mechanism ultimately determines the precise limit position of the mobile tooling at the station. The multi-stage guidance and reset device and reset method can achieve precise reset of the mobile tooling from a deviation of 100 mm to 0.1 mm.

Description

Technical Field

[0001] The present invention relates to the field of aircraft assembly, and in particular to a multi-stage approach guidance resetting device and a resetting method for a multi-station mobile tooling. Background Art

[0002] For assembly scenarios with a single tool and a single station, the tool is in a fixed state, and there are no issues with tool movement and repeated positioning. For assembly scenarios with multiple tooling and multiple stations, the tool must meet precise repeated positioning requirements when moving from the previous station to the next station or returning to the original station. The repeated positioning accuracy is generally around 0.1mm. For the movement and resetting of lightweight tooling at multiple stations, a single-stage tapered positioning pin (taper pin) is generally used to guide the resetting. Depending on its diameter and taper, the taper pin can achieve a guided resetting with a deviation from 10mm to 0.1mm. Due to the light weight and small inertia of the tooling, the tooling can generally be controlled within a deviation range of 10mm during movement and resetting. Therefore, single-stage guidance can meet the requirements. At the same time, due to the small inertia of the lightweight tooling, the force acting on the taper pin during the tooling resetting process is also relatively small. The taper pin generally does not undergo plastic deformation or fracture and other failure conditions. Therefore, the requirements for the taper pin diameter are also relatively low, and the taper pin diameter can generally be selected based on experience.

[0003] However, for large-mass tooling exceeding 100 tons, the braking distance is large and difficult to control within the range of 10 mm. Therefore, the single-stage guided reset based on the taper pin cannot meet the requirements. At the same time, the large-mass tooling exerts a large force on the taper pin during the reset process. In order to prevent failures such as plastic deformation or fracture, an accurate algorithm is needed to determine the minimum diameter of the taper pin.

[0004] Therefore, in order to solve the problem of efficient and safe reset of multi-station large-mass tooling, a guided reset device and reset method for multi-station mobile tooling were designed. Summary of the Invention

[0005] In order to solve the problem of efficient and safe resetting of multi-station large-mass tooling, the present application provides a guided resetting device and a resetting method for multi-station mobile tooling, which realizes impact-free and high-efficiency precise resetting of large-mass mobile tooling at multiple stations.

[0006] An embodiment of the present application provides a guiding and resetting device for a multi-station mobile tool, comprising:

[0007] The first-level guiding mechanism includes a laser receiver and a color ribbon. The laser receiver is arranged at the end of the bottom of each mobile tooling. The reflection spectrum of the color ribbon is consistent with the spectrum of the laser receiver and is arranged at the specified position of each station; the second-level guiding mechanism includes a second-level positioning pin and a second-level positioning hole bushing. The second-level positioning pin is arranged on the bottom surface of each mobile tooling. The second-level positioning hole bushing is arranged on the ground of each station and cooperates with the second-level positioning pin hole pin; the third-level guiding mechanism includes a third-level positioning pin and a third-level positioning hole bushing. The third-level positioning pin is arranged on the bottom surface of each mobile tooling. The third-level positioning hole bushing is arranged on the ground of each station , cooperate with the three-level positioning pin hole pin; the limiting mechanism includes a limiting pin and a limiting hole bushing, the limiting pin is arranged on the bottom surface of each mobile tooling, and the limiting hole bushing is arranged on the ground of each station, and cooperates with the limiting pin hole pin; the laser generating receiver, the secondary positioning pin, the three-level positioning pin, and the limiting pin are sequentially arranged on the intersection line of the symmetry plane and the bottom surface of each mobile tooling; the ribbon, the secondary positioning hole bushing, the three-level positioning hole bushing, and the limiting hole bushing are sequentially arranged on each station, and their positions correspond to the positions of the laser generating receiver, the secondary positioning pin, the three-level positioning pin, and the limiting pin on the mobile tooling;

[0008] The outer diameter d3 of the three-stage positioning pin satisfies formula 1:

[0009]

[0010] Wherein, m is the mass of the mobile tooling, μ is the kinetic friction coefficient between the mobile tooling and the ground, σ s is the yield strength of the three-stage positioning pin, n is the safety factor, g is the acceleration of gravity, Δl is the distance that the three-stage positioning pin approaches the reset direction in the tooling movement direction during the reset process, α 精 The taper of the chamfer of the three-stage positioning pin, L is the length of the three-stage positioning pin extending from the bottom of the movable tooling;

[0011] The outer diameter d2 of the secondary positioning pin satisfies Formula 2:

[0012]

[0013] Wherein, D2 is the inner diameter of the bushing of the secondary positioning hole, and D3 is the inner diameter of the bushing of the tertiary positioning hole;

[0014] The width W of the ribbon satisfies Equation 3:

[0015]

[0016] Among them, α 粗 is the taper of the secondary locating pin chamfer, and h is the depth of the secondary locating hole bushing chamfer.

[0017] Specifically, the diameter of the small circle of the chamfered end of the third-level positioning pin is half of the outer diameter d3 of the third-level positioning pin. The inner diameter D3 of the third-level positioning hole bushing and the outer diameter d3 of the third-level positioning pin need to be matched according to the tolerance of H7 / f7, thereby determining the size of the inner diameter D3 of the third-level positioning hole bushing;

[0018] Specifically, the diameter of the small circle of the chamfered end of the secondary positioning pin is half of the outer diameter d2 of the secondary positioning pin. The secondary positioning hole bushing includes a chamfer, and the taper of the chamfer of the secondary positioning hole bushing is consistent with the taper of the chamfer of the secondary positioning pin. The diameter of the large circle of the chamfered end of the secondary positioning hole bushing can be obtained by the inner diameter D2 of the secondary positioning hole bushing, the taper α of the chamfer of the secondary positioning hole bushing, and the 粗 The depth h of the chamfer of the secondary positioning hole bushing is calculated;

[0019] Specifically, the limiting hole bushing is an oblong hole bushing, and the diameter D of the oblong hole bushing cross section is dh and the diameter D of the limiting hole dp According to the tolerance of H7 / f7, the diameter D of the cross section of the oblong hole of the limit hole bushing is dh and length L dh And the diameter D of the stop pin dp The value range of can be calculated by formula 4:

[0020]

[0021] The embodiment of the present application further provides a method for resetting a multi-station mobile tool using the above-mentioned guided reset device, which specifically includes the following steps:

[0022] (a) moving each of the mobile tools close to the station, and when the laser receiver on the mobile tool approaches the ribbon on the station, observing the relative position of the laser receiver to the ribbon, and after the laser receiver emits an audible and visual signal, stopping the mobile tool within the width of the ribbon so that the secondary positioning pin on the mobile tool can be inserted into the secondary positioning hole bushing on the station, thereby completing the initial reset guidance of the mobile tool at the station;

[0023] (b) driving the secondary positioning pin on the mobile tooling to insert into the secondary positioning hole bushing of the station, so that the mobile tooling can make an approximate position adjustment in the moving direction, so that the tertiary positioning pin on the mobile tooling can be inserted into the tertiary positioning hole bushing on the station, completing the approximate reset guidance of the mobile tooling at the station;

[0024] (c) driving the three-stage positioning pin on the mobile tool to insert into the three-stage positioning hole bushing of the station, so that the mobile tool can make further approximate position adjustment in the moving direction, thereby completing the precise reset guidance of the mobile tool at the station;

[0025] (d) driving the limit pin on the movable tooling and inserting it into the limit hole bushing on the station, so that the movable tooling can make a small adjustment in the normal direction of the moving direction, thereby completing the precise limit guidance of the movable tooling at the station.

[0026] Compared with the prior art, the technology of the present invention has at least the following beneficial effects:

[0027] (1) The position of the mobile tooling relative to the station can be visually compared by installing a laser receiver at the bottom of the mobile tooling and the color ribbon on the station. The reset process of the mobile tooling is not restricted by the spatial position of the reset structure, and is visible.

[0028] (2) The multi-stage guiding and resetting device of "secondary positioning pin-tertiary positioning pin-limit pin" can achieve precise guiding and resetting of the mobile tooling from a deviation of at least 100 mm to a deviation of 0.1 mm, which is more than 10 times larger than the existing guiding and resetting range of from a deviation of 10 mm to a deviation of 0.1 mm.

[0029] (3) An algorithm for selecting the values ​​of ribbon width, third-level positioning pin diameter, second-level positioning pin diameter and limit pin diameter is given, which is more reliable than the previous selection based on experience and more efficient than the selection based on finite element calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the station mobile tooling layout provided for this application

[0031] Figure 2 for Figure 1 Middle AA section view

[0032] Figure 3 Schematic diagram of the partial structure of the three-level positioning hole bushing and the three-level positioning pin provided in this application

[0033] Figure 4 Schematic diagram of the partial structure of the secondary positioning hole bushing and secondary positioning pin provided in this application

[0034] Figure 5 Schematic diagram of the partial structure of the limiting hole bushing and limiting pin provided in this application

[0035] Figure 6 Schematic diagram of the secondary positioning pin reset after the laser generating receiver provided in this application stops in the ribbon area

[0036] Figure 7Schematic diagram of the third-level positioning pin reset after the second-level positioning pin reset provided in this application

[0037] Figure 8 Schematic diagram of limit pin reset after three-level positioning pin reset provided in this application

[0038] Explanation of the numbers in the figure: 1 mobile tooling, 2 three-level positioning pin, 3 two-level positioning pin, 4 limit pin, 5 laser receiver, 6 station, 7 three-level positioning hole bushing, 8 two-level positioning hole bushing, 9 limit hole bushing, 10 ribbon DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] The purpose of the present invention is to solve the problem of efficient and safe resetting of multi-station large-mass tooling.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example 1

[0043] like Figure 1-8 As shown, a guiding and resetting device for a multi-station mobile tooling 1 includes a primary guiding mechanism, a secondary guiding mechanism, a tertiary guiding mechanism and a limiting mechanism; through the multi-stage guiding and resetting device, the mobile tooling 1 can be accurately guided and reset from a deviation of at least 100 mm to a deviation of 0.1 mm.

[0044] The first-level guiding mechanism includes a laser receiver 5 and a ribbon 10. The laser receiver 5 is arranged at the end of the bottom of each mobile tooling 1. The reflection spectrum of the ribbon 10 is consistent with the spectrum of the laser receiver 5 and is arranged at a designated position of each station 6. The first-level guiding mechanism can complete the initial reset guidance of the mobile tooling 1 at the station 6, making the reset process visible.

[0045] The secondary guiding mechanism includes a secondary positioning pin 3 and a secondary positioning hole bushing 8. The secondary positioning pin 3 is set on the bottom surface of each mobile tooling 1, and the secondary positioning hole bushing 8 is set on the ground of each station 6, and cooperates with the secondary positioning pin 3 hole pin; the secondary guiding mechanism can complete the approach and reset guidance of the mobile tooling 1 at the station 6.

[0046] The three-level guiding mechanism includes a three-level positioning pin 2 and a three-level positioning hole bushing 7. The three-level positioning pin 2 is set on the bottom surface of each mobile tooling 1, and the three-level positioning hole bushing 7 is set on the ground of each station 6, and cooperates with the three-level positioning pin 2 hole pin; the three-level guiding mechanism can complete the precise reset guidance of the mobile tooling 1 at the station 6.

[0047] The limiting mechanism includes a limiting pin 4 and a limiting hole bushing 9. The limiting pin 4 is set on the bottom surface of each mobile tooling 1, and the limiting hole bushing 9 is set on the ground of each station 6 and cooperates with the limiting pin 4 hole pin; the limiting mechanism can complete the precise limiting guidance of the mobile tooling 1 at the station 6.

[0048] The laser receiver 5, the secondary positioning pin 3, the tertiary positioning pin 2, and the limit pin 4 are sequentially arranged on the intersection line of the symmetry plane and the bottom surface of each mobile tooling 1; ensuring that the mobile tooling 1 does not have an overload during the multi-stage approach reset process, reducing the force on the positioning pin and the limit pin 4.

[0049] The ribbon 10, the secondary positioning hole bushing 8, the tertiary positioning hole bushing 7, and the limit hole bushing 9 are sequentially arranged on each station 6, and their positions correspond to the positions of the laser generating receiver 5, the secondary positioning pin 3, the tertiary positioning pin 2, and the limit pin 4 on the mobile tooling 1.

[0050] The outer diameter d3 of the three-stage positioning pin 2 satisfies formula 1:

[0051]

[0052] Wherein, m is the mass of the mobile tooling 1, μ is the coefficient of kinetic friction between the mobile tooling 1 and the ground, σ s is the yield strength of the three-stage positioning pin 2, n is the safety factor, g is the acceleration of gravity, Δl is the distance that the three-stage positioning pin 2 approaches the reset direction in the tooling movement direction during the reset process, α 精 The taper of the chamfer of the third-level positioning pin 2, L is the length of the third-level positioning pin 2 extending from the bottom of the movable tool 1, and the derivation process is as follows;

[0053] like Figure 3 As shown, when the three-stage positioning pin 2 contacts the three-stage positioning hole bushing 7, the three-stage positioning pin 2 is subjected to a support reaction force F, and the reset process of the three-stage guide mechanism satisfies the equilibrium equation 1.1:

[0054] μ(mg-Fsinα 精 )=Fcosα 精 Formula 1.1

[0055] At the same time, according to material mechanics, the reset process of the three-level guide mechanism satisfies the combined deformation equation 1.2:

[0056]

[0057] Equation 1 can be derived by solving Equation 1.1 and Equation 1.2 together.

[0058] In this embodiment, m is 120×10 3 kg, μ is 0.05, when the material of the third-level positioning pin 2 is 30CrMnSiA, its yield strength σ s Take 833MPa, n as 5, and g as 9.8m / s 2 , α 精 Take 30°, Δl as 0.25d3, L as 150mm, and d3 should be greater than 81.67mm after calculation by formula 1. In this embodiment, d3 is 90mm;

[0059] The outer diameter d2 of the secondary positioning pin 3 satisfies Formula 2:

[0060]

[0061] Wherein, D2 is the inner diameter of the secondary positioning hole bushing 8, and D3 is the inner diameter of the tertiary positioning hole bushing 7;

[0062] like Figure 7 As shown, in order to ensure that the tertiary locating pin 2 can be accurately reset after the secondary locating pin 3 is reset, the sum of the diameter difference between the secondary locating hole bushing 8 and the secondary locating pin 3 and the diameter of the small circle of the chamfered end of the tertiary locating pin 2 should be smaller than the inner diameter D3 of the tertiary locating hole bushing 7. At the same time, the outer diameter d2 of the secondary locating pin 3 should be larger than the outer diameter d3 of the tertiary locating pin 2 and less than 2 times of it.

[0063] Specifically, the inner diameter D3 of the tertiary positioning hole bushing 7 and the outer diameter d3 of the tertiary positioning pin 2 need to be matched according to the tolerance of H7 / f7. The size of the inner diameter D3 of the tertiary positioning hole bushing 7 can be determined by the outer diameter d3 of the tertiary positioning pin 2.

[0064] In this embodiment, D3 is 90 mm, d2 is 100 mm, and D2 is 120 mm.

[0065] The width W of the ribbon 10 satisfies Formula 3:

[0066]

[0067] Among them, α 粗 is the taper of the chamfer of the secondary positioning pin 3, and h is the depth of the chamfer of the secondary positioning hole bushing 8.

[0068] like Figure 6As shown, in order to ensure that the secondary positioning pin 3 can be accurately reset after the laser receiver 5 stops in the ribbon 10 area, the sum of the width W of the ribbon 10 and the diameter of the small circle of the chamfered end of the secondary positioning pin 3 should be smaller than the diameter of the large circle of the chamfered end of the secondary positioning hole bushing 8. At the same time, the width W of the ribbon 10 should match the outer diameter d3 of the tertiary positioning pin 2 and be slightly larger than d3.

[0069] In this embodiment, α 粗 Take 30°, h take 30mm, and W take 100mm.

[0070] like Figure 5 As shown, the diameter D of the cross section of the oblong hole of the limiting hole bushing 9 is dh and length L dh And the diameter D of the limit pin 4 dp The value range of can be calculated by formula 4:

[0071]

[0072] Specifically, the limiting hole bushing 9 is an oblong hole bushing, and the diameter D of the oblong hole bushing cross section is dh and the diameter D of the limiting hole dp According to the tolerance of H7 / f7, the diameter of the limit hole D dp It should be larger than the outer diameter d3 of the third-level positioning pin 2 and less than 2 times of it.

[0073] In this embodiment, D dp Take 95mm, D dh Take 95mm, L dh Take 190mm.

[0074] The embodiment of the present application further provides a method for resetting a multi-station 6 mobile tool 1 using the above-mentioned guided reset device, which specifically includes the following steps:

[0075] (a) Move each of the mobile tooling 1 close to the station 6. When the laser receiver 5 on the mobile tooling 1 approaches the ribbon 10 on the station 6, observe the relative position of the laser receiver 5 to the ribbon 10. After the laser receiver 5 emits an audio-visual signal, stop the mobile tooling 1 within the width of the ribbon 10, so that the secondary positioning pin 3 on the mobile tooling 1 can be inserted into the secondary positioning hole bushing 8 on the station 6, completing the initial reset guidance of the mobile tooling 1 at the station 6; the primary guiding mechanism has good visibility, the mobile tooling 1 can brake and slow down in advance when approaching the station 6, and the width of the ribbon 10 reserves sufficient braking time and distance for the mobile tooling 1, which can ensure that the mobile tooling 1 is smoothly parked within the theoretical reset range, reducing repeated reset processes.

[0076] (b) driving the secondary positioning pin 3 on the mobile tooling 1 to insert it into the secondary positioning hole bushing 8 of the station 6, so that the mobile tooling 1 can make an approximate position adjustment in the moving direction, so that the tertiary positioning pin 2 on the mobile tooling 1 can be inserted into the tertiary positioning hole bushing 7 on the station 6, completing the approximate reset guidance of the mobile tooling 1 at the station 6; the mobile tooling 1 can realize the transition from the approximate reset position with a deviation of 100mm to the more precise reset position with a deviation of 10mm.

[0077] (c) driving the tertiary positioning pin 2 on the mobile tooling 1 and inserting it into the tertiary positioning hole bushing 7 of the station 6, so that the mobile tooling 1 can make further approximate position adjustment in the moving direction, thereby completing the precise reset guidance of the mobile tooling 1 at the station 6; the mobile tooling 1 can achieve a transition from a relatively precise reset position with a deviation of 10 mm to a precise reset position with a deviation of 0.1 mm.

[0078] (d) Drive the limit pin 4 on the mobile tooling 1 and insert it into the limit hole bushing 9 on the station 6, so that the mobile tooling 1 can make a small fine adjustment in the normal direction of the moving direction, thereby completing the precise limit guidance of the mobile tooling 1 at the station 6; the mobile tooling 1 can achieve a transition from a precise reset position with a deviation of 0.1mm in a single moving direction to a precise limit position with a deviation of 0.1mm in both the moving direction and the normal direction of the moving direction.

[0079] Compared with the prior art, the technology of the present invention has at least the following beneficial effects:

[0080] (1) The position of the mobile tooling 1 relative to the station 6 can be visually compared by the laser generating receiver 5 installed at the bottom of the mobile tooling 1 and the color ribbon 10 on the station 6. The position is not restricted by the spatial position of the reset structure, and the reset process of the mobile tooling 1 is visible.

[0081] (2) The multi-stage guiding and resetting device of "secondary positioning pin 3-tertiary positioning pin 2-limiting pin 4" can achieve precise guiding and resetting of the mobile tooling 1 from a deviation of at least 100 mm to a deviation of 0.1 mm, which is more than 10 times larger than the existing guiding and resetting range of a deviation of 10 mm to 0.1 mm.

[0082] (3) An algorithm for selecting the width of the ribbon 10, the diameter of the third-level positioning pin 2, the diameter of the second-level positioning pin 3, and the diameter of the limit pin 4 is given. This algorithm is more reliable than the previous empirical selection method and more efficient than the finite element calculation method.

[0083] This specification uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. The guiding and resetting device of multi-station mobile tooling is characterized by include: The primary guiding mechanism includes a laser generating receiver, which is arranged at the end of the bottom of each mobile tooling, and a color ribbon, whose reflection spectrum is consistent with the spectrum of the laser generating receiver, which is arranged at a designated position of each station; The secondary guiding mechanism includes a plurality of secondary positioning pins provided on the bottom surface of each mobile tooling, and a plurality of secondary positioning hole bushings provided on the ground surface of each station and cooperating with the secondary positioning pin hole pins; A three-level guiding mechanism, comprising a plurality of three-level positioning pins, provided on the bottom surface of each mobile tooling, and a plurality of three-level positioning hole bushings, provided on the ground of each station, cooperating with the three-level positioning pin hole pins; and A limiting mechanism, comprising a plurality of limiting pins, provided on the bottom surface of each mobile tooling, and a plurality of limiting hole bushings, provided on the ground surface of each station, cooperating with the limiting pin hole pins; The laser generating receiver, the secondary positioning pin, the tertiary positioning pin, and the limit pin are sequentially arranged on the intersection line of the symmetry surface and the bottom surface of each movable tooling; The ribbon, the secondary positioning hole bushing, the tertiary positioning hole bushing, and the limit hole bushing are sequentially arranged on each station, and their positions correspond to the positions of the laser generating receiver, the secondary positioning pin, the tertiary positioning pin, and the limit pin on the mobile tooling respectively; The outer diameter d3 of the three-stage positioning pin satisfies formula 1: Wherein, m is the mass of the mobile tooling, μ is the kinetic friction coefficient between the mobile tooling and the ground, σ s is the yield strength of the three-stage positioning pin, n is the safety factor, g is the acceleration of gravity, Δl is the distance that the three-stage positioning pin approaches the reset direction in the tooling movement direction during the reset process, α 精 The taper of the chamfer of the three-stage positioning pin, L is the length of the three-stage positioning pin extending from the bottom of the movable tooling; The outer diameter d2 of the secondary positioning pin satisfies Formula 2: Wherein, D2 is the inner diameter of the bushing of the secondary positioning hole, and D3 is the inner diameter of the bushing of the tertiary positioning hole; The width W of the ribbon satisfies Equation 3: Among them, α 粗 is the taper of the secondary locating pin chamfer, and h is the depth of the secondary locating hole bushing chamfer.

2. The guiding and resetting device of the multi-station mobile tooling according to claim 1 is characterized in that The diameter of the small circle at the chamfered end of the third-level locating pin is half of the outer diameter d3 of the third-level locating pin. The inner diameter D3 of the third-level locating hole bushing and the outer diameter d3 of the third-level locating pin need to be matched according to the tolerance of H7 / f7 to determine the size of the inner diameter D3 of the third-level locating hole bushing.

3. The guiding and resetting device of the multi-station mobile tooling according to claim 1 is characterized in that The small circle diameter of the chamfered end of the secondary positioning pin is half of the outer diameter d2 of the secondary positioning pin. The secondary positioning hole bushing includes a chamfer. The taper of the chamfer of the secondary positioning hole bushing is consistent with the taper of the chamfer of the secondary positioning pin. The large circle diameter of the chamfered end of the secondary positioning hole bushing can be obtained by the inner diameter D2 of the secondary positioning hole bushing and the taper α of the chamfer of the secondary positioning hole bushing. 粗 The depth h of the chamfer of the secondary positioning hole bushing is calculated.

4. The guiding and resetting device for multi-station mobile tooling according to claim 1 is characterized in that The limiting hole bushing is an oblong hole bushing, and the inner diameter D of the oblong hole bushing cross section is dh and the outer diameter D of the limit pin dp According to the tolerance of H7 / f7, the inner diameter D of the cross section of the oblong hole of the limit hole bushing is dh and length L dh And the outer diameter D of the limit pin dp The value range of can be calculated by formula 4:

5. A method for resetting the guide and reset device of the multi-station mobile tooling according to any one of claims 1 to 4, comprising the following steps: (a) moving each of the mobile tools close to the station, and when the laser receiver on the mobile tool approaches the ribbon on the station, observing the relative position of the laser receiver to the ribbon, and after the laser receiver emits an audible and visual signal, stopping the mobile tool within the width of the ribbon so that the secondary positioning pin on the mobile tool can be inserted into the secondary positioning hole bushing on the station, thereby completing the initial reset guidance of the mobile tool at the station; (b) driving the secondary positioning pin on the mobile tooling to insert into the secondary positioning hole bushing of the station, so that the mobile tooling can make an approximate position adjustment in the moving direction, so that the tertiary positioning pin on the mobile tooling can be inserted into the tertiary positioning hole bushing on the station, completing the approximate reset guidance of the mobile tooling at the station; (c) driving the three-stage positioning pin on the mobile tool to insert into the three-stage positioning hole bushing of the station, so that the mobile tool can make further approximate position adjustment in the moving direction, thereby completing the precise reset guidance of the mobile tool at the station; (d) driving the limit pin on the movable tooling and inserting it into the limit hole bushing on the station, so that the movable tooling can make a small adjustment in the normal direction of the moving direction, thereby completing the precise limit guidance of the movable tooling at the station.

Images