Rapid positioning device and method for axis of complex hole system

Abstract

According to the rapid positioning tool and method for the axis of the complex hole system, the inner clamping jaw and the outer clamping jaw of the single-hole center positioning tool are used for fixing the single-hole center positioning tool in a hole of the complex hole system, the inner clamping jaw is used for fixing a core rod, and when the core rod penetrates through the two single-hole center positioning tools fixed to two holes of the complex hole system, the core rod is fixed to the center of the complex hole system. At the moment, the center of the core rod and the axis of the hole system needing to be positioned are located on the same axis, and the axis of the hole system can be accurately positioned by correcting the center of the core rod. By means of the tool and the positioning method, the axis of the hole system can be accurately found at a time when the center line of the complex hole system is positioned, and the problems that a workpiece needs to be secondarily clamped on a machine tool or specific equipment during machining or calibration, multiple precise calibration devices need to be used for auxiliary positioning, and the positioning precision is difficult to effectively guarantee are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of non-destructive testing auxiliary equipment, and more specifically, to a device for quickly locating the axis of a complex hole system and a positioning method thereof. Background Art

[0002] Complex hole systems are commonly and widely used in various fields of industrial production, mainly for connecting multiple coaxial holes of different sizes inside the product, or for connecting and supporting multiple connecting rods and similar products that need to be used coaxially. For example, some gearboxes and bases in the shipbuilding field usually consist of a hole system composed of multiple holes of different sizes, but the spacing between each hole is often as long as tens or even hundreds of millimeters, and the subsequent assembly of gear pairs or screw pairs requires high coaxiality of each hole in the hole system. However, due to the limitations of the hole system structure and machine tools, each hole in the hole system often cannot be positioned and processed in one time, and the workpiece needs to be clamped and positioned twice multiple times. Not only is the process cumbersome, but it also requires the assistance of a variety of precision equipment, and the positioning and processing accuracy is often not ideal.

[0003] With the development of science and technology, various products at home and abroad have increasingly stringent requirements on the coaxiality of hole systems. Taking the most common boring process of complex hole systems as an example, during processing, due to the large spacing between holes in the hole system, a longer boring bar is required. When the boring bar rotates during processing, tangential elastic force and rotational torque will be generated. At the same time, the boring bar's own gravity will also produce a sinking force, which will not only cause large errors in the axial accuracy of each hole in the hole system, but also cause the tool to deflect during processing, making it impossible to guarantee the roughness of the inner hole, resulting in the coaxiality of the hole system being difficult to effectively guarantee.

[0004] Therefore, it is necessary to propose a tool and method for quickly locating the axis of a complex hole system to solve the above problems. Summary of the invention

[0005] The present invention provides a tool and method for quickly locating the axis of a complex hole system, so as to solve the problem that due to various limitations of the existing hole system structure, each hole in the hole system often cannot be positioned and processed in one time, but requires multiple clamping and secondary positioning of the workpiece, which is not only cumbersome, but also requires the assistance of a variety of precision equipment, and the positioning and processing accuracy are often not ideal.

[0006] In order to achieve the above-mentioned effects, the present invention provides a device for quickly positioning the axis of a complex hole system, characterized in that it includes at least two single-hole center positioning tools and a core rod, the single-hole center positioning tool includes a chuck body, an inner jaw group and an outer jaw group, each jaw group is provided with three synchronously moving jaw bodies, the outer jaw fixes the single-hole center positioning tool in the hole of the complex hole system, the core rod passes through the interior of the single-hole center positioning tool, and is fixed by the inner jaw, the single-hole center positioning tool is used in conjunction with each other, and the three-point positioning principle is used to accurately locate the axis of the hole system.

[0007] Furthermore, the single-hole center positioning tooling also includes an outer jaw adjusting knob and an inner jaw adjusting knob, and the outer jaw and the inner jaw are adjusted to move radially respectively by the outer jaw adjusting knob and the inner jaw adjusting knob.

[0008] Furthermore, there are two single-hole center positioning fixtures, which are used in conjunction with each other and are fixed on the two inner holes of the hole system respectively with external claws.

[0009] Furthermore, the top ends of the inner and outer jaws of the single-hole center positioning tooling always remain on the inner and outer circumferences of two coaxial lines when they move radially back and forth.

[0010] Furthermore, the inner clamping jaw and the outer clamping jaw of the single-hole center positioning tool can each move in the radial direction without interfering with each other.

[0011] Furthermore, the side surfaces of the inner clamping jaw and the outer clamping jaw are provided with planar spiral grooves, and the chuck body is provided with Archimedean spiral grooves which are matched with the planar spiral grooves.

[0012] Furthermore, the inner jaw and the outer jaw realize respective synchronous radial movement on the center locator chuck body by using the Archimedean screw principle.

[0013] Furthermore, the diameter and length of the core rod can be adjusted according to experimental needs; preferably, the core rod can pass through all holes in the hole system where the axis needs to be positioned.

[0014] Furthermore, a dial indicator is provided at one end of the mandrel, and the mandrel is calibrated by the dial indicator.

[0015] The present invention also provides a positioning method for the complex hole system axis rapid positioning device as described above, characterized in that it comprises the following steps:

[0016] S1, selecting at least two coaxial inner holes that have been processed in the hole system, and placing the single-hole center positioning tooling in the inner holes respectively;

[0017] S2, rotating the respective outer jaw adjustment knobs so that the three outer jaws of the single-hole center positioning fixture perform synchronous radial displacement accordingly, and when the three outer jaws contact the inner hole wall, locking the fastening knob on the adjustment knob so that the single-hole center positioning fixture is coaxial with the corresponding inner hole;

[0018] S3, select a mandrel with a suitable diameter and length to pass through the inner hole of the single-hole center positioning tooling, rotate the adjustment knobs of each group of inner clamping claws to lock the corresponding inner clamping claws with the mandrel, make the mandrel and the single-hole center positioning tooling coaxial, and then make the mandrel and the hole system coaxial;

[0019] S4, when processing a complex hole system, the axis line of the hole system is positioned by correcting the axis line of the mandrel.

[0020] The present invention discloses a tool and method for quickly locating the axis of a complex hole system. The tool and method utilize the three-point positioning principle to fix two single-hole center positioning tools in two holes of the hole system with external clamping claws, and the mandrel is fixed with internal clamping claws. At this time, the center of the mandrel and the axis of the hole system to be positioned are automatically on the same axis. The axis of the hole system can be accurately positioned by correcting the center of the mandrel. The tool and positioning method can accurately find the axis of the hole system through simple operations when positioning the center line of the complex hole system. Compared with the prior art, the present invention solves the problem that the various holes in the complex hole system structure cannot be positioned successfully at one time due to various restrictions, and multiple precision equipment is required to assist in multiple clamping and secondary positioning of the workpiece, and the positioning accuracy is often not ideal. By utilizing the three-point positioning principle, the center of the mandrel passing through the two single-hole center positioning tools is placed on the same axis as the axis of the hole system to be positioned, and the axis of the hole system is accurately positioned by correcting the center of the mandrel. The tool avoids the problem that the workpiece needs to be clamped twice on a machine tool or specific equipment during processing or calibration, and multiple precision calibration equipment is required to assist in positioning, and the positioning accuracy is difficult to guarantee. At the same time, it reduces the requirements on the operator's experience and skill level, greatly reduces the complexity of the operation, ensures the stability of the positioning process, and effectively improves the overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 It is a front schematic diagram of the tool and method for quickly locating the center of a complex hole system of the present invention;

[0023] Figure 2 A top view of a tool and method for quickly locating the center of a complex hole system according to the present invention;

[0024] Figure 3 It is a schematic diagram of the engagement structure between the chuck body and the claw on one side of the single-hole center positioning tooling;

[0025] Figure 4 It is a cross-sectional view of a single hole center positioning tool;

[0026] Description of Figure Numbers:

[0027] Chuck body 1, outer jaw adjusting knob 2, inner jaw adjusting knob 3, outer jaw 4, inner jaw 5, tightening knob 6, core rod 7, dial indicator 8. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0030] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0031] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, the indications of these directions also change accordingly.

[0033] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation of the present invention will be described below with reference to the accompanying drawings.

[0035] See also Figure 1 and Figure 2 , and combined with Figure 3 and Figure 4 As shown, a tool and method for quickly locating the axis of a complex hole system of the present invention includes a chuck body 1, an outer jaw adjustment knob 2, an inner jaw adjustment knob 3, an outer jaw 4, an inner jaw 5, a tightening knob 6, a core rod 7, and a dial indicator 8.

[0036] The chuck body mainly serves to assemble the inner and outer jaws and the corresponding adjusting knobs. At the same time, the two sets of coaxial Archimedean spiral grooves on both sides of the chuck body move synchronously with the inner and outer adjusting knobs respectively, and engage with the planar thread grooves of the inner and outer jaws respectively, so that when the inner and outer adjusting knobs at both ends of the chuck body are rotated respectively, the inner and outer jaws will always remain on the inner and outer circumferences of two coaxial centers when moving radially.

[0037] When positioning is required, two single-hole center positioning fixtures are placed in the two inner holes of the hole system respectively, and the respective outer claw adjustment knobs 2 are rotated. At this time, the three outer claws of each single-hole center positioning fixture are radially displaced accordingly. When the three outer claws contact the inner hole wall, the tightening knob on the locking adjustment knob is tightened. Due to the three-point positioning principle, each group of single-hole center positioning fixtures is coaxial with the corresponding inner hole. Then the mandrel is passed through the inner holes of the two groups of single-hole center positioning fixtures, and the corresponding inner claws are locked with the mandrel by rotating the inner claw adjustment knobs 3 of each group. Also due to the three-point positioning principle, the mandrel and the single-hole center positioning fixture are coaxial. Since there is only one straight line between the two points, the mandrel is coaxial with the hole system to be positioned at this time.

[0038] Since the diameter and length of the mandrel can be set freely without being affected by any structure, the length of the mandrel can pass through the hole in the hole system where the axis cannot be located due to the long spacing. At this time, the axis of the mandrel is the axis of the hole in the hole system. By correcting the mandrel with simple tools such as a dial indicator, the axis of the remaining holes can be effectively located at one time.

[0039] Taking hole processing as an example, the specific steps of the method of use of the present invention are as follows:

[0040] Step 1: Select two processed coaxial inner holes in the hole system as needed, and place two single-hole center positioning tools in the corresponding inner holes of the hole system respectively.

[0041] Step 2: Rotate the outer jaw adjustment knobs of the two single-hole center positioning fixtures respectively, so that the three outer jaws of each single-hole center positioning fixture will perform synchronous radial displacement accordingly. When the three outer jaws contact the inner hole wall, lock the adjustment knob. Due to the three-point positioning principle, each group of single-hole center positioning fixtures is coaxial with the corresponding inner hole.

[0042] Step 3, select a mandrel with appropriate diameter and length and pass it through the inner holes of the two sets of single-hole center positioning tooling. By rotating the adjustment knobs 3 of each set of inner claws, the corresponding inner claws are locked with the mandrel. At this time, the mandrel and the single-hole center positioning tooling are coaxial. Since there is only one straight line between the two points, the mandrel is also coaxial with the hole system.

[0043] Step 4. Since the core rod and the hole system are coaxial at this time, when processing complex hole systems, whether using a double-head boring machine for direct correction, rotating the single-sided boring machine table 180°, or turning the workpiece 180° for re-clamping, the axis line of the hole system can be conveniently and quickly positioned by correcting the axis line of the core rod.

[0044] In addition, when encountering a hole system group composed of two or more complex hole systems, based on the relative position relationship of each hole system and the principle that three points can and can only determine one plane, this method can be used to find the axis of the hole system in two of the hole systems to locate and measure the position of the two or more hole systems.

[0045] Compared with the prior art, the present invention uses the three-point positioning principle to make the mandrel passing through the single-hole center positioning tooling and the axis of the hole system to be positioned on the same axis, and the axis of the hole system can be accurately positioned by correcting the center of the mandrel. This solves the problem that the workpiece is difficult to guarantee positioning accuracy due to multiple clamping on the machine tool or specific equipment during processing or calibration, and the need to use multiple precision calibration equipment to assist in positioning. At the same time, it reduces the requirements for the operator's experience and skill level, greatly reduces the complexity of the operation, ensures the stability of the positioning process, and effectively improves the overall work efficiency.

[0046] Finally, the method of the present application is only a preferred implementation scheme and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for quickly locating the axis of a complex hole system, characterized in that: It comprises at least two single-hole center positioning tools and a core rod. The single-hole center positioning tool comprises a chuck body, an inner jaw group and an outer jaw group. Each jaw group is provided with three jaw bodies that move synchronously. The outer jaw fixes the single-hole center positioning tool in the hole of the complex hole system. The core rod passes through the inside of the single-hole center positioning tool and is fixed by the inner jaw. The single-hole center positioning tools cooperate with each other to accurately locate the axis of the hole system by using the three-point positioning principle.

2. The complex hole system axis rapid positioning device according to claim 1 is characterized in that: The single-hole center positioning tool also includes an outer jaw adjusting knob and an inner jaw adjusting knob, and the outer jaw and the inner jaw are adjusted to move radially respectively by the outer jaw adjusting knob and the inner jaw adjusting knob.

3. The complex hole system axis rapid positioning device according to claim 1 is characterized in that: There are two single-hole center positioning fixtures, which are used in conjunction with each other and are fixed on the two inner holes of the hole system respectively by external clamping claws.

4. The complex hole system axis rapid positioning device according to claim 1 is characterized in that: The inner jaw top end and the outer jaw top end of the single-hole center positioning tool are always kept on the inner circumference and the outer circumference of two coaxial lines when they move radially back and forth.

5. The complex hole system axis rapid positioning device according to claim 4 is characterized in that: The inner clamping jaw and the outer clamping jaw of the single-hole center positioning tool can move radially independently without interfering with each other.

6. The complex hole system axis rapid positioning device according to claim 1 is characterized in that: The inner clamping jaw and the outer clamping jaw have planar spiral grooves on their sides, and the chuck body is provided with Archimedean spiral grooves that match the planar spiral grooves.

7. The complex hole system axis rapid positioning device according to claim 6 is characterized in that: The inner clamping jaw and the outer clamping jaw realize respective synchronous radial movement on the center locator chuck body by utilizing the Archimedean screw principle.

8. The complex hole system axis rapid positioning device according to claim 1 is characterized in that: The diameter and length of the core rod can be adjusted according to experimental needs; preferably, the core rod can pass through all holes in the hole system where the axis needs to be positioned.

9. The complex hole system axis rapid positioning device according to claim 8 is characterized in that: A dial indicator is also provided at one end of the mandrel, and the mandrel is calibrated by the dial indicator.

10. A positioning method for the complex hole system axis rapid positioning device according to claims 1-9, characterized in that: The steps include: S1, selecting at least two coaxial inner holes that have been processed in the hole system, and placing the single-hole center positioning tooling in the inner holes respectively; S2, rotating the respective outer jaw adjustment knobs so that the three outer jaws of the single-hole center positioning fixture perform synchronous radial displacement accordingly, and when the three outer jaws contact the inner hole wall, locking the fastening knob on the adjustment knob so that the single-hole center positioning fixture is coaxial with the corresponding inner hole; S3, select a mandrel with a suitable diameter and length to pass through the inner hole of the single-hole center positioning tooling, rotate the adjustment knobs of each group of inner clamping claws to lock the corresponding inner clamping claws with the mandrel, make the mandrel and the single-hole center positioning tooling coaxial, and then make the mandrel and the hole system coaxial; S4, when processing a complex hole system, the axis line of the hole system is positioned by correcting the axis line of the mandrel.

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