A positioning device

Abstract

The utility model relates to a positioning device, which belongs to the technical field of positioning equipment, and aims to solve the problems in the existing volute processing technology, which adopts a one-face two-pin positioning processing technology, and has a long processing cycle, high production cost and is not suitable for automated production requirements. The application includes a positioning pin and a positioning seat, one end of the positioning pin is provided with a mounting thread, and the other end is provided with a positioning pin column; the positioning pin is installed in the threaded hole of the part to be positioned through the mounting thread, and its positioning pin column constitutes the positioning end of the positioning seat; a positioning hole is opened on the positioning seat at a position corresponding to the positioning pin, and the positioning seat is assembled with the positioning end of the positioning pin through the positioning hole to form a combination with the part to be positioned, and the positioning seat constitutes the positioning part of the combination. In order to realize the positioning seat as the position positioning of the volute processing process. In the process of volute processing, the threaded hole on the part surface will not be damaged, which can improve the production progress of the volute, reduce the number of processing equipment, and reduce production costs.

Description

Technical Field

[0001] The utility model relates to a positioning device, belonging to the technical field of positioning equipment. Background Art

[0002] In mechanical processing, in order to ensure the position accuracy of the workpiece and obtain the dimensional accuracy by adjustment, the workpiece must occupy a correct position relative to the machine tool and the tool, that is, the workpiece must be positioned. The purpose of positioning the workpiece in the fixture is to make the workpiece in the processing process occupy a consistent and correct position in the fixture according to the processing requirements.

[0003] In the existing volute processing process, in order to ensure the effective positioning of the volute in each process, the common positioning processing method is to use a one-side two-pin process to position the volute on a part surface of the volute. The positioning pin is a threaded hole installed on the surface of the volute part, which is used to position the volute in the subsequent processing process. However, when this type of positioning processing technology is used to process the volute, the thread accuracy of the threaded hole on the part surface will be reduced after being positioned in multiple processes, and there is a risk of reduced thread accuracy due to the force applied to the positioning pin during the processing. Therefore, after the volute processing is completed, in order to ensure the accuracy of the threaded hole on the part surface, the threaded hole needs to be fine-machined, which leads to a long volute processing cycle and an increase in the number of processing equipment, resulting in an increase in production costs. And with the development of automated production, the traditional one-side two-pin positioning process is used. When the mechanical clamping equipment in the automation clamps the part, there is a problem that the part surface cannot be effectively clamped, and it is easy to cause damage to the positioning pin and the threaded hole. Therefore, a positioning device is needed to solve the problems of long processing cycle, high production cost and unsuitability for automated production requirements in the existing volute processing technology using the one-side two-pin positioning process. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning device, including a positioning pin and a positioning seat, one end of the positioning pin is provided with a mounting thread, and the other end is provided with a positioning pin column; the positioning pin is installed in the threaded hole of the part to be positioned through the mounting thread, and the positioning pin column constitutes the positioning end of the positioning seat; a positioning hole is opened on the positioning seat at a position corresponding to the positioning pin, and the positioning seat is assembled with the positioning end of the positioning pin through the positioning hole to form an assembly with the part to be positioned, and the positioning seat constitutes the positioning part of the assembly.

[0006] Specifically, a plurality of threaded holes are provided on the part surface of the part to be positioned, two of which constitute the mounting holes of the positioning pins; two positioning holes are provided on the tooling surface of the positioning seat, and when the positioning seat and the part to be positioned form a combination, the tooling surface fits against the part surface.

[0007] Specifically, the positioning pin column of the positioning pin is a cylindrical structure, and a disassembly head is provided at one end of the positioning pin shaft away from the installation thread, which is used to install or disassemble the positioning pin and the threaded hole of the part to be positioned.

[0008] Specifically, the disassembly head is an external hexagonal structure.

[0009] Specifically, an arc-shaped chamfered guide portion is provided on the outer side of the column body of the positioning pin column located on the disassembly head side.

[0010] Specifically, the area between the positioning pin column and the mounting thread of the positioning pin protrudes outward to form a positioning portion that abuts against the part surface where the threaded hole of the part to be positioned is located.

[0011] Specifically, one of the positioning holes on the positioning seat is a circular positioning hole, and the other positioning hole is a diamond-shaped positioning hole.

[0012] Specifically, a plurality of protrusions are provided on the tooling surface of the positioning seat. When the positioning seat and the part to be positioned form a combination, the tooling surface of the positioning seat is fitted to the part surface through the protrusions.

[0013] Specifically, the plurality of protrusions are evenly spaced along the circumference around the center of the tooling surface; the plurality of protrusions include circular protrusions and fan-shaped protrusions, and the circular protrusions are arranged in a one-to-one correspondence with the threaded holes on the part surface except for the threaded holes constituting the mounting holes.

[0014] Specifically, when the locating pin is installed in the threaded hole of the part to be positioned, when the installation thread is not tightened, a clearance fit is formed between the locating pin and the threaded hole, and the clearance size is 0.01-0.05mm; when the locating seat is assembled with the locating end of the locating pin through the locating hole to form a combination with the part to be positioned, a clearance fit is formed between the locating pin and the locating hole, and the clearance size is 0.01-0.05mm.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The present application provides a locating pin and a locating seat, and installs and connects the locating pin with the threaded hole on the surface of the volute part. The locating pin column of the locating pin constitutes the locating pin of the locating seat. Then, by opening a locating hole on the locating seat, the locating pin and the locating hole are assembled, so that the volute and the locating seat form a combination, so as to realize the locating seat as the position positioning of the volute processing process. During the volute processing, the threaded holes on the part surface will not be damaged, thereby ensuring the positioning accuracy of the volute, and at the same time ensuring the thread accuracy of the threaded holes. There is no need to perform fine processing of the threaded holes after the volute processing is completed, thereby improving the production progress of the volute, reducing the number of processing equipment, and reducing production costs.

[0017] 2. On the basis of the above, the two positioning holes on the positioning seat of the present application that cooperate with the cylindrical positioning pin, one of which is made into a circular positioning hole, and the other positioning hole is made into a diamond positioning hole, so as to avoid over-positioning problems between the volute and the positioning seat during assembly.

[0018] 3. On the basis of the foregoing, the present application adopts a volute and a positioning seat to form a combination, which is convenient for the mechanical clamping equipment in automated production to clamp the combination tightly, so as to cover all processes in the production line that need to use this reference, thereby ensuring that the position of the volute can remain stable and consistent.

[0019] 4. On the basis of the above, in order to prevent the mechanical clamping equipment from damaging the threaded hole when clamping the assembly, the present application provides a protrusion on the tooling surface of the positioning seat, so that when the positioning seat and the volute form an assembly, the tooling surface of the positioning seat fits the part surface through the protrusion, thereby ensuring that the clamping force of the mechanical clamping equipment is borne by the positioning seat and will not be transmitted to the positioning pin, thereby protecting the threaded hole. At the same time, it is also convenient for the mechanical clamping equipment to effectively clamp the assembly.

[0020] 5. On the basis of the foregoing, in order to improve the installation efficiency of the locating pin, the present application provides a disassembly head at the end of the locating pin to facilitate the rapid disassembly and assembly of the locating pin, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an exploded schematic diagram of the installation of the positioning device and the volute of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a positioning pin of the positioning device of the utility model;

[0023] Figure 3 A top view of a positioning pin of the positioning device of the utility model;

[0024] Figure 4 It is a schematic diagram of the installation of the positioning pin and the volute of the utility model;

[0025] Figure 5 It is a structural schematic diagram of a positioning seat of the positioning device of the utility model;

[0026] Figure 6 It is a front view of the positioning seat of the positioning device of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the embodiments below. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the scope of protection specifically requested by the utility model. For the sake of clarity, the part to be positioned in this embodiment is a volute, and the air outlet end is selected as the part surface.

[0028] See also Figure 1-Figure 6 A positioning device includes a positioning pin 10 and a positioning seat 11. One end of the positioning pin 10 is provided with a mounting thread 3, and the other end is provided with a positioning pin column 2; the positioning pin 10 is installed in the threaded hole 9 of the volute 13 through the mounting thread 3, and its positioning pin column 2 constitutes the positioning end of the positioning seat 11; a positioning hole 12 is opened on the positioning seat 11 at a position corresponding to the positioning pin, and the positioning seat 11 is assembled with the positioning end of the positioning pin through the positioning hole 12 to form a combination with the volute 13, and the positioning seat constitutes the positioning part of the combination.

[0029] The four corners of the outlet end part surface of the volute in this embodiment are respectively provided with threaded holes 9, wherein the two threaded holes at opposite corners constitute the mounting holes of the positioning pins; the tooling surface of the positioning seat is provided with two positioning holes 12, and when the positioning seat and the volute form a combined body, the tooling surface is fitted to the part surface. One of the positioning holes on the positioning seat is a circular positioning hole 120, and the other positioning hole is a diamond positioning hole 121.

[0030] Furthermore, the positioning pin 2 of the positioning pin 10 of this embodiment is a cylindrical structure, and a disassembly head 1 is provided at one end of the positioning pin shaft away from the installation thread, which is used to install or disassemble the positioning pin with the threaded hole at the air outlet end of the volute. The disassembly head 1 is an external hexagonal structure.

[0031] In this embodiment, the positioning pin 2 is provided with an arc-shaped chamfered guide portion 5 on the outer side of the column body located on the disassembly head side.

[0032] In addition, the area between the positioning pin column and the mounting thread of the positioning pin 10 of this embodiment protrudes outward to form a positioning portion 4 that abuts against the part surface where the threaded hole of the volute is located.

[0033] The tooling surface of the positioning seat of this embodiment is provided with a plurality of protrusions 8. When the positioning seat and the part to be positioned form a combination, the tooling surface of the positioning seat is attached to the part surface through the protrusions. The plurality of protrusions are evenly spaced along the circumference around the center of the tooling surface; the plurality of protrusions include circular protrusions and fan-shaped protrusions, and the circular protrusions are arranged one-to-one with the threaded holes on the part surface except the threaded holes constituting the mounting holes.

[0034] The positioning device of this embodiment is to achieve the final position accuracy requirement of the volute. When the positioning pin of this embodiment is installed in the threaded hole of the part to be positioned, when the mounting thread is not tightened, a clearance fit is formed between the positioning pin and the threaded hole, wherein the diameter size of the threaded end of the positioning pin is mm, the diameter of the threaded hole in the volute is mm, thereby ensuring that the gap between the locating pin and the threaded hole is maintained at 0.01-0.05mm; when the locating seat is assembled with the locating end of the locating pin through the locating hole to form a combination with the part to be positioned, a clearance fit is formed between the locating pin and the locating hole, wherein the diameter of the locating pin column is mm, and the aperture size of the positioning hole is mm, and the gap size between the two is maintained at 0.01-0.05mm.

[0035] Working principle: When the positioning device of this embodiment is used, firstly a threaded hole is machined on the outlet end of the volute, and then the threaded hole is threaded to form a threaded hole. Then the outer hexagonal disassembly head of the positioning pin is installed into the electric screwdriver head, and then the installation thread of the positioning pin is screwed into the installation hole of the outlet end face of the volute through the electric screwdriver head, and then tightened. When tightening, it is necessary to ensure that the raised positioning part of the positioning pin is completely in contact with the part surface of the volute, that is, the outlet end, and the installation of the positioning pin is completed. The state of the volute after the positioning pin is installed is as follows: Figure 4 Connect the volute with the locating pins installed to the locating holes on the locating seat, ensuring that the part surface fits the protrusions on the tooling surface to form a combined body.

[0036] Then, the assembly is clamped and transferred to various processing stations for subsequent processing of the volute using mechanical clamping equipment. At each processing station, the assembly is positioned as the volute position of the volute using the positioning seat, and the threaded hole will not be damaged during the processing. After the processing is completed, the volute is taken out and the positioning pin is screwed out using an electric screwdriver.

[0037] The implementation methods of the utility model are described in detail above in conjunction with the embodiments, but the utility model is not limited to the above-mentioned implementation methods. For ordinary technicians in this technical field, after knowing the contents recorded in the utility model, they can make several equivalent changes and substitutions thereto without departing from the principle of the utility model. These equivalent changes and substitutions should also be regarded as belonging to the protection scope of the utility model.

Claims

1. A positioning device, comprising a positioning pin and a positioning seat, characterized in that: One end of the locating pin is provided with a mounting thread, and the other end is provided with a positioning pin column; the locating pin is installed in the threaded hole of the part to be positioned through the mounting thread, and the positioning pin column constitutes the locating end of the locating seat; a locating hole is opened on the locating seat at a position corresponding to the locating pin, and the locating seat is assembled with the locating end of the locating pin through the locating hole to form an assembly with the part to be positioned, and the locating seat constitutes the locating part of the assembly.

2. A positioning device according to claim 1, characterized in that: The part surface of the part to be positioned is provided with a plurality of threaded holes, two of which constitute the mounting holes of the positioning pins; the tooling surface of the positioning seat is provided with two positioning holes, and when the positioning seat and the part to be positioned form a combination, the tooling surface fits against the part surface.

3. A positioning device according to claim 2, characterized in that: The positioning pin column of the positioning pin is a cylindrical structure, and a disassembly head is provided at one end of the positioning pin shaft away from the installation thread, which is used to install or disassemble the positioning pin and the threaded hole of the part to be positioned.

4. A positioning device according to claim 3, characterized in that: The disassembly head is an external hexagonal structure.

5. A positioning device according to claim 3, characterized in that: The outer side of the column body of the positioning pin column located on the disassembly head side is provided with an arc-shaped chamfered guide portion.

6. A positioning device according to claim 3, characterized in that: The area between the positioning pin column and the installation thread of the positioning pin protrudes outward to form a positioning portion that abuts against the part surface where the threaded hole of the part to be positioned is located.

7. A positioning device according to claim 2, characterized in that: One of the positioning holes on the positioning seat is a circular positioning hole, and the other positioning hole is a diamond-shaped positioning hole.

8. A positioning device according to claim 2, characterized in that: The tooling surface of the positioning seat is provided with a plurality of protrusions. When the positioning seat and the part to be positioned form a combined body, the tooling surface of the positioning seat is fitted to the part surface through the protrusions.

9. A positioning device according to claim 8, characterized in that: The plurality of protrusions are evenly spaced along the circumference around the center of the tooling surface; the plurality of protrusions include circular protrusions and fan-shaped protrusions, and the circular protrusions are arranged one-to-one with the threaded holes on the part surface except the threaded holes constituting the mounting holes.

10. A positioning device according to claim 1, characterized in that: When the locating pin is installed in the threaded hole of the part to be positioned and the mounting thread is not tightened, a clearance fit is formed between the locating pin and the threaded hole, and the clearance size is 0.01-0.05mm; when the locating seat is assembled with the locating end of the locating pin through the locating hole to form a combination with the part to be positioned, a clearance fit is formed between the locating pin and the locating hole, and the clearance size is 0.01-0.05mm.

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