A thin-walled cylindrical part intersecting surface plug-in vertical assembly tool and assembly method

Abstract

A thin-walled cylindrical part intersecting surface plug-in vertical assembly tool, characterized in that it includes a positioning base (1) and a positioning step pin (2); wherein the positioning base (1) is a part of a first cylinder, the upper surface of the positioning base (1) is a first cylindrical arc (101), and the axis of the first cylinder is perpendicular to the side of the positioning base (1); there is a boss (113) at the center position of the first cylindrical arc (101), and the boss (113) is a cylinder with a diameter of r4; the end face of the boss (113) is a second cylindrical arc (103), and the second cylindrical arc (103) is a part of the outer wall of the second cylinder; the present invention has a simple structure, is easy to use, greatly shortens the production time, and at the same time ensures the accuracy of the relative position of the connection of the thin-walled cylindrical parts in the intersecting assembly, greatly improving the accuracy of the product.

Description

Technical Field

[0001] The invention discloses a thin-walled cylindrical part intersecting surface plug-in vertical assembly tool and an assembly method, which are used for accurately ensuring the insertion depth and verticality of parts during the intersecting assembly of thin-walled cylindrical parts, and belongs to the field of mechanical assembly. Background Art

[0002] At present, in order to reduce the working temperature of the equipment and ensure the normal operation of the equipment, it is often necessary to equip the equipment with a cooling system. The cooling system is usually composed of pipelines. It is often encountered that thin-walled tubes are welded on the outer cylindrical surface of the thin-walled cylinder. At this time, in order to ensure the sealing, it is usually assembled by insertion, and then the bottom is locked and welded. In order to ensure the welding effect, one end of the welded part is usually processed into an arc cylinder. After insertion, the thickness of the entire circle of welding base material is guaranteed to be uniform to improve the welding quality. Usually, this work is assembled by manual hand-held insertion. Due to the intersecting arc surface, the insertion depth is difficult to measure. At the same time, because the wall thickness of the thin-walled cylinder is thin, the insertion depth is relatively shallow. The inserted parts are also easy to tilt, and the verticality with the outer cylindrical surface of the thin-walled cylinder is difficult to ensure. Summary of the invention

[0003] The purpose of the present invention is to provide a thin-walled cylindrical part intersecting surface plug-in vertical assembly tool and assembly method to ensure the insertion depth and verticality of the thin-walled cylinder outer cylindrical surface assembly parts and solve the technical problems mentioned in the background.

[0004] A thin-walled cylindrical part intersecting surface plug-in vertical assembly tool, characterized in that it comprises a positioning base 1 and a positioning step pin 2,

[0005] The positioning base 1 is a part of the first cylinder, the upper surface of the positioning base 1 is a first cylindrical arc 101, and the axis of the first cylinder is perpendicular to the side of the positioning base 1; there is a boss 113 at the center of the first cylindrical arc 101, and the boss 113 is a cylinder with a diameter of r4; the end face of the boss 113 is a second cylindrical arc 103, and the second cylindrical arc 103 is a part of the outer wall of the second cylinder; a large pin hole 104 with a radius of r1 is provided at the center of the end face of the boss 113, and the bottom surface 105 of the pin hole in the large pin hole 104 is a plane; a small pin hole 106 with a radius of r2 is provided on the bottom surface 105 of the pin hole, wherein r1>r2; the small pin hole 106 passes through the bottom of the positioning base 1, and the small pin hole 106 is provided with an internal thread;

[0006] A through groove 102 is provided on the first cylindrical arc 101 around the boss 113;

[0007] The positioning step pin 2 is a cylindrical double-step metal structural part. The lower part of the positioning step pin 2 is provided with an external thread 201 that can cooperate with the small pin hole 106. The bottom surface of the positioning cylindrical surface 203 in the middle of the positioning step pin 2 is a positioning plane 202. The positioning cylindrical surface 203 includes at least two annular bosses 204 for positioning; the radius of the two annular bosses 204 is r3, wherein r4>r3>r1; the distance between the two annular bosses 204 is set; and the upper end of the positioning cylindrical surface 203 is an outer hexagonal prism 205;

[0008] The positioning step pin 2 is installed in the large pin hole 104 in the middle of the positioning base 1, the external thread 201 at the lower part of the positioning step pin 2 is installed in the small pin hole 106, the positioning plane 202 of the positioning step pin 2 is in contact with the bottom surface 105 of the pin hole of the positioning base 1; the lower end of the positioning cylinder 203 is transitionally matched with the large pin hole 104.

[0009] The two cylindrical arc surfaces where the first cylindrical arc 101 and the second cylindrical arc 103 of the positioning base 1 are located are concentric cylindrical surfaces.

[0010] The cylindrical diameter of the second cylindrical arc 103 is greater than the cylindrical diameter of the first cylindrical arc 101 .

[0011] The two cylindrical arc surfaces where the first cylindrical arc 101 and the second cylindrical arc 103 of the positioning base 1 are located are concentric cylindrical surfaces, the coaxiality of which is 0.02 mm, and the difference between the two diameters is 1 to 10 mm.

[0012] The setting distance between the two annular bosses 204 of the positioning step pin 2 is 10 to 200 mm.

[0013] A method for vertically assembling thin-walled cylindrical parts by plug-in intersecting surfaces, characterized in that the assembly is performed using the positioning base 1 and the positioning step pin 2 described in claim 1, and includes the following steps:

[0014] Step 1: fit the cylindrical surfaces on both sides of the positioning base 1 to the inner wall of the thin-walled cylindrical surface 4, and insert the central boss of the positioning base 1 into the opening of the thin-walled cylindrical surface 4;

[0015] Step 2: Screw the positioning step pin 2 into the small pin hole 106 of the positioning base 1 through the lower end external thread 201 and install it on the positioning base 1. The positioning platform 202 of the positioning step pin 2 is tightly attached to the bottom surface 105 of the pin hole of the positioning base 1. The two annular bosses 204 on the positioning cylindrical surface 203 are matched with the inner wall of the large pin hole 104, and the axis of the positioning step pin 2 is kept perpendicular to the arc 103 of the second cylindrical surface.

[0016] Step 3: insert the cylindrical assembly 3 into the outside of the positioning step pin 2, insert the assembly 3 into the opening of the thin-walled cylinder 4, and make the intersecting surface at the bottom of the assembly 3 fit with the intersecting surface at the end of the boss 113 at the center of the positioning base 1;

[0017] Step 4: Fix the connection between the diameter of the assembled part 3 and the opening of the thin-walled cylinder 4.

[0018] Among them, in step 4, the connection between the assembled part 3 and the opening of the thin-walled cylindrical surface 4 is fixed by welding or bonding.

[0019] Effects of the present invention:

[0020] The invention has a simple structure and is easy to use, which greatly shortens the production time, and at the same time ensures the relative position accuracy of the thin-walled cylindrical parts intersecting assembly parts, greatly improving the accuracy of the product. The invention uses the principle of concentric cylindrical surfaces and pin connection positioning to solve the problem that when thin-walled cylindrical parts are intersecting, the insertion depth of the inserted parts is difficult to control due to the shallow insertion depth, and the difficult problem of easy tilting during assembly. The tool structure is simple and easy to use, and can greatly improve the accuracy and efficiency of the thin-walled cylindrical parts intersecting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 , is a three-dimensional schematic diagram of the assembly state of the present invention;

[0022] Figure 2 ,for Figure 1 Schematic diagram of the mid-section;

[0023] Figure 3 , is a front view of the positioning base 1 of the present invention;

[0024] Figure 4 ,for Figure 3 AA section view;

[0025] Figure 5 ,for Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 6 , is a three-dimensional diagram of the positioning base 1 of the present invention;

[0027] Figure 7 ,for Figure 6 A schematic diagram of a middle cross-sectional view;

[0028] Figure 8 , is a three-dimensional diagram of the positioning step pin 2 of the present invention;

[0029] Fig. 9 , is a schematic diagram of the use state of the present invention;

[0030] Fig.10, is a schematic diagram of the use status of the present invention

[0031] (a) a cross-sectional view of the present invention in use;

[0032] (b) is an enlarged view of the structure at point C in (a).

[0033] Among them, 1 is a positioning base, 2 is a positioning step pin, 3 is an assembled part, 4 is a thin-walled cylinder, 101 is a first cylindrical arc, 102 is a through groove, 103 is a second cylindrical arc, 104 is a large pin hole, 105 is a pin hole bottom surface, 106 is a small pin hole, 113 is a boss, 201 is an external thread, 202 is a positioning plane, 203 is a positioning cylinder, 204 is an annular boss, and 205 is an external hexagonal prism. DETAILED DESCRIPTION

[0034] The objective of the present invention is achieved through the following technical solutions:

[0035] The present application provides a positioning method and a tooling device, including a positioning base and a threaded positioning step pin.

[0036] The positioning base 1 is a double-arc metal structural part, with a boss 113 at the center of the positioning base 1, the end surface of the boss 113 is an arc feature, and the center of the boss 113 is a stepped hole, wherein the upper end is a large pin hole 104 with a larger diameter, and the lower end is a threaded through hole with a smaller diameter. Small pin hole 106, both sides of the boss 113 are lightening grooves, i.e., through grooves 102, and both sides of the through groove 102 are first cylindrical arcs 101;

[0037] The positioning step pin 2 is a double-step metal structural part, with an external thread 201 at the lower end and a positioning cylindrical surface 203 in the middle. The end surface of the positioning cylindrical surface 203 close to the external thread 201 is a positioning plane 202. A plurality of annular bosses 204 are provided on the positioning cylindrical surface 203. The upper end of the positioning cylindrical surface 203 is an external hexagonal feature, which meets the standard requirements of external hexagonal bolts.

[0038] The positioning step pin 2 is mounted on the positioning base 1 by cooperating with the small pin hole 106 of the internal thread hole of the positioning base 1 through the external thread 201 at the lower end. The positioning plane 202 is in close contact with the bottom surface 105 of the pin hole in the center of the boss 113, and the positioning cylindrical surface 203 is matched with the inner cylindrical surface of the large pin hole 104 to ensure that the axis of the positioning step pin 2 coincides with the cylindrical axis of the boss 113.

[0039] The positioning base 1 is characterized in that the two cylindrical arc surfaces of the positioning base 1 are concentric cylindrical surfaces, that is, the first cylindrical arc 101, the second cylindrical arc 103 of the end surface of the boss 113 is coaxial with the first cylindrical arc 101, and the coaxiality is 0.02mm; the second cylindrical arc 103 is 1 to 10mm larger in diameter than the first cylindrical arc 101;

[0040] The positioning step pin 2 is characterized in that the coaxiality of the central axis of the middle boss 113 of the positioning step pin 2 and the two annular bosses 204 is 0.02mm, the verticality of the central axis of the annular boss 204 and the lower bottom surface is 0.02mm, and the distance between the two steps is 10 to 200mm.

[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0042] Example 1

[0043] See also Figure 1 to Figure 7 As shown, the tooling includes:

[0044] The positioning base 1 is the installation base for the positioning step pin 2 and is a double-arc metal structural part. The center of the positioning base is a boss 113, the end face of the boss is a circular arc feature 103, the center of the boss 113 is a step hole, the upper end of which is a pin hole 104 with a larger diameter, and the lower end is a threaded through hole 106 with a smaller diameter. Both sides of the boss are lightening grooves 102, and both sides of the lightening groove are cylindrical circular arc features 101;

[0045] The positioning step pin 2 is installed in the middle of the positioning base 1 and is a double-step metal structural part, with an external thread 201 at the lower end, a cylindrical bottom surface in the middle as a positioning plane 202, a cylindrical surface in the middle as a positioning cylindrical surface 203, a multi-step feature at the upper end, including an annular boss 204, and an external hexagonal feature 205 at the upper end, which complies with the standard provisions of external hexagonal bolts;

[0046] See also Figure 6-7When the present invention is working, the cylindrical arc features 101 on both sides of the lightening groove of the positioning base 1 are fitted with the inner wall of the thin-walled cylindrical part 4, and the boss of the positioning base 1 is inserted into the hole on the cylindrical surface of the thin-walled cylindrical part 4, and the outer diameter of the boss is tightly matched with the inner diameter of the hole on the cylindrical surface of the thin-walled cylindrical part 4; the positioning step pin 2 is installed on the positioning base 1, and the thread feature 201 of the positioning step pin 2 is screwed into the thread feature 106 of the positioning base 1, and the bottom surface 202 of the positioning step pin 2 is fitted with the bottom surface 105 of the positioning base 1, and the cylindrical surface 203 of the positioning step pin 2 is tightly matched with the bottom surface 106 of the positioning base 1. The inner wall 104 of the pin hole of the positioning base 1 fits together to form a pin positioning, ensuring that the positioning step pin 2 is perpendicular to the cylindrical arc feature 101 of the positioning base 1, and a wrench is used to apply torque to the outer hexagonal feature 205 of the positioning step pin 2 to ensure that the positioning step pin 2 is firmly connected to the positioning base 1; the assembly part 3 is sleeved on the outside of the positioning step pin 2, and the intersecting surface at one end of the assembly part 3 fits together with the cylindrical surface 103 of the positioning base 1 to achieve the positioning of the assembly insertion depth; the inner wall of the assembly part 3 fits together with the positioning profile 204 of the positioning step pin 2 to achieve the positioning of the assembly verticality.

[0047] A thin-walled cylindrical part intersecting surface plug-in vertical assembly tool and assembly method, characterized by comprising:

[0048] Positioning base 1 and positioning step pin 2;

[0049] The positioning base 1 is a double-arc metal structural part, with a boss 113 at the center of the positioning base 1, the end face of the boss 113 is a second cylindrical arc 103, and the center of the boss 113 is a stepped hole, wherein the upper end is a large pin hole 104 with a larger diameter, and the lower end is a small pin hole 106 with a smaller diameter and a threaded through hole, and both sides of the boss 113 are lightening grooves, i.e., through grooves 102, and both sides of the through groove 102 are first cylindrical arcs 101;

[0050] The positioning step pin 2 is a double-step metal structural part, the lower end of which is an external thread 201, the bottom surface of the middle positioning cylindrical surface 203 is a positioning plane 202, a plurality of annular bosses 204 are provided on the positioning cylindrical surface 203, and the upper end of the positioning cylindrical surface 203 is an external hexagonal feature, which meets the standard requirements of external hexagonal bolts;

[0051] The first cylindrical arc 101 and the second cylindrical arc 103 of the positioning base 1 are concentric cylindrical surfaces with a coaxiality of 0.02 mm. The second cylindrical arc 103 on the end face of the boss 113 is 1 to 10 mm larger in diameter than the first cylindrical arc 101.

[0052] The coaxiality of the central axis of the positioning cylindrical surface 203 and the multiple annular bosses 204 in the middle of the positioning step pin 2 is 0.02mm, the verticality of the outer axis of the middle cylinder and the lower bottom surface is 0.02mm, and the distance between the two steps is 10 to 200mm.

[0053] A method for vertically assembling thin-walled cylindrical parts by plug-in intersecting surfaces and a method for using the tool, characterized in that the assembly is performed using the positioning base and positioning step pins described in claims 1 to 3, including the following steps:

[0054] S1. Fit the cylindrical surfaces on both sides of the positioning base with the assembled thin-walled cylindrical surface, and insert the boss at the center of the positioning base into the opening of the thin-walled cylindrical surface;

[0055] S2. Assemble the positioning base and the positioning step pin: The positioning step pin is screwed into the internal thread hole of the positioning base through the external thread at the lower end and installed on the positioning base. The lower end surface of the middle cylindrical surface is tightly attached to the bottom surface of the step hole at the center of the cylindrical boss of the positioning base. The cylindrical surface cooperates with the inner cylindrical surface of the step hole to keep the axis perpendicular to the arc feature of the end surface of the cylindrical boss.

[0056] S3. Insert the assembled part into the positioning step pin so that the intersecting surface at the bottom of the assembled part fits with the intersecting surface at the end of the central boss of the positioning base to ensure the insertion depth; make the inner cavity surface of the assembled part fit tightly with the outer boss surface of the positioning step pin to ensure the verticality of the cylindrical surfaces on both sides of the cup assembly and the positioning base to reduce the groove.

Claims

1. A thin-walled cylindrical part intersecting surface plug-in vertical assembly tool, characterized in that: It comprises a positioning base (1) and a positioning step pin (2); The positioning base (1) is a part of a first cylinder, the upper surface of the positioning base (1) is a first cylindrical arc (101), and the axis of the first cylinder is perpendicular to the side of the positioning base (1); a boss (113) is provided at the center of the first cylindrical arc (101), and the boss (113) is a cylinder with a diameter of r4; the end surface of the boss (113) is a second cylindrical arc (103), and the second cylindrical arc (103) is a part of the outer wall of the second cylinder; a large pin hole (104) with a radius of r1 is provided at the center of the end surface of the boss (113), and the bottom surface (105) of the pin hole in the large pin hole (104) is a plane; a small pin hole (106) with a radius of r2 is provided on the bottom surface (105), wherein r1>r2; the small pin hole (106) passes through the bottom of the positioning base (1), and the small pin hole (106) is provided with an internal thread; A through groove (102) is provided on the first cylindrical arc (101) around the boss (113); The positioning step pin (2) is a cylindrical double-step metal structural part. The lower part of the positioning step pin (2) is provided with an external thread (201) that can cooperate with the small pin hole (106). The bottom surface of the positioning cylindrical surface (203) in the middle of the positioning step pin (2) is a positioning plane (202). The positioning cylindrical surface (203) includes at least two annular bosses (204) for positioning. The radii of the two annular bosses (204) are both r3, wherein r4>r3>r1; the distance between the two annular bosses (204) is a set distance; and the upper end of the positioning cylindrical surface (203) is an outer hexagonal prism (205). The positioning step pin (2) is installed in the large pin hole (104) in the middle of the positioning base (1), the external thread (201) at the lower part of the positioning step pin (2) is installed in the small pin hole (106), the positioning plane (202) of the positioning step pin (2) is in contact with the bottom surface (105) of the pin hole of the positioning base (1); the lower end of the positioning cylinder (203) is transitionally matched with the large pin hole (104); The two cylindrical arc surfaces where the first cylindrical arc (101) and the second cylindrical arc (103) of the positioning base (1) are located are concentric cylindrical surfaces; The cylindrical surface diameter of the second cylindrical surface arc (103) is greater than the cylindrical surface diameter of the first cylindrical surface arc (101).

2. A thin-walled cylindrical part intersecting surface plug-in vertical assembly tool according to claim 1, characterized in that: The two cylindrical arc surfaces where the first cylindrical arc (101) and the second cylindrical arc (103) of the positioning base (1) are located are concentric cylindrical surfaces, the coaxiality of which is 0.02 mm, and the difference between the two diameters is 1 to 10 mm.

3. A thin-walled cylindrical part intersecting surface plug-in vertical assembly tool according to claim 2, characterized in that: The setting distance between the two annular bosses (204) of the positioning step pin (2) is 10 to 200 mm.

4. A method for vertically assembling thin-walled cylindrical parts by plug-in intersecting surfaces, characterized in that: The assembly using the positioning base (1) and the positioning step pin (2) described in claim 1 comprises the following steps: Step 1: fit the cylindrical surfaces on both sides of the positioning base (1) to the inner wall of the thin-walled cylindrical surface (4), and insert the central boss of the positioning base (1) into the opening of the thin-walled cylindrical surface (4); Step 2: Screw the positioning step pin (2) into the small pin hole (106) of the positioning base (1) through the external thread (201) at the lower end and install it on the positioning base (1). The positioning plane (202) of the positioning step pin (2) is tightly attached to the bottom surface (105) of the pin hole of the positioning base (1). The two annular bosses (204) on the positioning cylindrical surface (203) are matched with the inner wall of the large pin hole (104). The axis of the positioning step pin (2) is kept perpendicular to the arc (103) of the second cylindrical surface. Step 3: insert the cylindrical assembly part (3) into the outside of the positioning step pin (2), insert the assembly part (3) into the opening of the thin-walled cylindrical surface (4), and make the intersecting surface of the bottom of the assembly part (3) fit with the intersecting surface of the end of the boss (113) at the center of the positioning base (1); Step 4: Fix the connection between the diameter of the assembled part (3) and the opening of the thin-walled cylinder (4).

5. A thin-walled cylindrical parts intersecting surface plug-in vertical assembly method according to claim 4, characterized in that: In step 4, the connection between the assembled part (3) and the opening of the thin-walled cylindrical surface (4) is fixed by welding or bonding.

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