Thread starting point positioning tool

Abstract

The utility model discloses a thread starting point positioning tool, which belongs to the technical field of aviation product processing, and comprises a positioning frame, a first positioning structure and a second positioning structure, the positioning frame comprises a first support arm and a second support arm which are vertically connected, the first positioning structure is arranged on the first support arm and is parallel to the second support arm, and the second positioning structure is arranged on the second support arm. The second positioning structure is installed on the second supporting arm and is parallel to the first supporting arm, and a first positioning tip of the first positioning structure and a second positioning tip of the second positioning structure are located on the same plane. The first supporting arm and the second supporting arm which are vertically connected are adopted, so that the first positioning tip and the second positioning tip are located on the same plane, and after the diameter of the first supporting arm coincides with the diameter of the workpiece to be positioned, the first positioning tip is used for positioning on the top face of the workpiece to be positioned through the coincidence of the second positioning tip and the starting point of the thread; therefore, convenient and accurate positioning can be performed on the top surface of the paddle root jacket according to the starting point of the thread.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation product processing, in particular to a thread starting point positioning tool. Background Art

[0002] During the manufacturing process of the propeller root jacket, a thread is provided on the outer diameter side of the root jacket. The drawings require that the starting point of the thread on the root jacket be within a certain range. This requires positioning at the top of the root jacket so that the position of the top is within the same cross-section as the starting point of the thread.

[0003] At present, since the propeller root jacket is a cylindrical structure, the thread starting point and the top positioning point are on different planes, one is an arc surface and the other is a plane, it is difficult for operators to locate the top of the propeller root jacket according to the position of the thread starting point. Even if positioning is performed, subsequent processing may not be possible due to insufficient accuracy, or the processing efficiency may be reduced due to the long positioning time.

[0004] Therefore, how to conveniently and accurately position the top surface of the propeller root jacket according to the starting point of the thread is a technical problem that needs to be urgently solved in this field. Utility Model Content

[0005] The purpose of the utility model is to provide a thread starting point positioning tool to solve the problems existing in the above-mentioned prior art. A vertically connected first arm and a second arm are used as a positioning frame, so that the first positioning tip and the second positioning tip are in the same plane. After the first arm coincides with the diameter of the workpiece to be positioned, the second positioning tip can coincide with the thread starting point, and the first positioning tip can be used to position the top surface of the workpiece to be positioned, so that the thread starting point can be conveniently and accurately positioned on the top surface of the blade root jacket according to the thread starting point.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a thread starting point positioning tool, including a positioning frame, a first positioning structure and a second positioning structure, the positioning frame includes a first support arm and a second support arm connected vertically, the first positioning structure is installed on the first support arm, the first positioning structure is parallel to the second support arm, the second positioning structure is installed on the second support arm, the second positioning structure is parallel to the first support arm, and the first positioning tip of the first positioning structure and the second positioning tip of the second positioning structure are located in the same plane.

[0008] Preferably, it also includes a base and a positioning pin, the workpiece to be positioned is sleeved on the base, the first arm is provided with a first positioning hole for the positioning pin to pass through, the top surface of the base is provided with a second positioning hole for the positioning pin to be inserted, and the first positioning tip and the second positioning tip are located in a radial section passing through the axis of the workpiece to be positioned.

[0009] Preferably, the positioning pins include round pins and diamond pins to achieve one-side two-hole positioning.

[0010] Preferably, the base includes a base, a first positioning section and a second positioning section coaxially connected in sequence, the diameter of the first positioning section is larger than that of the second positioning section, the outer diameter arc surface of the first positioning section is used to fit the inner diameter arc surface of the workpiece to be positioned, and the top surface of the second positioning section is used to install the positioning pin.

[0011] Preferably, the first positioning structure adopts a punch, the first arm is provided with a rectangular hole, and the cross section of the punch is a rectangle matching the rectangular hole.

[0012] Preferably, the second positioning structure adopts a positioning tooth, and the positioning tooth is pressed and installed on the second supporting arm through a stopper.

[0013] Preferably, it further comprises a set screw and a countersunk screw, wherein the countersunk screw is used to connect the stopper and the second arm, and the set screw is used to position the positioning tooth.

[0014] Preferably, the set screw is threadedly connected to the stopper, and the positioning tooth has a light hole for the set screw to enter.

[0015] The utility model also provides a thread starting point positioning method, using the thread starting point positioning tool as described above, comprising the following steps:

[0016] S1, placing the first arm of the positioning frame on the top of the workpiece to be positioned, and the second arm of the positioning frame is located on the side of the workpiece to be positioned;

[0017] S2, maintaining the diameter of the first support arm coincident with the diameter of the workpiece to be positioned, and the second support arm coaxially with the workpiece to be positioned;

[0018] S3, rotating the workpiece to be positioned or the positioning frame so that the second positioning structure of the second arm changes relative to the thread of the outer diameter arc surface of the workpiece to be positioned, and the second positioning tip of the second positioning structure coincides with the starting point of the thread;

[0019] S4. Keep the positioning frame in a fixed position and move the first positioning structure of the first arm so that the first positioning tip of the first positioning structure sets a positioning point on the top surface of the workpiece to be positioned, and the positioning point and the thread starting point are located in the same radial section of the workpiece to be positioned.

[0020] Preferably, in step S2, the first arm is positioned by inserting a positioning pin into the first positioning hole of the first arm and the second positioning hole of the base, and the first positioning tip and the second positioning tip are located in a radial section passing through the axis of the workpiece to be positioned.

[0021] Compared with the prior art, the utility model has achieved the following technical effects:

[0022] The utility model adopts a vertically connected first arm and a second arm as a positioning frame, the first arm is provided with a first positioning structure with a first positioning tip, and the second arm is provided with a second positioning structure with a second positioning tip, the first positioning tip and the second positioning tip are in the same plane, and when positioning is performed, after the first arm coincides with the diameter of the workpiece to be positioned, the second positioning tip can coincide with the starting point of the thread, and the first positioning tip can be used to perform positioning on the top surface of the workpiece to be positioned, thereby enabling convenient and accurate positioning on the top surface of the propeller root jacket according to the starting point of the thread, so that the operator can determine the position corresponding to the starting point of the thread of the propeller root jacket on the top surface of the propeller root jacket, and can determine whether the requirements of the drawing are met by locating the starting point of the thread and marking it. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is the front view of the utility model;

[0025] Figure 2 It is a side view of the utility model;

[0026] Figure 3 It is a top view of the utility model;

[0027] Figure 4 This is the front view of the base of the utility model;

[0028] Among them, 1. base; 2. stopper; 3. round pin; 4. fixed bushing; 5. first positioning structure; 6. positioning frame; 61. first support arm; 62. second support arm; 7. countersunk screw; 8. second positioning structure; 9. set screw; 10. diamond pin; 11. base; 12. first positioning section; 13. second positioning section; 14. workpiece to be positioned. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The purpose of the utility model is to provide a thread starting point positioning tool to solve the problems existing in the prior art. A vertically connected first arm and a second arm are used as a positioning frame so that the first positioning tip and the second positioning tip are in the same plane. After the first arm coincides with the diameter of the workpiece to be positioned, the second positioning tip can coincide with the thread starting point, and the first positioning tip can be used to position the top surface of the workpiece to be positioned, thereby enabling convenient and accurate positioning on the top surface of the blade root jacket according to the thread starting point.

[0031] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figures 1 to 4As shown, the utility model provides a thread starting point positioning tool, which is used to position a workpiece 14 to be positioned. The workpiece 14 to be positioned can be the propeller root jacket of a propeller. The propeller root jacket is a hollow cylinder with threads on the outer diameter side. During the processing, it is necessary to determine that the thread starting point has a corresponding position with the top surface of the propeller root jacket. The corresponding position is located in the same plane as the thread starting point. Positioning can be easily achieved through the thread starting point positioning tool of the utility model. Specifically, the thread starting point positioning tool includes a positioning frame 6, a first positioning structure 5 and a second positioning structure 8. The positioning frame 6 is used to install the first positioning structure 5 and the second positioning structure 8 to determine and limit the relative positions of the two. The positioning frame 6 is L-shaped as a whole, and includes a first arm 61 and a second arm 62 connected vertically. The first positioning structure 5 is installed on the first arm 61, and the first positioning structure 5 is parallel to the second arm 62. The second positioning structure 8 is installed on the second arm 62, and the second positioning structure 8 is parallel to the first arm 61. In order to facilitate positioning and marking, the first positioning structure 5 can slide on the first arm 61 in a direction parallel to the length direction of the second arm 62, or the second positioning structure 8 can slide on the second arm 62 in a direction parallel to the length direction of the first arm 61. The first positioning tip of the first positioning structure 5 and the second positioning tip of the second positioning structure 8 are located in the same plane. When the first positioning structure 5 (or the second positioning structure 8) is positioned, the second positioning structure 8 (or the first positioning structure 5) can locate a positioning point in the same plane as the former positioning point. It can be seen from the above content that when the utility model is used for positioning, points on different surfaces can be positioned, and it is particularly suitable for positioning points on the top and side surfaces of cylinders.

[0033] The utility model adopts a vertically connected first arm 61 and a second arm 62 as a positioning frame 6, the first arm 61 is provided with a first positioning structure 5 with a first positioning tip, the second arm 62 is provided with a second positioning structure 8 with a second positioning tip, the first positioning tip and the second positioning tip are in the same plane, when positioning, after the first arm 61 coincides with the diameter of the workpiece 14 to be positioned, the second positioning tip can coincide with the starting point of the thread, and the first positioning tip can be used to position the top surface of the workpiece 14 to be positioned, so that the top surface of the propeller root jacket can be conveniently and accurately positioned according to the starting point of the thread, so that the operator can determine the position corresponding to the starting point of the thread of the propeller root jacket on the top surface of the propeller root jacket, and can determine whether the requirements of the drawing are met by locating the starting point of the thread and marking it.

[0034] It can also include a base 1 and a positioning pin. The workpiece 14 to be positioned is sleeved on the base 1. The base 1 is used to limit the workpiece 14 to be positioned, so that the position of the workpiece 14 to be positioned can be determined and stabilized, which is convenient for the positioning step. The first arm 61 is provided with a first positioning hole for the positioning pin to pass through, and the top surface of the base 1 is provided with a second positioning hole for the positioning pin to be inserted. When the positioning pin passes through the first positioning hole and is inserted into the second positioning hole, the first arm 61 and the base 1 can be positioned, and then the positioning frame 6 and the base 1 can be positioned. At this time, since the workpiece 14 to be positioned has been positioned on the base 1, the position positioning between the workpiece 14 to be positioned and the positioning frame 6 is achieved. It should be noted that: the number of positioning pins is not limited. If a non-circular shape is used, positioning can be achieved by using a single positioning pin, but the error may be large. If two positioning pins are used in combination, more accurate positioning can be achieved. After positioning the positioning pin, the first positioning tip and the second positioning tip are located in the radial cross section of the workpiece 14 to be positioned through the axis, so that the first positioning tip can be used to position a point on the top surface of the workpiece 14 to be positioned, and the second positioning tip can be used to position a certain point on the outer diameter side of the workpiece 14 to be positioned, and the two points are located in the radial cross section of the workpiece 14 to be positioned through the axis. Through the arrangement of the base 1 and the positioning pin, the position of the positioning frame 6 and the workpiece 14 to be positioned can be determined relatively easily, and there is no need to move the first arm 61 to find the diameter position of the workpiece 14 to be positioned, which further improves the convenience of operation.

[0035] The positioning pins may include a round pin 3 and a diamond pin 10. The round pin 3 and the diamond pin 10 can be used to avoid over-positioning, reduce the influence of the gap error, quickly achieve one-side two-hole positioning, and also ensure the accuracy of positioning of the positioning frame 6. A fixing bushing 4 may be provided in the first positioning hole on the first arm 61, and the fixing bushing 4 may cooperate with the round pin 3 to achieve higher positioning accuracy.

[0036] The base 1 may include a base 11, a first positioning section 12, and a second positioning section 13 connected coaxially in sequence. The base 11 is used to be placed on the ground or a table for stable placement and support. The diameter of the first positioning section 12 is larger than that of the second positioning section 13. When the workpiece 14 to be positioned is sleeved on the base 1 for positioning, the outer diameter arc surface of the first positioning section 12 is used to fit the inner diameter arc surface of the workpiece 14 to be positioned. The top surface of the second positioning section 13 is used to install the positioning pin, but the outer diameter arc surface of the second positioning section 13 does not contact the workpiece 14 to be positioned, so as to avoid processing difficulties and positioning difficulties caused by an overly large positioning surface. The workpiece 14 to be positioned has a cylindrical structure, such as the propeller root jacket used.

[0037] The first positioning structure 5 can be a punch having a first positioning tip, and the punch can be used to carve a positioning point on the top surface of the workpiece 14 to be positioned. The first arm 61 is provided with a rectangular hole, and the cross section of the punch is a rectangle matching the rectangular hole. The rectangular hole can be used as a moving guide groove of the punch, so that the punch can slide in a direction parallel to the second arm 62.

[0038] The second positioning structure 8 can be a positioning tooth, which has a second positioning tip. The positioning tooth can be used to first determine the starting positioning point, such as the starting point of the screw thread of the blade root jacket. The positioning tooth can be pressed and installed on the second arm 62 by the stopper 2, and the stopper 2 is detachable to adjust the position of the positioning tooth to adapt to different diameters of the workpiece 14 (blade root jacket) to be positioned.

[0039] It can also include a set screw 9 and a countersunk screw 7, the countersunk screw 7 is used to connect the stopper 2 and the second arm 62, and has a movable groove through which the positioning tooth passes. The set screw 9 is used to position the positioning tooth, and the countersunk screws 7 are evenly distributed around the set screw 9.

[0040] The set screw 9 is threadedly connected to the stopper 2, and the positioning tooth has a light hole for the set screw 9 to enter. By rotating the set screw 9, the connection depth of the set screw 9 can be adjusted, and then the set screw 9 can be inserted into the light hole to fix the position of the positioning tooth.

[0041] The thread starting point positioning tool of the utility model can be used as a special tool for a blade root jacket of a certain size, and can also be used as a general tool after the first arm 61 and the second arm 62 are improved into a telescopic structure.

[0042] Reference again Figures 1 to 4 As shown, the utility model also provides a thread starting point positioning method, which can apply the thread starting point positioning tool as described above, including the following steps:

[0043] S1, placing the first arm 61 of the positioning frame 6 on the top of the workpiece 14 to be positioned, and the second arm 62 of the positioning frame 6 is located on the side of the workpiece 14 to be positioned;

[0044] S2, keep the diameter of the first arm 61 coincident with that of the workpiece 14 to be positioned, and the second arm 62 coaxially with the workpiece 14 to be positioned, at which point the first positioning tip of the first positioning structure 5 and the second positioning tip of the second positioning structure 8 are located in a radial section through the axis of the workpiece 14 to be positioned;

[0045] S3, rotating the workpiece 14 to be positioned or rotating the positioning frame 6, the workpiece 14 to be positioned and the positioning frame 6 rotate relative to each other, so that the second positioning structure 8 of the second arm 62 changes the thread of the outer diameter arc surface of the workpiece 14 to be positioned, thereby adjusting the position of the second positioning tip to make the second positioning tip coincide with the starting point of the thread;

[0046] S4, keeping the positioning frame 6 in a fixed position, moving the first positioning structure 5 of the first arm 61, so that the first positioning tip of the first positioning structure 5 sets a positioning point on the top surface of the workpiece 14 to be positioned, and the positioning point and the thread starting point are located in the same radial section of the workpiece 14 to be positioned.

[0047] In step S2, when determining the position between the positioning frame 6 and the workpiece to be positioned 14, the positioning of the first arm 61 can be achieved by inserting the positioning pin into the first positioning hole of the first arm 61 and the second positioning hole of the base 1, thereby conveniently placing the first positioning tip and the second positioning tip in a radial cross-section passing through the axis of the workpiece to be positioned 14.

[0048] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A thread starting point positioning tool, characterized in that: It includes a positioning frame, a first positioning structure and a second positioning structure, the positioning frame includes a first arm and a second arm connected vertically, the first positioning structure is installed on the first arm, the first positioning structure is parallel to the second arm, the second positioning structure is installed on the second arm, the second positioning structure is parallel to the first arm, and the first positioning tip of the first positioning structure and the second positioning tip of the second positioning structure are located in the same plane.

2. The thread starting point positioning tool according to claim 1, characterized in that: It also includes a base and a positioning pin, the workpiece to be positioned is sleeved on the base, the first arm is provided with a first positioning hole for the positioning pin to pass through, the top surface of the base is provided with a second positioning hole for the positioning pin to be inserted, and the first positioning tip and the second positioning tip are located in a radial section passing through the axis of the workpiece to be positioned.

3. The thread starting point positioning tool according to claim 2, characterized in that: The positioning pins include round pins and diamond pins to achieve one-side two-hole positioning.

4. The thread starting point positioning tool according to claim 2, characterized in that: The base includes a base, a first positioning section and a second positioning section which are coaxially connected in sequence. The diameter of the first positioning section is larger than that of the second positioning section. The outer diameter arc surface of the first positioning section is used to fit the inner diameter arc surface of the workpiece to be positioned, and the top surface of the second positioning section is used to install the positioning pin.

5. The thread starting point positioning tool according to claim 1, characterized in that: The first positioning structure adopts a punch, the first arm is provided with a rectangular hole, and the cross section of the punch is a rectangle matching the rectangular hole.

6. The thread starting point positioning tool according to claim 1, characterized in that: The second positioning structure adopts a positioning tooth, and the positioning tooth is pressed and installed on the second supporting arm through a stopper.

7. The thread starting point positioning tool according to claim 6, characterized in that: It also includes a set screw and a countersunk screw, wherein the countersunk screw is used to connect the stopper and the second support arm, and the set screw is used to position the positioning tooth.

8. The thread starting point positioning tool according to claim 7, characterized in that: The set screw is threadedly connected to the stopper, and the positioning tooth has a light hole for the set screw to enter.

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