A measuring device for measuring the length of a pin of a static shoulder pin welder

Abstract

The utility model relates to the technical field of friction stir welding. A kind of measuring device of the length of stirring needle of static axle shoulder stirring welding, including one micrometer, still including one limit seat;Limit seat includes installation part, and installation hole for inserting the fixed rod of micrometer is opened on installation part, and limit seat is fixed with fixed rod through locking screw;Limit seat still includes two limit shoulder parts located in the both sides of installation part, and the clearance between two limit shoulder parts is used to accommodate stirring welding static axle shoulder;The one end of limit shoulder part is the locating surface for the lower end surface of stirring needle locking nut;The other end of limit shoulder part is fixedly connected with installation part.The utility model is combined through micrometer and limit seat, and then the accurate measurement of stirring needle length is realized.

Description

Technical Field

[0001] This utility model relates to the field of friction stir welding technology, specifically a device for measuring the length of a stirring pin. Background Technology

[0002] Friction stir welding is a welding process for aluminum alloys. During friction stir welding, the stirring pin gradually shortens due to continuous wear. Therefore, when the length of the stirring pin is less than or equal to the minimum length allowed by technical requirements, the stirring head needs to be replaced.

[0003] Currently, the length of the stirring pin is mainly measured using a handheld vernier caliper. However, since the tip of the stirring pin points vertically downwards, the traditional measurement method is inconvenient and the measurement results are inaccurate, causing distortion of the stirring pin length and thus affecting the quality of the welded products. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model provides a measuring device for measuring the length of the stirring pin in static shoulder stir welding, so as to solve at least one of the above technical problems.

[0005] To achieve the above objectives, this utility model provides a measuring device for measuring the length of the stirring pin in a static shoulder stir welding process, comprising a dial indicator, characterized in that it further comprises a limiting seat;

[0006] The limiting seat includes a mounting part, on which a mounting hole is provided for inserting a fixing rod of a dial indicator. The limiting seat and the fixing rod are fixed by a locking screw.

[0007] The limiting seat also includes two limiting shoulders located on both sides of the mounting portion, and the gap between the two limiting shoulders is used to accommodate the stationary shaft shoulder of the stir welding.

[0008] One end of the limiting shoulder is a positioning surface used to abut against the lower end face of the stirring needle locking nut;

[0009] The other end of the limiting shoulder is fixedly connected to the mounting part.

[0010] This invention achieves precise measurement of the stirring needle length by combining a dial indicator with a limiting seat. During measurement, the measuring head of the dial indicator is brought into contact with the end of the stationary shoulder of the stirring weld as the zero point. Then, the position of the limiting seat is moved so that the measuring head of the dial indicator is brought into contact with the tip of the stirring needle, thereby determining the length of the stirring needle.

[0011] During stir welding of a stationary shaft shoulder, the end of the stir welding stationary shaft shoulder slides into the workpiece, and the stirring pin penetrates into the workpiece and rotates to generate frictional heat for welding. Therefore, this device enables precise measurement of the length of the stirring pin extending beyond the shoulder shaft, using the end face of the stir welding stationary shaft shoulder as the zero point of the scale, thereby determining the range of lengths the stirring pin can penetrate into the workpiece.

[0012] More preferably, the gap between the two limiting shoulders includes a first rectangular notch, a trapezoidal notch that is wider at the top and narrower at the bottom, and a second rectangular notch arranged sequentially from top to bottom;

[0013] The first rectangular notch, the trapezoidal notch, and the second rectangular notch are interconnected;

[0014] The length of the first rectangular notch in the left-right direction is greater than the length of the second rectangular notch in the left-right direction;

[0015] The first rectangular notch is used to accommodate the stir weld stationary shoulder.

[0016] More preferably, the left and right opposite sides of the stir welding stationary shoulder are provided with through openings;

[0017] The length of the first rectangular notch in the left-right direction is greater than the length of the opening in the left-right direction of the static shoulder of the stir welding.

[0018] It allows for fine-tuning of the position of the limit seat in the left and right directions, so that the measuring head of the dial indicator can abut against the end of the stationary shoulder of the stir welding shaft and the tip of the stirring needle, respectively.

[0019] More preferably, the length of the first rectangular notch in the left-right direction is less than the inner diameter of the lower end face of the stirring needle locking nut.

[0020] This makes it easy to press against the lower end face of the locking nut of the stirring needle.

[0021] More preferably, the length of the limiting shoulder in the left-right direction is greater than half the difference between the inner and outer diameters of the lower end face of the stirring needle locking nut.

[0022] More preferably, the left and right sides of the two limiting shoulders are flush with the left and right sides of the mounting part, respectively.

[0023] More preferably, when the measuring head of the dial indicator abuts against the lower end face of the stationary shoulder of the stirring weld, the top of the two limiting shoulders abuts against the lower end face of the stirring needle locking nut;

[0024] When the measuring head of the dial indicator comes into contact with the tip of the stirring needle, the tops of the two limiting shoulders come into contact with the lower end face of the locking nut of the stirring needle.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] Compared to traditional vernier calipers, the measurement speed is much faster, requiring only 15 seconds to confirm the length of the stirring needle each time. The measurement is more accurate, down to 0.01 millimeters. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a specific embodiment 1 of the present utility model;

[0028] Figure 2 This is an exploded view of a specific embodiment 1 of the present utility model;

[0029] Figure 3 This is a schematic diagram of the structure in use of a specific embodiment 1 of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure in use of a specific embodiment 1 of this utility model;

[0031] Figure 5 This is a partial structural diagram of the stirring needle of this utility model;

[0032] Figure 6 This is a structural schematic diagram of a specific embodiment 1 of the present invention in use.

[0033] In the figure: 1 is the limit seat, 2 is the dial indicator, 3 is the stirring needle locking nut, 4 is the stirring needle, 5 is the stirring weld stationary shaft shoulder, 11 is the mounting part, 12 is the limit shoulder, 13 is the first rectangular notch, 14 is the trapezoidal notch, 15 is the second rectangular notch, 31 is the reference surface, and 51 is the contact surface. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] See Figures 1 to 6 Specific Embodiment 1: A measuring device for measuring the length of the stirring pin in a stir welding process, comprising a dial indicator 2 and a limiting seat 1; the limiting seat 1 includes a mounting part 11, on which a mounting hole is provided for inserting a fixing rod of the dial indicator 2, and the limiting seat 1 and the fixing rod are fixed by a locking screw; the limiting seat 1 also includes two limiting shoulders 12 located on both sides of the mounting part 11, the gap between the two limiting shoulders 12 being used to accommodate the stirring welding stationary shoulder 5; one end of the limiting shoulder 12 is used to abut against the lower end face of the stirring pin locking nut 3 (i.e., Figure 5The positioning surface of the reference surface 31 in the middle; the other end of the limiting shoulder 12 is fixedly connected to the mounting part 11. This utility model realizes the accurate measurement of the length of the stirring needle 4 by combining the dial indicator 2 and the limiting seat 1. During measurement, the measuring head of the dial indicator 2 is brought into contact with the end of the stirring welding stationary shoulder 5 as the zero point. Then, the position of the limiting seat 1 is moved so that the measuring head of the dial indicator 2 is brought into contact with the tip of the stirring needle 4, thereby obtaining the length of the stirring needle 4. Since the end of the stirring welding stationary shoulder 5 is slidably connected to the workpiece during stirring welding, the stirring needle 4 is inserted into the workpiece and rotates to generate frictional heat for welding. Therefore, this device realizes the precise measurement of the length of the stirring needle 4 by using the end face of the stirring welding stationary shoulder 5 (that is, the end face of the stirring welding stationary shoulder 5) as the positioning surface; the other end of the limiting shoulder 12 is fixedly connected to the mounting part 11. Figure 5 The contact surface 51 is used as the zero point of the scale to accurately measure the length of the stirring needle 4 beyond the shoulder shaft, thereby determining the length range of the stirring needle 4 that can penetrate the workpiece.

[0036] The left and right sides of the two limiting shoulders 12 are flush with the left and right sides of the mounting part 11, respectively.

[0037] The gap between the two limiting shoulders 12 includes a first rectangular notch 13, a trapezoidal notch 14 that is wider at the top and narrower at the bottom, and a second rectangular notch 15 arranged sequentially from top to bottom; the first rectangular notch 13, the trapezoidal notch 14, and the second rectangular notch 15 are interconnected; the length of the first rectangular notch 13 in the left-right direction is greater than the length of the second rectangular notch 15 in the left-right direction; the first rectangular notch 13 is used to accommodate the static shoulder 5 of the stir welding.

[0038] The stir welding stationary shoulder 5 has through openings on its left and right opposite sides; the length of the first rectangular notch 13 in the left and right direction is greater than the length of the opening in the left and right direction of the stir welding stationary shoulder 5. This allows for fine-tuning of the position of the limiting seat 1 in the left and right direction, so that the measuring head of the dial indicator 2 can abut against the end of the stir welding stationary shoulder 5 and the tip of the stirring needle 4, respectively.

[0039] The length of the first rectangular notch 13 in the left-right direction is less than the inner diameter of the lower end face of the stirring pin locking nut 3. This facilitates its contact with the lower end face of the stirring pin locking nut 3. The length of the limiting shoulder in the left-right direction is greater than half the difference between the inner and outer diameters of the lower end face of the stirring pin locking nut.

[0040] The length of the shoulder in the front-back direction is greater than its length in the left-right direction.

[0041] When the measuring head of dial indicator 2 abuts against the lower end face of the stationary shoulder 5 of the stir welding shaft, the tops of the two limiting shoulders 12 abut against the lower end face of the stirring pin locking nut 3. See [reference needed]. Figure 6 When the measuring head of the dial indicator 2 abuts against the tip of the stirring needle 4, the tops of the two limiting shoulders 12 abut against the lower end face of the stirring needle locking nut 3. See also Figure 4 .

[0042] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A measuring device for measuring the length of the stirring pin in a stationary shoulder stir welding process, comprising a dial indicator, characterized in that, It also includes a limiting seat; The limiting seat includes a mounting part, on which a mounting hole is provided for inserting a fixing rod of a dial indicator. The limiting seat and the fixing rod are fixed by a locking screw. The limiting seat also includes two limiting shoulders located on both sides of the mounting portion, and the gap between the two limiting shoulders is used to accommodate the stationary shaft shoulder of the stir welding. One end of the limiting shoulder is a positioning surface used to abut against the lower end face of the stirring needle locking nut; The other end of the limiting shoulder is fixedly connected to the mounting part.

2. The measuring device for measuring the length of the stirring pin in a stationary shoulder stir welding according to claim 1, characterized in that: The gap between the two limiting shoulders includes a first rectangular notch, a trapezoidal notch that is wider at the top and narrower at the bottom, and a second rectangular notch arranged sequentially from top to bottom; The first rectangular notch, the trapezoidal notch, and the second rectangular notch are interconnected; The length of the first rectangular notch in the left-right direction is greater than the length of the second rectangular notch in the left-right direction; The first rectangular notch is used to accommodate the stir weld stationary shoulder.

3. The measuring device for measuring the length of the stirring pin in a stationary shoulder stir welding according to claim 2, characterized in that: The stir welding stationary shoulder has an internal and external through opening on its left and right opposite sides. The length of the first rectangular notch in the left-right direction is greater than the length of the opening in the left-right direction of the static shoulder of the stir welding.

4. The measuring device for measuring the length of the stirring pin in a stationary shoulder stir welding according to claim 2, characterized in that: The length of the first rectangular notch in the left-right direction is less than the inner diameter of the lower end face of the stirring needle locking nut.

5. The measuring device for measuring the length of the stirring pin in a stationary shoulder stir welding process according to claim 1, characterized in that: The length of the limiting shoulder in the left-right direction is greater than half the difference between the inner and outer diameters of the lower end face of the stirring needle locking nut.

6. The measuring device for measuring the length of the stirring pin in a stationary shoulder stir welding according to claim 1, characterized in that: The left and right sides of the two limiting shoulders are flush with the left and right sides of the mounting part, respectively.

7. The measuring device for measuring the length of the stirring pin in a stationary shoulder stir welding according to claim 1, characterized in that: When the measuring head of the dial indicator abuts against the lower end face of the stationary shoulder of the stirring weld, the top of the two limiting shoulders abuts against the lower end face of the stirring needle locking nut. When the measuring head of the dial indicator comes into contact with the tip of the stirring needle, the tops of the two limiting shoulders come into contact with the lower end face of the locking nut of the stirring needle.

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