Welding hole site measuring device

Abstract

The utility model relates to the field of hole site measurement, and discloses a welding hole site measuring device, an upper fixing disc is arranged above a lower fixing disc, three groups of connecting rods which are annularly distributed are arranged on the surface of the outer ring of the upper fixing disc and the surface of the outer ring of the lower fixing disc, a lifting rod is arranged at the center of the upper fixing disc and the center of the lower fixing disc in an up-and-down lifting mode, and the lifting rod is connected with the upper fixing disc and the lower fixing disc. Three sets of evenly-distributed deflection rods are rotatably installed on the surface of the outer ring of the lifting rod through shaft pins, positioning rods are vertically and slidably arranged in movable sliding holes, the upper portions of the positioning rods are rotatably connected with the lower ends of the deflection rods through shaft pins, and the three sets of linearly-moving positioning rods are arranged on the lower fixing disc. The lifting rod, the screw rod and the positioning rod which are arranged in a matched mode can move along a straight line, the lower end of the positioning rod can abut against the inner wall of the hole site, the lifting rod is located in the center of the positioning rod, it can be guaranteed that the distances between three measuring points and the center of the hole site are consistent, and the measuring precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hole position measurement field especially relates to a welding hole position measurement device. BACKGROUND

[0002] Some welding workpieces need to be detected before installation after processing, such as the hole position of parts, and the hole position detection is a process means for the position or size of the hole position on the product, which is the guarantee of the quality of the product hole position, and the position deviation of the hole position needs to meet the corresponding standard.

[0003] The current position measurement method generally includes three kinds: three-point measurement method, laser measurement and camera measurement, wherein the three-point measurement method is the most convenient, three equidistant measurement points are selected on the periphery of the hole position, and the distances between the three measurement points and the edge of the hole position are measured by the electronic digital caliper, and then the position deviation value can be calculated according to the formula.

[0004] In this way, the center position of the hole cannot be guaranteed, that is, the distances between the three measurement points and the center of the hole position cannot be guaranteed when selecting the measurement points, so that the value has error in the rear measurement. Therefore, we design a welding hole position measurement device. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the technical problem that the center position of the hole cannot be guaranteed, that is, the distances between the three measurement points and the center of the hole position cannot be guaranteed when selecting the measurement points, the utility model provides a welding hole position measurement device.

[0006] The utility model adopts the following technical scheme: a welding hole position measurement device, including lower fixed disc, the upper of lower fixed disc is provided with upper fixed disc, the upper fixed disc and lower fixed disc outer circle surface thing is provided with three groups of annular distribution's connecting rod, the upper fixed disc, lower fixed disc center place goes up and down lift formula and is provided with the lifting rod of the lower fixed disc, the outer circle surface of lifting rod is rotationally installed with three groups of even distribution's deflection rod through the shaft pin,

[0007] Three groups of annular distribution's movement sliding hole are set up on the upper of lower fixed disc, the vertical and sliding setting of movement sliding hole is provided with the positioning rod, the upper of positioning rod is rotationally connected with the lower end of deflection rod through the shaft pin.

[0008] As a further improvement of the above scheme, the nut seat is rotatably installed at the center of the upper fixing disc through a bearing, the upper end of the lifting rod is provided with a screw rod, the screw rod is in threaded connection with the nut seat, and a wrench is further arranged on the nut seat, the nut seat can be rotated by rotating the wrench, the screw rod can be moved up and down, the lifting rod can be moved up and down together, and the deflection rod can be unfolded or contracted, so that the three positioning rods are unfolded or contracted synchronously.

[0009] As a further improvement of the above scheme, the upper surface of the lower fixing disc is provided with three groups of uniformly distributed guide sliding grooves, and the three guide sliding grooves correspond to the three groups of moving sliding holes respectively, the cross section of the guide sliding groove is in a convex character structure, the positioning rod is sleeved with a sliding block, and the sliding block is slidably arranged in the guide sliding groove, so that the up and down movement of the positioning rod is limited, and the positioning rod can only move linearly inward or outward.

[0010] As a further improvement of the above scheme, the bottom end of the positioning rod is provided with an abutting head, the lower half of the abutting head is vertically arranged downward, and the upper half of the abutting head is curved and connected with the positioning rod, the abutting head can move horizontally inward or outward, and then can be in contact with the inner wall of the hole position, so that the three claw positioning is realized, the axis of the lifting rod is collinear with the axis of the hole position, and the upper half of the abutting head is curved, so that the lower half of the abutting head is retracted inward by a certain distance, the lower halves of the three abutting heads can coincide with each other, and the distance between them is reduced, and it is suitable for smaller size hole positions.

[0011] As a further improvement of the above scheme, the lower end of the connecting rod is curved outward to form an abutting foot, the lower half of the abutting foot is vertically arranged downward, the abutting foot is used for being fixed above the workpiece, and the abutting foot is perpendicular to the workpiece.

[0012] As a further improvement of the above scheme, the lower half of the abutting foot is arranged in parallel with the lower half of the abutting head, and the bottom end of the abutting head is below the abutting foot, when the abutting foot is arranged above the workpiece, the abutting head can be arranged in the hole position and in contact with the inner wall of the hole position, so that the connecting rod is arranged above the hole position.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] 1、The utility model discloses a three -pronged positioning device for hole position, including lower fixing disc, three groups of positioning rods, lifting rod, screw rod and deflection rod, the lower fixing disc is arranged on the workpiece, the three groups of positioning rods are arranged on the lower fixing disc, the lifting rod is arranged on the three groups of positioning rods, the screw rod is arranged on the lifting rod, and the deflection rod is arranged on the lifting rod.

[0015] 2. The positioning rod can move linearly under the action of the lifting rod and the deflection plate, making it suitable for measuring holes of various sizes. The overall structure is simple and easy to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a welding hole position measuring device provided by the utility model;

[0017] Figure 2 for Figure 1 Isometric drawing of

[0018] Figure 3 for Figure 1 Front view of

[0019] Figure 4 for Figure 1 Schematic cross-section diagram in .

[0020] Description of main symbols:

[0021] 1. Lower fixed plate; 11. Guide slide; 12. Moving slide hole; 2. Lifting rod; 21. Screw rod; 3. Positioning rod; 31. Abutment; 4. Deflection rod; 5. Upper fixed plate; 51. Nut seat; 6. Connecting rod; 61. Abutment foot. DETAILED DESCRIPTION

[0022] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] Example:

[0024] Please combine Figures 1-4 A welding hole position measuring device includes a lower fixed plate 1, an upper fixed plate 5 is arranged above the lower fixed plate 1, and three groups of connecting rods 6 are arranged on the outer surface of the upper fixed plate 5 and the lower fixed plate 1. A lifting rod 2 is arranged at the center of the upper fixed plate 5 and the lower fixed plate 1 in an upward and downward manner. Three groups of evenly distributed deflection rods 4 are installed on the outer surface of the lifting rod 2 for rotation via an axle pin;

[0025] Three groups of circularly distributed movable sliding holes 12 are provided above the lower fixed plate 1. Positioning rods 3 are vertically and slidably provided in the movable sliding holes 12. The upper part of the positioning rod 3 is rotatably connected to the lower end of the deflection rod 4 through an axle pin.

[0026] A nut seat 51 is rotatably installed at the center of the upper fixed disc 5 through a bearing, the upper end of the lifting rod 2 is provided with a screw rod 21, the screw rod 21 is threadedly connected with the nut seat 51, and a wrench is further arranged on the nut seat 51, the nut seat 51 can be rotated by rotating the wrench, the screw rod 21 can be moved up and down, the lifting rod 2 can be moved up and down together, and the deflection rod 4 can be unfolded or contracted, so that the three positioning rods 3 are synchronously unfolded or contracted.

[0027] Three groups of guide sliding grooves 11 are arranged on the upper surface of the lower fixed disc 1, and the three guide sliding grooves 11 correspond to the three groups of moving sliding holes 12 respectively, the cross section of the guide sliding groove 11 is in a convex structure, a sliding block is sleeved on the positioning rod 3, and the sliding block is slidably arranged in the guide sliding groove 11, so that the up and down movement of the positioning rod 3 is limited, and the positioning rod 3 can only move linearly inward or outward.

[0028] The bottom end of the positioning rod 3 is provided with an abutting head 31, the lower half of the abutting head 31 is vertically arranged downward, the upper half of the abutting head 31 is curved and connected with the positioning rod 3, the abutting head 31 can be moved horizontally inward or outward, and then can be in contact with the inner wall of the hole position, so that the three-jaw positioning is realized, the axis of the lifting rod 2 is collinear with the axis of the hole position, and the upper half is designed to be curved, so that the lower half of the abutting head 31 is inwardly contracted by a certain distance, the lower halves of the three abutting heads 31 can be overlapped with each other, and the distance between them is reduced, which is suitable for smaller size hole positions.

[0029] The lower end of the connecting rod 6 is curved outward to form an abutting foot 61, the lower half of the abutting foot 61 is vertically arranged downward, the abutting foot 61 is used for being fixed above the workpiece, and is perpendicular to the workpiece.

[0030] The lower half of the abutting foot 61 is arranged in parallel with the lower half of the abutting head 31, and the bottom end of the abutting head 31 is below the abutting foot 61, when the abutting foot 61 is arranged above the workpiece, the abutting head 31 can be in the hole position and in contact with the inner wall thereof, so that the connecting rod 6 is above the hole position.

[0031] The implementation principle of the welding hole measuring device in the embodiment of the application is that, in actual use, the device is arranged above the workpiece and the three abutting heads 31 are arranged in the hole positions of the workpiece, then the nut seat 51 is rotated clockwise, the screw rod 21 and the lifting rod 2 can only be linearly displaced under the action of the guide sliding groove 11 and the sliding block, which makes the lifting rod 2 and the screw rod 21 move downward, so that the three deflection rods 4 are unfolded outward, the three deflection rods 4 make the three positioning rods 3 move outward synchronously, until the outward side surface of the three abutting heads 31 abuts against the inner wall of the hole position of the workpiece, and the axis of the lifting rod 2 is collinear with the axis of the hole position.

[0032] Draw a circle of arbitrary size on the workpiece with the lifting rod 2 as the axis, randomly select three points on the circle and measure the straight-line distance between these points and the edge of the hole. Then calculate the position deviation value of the hole according to the formula (Pt1+Pt2+Pt3) / 3-D / 2, where Pt1, Pt2, and Pt3 are the distances from the three measuring points to the edge of the hole, and D is the diameter of the hole.

[0033] By arranging three sets of linearly movable positioning rods 3 on the lower fixed plate 1, in conjunction with the lifting rods 2 and the screw rod 21, the positioning rods 3 can move along a straight line, so that the lower ends of the positioning rods 3 can contact the inner wall of the hole, so that the lifting rods 2 are at the center, which can ensure that the distances between the three measuring points and the center of the hole are consistent, thereby improving the measurement accuracy;

[0034] The positioning rod 3 can move linearly under the action of the lifting rod 2 and the deflection plate, making it suitable for measuring holes of various sizes. The overall structure is simple and easy to move.

[0035] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A welding hole position measuring device, comprising a lower fixed plate (1), characterized in that: An upper fixed plate (5) is provided above the lower fixed plate (1), and three groups of connecting rods (6) distributed in an annular shape are provided between the outer ring surfaces of the upper fixed plate (5) and the lower fixed plate (1). A lifting rod (2) is provided at the center of the upper fixed plate (5) and the lower fixed plate (1) in an upward and downward manner, and three groups of evenly distributed deflection rods (4) are rotatably installed on the outer ring surface of the lifting rod (2) through an axle pin; Three groups of circularly distributed movable sliding holes (12) are provided above the lower fixed plate (1), and a positioning rod (3) is vertically and slidably provided in the movable sliding hole (12). The upper end of the positioning rod (3) is rotatably connected to the lower end of the deflection rod (4) through an axle pin.

2. A welding hole position measuring device according to claim 1, characterized in that: A nut seat (51) is rotatably mounted at the center of the upper fixed plate (5) via a bearing. A screw rod (21) is provided at the upper end of the lifting rod (2). The screw rod (21) is threadedly connected to the nut seat (51), and a wrench is also provided on the nut seat (51).

3. A welding hole position measuring device according to claim 1, characterized in that: The upper surface of the lower fixed plate (1) is provided with three groups of evenly distributed guide grooves (11), and the three guide grooves (11) correspond to the three groups of movable sliding holes (12) respectively. The cross section of the guide grooves (11) is a convex structure. A sliding block is sleeved on the positioning rod (3), and the sliding block is slidably placed in the guide grooves (11).

4. A welding hole position measuring device according to claim 1, characterized in that: The bottom end of the positioning rod (3) is provided with an abutment joint (31), the lower half of the abutment joint (31) is vertically arranged downward, and the upper half of the abutment joint (31) is bent and connected to the positioning rod (3).

5. A welding hole position measuring device according to claim 4, characterized in that: The lower end of the connecting rod (6) is bent outward to form an abutting foot (61), and the lower half of the abutting foot (61) is arranged vertically downward.

6. A welding hole position measuring device according to claim 5, characterized in that: The lower half of the abutting foot (61) is arranged in parallel with the lower half of the abutting head (31), and the bottom end of the abutting head (31) is located below the abutting foot (61).

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