Welding positioning assistive device for spherical crown piece

Abstract

The welding positioning assistive device comprises a square seat, a bridge plate is erected above the square seat, the upper portion of a screw shaft is fixed to the bridge plate, a crown seat and a crown body can be placed on the square seat and positioned by the square seat, and an annular drilling plate used for positioning the drilling position of the crown seat is further arranged on the square seat. The auxiliary tool can be used for welding large components which are used in mechanical engineering and are high in use frequency, the screw shaft can be machined into a finished product, and the use of a large lathe is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical product welding assistance, and in particular relates to a welding positioning aid for a spherical crown. Background Art

[0002] A component structure for a sealed product that is used many times and frequently, needs to be frequently opened and closed, and needs to be flexible to open. The physical space and geometric position of the ball cap used in the component structure of the sealed product in the sealed product structure require high accuracy during installation.

[0003] The spherical crown is composed of a crown seat 1, a crown body 2, a bushing 3 and a screw shaft 4. The relevant dimensions of the combination of the crown seat 1 and the crown body 2 are made as required, the bushing 3 is set at the center of the crown body 2, and the bushing 3 is welded to the corresponding part of the crown body 2. After the screw shaft 4 is press-fitted with the bushing 3, the corresponding parts also need to be welded. Some deformation will occur during welding, resulting in the position offset of the screw shaft 4. Since the spherical crown is large in shape and heavy as a whole, it is frequently switched on and off during use, in order to overcome the fall caused by the weight of the component structure itself. The physical space and geometric position of the spherical crown must be reasonably arranged in the component structure of the closed body, and the accuracy must be within the preset range. One solution is to weld the bushing 3 with the crown body 2 with a blank, and then bore the inner hole that matches the screw shaft 4. The inner hole can be made into a screw hole as required, and the corresponding part of the screw shaft 4 is made into an external thread. Another solution is to leave a margin for the functional size of the screw shaft 4, and after welding, use the crown seat 1 and the crown body 2 to position and cut to meet the requirements of the drawing. Both solutions require the use of large special machine tools, which have high technical requirements for operators, and it is difficult to protect the surface of the screw shaft 4. The group of holes on the crown seat 1 required to realize the next function of the ball crown piece, if configured, the position requirements are difficult to accurately guarantee. Summary of the invention

[0004] Purpose of the Invention

[0005] In order to solve the above technical problems, the present invention provides a welding positioning aid for a spherical crown.

[0006] Inventing technical solutions

[0007] A welding positioning aid for a spherical crown comprises a square seat, a bridge plate is erected above the square seat, the upper part of a screw shaft is fixed on the bridge plate, the crown seat and the crown body can be placed on the square seat and positioned by the square seat, and an annular drilling plate is also arranged on the square seat for positioning the drilling position of the crown seat.

[0008] Preferably, a cylindrical pin and a diamond pin are arranged on the square seat, and the two ends of the bridge plate are respectively fixed on the upper part of the cylindrical pin and the diamond pin.

[0009] Preferably, the annular drill plate is fixed on the cylindrical pins and the diamond pins.

[0010] Preferably, the top surface of the square seat has an annular groove capable of positioning the outer diameter of the crown seat and an arc surface capable of supporting the outer edge of the bottom surface of the crown body.

[0011] Preferably, a centering bushing is provided between the bridge plate and the screw shaft, and a handle is provided on the centering bushing.

[0012] Preferably, it also includes a direction key with one end fixed on the bridge plate, and the other end of the direction key cooperates with the keyway on the screw shaft.

[0013] Preferably, a plurality of fixed drill sleeves are provided on the annular drill plate.

[0014] Preferably, a plurality of hanging rings are provided on the square base.

[0015] Preferably, a plurality of lifting rings are provided on the bridge deck.

[0016] Preferably, a plurality of weight-reducing grooves are provided on the square base.

[0017] The invention has the advantages that the auxiliary tool can be used to weld large components with high frequency of use in mechanical engineering, and the screw shaft can be processed into a finished product, avoiding the use of a large lathe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a structural diagram of a welding positioning aid for a spherical crown.

[0019] Figure 2 yes Figure 1 AA section view.

[0020] Figure 3 yes Figure 2 Half-section view of BB.

[0021] Figure 4 yes Figure 1 CC rotated section view.

[0022] Figure 5 It is a three-dimensional diagram of a welding positioning aid for a spherical crown of the present invention.

[0023] In the figure, 1 is the crown seat, 2 is the crown body, 3 is the bushing, 4 is the screw shaft, 5 is the square seat, 6 is the annular drill plate, 7 is the cylindrical pin, 8 is the bushing, 9 is the lifting ring, 10 is the centering bushing, 11 is the bushing, 12 is the diamond pin, 13 is the bridge plate, 14 is the handle, 15 is the fixed drill sleeve, and 16 is the direction key. DETAILED DESCRIPTION

[0024] The present invention is achieved through the following technical solutions.

[0025] A welding positioning aid for a spherical crown, comprising a square seat 5, a crown seat 1 and a crown body 2 are positioned inside the square seat 5 by the outer arc of the crown body 2, a large outer circle and a step are provided on the crown seat 1, and a positioning part is reversely dug out on the square seat 5, and a bridge plate 13 is bridged on the square seat 5 at both ends by a large cylindrical pin 7 and a diamond pin 12. A centering bushing 10 with a handle 14 is sleeved on the outer circle of the screw shaft 4 for main positioning. The bushing 3 and the crown body 2 are welded, and the screw shaft 4 and the bushing 3 are welded, and the direction keyway of the screw shaft 4 forms a corresponding position relationship with the multiple groups of holes to be drilled on the crown seat 1, so that accurate positioning can be achieved. The bridge plate 13 is provided with a direction key to clamp the position of the installation key on the screw shaft 4, and multiple fixed drill sleeves 15 provided on the annular drill plate 6 can be used to guide the drilling of a group of holes in the crown seat 1. The cylindrical pin 7 and the diamond pin 12 are arranged on the square seat 5, and the bridge plate 13 with bushings 11 of different diameters is mounted on the cylindrical pin 7 and the diamond pin 12. The screw shaft 4 is fixed at the center of the bridge plate 13. In order to facilitate the removal of the parts, a centering bushing 10 with a handle 14 is provided to fix the screw shaft 4, and the keyway on the screw shaft 4 is inserted by the direction key 16. The direction key 16 is positioned by the square through hole set on the bridge plate 13, and can accurately achieve the positional relationship with the multiple groups of holes of the crown seat 1. The part for drilling and installing multiple groups of holes of other functional components is composed of the bridge plate 13 and the fixed drill sleeve 15, which can quickly guide the drilling of multiple groups of holes.

[0026] The crown seat 1 and the crown body 2 can be processed as a whole. If the crown seat 1 and the crown body 2 need to be welded as a whole, the clamp can also be used. The screw shaft 4 can be connected with the bushing 3 by press fit, or it can be connected by thread fit. The screw shaft 4 is provided with a square keyway and T-shaped thread used by the subsequent ball crown. The multiple groups of holes provided on the crown seat 1 are used to install related functional components, and the physical space and geometric space positions are correct and within the preset range. In order to reduce welding deformation, two weldings are used. After positioning, spot welding is performed at a few places, and then full welding is performed after stabilization. The ball crown is removed after sufficient time. The multiple fixed drill sleeves 15 provided on the annular drill plate 6 can lead to drill a group of holes in the crown seat 1. After multiple lightening grooves are provided on the square seat 5, it is easier to hoist the overall auxiliary tool with the lifting ring 9, reducing the difficulty of operation. The auxiliary tool can weld large components with high frequency of use in mechanical engineering, and the screw shaft 4 can be processed into a finished product, avoiding the use of a large lathe. By setting the corresponding fixed drill sleeve 15 on the annular drill plate 6, 4, 8 or 12 groups of holes can be drilled synchronously, and the corresponding position relationship is accurate, providing a feasible welding positioning solution with higher production efficiency for the factory.

[0027] The use example of this auxiliary tool: hoist the crown seat 1 and the crown body 2, install the crown seat 1 with its outer diameter positioned on the square seat 5, place the bushing 3 at the center of the crown body 2, hoist the bridge plate 13, and position one end of the screw shaft 4 in the central inner hole of the bushing 3. The centering bushing 10 with the handle 14 fixes the other end of the screw shaft 4, and rotates the screw shaft 4 so that the keyway on it can be inserted by the direction key 16, and the corresponding position relationship is accurate. Spot welding Figure 2The places to be welded are fully welded after sufficient cooling time. The whole part is hoisted to the drilling machine and the relevant holes are drilled.

[0028] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable technicians familiar with the technical field to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit and essence of the present invention should be included in the protection scope of the present invention. The technology, shape, and structure parts not described in detail in the present invention are all well-known technologies.

Claims

1. A welding positioning aid for a spherical cap. It is characterized in that The invention comprises a square seat (5), a bridge plate (13) is mounted on the square seat (5), the upper part of the screw shaft (4) is fixed on the bridge plate (13), the crown seat (1) and the crown body (2) can be placed on the square seat (5) and positioned by the square seat (5), and the square seat (5) is also provided with an annular drilling plate (6) for positioning the drilling position of the crown seat (1).

2. A welding positioning aid for a spherical cap as claimed in claim 1, It is characterized in that A cylindrical pin (7) and a diamond pin (12) are arranged on the square seat (5), and two ends of the bridge plate (13) are respectively fixed on the upper parts of the cylindrical pin (7) and the diamond pin (12).

3. A welding positioning aid for a spherical cap as claimed in claim 2, It is characterized in that The annular drill plate (6) is fixed on the cylindrical pin (7) and the diamond pin (12).

4. A welding positioning aid for a spherical cap as claimed in claim 1, It is characterized in that The top surface of the square seat (5) has an annular groove capable of positioning the outer diameter of the crown seat (1) and an arc surface capable of supporting the outer edge of the bottom surface of the crown body (2).

5. A welding positioning aid for a spherical cap as claimed in claim 4, It is characterized in that A centering bushing (10) is arranged between the bridge plate (13) and the screw shaft (4), and a handle (14) is provided on the centering bushing (10).

6. A welding positioning aid for a spherical cap as claimed in claim 4, It is characterized in that It also includes a direction key (16) with one end fixed on the bridge plate (13), and the other end of the direction key (16) is matched with a keyway on the screw shaft (4).

7. A welding positioning aid for a spherical cap as claimed in claim 1, It is characterized in that A plurality of fixed drill sleeves (15) are arranged on the annular drill plate (6).

8. A welding positioning aid for a spherical cap as claimed in claim 1, It is characterized in that A plurality of lifting rings are arranged on the square base (5).

9. A welding positioning aid for a spherical cap as claimed in claim 1, It is characterized in that A plurality of lifting rings are arranged on the bridge plate (13).

10. A welding positioning aid for a spherical cap as claimed in claim 1, It is characterized in that A plurality of weight-reducing grooves are arranged on the square base (5).

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