Composite soldering tin bar rounding forming jig

Abstract

The invention discloses a soldering tin bar rounding forming jig, and relates to the field of bending forming machining, the jig comprises a positioning base, a lower die holder, a positioning module and a negative pressure suction upper module; the lower die holder is formed by assembling a pressure-bearing seat, a baffle plate, left and right bidirectional clamping arms, a micro tension spring, a pin and a screw; the upper module is composed of a negative pressure suction punch and a clamping handle. The device is suitable for the production operation of wrapping the soldering tin bar on an outer circle in a circle.

Description

Technical Field

[0001] This invention belongs to the technical field of solder bar or other metal bar forming jigs, specifically a jig for shaping solder bars into rings and wrapping them around workpieces. Background Technology

[0002] Solder bars are commonly used materials in industry, primarily for welding. Traditional solder bar manufacturing methods typically involve extruding solder rods into long strips, and then cutting these strips into segments to produce finished products. However, in actual use, solder bars often need to be shaped into specific forms for ease of use, such as rings or rhombuses. Traditional manual shaping methods struggle to ensure consistent solder ring dimensions, easily leading to issues like diameter deviations and substandard roundness. This can cause uneven solder distribution and other quality problems during the welding of precision components.

[0003] Therefore, in order to solve these problems, it is of great practical significance and application value to develop a new type of solder bar rounding forming fixture to achieve efficient and precise rounding processing. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a composite solder bar round forming fixture, which includes a positioning base, a lower mold base, a micro tension spring, left and right bidirectional clamping arms, a positioning module, and a negative pressure suction module.

[0005] The positioning base has a coaxial positioning column to achieve coaxiality between the upper and lower molds. The upper end of the positioning base has a central column and is press-fitted with the lower mold base.

[0006] The lower mold base includes a vertically aligned base at its bottom, co-centered with the positioning base. The lower mold base has a bending groove, and its top has a positioning platform. Operators can use the positioning platform to match the solder strip for rapid positioning. A semi-circular groove at the upper end of the lower mold base accommodates the diameter of the workpiece. Two sizes of pin holes are provided on both sides of the lower mold base for eight pins on each side. Threaded holes are provided at both ends of the lower mold base for fixing blocks and restricting pin movement.

[0007] The pins are provided in two specifications. The eight pins located on both sides of the lower mold base are used to fix four miniature tension springs. The other specification of pins is located inside the left and right clamping arms and is used to limit the radial degree of freedom of the left and right clamping arms.

[0008] The right clamping arm is fixed to the bending grooves on both sides of the lower mold base by the pin, achieving radial rotation and retraction. The upper end of the right clamping arm is provided with a square groove for quickly placing solder bars.

[0009] The left clamping arm is fixed to the bent grooves on both sides of the lower mold base by the pin, which enables radial rotation and retraction. The upper end of the right clamping arm is provided with a square groove for quickly placing solder bars.

[0010] The stop block is provided with a countersunk hole, and the stop block is fixed to both sides of the lower mold base with screws to limit the axial displacement of the left and right clamping walls.

[0011] The miniature tension springs are mounted on pins on both sides of the lower mold base to enable the automatic reset of the left and right clamping arms after the process is completed.

[0012] The lower end of the negative pressure suction mold is provided with an opening for ventilation. The lower end of the negative pressure suction mold is provided with left and right steps to limit the axial degree of freedom of the workpiece, so as to achieve accurate and repeatable positioning.

[0013] The beneficial effects of this invention are as follows: Compared with the prior art, this invention provides a fixture and process method for forming a solder bar in a round shape, which has the following advantages:

[0014] Coaxial positioning function: ensures that the upper and lower molds are concentric, guaranteeing product quality;

[0015] Upper mold negative pressure suction function: can limit the outer shell, ensuring that the solder bar is accurately wrapped on the solder groove of the outer shell and ensuring batch consistency;

[0016] Left and right bidirectional clamping arms: While pressing down the upper mold, the four bidirectional clamping arms can wrap around the outer circle of the shell to shape the solder bar into a ring and wrap it in the solder groove of the shell.

[0017] Cutting function: While the four clamping arms round the solder bar, the sharp corners on the clamping arms will cut off the excess solder to ensure that the solder is round. Attached Figure Description

[0018] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. In the drawings, embodiments of the invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of a composite solder bar round forming fixture according to the present invention;

[0020] Figure 2 This is an enlarged schematic diagram of the key structure of the present invention, showing the solder being gathered into a circle.

[0021] Explanation of reference numerals in the attached figures

[0022] 1. Positioning base; 2. Lower mold base; 3. Stop block; 4. Pin; 5. Right clamping arm; 6. Left clamping arm; 7. Negative pressure suction upper mold; 8. Workpiece part; 9. Solder bar; 10. Miniature tension spring; 11. Fastening bolt. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] This invention discloses a composite solder bar rounding forming fixture 1, comprising a positioning base 2, a lower mold base 3, a stop block 4, a pin 5, a right clamping arm 6, a left clamping arm 7, a negative pressure suction upper mold 8, a workpiece part 9, a solder bar 10, a miniature tension spring, and fastening bolts 11. To round the solder bar 9 within the groove of the workpiece 8, the right clamping arm 6 and the left clamping arm 7, fixed on both sides of the lower mold base 2, perform a rounding operation with the workpiece 8 as the center, ensuring that the solder bar 9 adheres to the outer circumference of the workpiece 8. Simultaneously, after the right clamping arm 6 and the left clamping arm 7 close, their upper sharp corners automatically trim excess solder bar 9, ensuring that the circumference of the solder bar 9 perfectly matches the outer circumference requirement of the workpiece 8. After the solder bar 9 rounds the outer circumference of the workpiece 8, the right clamping arm 6 and the left clamping arm 7 automatically reset under the tension of the miniature tension spring 10, preparing for the next processing step.

[0025] The operation method for forming the solder bar into a round shape is as follows:

[0026] 1) Assemble the positioning base and lower die base onto the universal base of the high-precision hand-operated press. Assemble the negative pressure suction upper die onto the stamping position of the hand-operated press. Adjust the appropriate pressing height and ensure that the upper and lower dies are concentric to ensure that other structural parts are not damaged during pressing.

[0027] 2) Place the solder bar in the groove provided in the lower mold base and push it onto the positioning block to ensure that the force on the left and right sides is even when pressing down.

[0028] 3) Place the workpiece on the negative pressure suction mold. The upper mold will use the negative pressure suction function to pick up the workpiece and limit its axial freedom, so as to ensure that the solder bar is in the ideal position on the workpiece after it is rounded.

[0029] 4) Press down the high-precision hand-operated press handle, and use the left and right bidirectional clamping arms to form the solder bar into a circle and wrap it around the outer circle of the workpiece. Then, press up the handle, and the workpiece will be sucked up by the negative pressure and leave the lower mold mechanism. The workpiece can then be manually removed to complete the processing.

Claims

1. A solder bar rounding forming fixture, characterized in that, The fixture includes a base, a lower mold base, a positioning module, and a negative pressure suction module; the lower mold base is assembled from a pressure bearing seat, a baffle, left and right bidirectional clamping arms, a micro tension spring, pins, and screws; the upper module consists of a negative pressure suction punch and a clamping handle.

2. The solder bar rounding forming fixture according to claim 1, characterized in that, The pressure seat has the function of limiting the left and right bidirectional clamping arms, and the left and right bidirectional clamping arms are made of mold steel.

3. The solder bar rounding forming fixture according to claim 1, characterized in that, The number of miniature tension springs is 4.

4. The solder bar rounding forming fixture according to claim 1, characterized in that, The upper mold has a limiting function to ensure that the solder bar is always wound in the same position.

5. The solder bar rounding forming fixture according to claim 1, characterized in that, The left and right bidirectional clamping arms have a cutting function that can cut off excess solder strips to ensure that the shape is a complete circle.

6. A solder bar rounding forming fixture as described in any one of claims 1 to 5, characterized in that, The molding method is as follows: The solder bar is placed in the special square groove of the upper die base. The workpiece is adsorbed onto the punch of the upper die by the negative pressure suction device. Press down the hand lever press. Under the downward force and the action of the bidirectional clamping arm, the solder will bend and wrap around the solder groove of the workpiece. At the same time, the bidirectional clamping arm will close together to cut off the excess solder bar to ensure that the final solder ring is a complete circle.

7. The solder bar rounding forming fixture as described in claim 6, characterized in that, The above includes all connectors that require soldering after being wrapped with solder strips, such as SSMP, SMP, etc.

Images