Shaping tool for cylindrical product

Abstract

The shaping tool for the cylindrical product comprises a left ring and a right ring which can be spliced to form a circular ring, a plurality of through holes are distributed in the left ring and the right ring, and copper blocks capable of sliding in the radial direction of the circular ring are arranged in the through holes. The shaping bolts extend into the through holes from the outer ends of the through holes to push the copper blocks to move towards the inner side in the radial direction so as to adjust the shaping amount, and the inner ends of the copper blocks make contact with the outer wall of the product to be shaped and extrude the product to be shaped to deform the product. The through holes are formed in the circular ring structure, and the copper blocks in the through holes are pushed by controlling the depth of the shaping bolts, so that the shaping force applied to the outer wall of the part in the ring is accurately adjusted, the shaping of the circular part becomes convenient and rapid, the operation is simple, and the disassembly and assembly are convenient.

Description

Technical Field

[0001] This utility model relates to a shaping tool for mechanical parts, specifically a shaping fixture for cylindrical products. Background Technology

[0002] Currently, circular products, especially cylindrical parts, inevitably deform due to internal stress. Shaping these products can rely on rounding equipment; specifically, the product to be shaped is placed on the rounding equipment, and the shaping is achieved by re-rounding or correction. However, dedicated rounding equipment is suitable for mass production, but it is expensive, and multiple shaping and correction processes consume a lot of time; furthermore, the deformation of the shaped product may not be sustainable for a long time. For small batches of parts to be shaped, easy-to-operate, low-cost, and high-precision shaping products can well meet the requirements for rapid and accurate rounding.

[0003] Patent CN 211564101U discloses a cylindrical inner circle shaping fixture, in which several support rods are radially fixed on the inner circle support, and each support rod is provided with a movable sleeve. A limiting component for fixing the two is provided between the movable sleeve and the support rod. An adjusting screw is movably installed at the end of the movable sleeve, and a large nut is fixed at the end of the adjusting screw.

[0004] According to data from an embodiment of this solution, it is very effective in shaping large-diameter cylindrical bodies (such as large pipes). However, it has several shortcomings in shaping small cylindrical products: there is a lower limit to the diameter of the inner circle support; if the diameter is too small, it will be impossible to set a sufficient number of support rods, making it difficult to control the precision of the circular shaping. This solution requires the tooling to be placed inside the cylinder for operation; if there are other structures inside the cylinder, it cannot be used. Furthermore, after placing the tooling, if the diameter of the cylindrical product is too small, rotating the adjusting screw from the inside during operation becomes extremely inconvenient, requiring the use of other tools. Summary of the Invention

[0005] This invention aims to address the problems of existing rounding equipment, such as high cost, long working hours, and low precision, by providing a shaping fixture for cylindrical products.

[0006] To achieve the above objectives, the technical solution adopted by this utility model includes a left ring and a right ring that can be spliced ​​to form a circular ring; several through holes are distributed on the left ring and the right ring, and copper blocks that can slide radially along the circular ring are provided in the through holes; shaping bolts extend into the outer end of the through holes respectively, pushing the copper blocks to move radially inward, and adjusting the depth of each shaping bolt to adjust the amount of shaping, so that the inner end of the copper block contacts and squeezes the outer wall of the product to be shaped, causing it to deform.

[0007] The outer wall of the copper block is connected to the inner wall of the through hole by a spring.

[0008] The outer wall of the outer section of the copper block is provided with an outward protruding step, and the inner wall of the inner end of the through hole is provided with an inward concave step; the two ends of the spring are respectively connected to the outward protruding step and the inward concave step.

[0009] The left and right rings are both semi-circular rings with the same inner diameter.

[0010] The left and right rings are connected by threaded holes at their two joints. A connecting bolt is inserted into the mating threaded holes to form a complete ring.

[0011] The inner wall of the through hole is provided with internal threads, which mate with the external threads on the outer wall of the shaping bolt to fix the copper block in its rearward position.

[0012] The number of through holes distributed on the left or right ring is 7-9.

[0013] The through holes are evenly distributed along the circumference.

[0014] The diameter of the through hole is 15-25mm.

[0015] Compared with the prior art, this utility model uses a number of through holes arranged radially in a circular ring structure to control the depth of the shaping bolts to push the copper block in the through holes, thereby precisely adjusting the shaping force on the outer wall of the part inside the ring. This makes the shaping of circular parts convenient and quick, simple to operate, easy to disassemble and assemble, and the cost is reduced accordingly. Attached Figure Description

[0016] Figure 1 This is a split diagram of an embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional view of the ring after the shaping bolts are installed (the left side is the outer wall of the ring, and the right side is the inner wall of the ring);

[0018] Figure 3 This is an instruction diagram for using this utility model to shape cylindrical parts;

[0019] See attached diagram: 1. Left ring, 2. Right ring, 3. Connecting bolt, 4. Shaping bolt, 5. Copper block, 6. Spring, 7. Cylindrical part. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings. For ease of explanation, the radial direction outward from the center of the annulus is defined as "outer," and the opposite direction is defined as "inner."

[0021] See Figure 1 and Figure 2 , Figure 1 and Figure 2This illustration shows one embodiment of the present invention, which mainly includes a left ring and a right ring that can be spliced ​​together to form a circular ring; the left ring and the right ring are provided with a plurality of through holes arranged radially.

[0022] Further, see Figure 1 The left and right rings each have threaded holes at their two joints. The threaded hole on the right ring is located at the end of the ring, while the threaded hole on the left ring is located on a radially arranged connecting plate and corresponds to that on the right ring. A complete ring is formed by inserting a connecting bolt into the two mating threaded holes. Preferably, in this embodiment, the through holes are evenly distributed on the circumference, with a central angle of 18° between them. The left ring has 7 holes, and the right ring has 9 holes. Furthermore, the diameter of the through holes is generally between 15 and 25 mm. See also... Figure 2 The inner wall of the outer section of the through hole is provided with internal threads, and the outer wall of the shaping bolt is provided with external threads. After the two are screwed in, the copper block can be fixed in the position after it has moved inward.

[0023] A cylindrical copper block, which can slide radially along a ring, is installed inside the through hole. Its inner end is used to contact the outer wall of the product to be shaped. The shaping bolts extend into the through hole from the outer opening. As the threads of the shaping bolts are screwed in, they continuously push the copper block radially inward until the inner end of the copper block contacts and presses against the outer wall of the product to be shaped, causing it to deform.

[0024] As a preferred option, see Figure 2 The outer wall of the outer section of the copper block has an outwardly protruding step, the diameter of which is larger than that of the inner section of the copper block but slightly smaller than that of the through hole. Correspondingly, the inner end of the through hole has an inwardly concave step, the diameter of which is slightly larger than that of the inner section of the copper block but smaller than that of the outer section of the copper block. The two ends of the spring are respectively connected to the annular planes of the outwardly protruding step and the inwardly concave step, forming a reset mechanism applied to the copper block. When the shaping bolt pressing the outer end of the copper block is removed, the spring in the pressing state releases its elastic force, thereby causing the copper block to disengage from the cylindrical product and return to its initial position.

[0025] The initial installation involves placing the cylindrical part to be shaped between the left and right rings, and then connecting the two rings with connecting bolts to form a complete circle, ensuring the cylindrical part is enclosed within the circle. Next, the spring 6 is fitted onto the outer protruding step (shoulder) of the copper block 5 and inserted into the through hole. At this point, the cross-section inside the through hole is as follows: Figure 2 As shown; then the shaping bolts are installed. When the shaping bolts are screwed into the through hole, they will apply a pushing force to the copper block inside, so that the copper block is close to the cylindrical part and is positioned.

[0026] During this process, the number and orientation of the shaping bolts should be selected according to the actual deformation of the cylindrical parts. This process can be carried out by hand-tightening or by applying slight force with a wrench until the copper block is against the cylindrical parts without gaps and resistance is felt.

[0027] See Figure 3 This is the state in which the tooling is installed in the middle section of the cylindrical part in this embodiment. It is worth noting that when actually shaping cylindrical parts with large axial dimensions, it is often necessary to disassemble and assemble the tooling at multiple axial sections for sequential shaping; this embodiment only uses... Figure 2 The situation shown is for illustrative purposes.

[0028] During the shaping process, based on the measurement results of the cylindrical part, the feed rate of the shaping bolt 4 located at the protruding deformation point is slowly increased. Figure 2 The part shown is deformed due to uneven stress caused by the grooves on its cylindrical wall. Specifically, the ungrooved parts will shrink inward because the internal stress is greater than that of the grooved parts; conversely, the ungrooved parts will expand outward, causing the whole part to deform into an elliptical shape.

[0029] Therefore, in this embodiment, the depth of the shaping bolts at the slotted portion should be gradually increased to push the copper block to press against the outer wall of the part. No shaping bolts are installed in the ungrooved position perpendicular to the slot, while the upward-sloping shaping bolts are used for auxiliary positioning. During the shaping process, the radial dimensions in each direction need to be continuously measured, and the depth of each shaping bolt adjusted accordingly, until the dimensions of the cylindrical part in each direction are within the tolerance zone.

[0030] Once the cylindrical part reaches the required tolerance, the tooling should remain in the aforementioned installation state for a period of time, the specific duration depending on the situation. Finally, remove the shaping bolts and disconnect the connecting bolts to separate the two rings, completing the shaping process. The embodiments of this utility model have been described above with reference to the accompanying drawings and examples. This utility model is not limited to the above embodiments. Those skilled in the art will understand that various changes in form and detail can be made in practical applications without departing from the spirit and scope of this utility model.

Claims

1. A shaping tool for a cylindrical product, characterized by: The left ring and the right ring can be spliced to form a circular ring; a plurality of through holes are distributed on the left ring and the right ring, and a copper block capable of sliding along the radial direction of the circular ring is arranged in each through hole; The shaping bolts respectively extend into the outer ends of the through holes to push the copper blocks to move radially towards the inner side, and the inner ends of the copper blocks are in contact with and extrude the outer wall of the product to be shaped.

2. A cylindrical product shaping tool according to claim 1, characterized in that: The outer wall of the copper block and the inner wall of the through hole are connected by a spring.

3. A cylindrical product shaping tool according to claim 2, characterized in that: The outer wall of the outer section of the copper block is provided with an outer convex step, and the inner wall of the inner end of the through hole is provided with an inner retracted step; the two ends of the spring are respectively connected to the outer convex step and the inner retracted step.

4. The cylindrical product shaping tooling of claim 1, wherein: The left ring and the right ring respectively have a half-circular ring structure and have the same inner diameter.

5. A shaping tool for cylindrical products according to claim 1 or 4, characterized in that: Two splicing positions of the left ring and the right ring are respectively provided with threaded holes, and a connecting bolt is inserted into the opposite threaded holes to form a complete circular ring.

6. A cylindrical product shaping tool according to claim 1, characterized in that: The inner wall of the through hole is provided with an internal thread, which cooperates with the external thread of the outer wall of the shaping bolt to fix the copper block at the position after moving inward.

7. A cylindrical product shaping tool according to claim 1, characterized in that: The number of through holes distributed on the left ring or the right ring is 7-9.

8. A shaping tool for cylindrical products according to claim 1 or 7, characterized in that: The through holes are uniformly distributed along the circumference.

9. A cylindrical product shaping tool according to claim 1 or 7, characterized in that: The diameter of the through hole is 15-25mm.

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