A flexible positioning device for punching tube-type workpieces

Abstract

The utility model relates to the technical field of auxiliary devices for processing, and in particular to a flexible positioning device for stamping processing of tube-type workpieces. It includes a positioning rod, a fixed lower positioning ring is provided at the lower part of the positioning rod, an upper positioning ring is sleeved on the outside of the positioning rod, a support ring capable of preventing the upper positioning ring from continuing to descend is provided on the positioning rod, a plurality of ear plates are provided on the outside of the lower positioning ring, a plurality of ear plates corresponding to the ear plates on the lower positioning ring are provided on the outside of the upper positioning ring, and also includes pull plates with the same number as the total number of ear plates, a plurality of ear plates are respectively hinged to one end of a plurality of pull plates, and two pull plates hinged on the corresponding ear plates on the upper positioning ring and the lower positioning ring are paired into a group, and the other ends of the two pull plates in each group are hinged. The utility model has a simple structure and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary devices for processing, in particular to a flexible positioning device used for stamping processing of tube-like workpieces. Background Art

[0002] Combination Figure 4 As shown, in current production, the lower end of the cylindrical workpiece 5 is often punched into the mold 6 to reduce the diameter of its lower end. During stamping, a heating coil is provided on the outside of the lower end of the cylindrical workpiece 5 for heating. After the heating is completed, the upper end of the cylindrical workpiece 5 is pressed downward by a pressing head, so that the lower end of the cylindrical workpiece 5 enters the mold 6. Because a heating coil is provided on the outside of the lower end of the cylindrical workpiece 5, it is impossible to straighten the lower end of the cylindrical workpiece 5 on the outside to make it in the correct position (but the upper part can). Only a supporting device that can resist the inner wall of the cylindrical workpiece 5 can be provided inside the cylindrical workpiece 5. However, the lower end of the cylindrical workpiece 5 becomes smaller after the stamping is completed. Therefore, it is necessary to develop a positioning device that can position the lower end of the cylindrical workpiece 5 and allow the stamped cylindrical workpiece 5 to be separated from it upward. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a flexible positioning device for punching processing of tube-like workpieces in view of the above-mentioned technical deficiencies.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a flexible positioning device for stamping processing of tubular workpieces, including a positioning rod, a fixed lower positioning ring is arranged at the lower part of the positioning rod, an upper positioning ring is sleeved on the outside of the positioning rod, a support ring that can prevent the upper positioning ring from continuing to descend is arranged on the positioning rod, a plurality of ear plates are arranged on the outside of the lower positioning ring, a plurality of ear plates corresponding to the ear plates on the lower positioning ring are arranged on the outside of the upper positioning ring, and also include pull plates with the same number as the total number of ear plates, the plurality of ear plates are respectively hinged to one end of the plurality of pull plates, the two pull plates hinged on the corresponding ear plates on the upper positioning ring and the lower positioning ring are paired into a group and the other ends of the two pull plates in each group are hinged.

[0005] To further optimize the technical solution, the number of ear plates on the lower positioning ring is six.

[0006] To further optimize the technical solution, the lower positioning ring is welded to the upper positioning rod.

[0007] The utility model has the following advantages: a fixed lower positioning ring is arranged at the lower part of the positioning rod, an upper positioning ring is sleeved on the outer part of the positioning rod and a support ring which can prevent the upper positioning ring from continuing to descend is also arranged on the positioning rod, a plurality of ear plates are arranged on the upper positioning ring and the lower positioning ring, and the other ends of two pull plates which are hinged at one end are respectively hinged to the corresponding ear plates on the upper positioning ring and the lower positioning ring. When the upper positioning ring falls on the support ring, the end of the pull plate away from the ear plate can just abut against the inner wall of the cylindrical workpiece, thereby playing a positioning role. After the stamping is completed, the cylindrical workpiece is lifted up, and its lower end pushes the outer end of the pull plate inward, so that the cylindrical workpiece after the stamping can be completely separated from the positioning device upward after the stamping. The positioning device has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The present invention is a structural schematic diagram of a flexible positioning device used for stamping processing of tube-type workpieces.

[0009] Figure 2 This is a state diagram of the positioning device of the present application before stamping when in use.

[0010] Figure 3 This is a diagram of the state of the positioning device of the present application after stamping when in use.

[0011] Figure 4 It is a schematic diagram of the structure of the cylindrical workpiece and the mold.

[0012] In the figure: 1. positioning rod; 11. support ring; 2. lower positioning ring; 3. pull plate; 4. upper positioning ring; 41. ear plate; 5. cylindrical workpiece; 6. mold. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0014] Specific implementation method: Combination Figure 1-4As shown, a flexible positioning device for punching tube-like workpieces comprises a positioning rod 1, a fixed lower positioning ring 2 is arranged at the lower part of the positioning rod 1, an upper positioning ring 4 is sleeved on the outer part of the positioning rod 1, and the upper positioning ring 4 can move up and down relative to the positioning rod 1, and a support ring 11 is arranged on the positioning rod 1 to prevent the upper positioning ring 4 from continuing to descend, a plurality of ear plates 41 are arranged on the outer part of the lower positioning ring 2, and a plurality of ear plates 41 corresponding to the ear plates 41 on the lower positioning ring 2 are arranged on the outer part of the upper positioning ring 4, and also comprises a pull plate 3 with the same number as the total number of the ear plates 41, and the plurality of ear plates 41 are respectively hinged to one end of the plurality of pull plates 3, and the two pull plates 3 hinged on the corresponding ear plates 41 on the upper positioning ring 4 and the lower positioning ring 2 are paired into a group, and the other ends of the two pull plates 3 in each group are hinged. When the upper positioning ring 4 falls on the support ring 11, the end of the pull plate 3 away from the ear plate 41 just contacts the inner wall of the cylindrical workpiece 5 to play a positioning role.

[0015] Furthermore, the number of the ear plates 41 on the lower positioning ring 2 is six and they are symmetrically distributed about the axis of the lower positioning ring 2, so that the positioning effect is better and the number of the ear plates 41 is not too large to increase the cost unnecessarily.

[0016] Specifically, the lower positioning ring 2 is welded to the upper positioning rod 1 .

[0017] When using, combine Figure 2 As shown, the lower end of the positioning rod 1 is fixed on the mold 6 and the two are coaxial. Under the action of gravity, the upper positioning ring 4 falls on the support ring 11, and then the cylindrical workpiece 5 is sleeved on the outside of the positioning device. The end of the pull plate 3 away from the ear plate 41 just contacts the inner wall of the cylindrical workpiece 5 to position it. The upper end of the cylindrical workpiece 5 is straightened from the outside. After the heating coil (not shown in the figure) heats the lower end of the cylindrical workpiece 5, the stamping work is carried out. Figure 3 As shown, after the stamping is completed, the lower end of the cylindrical workpiece 5 becomes smaller. When it is lifted upward, its lower end pushes the outer end of the pull plate 3 inward and forces the upper positioning ring 4 to rise, so that the cylindrical workpiece 5 after the stamping can be completely separated from the positioning device upward, and then under the action of gravity, the upper positioning ring 4 falls on the support ring 11 for the next stamping operation.

[0018] The above shows and describes the basic principles and main features of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A flexible positioning device for punching a tube-like workpiece, comprising a positioning rod (1), characterized in that: A fixed lower positioning ring (2) is arranged at the lower part of the positioning rod (1); an upper positioning ring (4) is sleeved on the outside of the positioning rod (1); a support ring (11) capable of preventing the upper positioning ring (4) from further descending is arranged on the positioning rod (1); a plurality of ear plates (41) are arranged on the outside of the lower positioning ring (2); a plurality of ear plates (41) corresponding to the ear plates (41) on the lower positioning ring (2) are arranged on the outside of the upper positioning ring (4); and a number of pull plates (3) equal in number to the total number of the ear plates (41) are also included. The plurality of ear plates (41) are respectively hinged to one end of the plurality of pull plates (3); two pull plates (3) hinged to the corresponding ear plates (41) on the upper positioning ring (4) and the lower positioning ring (2) are paired into a group, and the other ends of the two pull plates (3) in each group are hinged.

2. A flexible positioning device for punching tube-like workpieces according to claim 1, characterized in that: The number of the ear plates (41) on the lower positioning ring (2) is six.

3. A flexible positioning device for punching tube-like workpieces according to any one of claims 1 to 2, characterized in that: The lower positioning ring (2) is welded to the upper positioning rod (1).

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