Die for forming bent part of pipe fitting
By designing a combination mold and a nitrogen spring combination mold, the problem of the difficulty in shaping and extending the exhaust pipe at the bend was solved, achieving high-precision molding and a high pass rate.
Patent Information
- Application Number
- CN202520965140.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-05-16
AI Technical Summary
The extrusion and extension of exhaust pipe components at bends is difficult, resulting in low forming accuracy and low pass rate.
The system employs a combination of upper and lower molds, along with nitrogen springs and a pre-positioning structure. Precise docking and mold closing are achieved through the action of hydraulic equipment, ensuring the shaping of the curved sections.
This improved the forming accuracy and product qualification rate at the bends of exhaust pipe components, meeting design requirements.
Smart Images
Figure CN223875927U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pipe fitting forming technical field, concretely relates to a pipe fitting bending part forming die. BACKGROUND
[0002] The chassis is composed of various parts, and the exhaust system is the last design component, the exhaust pipe fitting must be bent and profiled because it needs to avoid other parts, when the bending part profiled extension trend is difficult, the bending part forming die needs to be increased to assist, otherwise the forming precision is low, the effect is poor, and the qualified rate is low. UTILITY MODEL CONTENTS
[0003] The utility model discloses a pipe fitting bending part forming die with simple structure and reliable use, solves the problem of the difficulty of the bending part profiled extension trend of the exhaust pipe fitting, meets the pipe fitting design requirement, significantly improves the forming precision, and thus improves the product qualified rate.
[0004] The utility model discloses a pipe fitting bending part forming die, including the upper die plate, the lower die plate, the combination formula upper die of with upper die plate connection, the combination formula lower die of with lower die plate connection, its technical key points are:
[0005] A pipe fitting bending part forming die, including upper die plate, lower die plate, combination formula upper die with upper die plate connection, combination formula lower die with lower die plate connection, its technical key points are: the combination formula upper die includes the upper die middle part fixed type module in the middle part of the lower surface of upper die plate, the left preposition upper die module and right preposition upper die module located left and right sides of upper die middle part fixed type module, the combination formula lower die includes the lower die middle part fixed type module with upper die middle part fixed type module correspondence, the left preposition lower die module with left preposition upper die module correspondence, right preposition lower die module with right preposition upper die module correspondence, left nitrogen gas spring group is connected between left preposition upper die module and upper die plate, right nitrogen gas spring group is connected between right preposition upper die module and upper die plate, the side wall edge of right preposition upper die module and right preposition lower die module is equipped with the right convex concave preposition structure of mutual cooperation, the side wall edge of left preposition upper die module and left preposition lower die module is equipped with the left convex concave preposition structure of mutual cooperation.
[0006] The pipe fitting bending part forming die, the right convex concave preposition structure includes the first positioning boss on at least one side of the upper edge of the front and rear side wall of the right preposition lower die module, and the first positioning groove on the right preposition upper die module and matched with the first positioning boss.
[0007] The pipe fitting bending part forming die, the left convex concave preposition structure includes the second positioning boss on at least one side of the upper edge of the front and rear side wall of the left preposition lower die module, and the second positioning groove on the left preposition upper die module and matched with the second positioning boss.
[0008] The front and rear side walls of the middle part shaping module of the upper die are respectively provided with third positioning convex posts matched with the third positioning concave grooves.
[0009] The bottom surface of the lower die plate is provided with a plurality of lower supporting legs.
[0010] The lower surface of the middle part shaping module of the upper die is provided with a replaceable upper die core, and the upper surface of the middle part shaping module of the lower die is provided with a replaceable lower die core.
[0011] The right and left pre-positioning upper modules are provided with replaceable upper die cores, and the right and left pre-positioning lower modules are provided with replaceable lower die cores matched with the replaceable upper die cores.
[0012] The utility model discloses the beneficial effect is:
[0013] When using, the combined upper die is lowered under the action of the hydraulic equipment, the right pre-positioning upper module and the left pre-positioning upper module are contacted with the corresponding lower module under the action of the left and right nitrogen spring groups, that is, the right convex-concave pre-positioning structure formed by the right pre-positioning upper module and the right pre-positioning lower module and the left convex-concave pre-positioning structure formed by the left pre-positioning upper module and the left pre-positioning lower module guide the accurate butt joint of the die, that is, pre-positioning; the combined upper die is continuously lowered under the action of the hydraulic equipment, the left and right nitrogen spring groups are compressed to remove the gap, the right pre-positioning upper module, the left pre-positioning upper module and the middle part shaping module of the upper die are lowered to close the die, the bending shaping of the exhaust pipe fitting with the difficult extension trend is realized, the problem that the bending part of the exhaust pipe fitting is difficult to extend is solved, the extension trend of the pipe fitting is stable, the pipe fitting design requirement is met, the forming precision is significantly improved, and the product qualification rate is improved. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the structure schematic diagram of the utility model;
[0015] Figure 2 It is Figure 1 the plan view of
[0016] Figure 3 It is Figure 1 the section view of C-C direction in
[0017] Figure 4 It is Figure 2 the section view of E-E direction in
[0018] Figure 5 It isFigure 1 F-F cross-sectional view;
[0019] Figure 6 It is the structural schematic diagram of pipe fitting.
[0020] In the figure: 1. upper die plate, 2. upper die middle shaping module, 201. replaceable upper die core, 3. right pre-positioning upper module, 4. lower die plate, 5. right pre-positioning lower module, 6. lower die middle shaping module, 601. replaceable lower die core, 7. left pre-positioning lower module, 701. replaceable lower die core, 8. left pre-positioning upper module, 801. replaceable upper die core, 9. lower leg, 10. right nitrogen spring group, 11. right convex-concave pre-positioning structure, 12. left nitrogen spring group, 13. left convex-concave pre-positioning structure, 14. pipe fitting. DETAILED DESCRIPTION
[0021] The utility model is described in detail according to the drawing of the specification.
[0022] As Figures 1 to 6 The pipe fitting bending forming die, as shown in the figure, comprises an upper die plate 1, a lower die plate 4, a combined upper die connected with the upper die plate 1 and a combined lower die connected with the lower die plate 4.
[0023] The combined upper die comprises an upper die middle shaping module 2 located in the middle part of the lower surface of the upper die plate 1, a left pre-positioning upper module 8 and a right pre-positioning upper module 3 located on the left and right sides of the upper die middle shaping module 2. The combined lower die comprises a lower die middle shaping module 6 corresponding to the upper die middle shaping module 2, a left pre-positioning lower module 7 corresponding to the left pre-positioning upper module 8 and a right pre-positioning lower module 5 corresponding to the right pre-positioning upper module 3.
[0024] The left pre-positioning upper module 8 and the upper die plate 1 are connected with a left nitrogen spring group 12, and the right pre-positioning upper module 3 and the upper die plate 1 are connected with a right nitrogen spring group 10. The side wall edges of the right pre-positioning upper module 3 and the right pre-positioning lower module 5 are provided with right convex-concave pre-positioning structures 11 matched with each other, and the side wall edges of the left pre-positioning upper module 8 and the left pre-positioning lower module 7 are provided with left convex-concave pre-positioning structures 13 matched with each other.
[0025] In this embodiment, referring to Figure 3The right convex-concave pre-positioning structure 11 comprises a first positioning boss on the upper edge of the front and rear side walls of the right pre-positioning lower module 5 and a first positioning groove on the right pre-positioning upper module 5 and matched with the first positioning boss. The left convex-concave pre-positioning structure comprises a second positioning boss on the upper edge of the front side wall of the left pre-positioning lower module 7 and a second positioning groove on the left pre-positioning upper module 8 and matched with the second positioning boss. The front and rear side walls of the lower middle shaping module 6 are respectively provided with third positioning grooves, and the front and rear side walls of the upper middle shaping module 2 are respectively provided with third positioning bosses matched with the third positioning grooves.
[0026] The lower surface of the upper middle shaping module 2 is provided with a replaceable upper mold core 201, and the upper surface of the lower middle shaping module 6 is provided with a replaceable lower mold core 601, and the replaceable upper mold core 201 and the replaceable lower mold core 601 cooperate to form a bend pipe middle forming mold cavity. The left pre-positioning upper module 8 is provided with a replaceable upper mold core 801, and the left pre-positioning lower module 7 is provided with a replaceable lower mold core 701 matched with the replaceable upper mold core 801.
[0027] Working process:
[0028] In use, the pipe blank to be processed is placed on the combined lower mold and matched with the mold cavity. Under the action of the hydraulic device, the combined upper mold is lowered, and under the action of the left and right nitrogen spring groups 12, 10, the right pre-positioning upper module 3 and the left pre-positioning upper module 8 first contact the corresponding right pre-positioning lower module 5 and left pre-positioning lower module 7, that is, first guided to accurately butt the mold through the right convex-concave pre-positioning structure 11 and the left convex-concave pre-positioning structure 13, that is, pre-positioning. Under the action of the hydraulic device, the combined upper mold continues to be lowered, and the left and right nitrogen spring groups 12, 10 are compressed to eliminate the gap, and the right pre-positioning upper module 3, the left pre-positioning upper module 8 and the upper middle shaping module 2 are lowered to close the mold. After the work is finished, the hydraulic device drives the combined upper mold to reset, and the formed pipe 14 can be taken out.
[0029] The above embodiments of the utility model are described in detail, but the content described can only be the preferred embodiments of the utility model and cannot be considered to limit the scope of the utility model. Any equivalent changes and improvements made within the scope of the utility model can still belong to the scope of the utility model.
Claims
1. A pipe bending forming die comprising an upper die plate, a lower die plate, a combined upper die connected to the upper die plate, and a combined lower die connected to the lower die plate, characterized in that: The combined upper die comprises a middle part of the upper die forming module in the middle part of the lower surface of the upper die plate, left and right pre-positioning upper modules on the left and right sides of the middle part of the upper die forming module, and the combined lower die comprises a middle part of the lower die forming module corresponding to the middle part of the upper die forming module, a left pre-positioning lower module corresponding to the left pre-positioning upper module, and a right pre-positioning lower module corresponding to the right pre-positioning upper module.
2. The pipe bend forming die of claim 1, wherein: The right convex-concave pre-positioning structure comprises a first positioning boss on at least one side of the front and rear side walls of the right pre-positioning lower module, and a first positioning groove on the right pre-positioning upper module and matched with the first positioning boss.
3. The pipe bend forming die of claim 1, wherein: The left convex-concave pre-positioning structure comprises a second positioning boss on at least one side of the front and rear side walls of the left pre-positioning lower module, and a second positioning groove on the left pre-positioning upper module and matched with the second positioning boss.
4. The pipe bend forming die of claim 1, wherein: The front and rear side walls of the middle part of the lower die forming module are respectively provided with third positioning grooves, and the front and rear side walls of the middle part of the upper die forming module are respectively provided with third positioning bosses matched with the third positioning grooves.
5. The pipe bend forming mold of claim 1, wherein: The bottom surface of the lower die plate is provided with a plurality of lower supporting legs.
6. The pipe bend forming mold of claim 1, wherein: The lower surface of the middle part of the upper die forming module is provided with a replaceable upper die core, the upper surface of the middle part of the lower die forming module is provided with a replaceable lower die core, and the replaceable upper die core and the replaceable lower die core are matched to form a elbow pipe middle forming cavity.
7. The pipe bend forming mold of claim 1, wherein: At least one of the right pre-positioning upper module and the left pre-positioning upper module is provided with a replaceable upper die core, and the right pre-positioning lower module and the left pre-positioning lower module are provided with a replaceable lower die core matched with the replaceable upper die core.