Forming die

Abstract

The utility model discloses a forming die. The forming die is characterized by comprising a lower die, an upper die and an inner die, a lower groove is formed in the upper surface of the lower die; an upper groove is formed in the lower surface of the upper die; the upper groove corresponds to the lower groove in position; the lower groove is provided with a transition pipe section lower forming groove, a flat pipe section lower forming groove and an inner mold lower positioning groove; the outer end of the forming groove at the lower part of the transition pipe section is communicated with the side wall surface of the lower die; the upper groove is provided with a transition pipe section upper forming groove, a flat pipe section upper forming groove and an inner mold upper positioning groove; the outer end of the forming groove in the upper part of the transition pipe section is communicated with the side wall surface of the upper mold; the inner mold is placed in the inner mold lower part positioning groove; and a positioning block is arranged at one end of the inner mold and faces the forming groove in the lower part of the transition pipe section. The die is used for one-time die forming of connector stamping, meanwhile, the surface of a product cannot be damaged, and the size precision and the appearance precision of the product can be guaranteed.

Description

Technical Field

[0001] The utility model relates to a forming die. Background Art

[0002] See also Figure 1-3 , which is an existing joint installed on a car air conditioner, the joint includes a round pipe section N-1, a transition pipe section N-2 and a flat pipe section N-3; there is a certain distance h between the center line of the round pipe section N-1 and the center line of the flat pipe section N-3. And the joint is a special-shaped joint.

[0003] The traditional mold structure for processing flat tubes (such as CN220497358U) is only suitable for processing symmetrical structures. Since the center lines of the round tube segment N-1 and the flat tube segment N-3 of the above-mentioned joint are not concentric, it is difficult to form the transition tube segment N-2 during axial extrusion and the shape error is large. There is also uneven force during extrusion, which easily causes surface damage and affects product quality. In addition, when the product is formed in the mold and taken out in the axial direction, it gets stuck and is difficult to pull out. Utility Model Content

[0004] The utility model provides a forming die to solve the problem that the existing die is difficult to form the joint and is easy to be squeezed and damaged on the surface.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is: a molding mold, characterized in that: it includes a lower mold, an upper mold and an inner mold; the upper surface of the lower mold is provided with a lower groove; the lower surface of the upper mold is provided with an upper groove; the upper groove corresponds to the position of the lower groove; the lower groove has a lower molding groove of the transition pipe section, a lower molding groove of the flat pipe section and a lower positioning groove of the inner mold; the outer end of the lower molding groove of the transition pipe section is connected to the side wall of the lower mold; the upper groove has an upper molding groove of the transition pipe section, an upper molding groove of the flat pipe section and an upper positioning groove of the inner mold; the outer end of the upper molding groove of the transition pipe section is connected to the side wall of the upper mold; the inner mold is placed in the lower positioning groove of the inner mold; one end of the inner mold is provided with a positioning block and faces the lower molding groove of the transition pipe section.

[0006] By adopting the above scheme, when in use, in the mold open state, the pipe is first placed in the lower groove, the inner end of the pipe is inserted into the positioning block for positioning and is in contact with the inner mold for axial limitation, the pipe is accurately positioned, and then the upper mold is punched downward and closed in place with the lower mold. At this time, the pipe is punched and formed by the combination of the upper groove and the lower groove. At this time, the shape of the transition pipe section of the pipe is completely matched with the shape of the inner cavity formed by the combination of the lower forming groove of the transition pipe section and the upper forming groove of the transition pipe section, and the shape of the flat pipe section of the pipe is completely matched with the shape of the inner cavity formed by the combination of the lower forming groove of the flat pipe section and the upper forming groove of the flat pipe section. Therefore, the joint can be punched and formed by the mold once, with high production efficiency and low cost; at the same time, the dimensional accuracy and shape accuracy of the product can be guaranteed.

[0007] In addition, this technical solution adopts radial stamping of the round tube, which replaces the traditional axial extrusion of the mold, which can not only avoid the surface of the product from being squeezed and damaged, but also make it easy to take out the product after the mold is opened.

[0008] Furthermore, the upper die is connected to the lower die by a guide pin, and the upper die guides and moves relative to the lower die during mold opening and mold closing, thereby ensuring precision molding and further improving the shape and dimensional accuracy of the product after molding.

[0009] Furthermore, there are multiple guide pins.

[0010] Furthermore, the inner mold is rectangular, and the positioning block is flat or rectangular. Furthermore, the positioning block and the inner mold are an integrated structure.

[0011] Furthermore, the positioning block is made of Cr12MoV material.

[0012] Furthermore, the upper surface of the lower mold is provided with a lower bevel at the position of the lower forming groove of the transition pipe section; the lower surface of the upper mold is provided with an upper bevel at the position of the upper forming groove of the transition pipe section; and the upper bevel matches the shape of the lower bevel.

[0013] Beneficial effects of the utility model:

[0014] First, the utility model adopts a mold structure different from the existing one, adopts upper and lower stamping molding, and replaces the existing axial extrusion molding, so that the joint can be stamped once and the mold is formed, and the surface of the product will not be damaged, and the size accuracy and shape accuracy of the product can be guaranteed;

[0015] Second, the utility model puts the pipe into the lower groove before stamping, and the inner end of the pipe is inserted into the positioning block for front and rear positioning and keeps in contact with the inner mold for axial positioning, which can ensure the relative position and length dimensional accuracy of the round pipe section, transition pipe section and flat pipe section of the product after subsequent molding; in addition, during the molding process, the positioning block is located in the flat pipe section and will shape the upper and lower surfaces of the flat pipe section to support it, so as to avoid the collapse of the upper and lower surfaces of the flat pipe section during stamping and ensure its stable appearance and the flatness of the upper and lower surfaces;

[0016] Third, in the present invention, during stamping, the transition pipe section of the pipe material is completely matched with the inner cavity shape formed by the lower forming groove of the transition pipe section and the upper forming groove of the transition pipe section, and the flat pipe section of the pipe material is completely matched with the inner cavity shape formed by the lower forming groove of the flat pipe section and the upper forming groove of the flat pipe section, so that the joint can be stamped once and molded, with high production efficiency and low cost; at the same time, the dimensional accuracy and shape accuracy of the product can be guaranteed;

[0017] Fourth, the utility model adopts radial stamping of the round tube, which replaces the axial extrusion of the traditional mold. Since the upper mold is completely open without obstruction, and the inner mold can slide freely up and down in the positioning groove at the bottom of the inner mold, when the product is pulled out in the direction away from the inner mold, it is very easy and will not be stuck. This can not only avoid the surface of the product from being squeezed and damaged, but also make it easy to take out the product after the mold is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1-3 The invention is a structural schematic diagram of an existing joint for assembling on an automobile air conditioner.

[0019] Figure 4-5 It is a structural schematic diagram of a molding die of the utility model in a mold closing state (excluding the product).

[0020] Figure 6 yes Figure 5 Middle AA section view.

[0021] Figure 7-8 It is an exploded view of a forming die of the utility model.

[0022] Figure 9-10 This is a working state diagram of a molding die of the utility model when it works to the first step.

[0023] Fig.11 yes Fig.10 Middle BB section view.

[0024] Figure 12-13 This is a working state diagram of a molding die of the utility model when it is working to the second step.

[0025] Fig.14 yes Fig.13Middle CC section view.

[0026] Fig.15 This is a working state diagram of a molding die of the utility model when it is working to the third step. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0028] Example 1: See Figure 4-8 A molding die comprises a lower die 1, an upper die 2 and an inner die 3.

[0029] Specifically, a lower groove 1-1 is provided on the upper surface of the lower mold 1; an upper groove 2-1 is provided on the lower surface of the upper mold 2; and the upper groove 2-1 corresponds to the lower groove 1-1 in position.

[0030] See also Figure 7-8 Specifically, the lower groove 1-1 has a transition pipe segment lower forming groove 1-11, a flat pipe segment lower forming groove 1-12 and an inner mold lower positioning groove 1-13; the outer end (i.e., the left end) of the transition pipe segment lower forming groove 1-11 is connected to the left wall surface of the lower mold 1. The transition pipe segment lower forming groove 1-11 matches the lower shape of the transition pipe segment N-2 of the joint; the flat pipe segment lower forming groove 1-12 matches the lower shape of the flat pipe segment N-3 of the joint; and the inner mold lower positioning groove 1-13 matches the lower shape of the inner mold 3.

[0031] See also Figure 7-8 Specifically, the upper groove 2-1 has a transition pipe segment upper forming groove 2-11, a flat pipe segment upper forming groove 2-12 and an inner mold upper positioning groove 2-13; the outer end (i.e., the left end) of the transition pipe segment upper forming groove 2-11 is connected to the left wall surface of the upper mold 2. The transition pipe segment upper forming groove 2-1 matches the upper shape of the transition pipe segment N-2 of the joint; the flat pipe segment upper forming groove 2-12 matches the upper shape of the flat pipe segment N-3 of the joint; and the inner mold upper positioning groove 2-13 matches the upper shape of the inner mold 3.

[0032] See also Figure 8-9 Specifically, the inner mold 3 is placed in the positioning groove 1-13 at the lower part of the inner mold; a positioning block 4 is provided at one end (left end) of the inner mold 3 and faces the lower forming groove 1-11 of the transition pipe section. Preferably, the positioning block 4 and the inner mold 3 are an integral structure. Specifically, the thickness of the positioning block 4 is the same as the height of the flat hole in the flat pipe section N-3 (see Fig.13 ).

[0033] Furthermore, the inner mold 3 is rectangular, the positioning block 4 is flat or rectangular, and the positioning grooves 1-13 at the bottom of the inner mold and the positioning grooves 2-13 at the top of the inner mold are rectangular.

[0034] Furthermore, the positioning block 4 is made of Cr12MoV material. The positioning block 4 has high hardness, is not easily deformed, and can maintain a stable shape for a long time.

[0035] When used for the stamping and forming of the joint, the stamping die of this embodiment is installed on a stamping machine (hydraulic press or other stamping equipment), and its working steps can be as follows:

[0036] The first step (see Figure 9-11 ), in the mold open state, first put the pipe into the lower groove 1-1 of the lower mold 1, and insert the inner end of the pipe into the positioning block 4 (to achieve front and rear positioning) and keep in contact with the inner mold 3 (to achieve axial positioning);

[0037] Step 2 (see Figure 12-14 ), the upper die 2 is moved downward until the die is completely closed, at which time the tube is stamped and formed by the combination of the upper die 2 and the lower die 1;

[0038] Step 3 (see Fig.15 ), move the upper mold 2 upward until the mold is opened, and then pull the product out in the direction facing away from the inner mold 3.

[0039] Therefore, this embodiment adopts a mold structure different from the existing one, adopts upper and lower stamping molding, and replaces the existing axial extrusion molding, so that the joint can be stamped into the mold once, and the product surface will not be damaged, which can ensure the size accuracy and shape accuracy of the product.

[0040] In the first step, the tube is first placed in the lower groove 1-1, and the inner end of the tube is inserted into the positioning block 4 for front and rear positioning and keeps in contact with the inner mold 3 for axial positioning, which can ensure the dimensional accuracy of the relative position and length of the round tube segment N-1, transition tube segment N-2 and flat tube segment N-3 of the product after subsequent molding; in addition, during the molding process, the positioning block 4 is located in the flat tube segment N-3 and will provide internal support for the upper and lower surfaces of the flat tube segment N-3, avoiding the collapse of the upper and lower surfaces of the flat tube segment N-3 during stamping, thereby ensuring the stability of the shape and the flatness of the upper and lower surfaces.

[0041] In the second step, since the outer shape of the transition pipe segment N-2 of the pipe is completely matched with the inner shape of the combination of the lower forming groove 1-11 of the transition pipe segment and the upper forming groove 2-11 of the transition pipe segment, and the outer shape of the flat pipe segment N-3 of the pipe is completely matched with the inner shape of the combination of the lower forming groove 1-12 of the flat pipe segment and the upper forming groove 2-12 of the flat pipe segment, the joint can be stamped once by the mold, with high production efficiency and low cost; at the same time, the dimensional accuracy and appearance accuracy of the product can be guaranteed. In addition, the present embodiment adopts radial stamping of the round tube to replace the traditional axial extrusion of the mold, which can not only avoid the surface of the product from being squeezed and damaged, but also can easily remove the product after the mold is opened.

[0042] In the third step, since the upper mold 2 is completely open without any obstruction, and the inner mold 3 can slide freely up and down in the positioning groove 1-13 at the lower part of the inner mold, the product can be pulled out in the direction away from the inner mold 3 very easily and will not be stuck.

[0043] Furthermore, the upper mold 2 is connected to the lower mold 1 by a guide pin 5. The upper mold 2 is guided to move relative to the lower mold 1 during mold opening and mold closing, which can ensure precision molding and further improve the shape and dimensional accuracy of the product after molding. Specifically, the lower mold 1 is provided with a guide pin mounting hole 1-3, and the upper mold 2 is provided with a guide hole 2-3; the lower part of the guide pin 5 is installed in the guide pin mounting hole 1-3; the upper part of the guide pin 5 is slidably matched with the guide hole 2-3. When the upper mold 2 is opened and closed, the upper mold 2 is guided to move up and down relative to the lower mold 1, which can reduce vibration and deflection, and further improve the shape and dimensional accuracy of the product after stamping.

[0044] Furthermore, there are a plurality of guide pins 5. In this embodiment, there are two guide pins 5 distributed left and right.

[0045] Embodiment 2: This embodiment is based on Embodiment 1: Further, the upper surface of the lower mold 1 is provided with a lower bevel 1-2 at the position of the lower forming groove 1-11 of the transition pipe section; the lower surface of the upper mold 2 is provided with an upper bevel 2-2 at the position of the upper forming groove 2-11 of the transition pipe section; and the upper bevel 2-2 matches the shape of the lower bevel 1-2 (see Figure 7-8 This can achieve accurate positioning during mold closing and reduce the mold closing misalignment error between the upper mold 1 and the lower mold 2 (see Fig.12 ), further improving product molding accuracy.

[0046] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A molding die, characterized in that: It comprises a lower mold (1), an upper mold (2) and an inner mold (3); The upper surface of the lower mold (1) is provided with a lower groove (1-1); the lower surface of the upper mold (2) is provided with an upper groove (2-1); the upper groove (2-1) corresponds to the position of the lower groove (1-1); The lower groove (1-1) comprises a transition pipe section lower forming groove (1-11), a flat pipe section lower forming groove (1-12) and an inner mold lower positioning groove (1-13); the outer end of the transition pipe section lower forming groove (1-11) is connected to the side wall surface of the lower mold (1); The upper groove (2-1) comprises an upper forming groove (2-11) of a transition pipe section, an upper forming groove (2-12) of a flat pipe section and an upper positioning groove (2-13) of an inner mold; the outer end of the upper forming groove (2-11) of the transition pipe section is in communication with the side wall surface of the upper mold (2); The inner mold (3) is placed in the positioning groove (1-13) at the bottom of the inner mold; a positioning block (4) is provided at one end of the inner mold (3) and faces the molding groove (1-11) at the bottom of the transition pipe section.

2. A molding die according to claim 1, characterized in that: The lower die (1) and the upper die (2) are connected via a guide pin (5).

3. A molding die as claimed in claim 2, characterized in that: The guide pins (5) are multiple.

4. A molding die according to claim 1, characterized in that: The inner mold (3) is rectangular; the positioning block (4) is flat or rectangular.

5. A molding die according to claim 1, characterized in that: The positioning block (4) and the inner mold (3) are an integral structure.

6. A molding die according to any one of claims 1 to 5, characterized in that: The positioning block (4) is made of Cr12MoV material.

7. A molding die according to any one of claims 1 to 5, characterized in that: The upper surface of the lower die (1) is provided with a lower inclined surface (1-2) at the position of the lower forming groove (1-11) of the transition pipe section; the lower surface of the upper die (2) is provided with an upper inclined surface (2-2) at the position of the upper forming groove (2-11) of the transition pipe section; and the upper inclined surface (2-2) matches the outer shape of the lower inclined surface (1-2).

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