Novel in-mold synchronous flaring and double-point punching copper plug forming device

Abstract

The invention discloses a novel in-mold synchronous flaring and double-point punching copper plug forming device which comprises a press machine, an upper mold is connected to an output rod at the bottom of the press machine, a lower mold is arranged below the upper mold, the upper mold is used for broaching a copper plug, and the lower mold is used for double punching of the copper plug. Step-by-step operation is combined into synchronous one-time operation through in-mold forming and a top inclined structure; flaring and double-point punching are completed through one-time action, in-mold forming is achieved, product precision is guaranteed, and the problem of precision loss caused by machining is solved; the working procedures are combined, the operation steps are reduced, the machining efficiency is improved, the process is optimized, the overall performance is improved, and the product quality is improved; the novel device is simpler and more convenient in structure and operability, and product precision loss caused by machining is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioner accessories, and particularly relates to a new in-mold synchronous flaring and double-dot copper plug forming device. Background Art

[0002] Currently, during the air conditioner manufacturing process, a stainless steel replacing copper project is underway. For the steel-copper conversion, a copper plug is required as a transition interface for brazing with other copper-aluminum pipes. The transfer copper plug usually uses flaring for positioning furnace welding with steel parts and double concave dot positioning for brazing with the external connecting pipe. The "step-by-step flaring and single-point concave dot punching method" is adopted. In this method, the copper plug needs to be reamed by a reaming head first, and then double concave dots are punched on both sides. When punching the concave dots, it will impact the outside of the copper plug, resulting in deformation of the circular copper plug produced by reaming. The processing accuracy of the copper plug is poor, the product is out of round after dot punching, and it is difficult to assemble and weld with stainless steel parts. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a new in-mold synchronous flaring and double-dot copper plug forming device.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A new in-mold synchronous flaring and double-dot copper plug forming device includes a press. An output rod at the bottom of the press is connected with an upper mold. A lower mold is arranged below the upper mold. The upper mold is used for reaming the copper plug, and the lower mold is used for double punching the copper plug.

[0006] Preferably, the press is arranged on an upper mounting plate. The output rod of the press passes through the upper mounting plate, and its lower end is connected with the upper mold. The lower mold is arranged on the top of a lower mounting plate.

[0007] Preferably, a workbench is arranged on the top of the lower mounting plate. The lower mold is arranged at the center of the top of the workbench. The lower mold includes a mold body. Sliders are arranged on both sides of the mold body. Press blocks are arranged on both sides of the bottom of the lower mounting plate.

[0008] Preferably, the bottom of the slider is slidably connected with the top of the workbench. The press block is arranged directly above its corresponding slider. The opposite surfaces of the press block and the slider both adopt an inclined surface structure. Under the extrusion of the press block, the slider slides towards the mold body.

[0009] Preferably, a mold hole is opened at the center of the top of the mold body. The reaming head at the lower end of the upper mold is arranged directly above the mold hole. A punching rod is arranged on one side of the slider close to the mold body. The side of the punching rod close to the mold body is a punching head. The punching head passes through the mold body and extends into the mold hole. A spring is sleeved outside the punching rod. The spring is located between the mold body and the slider.

[0010] Preferably, a blanking plate is provided at the bottom of the workbench. The blanking plate is slidably connected to the workbench up and down. A blanking rod is provided at the center of the blanking plate. The blanking rod passes through the top surface of the workbench and the center of the lower end of the die body. The upper end of the blanking rod extends into the die hole.

[0011] Preferably, pull rods are provided on both sides of the lower die. The upper ends of the pull rods are fixed to the bottom of the upper mounting plate. The lower ends of the pull rods pass through the blanking plate and the lower mounting plate. Through holes are provided at the connection between the lower mounting plate and the pull rods. Nuts are screwed onto the lower ends of the pull rods, and the outer diameter of the nuts is smaller than the inner diameter of the through holes.

[0012] Preferably, positioning rods are provided on the outer sides of the pull rods. The lower ends of the positioning rods are fixed to the top of the lower mounting plate. The positioning rods slidably pass through the upper mounting plate.

[0013] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0014] In the present invention, the in-mold forming and the top inclined structure are used to combine the step-by-step operations into a synchronous one-time operation; the flaring and double-point punching are completed with one action, and the in-mold forming is used to ensure the product accuracy and solve the problem of accuracy loss caused by processing; the processes are combined, the operation steps are reduced, the processing efficiency is improved, the process is optimized, the overall performance is improved, and the product quality is improved; the new device is simpler in structure and operability, and reduces the accuracy loss of the product caused by processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of a new type of in-mold synchronous flaring and double-point punching copper plug forming device of the present invention;

[0016] Figure 2 is the cross-sectional view of a new type of in-mold synchronous flaring and double-point punching copper plug forming device of the present invention;

[0017] Figure 3 is the enlarged view of the structure at A in a new type of in-mold synchronous flaring and double-point punching copper plug forming device of the present invention.

[0018] Reference numerals: 1, press; 2, upper die; 3, lower die; 31, slider; 32, pressing block; 33, die body; 34, punching rod; 35, spring; 36, die hole; 4, upper mounting plate; 41, pull rod; 5, lower mounting plate; 51, positioning rod; 52, workbench; 53, blanking plate; 54, blanking rod; 55, through hole. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following is a detailed description of the specific embodiments of the present invention.

[0020] The "range" disclosed in the present invention is defined in the form of a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of a particular range. The ranges defined in this way can include the end values or not include the end values, and can be combined arbitrarily, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10 to 50 is listed for a specific parameter, ranges of 10 to 40 and 20 to 50 are also contemplated. In addition, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, then the following ranges are all contemplated: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, and 2 to 5. In this application, unless otherwise specified, the numerical range "a to b" represents an abbreviated representation of any real number combination between a and b, where a and b are both real numbers. For example, the numerical range "0 to 5" means that all real numbers between "0 to 5" have been fully listed herein, and "0 to 5" is only an abbreviated representation of these numerical combinations.

[0021] If there is no special instruction, all embodiments and optional embodiments of this application can be combined with each other to form a new technical solution.

[0022] If there is no special instruction, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0023] If there is no special instruction, all steps of this application can be carried out sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method can include steps (a) and (b) carried out sequentially, or can also include steps (b) and (a) carried out sequentially. For example, it is mentioned that the method may further include step (c), which means that step (c) can be added to the method in any order. For example, the method can include steps (a), (b), and (c), or can also include steps (a), (c), and (b), or can also include steps (c), (a), and (b), etc.

[0024] If there is no special instruction, the "including" and "comprising" mentioned in this application mean open-ended or can also be closed-ended. For example, the "including" and "comprising" can mean that other components not listed can also be included or comprised, or can also only include or comprise the listed components.

[0025] If there is no special instruction, the reaction is carried out under normal temperature and normal pressure conditions.

[0026] If there is no special instruction, all parts or percentages are by weight or weight percentage.

[0027] In the present invention, the substances used are all known substances, which can be purchased or synthesized by known methods.

[0028] In the present invention, the devices or equipment used are all conventional devices or equipment known in the field and can be purchased.

[0029] The following further describes the specific implementation manner of a novel in-mold synchronous flaring and double-point copper plug forming device of the present invention in conjunction with embodiments. The novel in-mold synchronous flaring and double-point copper plug forming device of the present invention is not limited to the description of the following embodiments.

[0030] Embodiment 1:

[0031] A novel in-mold synchronous flaring and double-point copper plug forming device, as Figures 1-3 shown, includes a press 1. An output rod at the bottom of the press 1 is connected with an upper die 2. A lower die 3 is arranged below the upper die 2. The upper die 2 is used for expanding the hole of the copper plug, and the lower die 3 is used for double-punching the copper plug.

[0032] In a possible implementation manner, the press 1 is arranged on an upper mounting plate 4. The output rod of the press 1 passes through the upper mounting plate 4, and its lower end is connected with the upper die 2. The lower die 3 is arranged on the top of a lower mounting plate 5.

[0033] In a possible implementation manner, a workbench 52 is arranged on the top of the lower mounting plate 5. The lower die 3 is arranged at the center of the top of the workbench 52. The lower die 3 includes a die body 33. Sliders 31 are arranged on both sides of the die body 33. Pressure blocks 32 are arranged on both sides of the bottom of the lower mounting plate 5.

[0034] In a possible implementation manner, the bottom of the slider 31 is slidably connected with the top of the workbench 52. The pressure block 32 is arranged directly above its corresponding slider 31. The opposite surfaces of the pressure block 32 and the slider 31 both adopt a bevel structure. Under the extrusion of the pressure block 32, the slider 31 slides towards the die body 33.

[0035] In a possible implementation manner, a die hole 36 is opened at the center of the top of the die body 33. The hole-expanding head at the lower end of the upper die 2 is arranged directly above the die hole 36. A punching rod 34 is arranged on one side of the slider 31 close to the die body 33. The side of the punching rod 34 close to the die body 33 is a punching head. The punching head passes through the die body 33 and extends into the die hole 36. A spring 35 is sleeved outside the punching rod 34. The spring 35 is located between the die body 33 and the slider 31.

[0036] In a possible implementation manner, a stripper plate 53 is arranged at the bottom of the workbench 52. The stripper plate 53 is slidably connected with the workbench 52 up and down. A stripper rod 54 is arranged at the center of the stripper plate 53. The stripper rod 54 passes through the top surface of the workbench 52 and the center of the lower end of the die body 33. The upper end of the stripper rod 54 extends into the die hole 36.

[0037] In a possible implementation, tie rods 4 are provided on both sides of the lower die 3. The upper ends of the tie rods 4 are fixed to the bottom of the upper mounting plate 4. The lower ends of the tie rods 4 pass through the stripper plate 53 and the lower mounting plate 5. Through holes 55 are provided at the connection between the lower mounting plate 5 and the tie rods 4. Nuts are screwed onto the lower ends of the tie rods 4, and the outer diameter of the nuts is smaller than the inner diameter of the through holes 55.

[0038] In a possible implementation, positioning rods 51 are provided outside the tie rods 4. The lower ends of the positioning rods 51 are fixed to the top of the lower mounting plate 5, and the positioning rods 51 slide through the upper mounting plate 4.

[0039] By adopting the above technical solutions:

[0040] Integral in-mold forming is adopted, and the power is provided by a press. When the press is in the initial position, the tube blank to be formed is placed. The upper die descends and elastically presses the copper plug into the forming die. When the upper die descends, it passes through the side inclined cutting block, converting the linear motion into an oblique motion. The double-acting punch head moves linearly along a fixed trajectory. When the press continues to descend to the bottom dead center, the flaring punch and the double-acting punch action are completed simultaneously. When the press returns to the initial position, the pulling mechanism ejects the formed tube blank from the mold cavity.

[0041] Working principle: As Figures 1-3 shown, the power is provided by the press 1. When the press 1 is in the initial position, the tube blank to be formed is placed. The upper die 2 descends and elastically presses the copper plug into the die hole 36. The pressure block 32 descends. Under the extrusion of the pressure block 32, the slider 31 slides towards the die body 33, converting the linear motion into an oblique motion. The double-acting punch head moves linearly along a fixed trajectory. When the press 1 continues to descend to the bottom dead center, the hole-expanding head and the punch head complete the double-acting punch action simultaneously. When the press 1 returns to the initial position, the pulling mechanism ejects the formed tube blank from the mold cavity.

[0042] The above content is a further detailed description of the present invention in combination with specific preferred implementation manners. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A new type of in-mold synchronous expansion and double-point copper plug forming device, characterized in that: The invention comprises a press machine (1), wherein an upper die (2) is connected to an output rod at the bottom of the press machine (1), a lower die (3) is arranged below the upper die (2), the upper die (2) is used for expanding the hole of the copper plug, and the lower die (3) is used for double-punching the copper plug.

2. A novel in-mold synchronous expansion and double-point copper plug forming device as claimed in claim 1, characterized in that: The press (1) is arranged on an upper mounting plate (4); an output rod of the press (1) passes through the upper mounting plate (4) and its lower end is connected to an upper die (2); and the lower die (3) is arranged on the top of a lower mounting plate (5).

3. A novel in-mold synchronous expansion and double-point copper plug forming device as claimed in claim 2, characterized in that: A workbench (52) is provided on the top of the lower mounting plate (5), the lower mold (3) is arranged at the center of the top of the workbench (52), the lower mold (3) comprises a mold body (33), both sides of the mold body (33) are arranged on sliders (31), and both sides of the bottom of the lower mounting plate (5) are provided with pressure blocks (32).

4. A novel in-mold synchronous expansion and double-point copper plug forming device as claimed in claim 3, characterized in that: The bottom of the slider (31) is slidably connected to the top of the workbench (52), the pressing block (32) is arranged directly above its corresponding slider (31), and the opposing surfaces of the pressing block (32) and the slider (31) both adopt an inclined surface structure. Under the pressure of the pressing block (32), the slider (31) slides toward the mold body (33).

5. A novel in-mold synchronous expansion and double-point copper plug forming device as claimed in claim 4, characterized in that: A die hole (36) is provided at the center of the top of the die body (33); a hole expanding head at the lower end of the upper die (2) is arranged directly above the die hole (36); a punching rod (34) is provided on the side of the slider (31) close to the die body (33); a dotting head is provided on the side of the punching rod (34) close to the die body (33); the dotting head passes through the die body (33) and extends into the die hole (36); a spring (35) is sleeved on the outer side of the punching rod (34); and the spring (35) is located between the die body (33) and the slider (31).

6. A novel in-mold synchronous expansion and double-point copper plug forming device as claimed in claim 5, characterized in that: A material stripping plate (53) is provided at the bottom of the workbench (52), and the material stripping plate (53) is connected to the workbench (52) by sliding up and down. A material stripping rod (54) is provided at the center of the material stripping plate (53), and the material stripping rod (54) passes through the top surface of the workbench (52) and the center of the lower end of the mold body (33), and the upper end of the material stripping rod (54) extends into the mold hole (36).

7. A novel in-mold synchronous expansion and double-point copper plug forming device as claimed in claim 6, characterized in that: Pull rods (4) are provided on both sides of the lower mold (3). The upper ends of the pull rods (4) are fixed to the bottom of the upper mounting plate (4). The lower ends of the pull rods (4) pass through the stripping plate (53) and the lower mounting plate (5). A through hole (55) is provided at the connection between the lower mounting plate (5) and the pull rods (4). A nut is screwed on the lower end of the pull rods (4). The outer diameter of the nut is smaller than the inner diameter of the through hole (55).

8. A novel in-mold synchronous expansion and double-point copper plug forming device as claimed in claim 7, characterized in that: A positioning rod (51) is provided on the outside of the pull rod (4), the lower end of the positioning rod (51) is fixed to the top of the lower mounting plate (5), and the positioning rod (51) slides through the upper mounting plate (4).

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