CN107838296B - One-step forming die for hinge type interconnection part and use method of one-step forming die - Google Patents

Abstract

The present invention discloses a one-time forming mold for a hinge-type interconnecting component and a method for using the same, and belongs to the field of mold technology. It includes an upper mold assembly, the upper mold assembly includes an upper mold, the upper mold includes a first stamping surface, the first stamping surface is composed of a plurality of arc surfaces connected in sequence, and the arc surface protrudes downward. The first stamping surface of the upper mold used in the present invention is composed of a plurality of arc surfaces connected in sequence, the arc surface protrudes downward, and the protruding arc surface forms multiple line contacts with the slab. During the rapid downward movement of the bending machine, the downward pressure can be evenly dispersed on the slab, which effectively offsets the shaking error. At the same time, the arc surface can effectively avoid scratches on the surface of the slab. The obtained short side length and long side length precision difference of the hinge-type interconnecting component is 28.60*0.51‑14.58=0.01mm, and the ratio of its short side to its long side is within the design requirement range.

Description

One-step forming mold for hinge-type interconnection component and use method thereof

Technical Field

The present invention belongs to the technical field of molds, and more specifically, relates to a one-step molding mold for hinge-type interconnecting components and a use method thereof.

Background technique

The hinge-type interconnection component is in the shape of a right-angled hook, which is used for the clamping connection between two components. It is convenient and quick to use. Therefore, the scope of use of this component is relatively wide, which makes the usage gradually increase. The hinge-type interconnection components used on the EMU require high precision and no surface scratches in order to ensure safe operation during high-speed operation. The traditional production process is casting or forging. Although the hot-formed components have good performance, they consume a lot of energy and pollute the environment. The traditional process is developing in the direction of cold rolling.

After searching, patent document 1: Chinese patent CN201210287040.X discloses a die for 90-degree bending of stamping parts, the die includes: an upper die and a lower die, the upper die includes a first floating material block, a second floating material block, a punch slider and a leveling block, the lower die includes a lower pad, a first push rod and a second push rod, the upper end of the punch slider is provided with a material placement groove that matches the structure of the stamping part, and the punch slider is arranged at the upper end of the first floating material block, the lower end of the first floating material block is connected to the first push rod, the lower end of the second floating material block is connected to the second push rod, and the lower end of the leveling block is fixed to the lower pad. The die uses the second floating material block, the punch slider and the leveling block to bend the stamping part 90 degrees in the horizontal direction. This bending method can be used for stamping hinge-type interconnected components, but the die requires multiple driving mechanisms to drive the second floating material block and the leveling block, and can only perform vertical stamping on the bending machine, and cannot achieve horizontal stamping, so the die is limited in use on the bending machine.

Patent document 2: Chinese patent CN201210178181.8 discloses a screen cover mold, including an upper mold and a lower mold corresponding to the upper mold, and a first workstation for bending the two ends of the screen cover at 45 degrees between the upper mold and the lower mold, and a second workstation for bending the two ends of the screen cover at 90 degrees after the 45-degree bend. The mold has a simple structure and can punch double bends, but the mold includes a first workstation and a second workstation, and the two workstations are split. When in use, the slab needs to be transferred from the first workstation to the second workstation, which is time-consuming and labor-intensive, and has low work efficiency.

Summary of the invention

1. Problem to be solved

The hinge-type interconnection component currently used includes a short side, a bottom side and a long side. The length of the short side is defined as _L1 , the length of the bottom side is defined as _L2 , and the length of the long side is defined as _L3 , then _L1 = _0.51L3 ± 0.02mm, there is no scratch on the surface, the length accuracy of the short side and the long side is determined, and the corresponding processing difficulty increases. Considering the high control accuracy of the bending machine, the mold of patent document 1 cannot be used in the bending machine. The mold of patent document 2 processes the hinge-type interconnection component, and the ratio of the short side to the long side cannot be controlled. The purpose of the present invention is to provide a one-time molding mold for a hinge-type interconnection component, which can mold the hinge-type interconnection component with high precision, and the ratio of the short side to the long side is within the design requirement range. At the same time, the surface of the hinge-type interconnection component is free of scratches, so that the hinge-type interconnection component can be safely used in an acidic environment.

2. Technical solution

In order to solve the above problems, the technical solution adopted by the present invention is as follows:

The hinge-type interconnecting component one-step forming die of the present invention comprises an upper die assembly, wherein the upper die assembly comprises an upper die, and the upper die comprises a first stamping surface, wherein the first stamping surface is composed of a plurality of circular arc surfaces connected in sequence, and the circular arc surfaces protrude downward.

In a possible embodiment of the present invention, the upper mold also includes a first vertical surface, a second vertical surface and a first horizontal surface, wherein the first vertical surface is parallel to the second vertical surface, the first vertical surface, the first stamping surface, the second vertical surface and the first horizontal surface are connected in sequence, and the first horizontal surface and the second vertical surface are connected to form a 90-degree right angle.

In a possible embodiment of the present invention, the mold also includes a lower mold assembly, which includes a lower mold and a unloading mechanism used in conjunction with the lower mold. The lower mold is provided with a cavity, a long slot is provided above the cavity, and a spring slot is provided below the cavity. The width of the long slot is equal to the bottom edge of the hinge-type interconnecting component. The unloading mechanism is movably fixed in the cavity, and the head of the unloading mechanism is deeply inserted into the long slot.

In a possible implementation manner of the present invention, the unloading mechanism includes a unloading block, an ejection spring and a fixing bolt, the ejection spring is sleeved on the fixing bolt, one end of the ejection spring is placed in the spring groove, and the other end is against the lower end surface of the unloading block, and the sum of the height of the unloading block and the short side _L1 is equal to the sum of the height of the cavity and the height of the long slot.

In a possible implementation manner of the present invention, the lower mold assembly further includes a base, which is fixed to the lower mold by bolts, and the base can be fixed on a working platform of the bending machine.

In a possible implementation manner of the present invention, the radii of the plurality of circular arc surfaces are the same.

In a possible implementation manner of the present invention, the connection between the plurality of arc surfaces is filled with magnetic powder particles with a particle size of 30-50 microns.

In a possible implementation manner of the present invention, the upper edge of the long slot is an arc surface, and the radius of the arc surface is 1.5 mm.

A method for using the above-mentioned hinge type interconnection component one-step forming mold of the present invention is specifically carried out according to the following steps:

Step S101, assemble the lower mold, discharge mechanism and base of the lower mold assembly, and check to ensure that all components are reliably connected;

Step S102, placing the lower die assembly on the workbench of the bending machine, and fixing the lower die assembly with bolts;

Step S103, hoisting the upper die assembly onto the lower die assembly, adjusting the position of the upper die assembly so that the first stamping surface of the upper die and the long notch of the lower die are closely matched;

Step S104: After the bending machine slider moves downward to press the upper die assembly, the upper die assembly is fixed to the bending machine slider by bolts, and the slider drives the upper die assembly to move up and down 2-3 times to ensure that the upper die and the lower die are accurately matched;

Step S105, placing a stainless steel slab with a thickness of 0.8-1.2 mm on the upper end surface of the lower die, and adjusting the stamping;

Step S106: The upper die moves downward rapidly under the driving force of the bending machine, and the upper die stamping is completed, and the stamping is maintained for 10 to 15 seconds;

Step S107, the bending machine drives the upper mold to quickly retreat, and the unloading block of the unloading mechanism pushes the component out to remove the component;

Step S108, heating the component to 400-420°C, on the one hand to eliminate the micro deformation and bending stress caused by the arc surface pressing, on the other hand, at this temperature, the magnetic powder particles are demagnetized to facilitate cleaning of the component surface, and then cooled to room temperature.

3. Beneficial effects

Compared with the prior art, the present invention has the following beneficial effects:

(1) The hinge-type interconnection component one-time forming mold of the present invention adopts a first stamping surface of the upper mold which is composed of a plurality of arc surfaces connected in sequence, the arc surface protrudes downward, and the protruding arc surface forms multiple line contacts with the plate blank. During the rapid downward movement of the bending machine, the downward pressure can be evenly dispersed on the plate blank, which effectively offsets the shaking error. At the same time, the arc surface can effectively avoid scratches on the surface of the plate blank, and the hinge-type interconnection component is formed with high precision. The short side length of the obtained hinge-type interconnection component is 14.58 mm, and the long side length is 28.60 mm. The precision difference between the two is 28.60*0.51-14.58=0.01 mm, and the ratio of the short side to the long side is within the design requirement range;

(2) The hinge-type interconnection component one-step forming mold of the present invention adopts an upper mold whose first vertical surface is parallel to the second vertical surface, the first vertical surface, the first stamping surface, the second vertical surface and the first horizontal surface are connected in sequence, and the first horizontal surface and the second vertical surface are connected to form a 90-degree right angle. The structure is simple, so that the force on the upper mold is relatively uniform, and the upper mold is prevented from being frequently broken;

(3) The hinge-type interconnection component one-time molding die of the present invention, the lower mold and the unloading mechanism are used in conjunction with each other, mainly considering that the molded component will be stuck in the lower mold, and the short side and the long side are in contact with the long notch, and there is no gap to take out the component. The unloading mechanism can quickly eject the component, which is convenient and quick to use;

(4) In the hinge-type interconnection component one-step forming die of the present invention, the radius of the arc surfaces of the first stamping surface are the same, which can evenly disperse the pressure, so that the deformation of the surface of the slab is roughly the same, further avoiding the possibility of scratches;

(5) The hinge-type interconnecting component one-time forming mold of the present invention has a small amount of magnetic powder particles filled in the connection between the arc surfaces. The magnetic powder particles not only increase the friction between the two, but also act as a buffer pad and reduce the wear of the arc surface. The upper mold and the slab are not prone to slipping. In actual mass production, the surface of the slab is often scratched to varying degrees due to the sliding friction of the mold. Therefore, the amount of magnetic powder particles should not be too much. The surface of the slab obtained by the present invention is basically scratch-free.

(6) The present invention has a simple structure, reasonable design and is easy to manufacture.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

FIG1 is a schematic diagram of the structure of a hinge-type interconnection component in the prior art;

FIG2 is a schematic structural diagram of a one-step forming mold for a hinge-type interconnection component according to the present invention;

FIG3 is a schematic structural diagram of an upper mold assembly of a one-step molding mold for a hinge-type interconnection component according to the present invention;

FIG4 is a schematic diagram of a first stamping surface of a one-step forming die for a hinge-type interconnection component according to the present invention;

FIG5 is a schematic structural diagram of a lower mold assembly of a one-step molding mold for a hinge-type interconnection component according to the present invention;

FIG. 6 is a side view of FIG. 5 .

Description of the markings in the figure:

1. Upper die assembly; 110. Upper die; 120. First vertical surface; 130. First punching surface; 140. Second vertical surface; 150. First horizontal surface;

2. Lower mold assembly; 210. Lower mold; 211. Cavity; 212. Long notch; 213. Spring groove; 220. Unloading mechanism; 221. Unloading block; 222. Ejection spring; 223. Fixing bolt; 230. Base.

Detailed ways

The following detailed description of exemplary embodiments of the present invention refers to the accompanying drawings, which form a part of the description, and in which exemplary embodiments of the present invention that can be implemented are shown as examples. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to implement the present invention, it should be understood that other embodiments can be implemented and various changes can be made to the present invention without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but is only for the purpose of illustrating and not limiting the description of the characteristics and features of the present invention, so as to propose the best mode for performing the present invention and to enable those skilled in the art to implement the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

The following detailed description of the present invention and example embodiments may be better understood in conjunction with the accompanying drawings, in which elements and features of the present invention are identified by reference numerals.

Example 1

Please refer to Figures 1 to 6. The hinge-type interconnection component one-time molding mold of the present embodiment includes an upper mold assembly 1 and a lower mold assembly 2, wherein the upper mold assembly 1 includes an upper mold 110, and the upper mold 110 includes a first stamping surface 130, a first vertical surface 120, a second vertical surface 140 and a first horizontal surface 150, wherein the first vertical surface 120 is parallel to the second vertical surface 140, the first vertical surface 120, the first stamping surface 130, the second vertical surface 140 and the first horizontal surface 150 are connected in sequence, and the first horizontal surface 150 is connected to the second vertical surface 140 to form a 90-degree right angle.

In view of the fact that the hinge-type interconnection components currently used include a short side, a bottom side and a long side, the length of the short side is defined as L ₁ , the length of the bottom side is defined as L ₂ , and the length of the long side is defined as L ₃ , then L ₁ = 0.51L ₃ ± 0.02 mm can meet the use requirements, and there is no scratch on the surface of the component. Then the factor affecting the length ratio of the short side to the long side is mainly the slippage between the upper mold 110 and the slab, and the scratch is mainly caused by the friction between the upper mold 110 and the slab, which increases the difficulty of component processing. The inventor has conducted a large number of experiments and analyses, and designed the first stamping surface 130 to be composed of several segments of circular arc surfaces connected in sequence. The circular arc surface is convex downward, and the convex circular arc surface forms multiple line contacts with the slab. The upper mold 110 and the slab are not easy to slip. During the rapid downward movement of the bending machine, the downward pressure can be evenly dispersed on the slab, which effectively offsets the shaking error caused by the action of the unloading mechanism 220. At the same time, the circular arc surface can effectively avoid scratches on the surface of the slab, and form the hinge-type interconnecting components with high precision. The short side length of the obtained hinge-type interconnecting component is 14.58mm, and the long side length is 28.60mm. The accuracy difference between the two is 28.60*0.51-14.58=0.01mm, and the ratio of the short side to the long side is within the design requirement.

According to patent document 3: CN201410789099.8, a bending machine uses a bending lower mold 210 to manufacture hinge-type interconnection components, and the qualified rate of the product is only 90%, while the qualified rate of the product in this embodiment is more than 95%.

As shown in FIG. 4 , the radii of several arc surfaces are the same. The radii of several arc surfaces of the first stamping surface 130 are the same, which can evenly disperse the pressure, make the deformation of the surface of the slab roughly the same, and further avoid the possibility of scratches.

In addition, magnetic powder particles with a particle size of 30-50 microns are filled at the connection points of several sections of circular arc surfaces. The magnetic powder particles not only increase the friction between the two, but also act as a buffer pad and reduce the wear of the circular arc surfaces, making it less likely for the upper mold 110 and the slab to slip. In actual mass production, the surface of the slab is often scratched to varying degrees due to the sliding friction of the mold. Therefore, the amount of magnetic powder particles should not be too much. The surface of the slab obtained in this embodiment is basically scratch-free.

The lower mold assembly 2 of the mold includes a lower mold 210 and a discharge mechanism 220 used in conjunction with the lower mold 210. The lower mold 210 is provided with a cavity 211, a long slot 212 is provided above the cavity 211, and a spring slot 213 is provided below the cavity 211. The width of the long slot 212 is equal to the bottom edge of the hinge-type interconnecting component. The discharge mechanism 220 is movably fixed in the cavity 211, and the head of the discharge mechanism 220 is deeply inserted into the long slot 212. The upper edge of the long slot 212 is an arc surface with a radius of 1.5 mm.

As can be seen in FIGS. 5 and 6 , the unloading mechanism 220 includes a unloading block 221, an ejection spring 222 and a fixing bolt 223. The ejection spring 222 is sleeved on the fixing bolt 223. One end of the ejection spring 222 is placed in the spring groove 213, and the other end abuts against the lower end surface of the unloading block 221. The sum of the height of the unloading block 221 and the short side _L1 is equal to the sum of the height of the cavity 211 and the height of the long slot 212.

In order to facilitate the installation of the lower mold assembly 2, the lower mold assembly 2 also includes a base 230, and the base 230 is fixed to the lower mold 210 by bolts. The base 230 can be fixed on the working platform of the bending machine.

Example 2

The method for using the one-step forming mold for the hinge type interconnection component of this embodiment is specifically carried out according to the following steps:

Step S101, assemble the lower mold 210, the unloading mechanism 220 and the base 230 of the lower mold assembly 2, and check to ensure that all components are reliably connected;

Step S102, placing the lower die assembly 2 on the workbench of the bending machine, and fixing the lower die assembly 2 with bolts;

Step S103, hoisting the upper die assembly 1 onto the lower die assembly 2, adjusting the position of the upper die assembly 1 so that the first stamping surface 130 of the upper die 110 and the long notch 212 of the lower die 210 are closely matched, and then brushing magnetic powder particles on the first stamping surface 130, and the magnetic powder particles all fall into the connection;

Step S104, after the bending machine slider moves downward to press the upper die assembly 1, the upper die assembly 1 is fixed to the bending machine slider by bolts, and the slider drives the upper die assembly 1 to move up and down 2-3 times to ensure that the upper die 110 and the lower die 210 are accurately matched;

Step S105, placing a stainless steel slab with a thickness of 1.0 mm on the upper end surface of the lower die 210, and adjusting the stamping;

Step S106: The upper die 110 moves downward rapidly under the driving force of the bending machine, and the upper die 110 completes the stamping, and is maintained for 10 to 15 seconds;

Step S107, the bending machine drives the upper mold 110 to quickly retreat, and the unloading block 221 of the unloading mechanism 220 ejects the component to remove the component;

Step S108, heating the component to 400-420°C, on the one hand to eliminate the micro deformation and bending stress caused by the arc surface pressing, on the other hand, at this temperature, the magnetic powder particles are demagnetized to facilitate cleaning of the component surface, and then cooled to room temperature.

Claims (5)

1. A one-step forming die for a hinge-type interconnecting component, comprising an upper die assembly (1), the upper die assembly (1) comprising an upper die (110), the upper die (110) comprising a first stamping surface (130), characterized in that the first stamping surface (130) is composed of a plurality of circular arc surfaces connected in sequence, the circular arc surfaces protruding downward; The upper mold (110) further comprises a first vertical surface (120), a second vertical surface (140) and a first horizontal surface (150), wherein the first vertical surface (120) is parallel to the second vertical surface (140), the first vertical surface (120), the first stamping surface (130), the second vertical surface (140) and the first horizontal surface (150) are connected in sequence, and the first horizontal surface (150) and the second vertical surface (140) are connected to form a 90-degree right angle; The mold further comprises a lower mold assembly (2), the lower mold assembly (2) comprising a lower mold (210) and a discharge mechanism (220) used in conjunction with the lower mold (210), the lower mold (210) being provided with a cavity (211), a long slot (212) being provided above the cavity (211), and a spring slot (213) being provided below the cavity (211), the width of the long slot (212) being equal to the bottom edge of the hinge-type interconnecting component, the discharge mechanism (220) being movably fixed in the cavity (211), and the head of the discharge mechanism (220) being deeply inserted into the long slot (212); The radii of the plurality of circular arc surfaces are the same; The connection points of the plurality of arc surfaces are filled with magnetic powder particles with a particle size of 30-50 microns. 2. The one-step forming mold for a hinge-type interconnecting component according to claim 1, characterized in that the unloading mechanism (220) comprises a unloading block (221), an ejection spring (222) and a fixing bolt (223), the ejection spring (222) is sleeved on the fixing bolt (223), one end of the ejection spring (222) is placed in the spring groove (213), and the other end abuts against the lower end surface of the unloading block (221), and the sum of the height of the unloading block (221) and the short side _L1 of the hinge-type interconnecting component is equal to the sum of the height of the cavity (211) and the height of the long slot (212). 3. The hinge-type interconnecting component one-step forming mold according to claim 2 is characterized in that the lower mold assembly (2) also includes a base (230), the base (230) is fixed to the lower mold (210) by bolts, and the base (230) is fixed on the working platform of the bending machine. 4. The hinge-type interconnection component one-step forming mold according to claim 3, characterized in that the upper edge of the long slot (212) is an arc surface, and the radius of the arc surface is 1.5 mm. 5. A method for using the one-step forming mold for hinge-type interconnecting components according to claim 4, characterized in that the method is specifically carried out according to the following steps: Step S101, assembling the lower mold (210), the unloading mechanism (220) and the base (230) of the lower mold assembly (2), and checking to ensure that all components are reliably connected; Step S102, placing the lower die assembly (2) on the workbench of the bending machine, and fixing the lower die assembly (2) with bolts; Step S103, hoisting the upper die assembly (1) onto the lower die assembly (2), adjusting the position of the upper die assembly (1) so that the first punching surface (130) of the upper die (110) and the long notch (212) of the lower die (210) are tightly matched; Step S104: After the slide block of the bending machine moves downward and presses the upper die assembly (1), the upper die assembly (1) is fixed to the slide block of the bending machine by bolts, and the slide block drives the upper die assembly (1) to move up and down 2-3 times to ensure that the upper die (110) and the lower die (210) are accurately matched in position; Step S105, placing a stainless steel blank with a thickness of 0.8-1.2 mm on the upper end surface of the lower die (210), and adjusting the stamping; Step S106: the upper die (110) is rapidly moved downward under the driving force of the bending machine, and the upper die (110) is punched and maintained for 10 to 15 seconds; Step S107, the bending machine drives the upper mold (110) to quickly retreat, and the unloading block (221) of the unloading mechanism (220) ejects the component to remove the component; Step S108, heating the component to 400-420°C, and then cooling to room temperature.