CN108237181B - Forming device - Google Patents

Abstract

A forming device is used to form a part to be formed into multiple characteristic structures. The forming device includes a mold unit, a cooling unit, an air cooling unit, and an air escape unit. The mold unit surrounds a mold cavity and forms multiple characteristic sections that are not in contact with the part to be formed. The cooling unit includes multiple cooling water channels arranged on the mold unit. The air cooling unit includes multiple blowing nozzles opened on the mold unit and connected to the mold cavity respectively facing the characteristic sections, and multiple cooling gas passages respectively connected to the blowing nozzles and used to supply cooling gas. Cooling gas can be blown into the mold cavity through the blowing nozzles to cool the part of the part to be formed that is not in contact with the mold unit, so that the cooling speed can be uniform and excessive differences in the wall thickness of the finished product can be avoided, thereby improving the product yield.

Description

Forming device

technical field

The invention relates to a forming device, in particular to a forming device suitable for hot stamping forming.

Background technique

Referring to Fig. 1 , a die 1 for general hot stamping forming is used to form a workpiece 2 to be formed, and the die 1 includes a lower die 11, an upper die 13 that abuts with the lower die 11 and jointly defines a mold cavity 12 , a plurality of cooling water passages 14 provided in the lower mold 11 and the upper mold 13 around the mold cavity 12, and a plurality of characteristic sections formed in the lower mold 11 and the upper mold 13 and facing the mold cavity 12 15. The to-be-formed part 2 is placed in the lower mold 11, then the lower mold 11 and the upper mold 13 are clamped so that the to-be-formed part 2 is placed in the mold cavity 12, and finally hot stamping is carried out to make the to-be-formed part 2 The molded part 2 forms a plurality of characteristic structures 21 which respectively correspond to the characteristic sections 15 .

In the traditional hot stamping process, the to-be-formed part 2 is first placed in a high-temperature heating furnace at 850 to 950 degrees Celsius to heat up, and then quickly sent to the mold 1 for mold clamping and hot stamping. In order to avoid the mold 1 The temperature is too high, so the lower mold 11 and the upper mold 13 are cooled through the cooling water channel 14, so that the lower mold 11 and the upper mold 13 can dissipate heat. However, when the to-be-formed part 2 is a pipe, it will not contact the characteristic section 15 as shown in Figure 1 when it is just placed in the mold cavity 12, that is, the part that will be formed into the characteristic structure 21 will not contact. The lower mold 11 and the upper mold 13, therefore, the part of the part to be formed 2 that is in contact with the mold cavity 12 has a larger temperature drop than the part that is not in contact, resulting in the uneven cooling rate of the to-be-formed part 2 resulting in a finished product The difference in wall thickness is too large, thereby reducing the product yield, and even causing the to-be-formed part 2 to rupture due to excessive local wall thickness deformation.

Contents of the invention

The object of the present invention is to provide a forming device which can uniformly cool the workpiece to be formed.

The forming device of the present invention is used for forming a plurality of characteristic structures from a piece to be formed. The forming device includes a mold unit, a cooling unit, an air cooling unit, and an air escape unit. The mold unit surrounds a mold cavity for accommodating the object to be formed, and the cavity forms a plurality of characteristic sections that are not in contact with the object to be formed and are used to form the object to be formed into the characteristic structure . The cooling unit includes a plurality of cooling water channels arranged on the mold unit and arranged around the mold cavity. The air-cooling unit includes a plurality of mouthpieces respectively opened on the mold unit facing the characteristic sections and communicating with the mold cavity, and a plurality of cooling air passages respectively connected to the mouthpieces and used for supplying cooling air. The escape unit includes a plurality of through holes extending from the outer surface of the mold unit to the mold cavity to communicate with the mold cavity.

Preferably, the aforementioned forming device, wherein the mold unit includes a lower mold, and an upper mold that fits with the lower mold to jointly define the mold cavity, and the characteristic section is formed on the lower mold and the upper mold And facing the mold cavity, the mouthpieces of the air cooling unit are respectively formed on the lower mold and the upper mold corresponding to the characteristic sections, and communicate with the mold cavity, and the through holes are opened in the lower mold and the upper mold respectively. The outer surface of the upper mold.

Preferably, in the aforementioned forming device, wherein the mold unit includes a lower mold, and an upper mold that fits with the lower mold to jointly define the mold cavity, the feature section is formed on the lower mold and faces the The mold cavity, the mouthpieces of the air cooling unit are respectively formed in the lower mold corresponding to the characteristic sections and communicate with the mold cavity, and the through holes are respectively opened on the outer surface of the lower mold.

Preferably, in the aforementioned forming device, wherein the mold unit includes a lower mold, and an upper mold that fits with the lower mold to jointly define the mold cavity, the characteristic section is formed on the upper mold and faces the The mold cavity, the mouthpieces of the air cooling unit are respectively formed on the upper mold corresponding to the characteristic sections and communicate with the mold cavity, and the through holes are respectively opened on the outer surface of the upper mold.

Another object of the present invention is to provide another form of forming device.

The forming device of the present invention is used for forming a feature structure from a workpiece to be formed. The forming device includes a mold unit, a cooling unit, an air cooling unit, and an air escape unit. The mold unit surrounds a mold cavity for accommodating the object to be formed, and the cavity forms a characteristic section that does not contact the object to be formed and is used to form the object to be formed into the characteristic structure. The cooling unit includes a plurality of cooling water channels arranged on the mold unit and arranged around the mold cavity. The air-cooling unit includes a mouthpiece opened on the mold unit facing the characteristic section and communicating with the mold cavity, and a cooling gas passage connected to the mouthpiece and used for supplying cooling air. The escape unit includes a plurality of through holes extending from the outer surface of the mold unit to the mold cavity to communicate with the mold cavity. The through holes of the air escape unit are respectively communicated with the characteristic sections.

Preferably, in the aforementioned forming device, wherein the mold unit includes a lower mold, and an upper mold that abuts with the lower mold to jointly define the mold cavity, the characteristic section is formed on the lower mold and faces the mold The mouthpiece of the air-cooling unit is formed in the lower mold corresponding to the characteristic section and communicates with the mold cavity, and the through holes are respectively opened on the outer surface of the lower mold.

Preferably, in the aforementioned forming device, wherein the mold unit includes a lower mold, and an upper mold that fits with the lower mold to jointly define the mold cavity, the characteristic section is formed on the upper mold and faces the mold The mouthpiece of the air-cooling unit is formed in the upper mold corresponding to the characteristic section and communicates with the mold cavity, and the through holes are respectively opened on the outer surface of the upper mold.

Preferably, in the above-mentioned forming device, the said through holes are respectively communicated with the said characteristic sections.

The beneficial effect of the present invention is that cooling gas can be blown into the mold cavity through the mouthpiece to cool the part of the part to be formed that is not in contact with the mold unit, so that the cooling rate can be uniform and the wall thickness difference of the finished product can be avoided If it is too large, the product yield rate will be improved.

Description of drawings

Figure 1 is a schematic diagram illustrating an existing mold;

Figure 2 is a schematic diagram illustrating a first embodiment of the forming apparatus of the present invention;

Fig. 3 and Fig. 4 all are cross-sectional views, illustrate in this first embodiment, only have the aspect of two characteristic sections and two mouthpieces;

Figure 5 is a schematic diagram illustrating a second embodiment of the forming apparatus of the present invention; and

Fig. 6 is a sectional view illustrating another aspect of the second embodiment.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 2, a first embodiment of the forming device 3 of the present invention is applicable to a tubular workpiece 4 surrounding a vent hole 40, and the main purpose of the forming device 3 is to form the workpiece 4 into Four characteristic structures 41 . This forming device 3 comprises a mold unit 5, a cooling unit 6 arranged on the mold unit 5, an air cooling unit 7 arranged on the mold unit 5, and an air escape unit arranged on the mold unit 5 8. The mold unit 5 includes a lower mold 51 and an upper mold 53 abutting with the lower mold 51 to jointly define a mold cavity 52 . The mold cavity 52 includes four characteristic sections 54 that are not in contact with the object to be formed 4 and are respectively formed on the lower mold 51 and the upper mold 53 .

The cooling unit 6 includes a plurality of cooling water channels 61 passing through the lower mold 51 and the upper mold 53 respectively and arranged around the mold cavity 52 .

The air-cooling unit 7 includes four mouthpieces 71 respectively opened on the lower mold 51 and the upper mold 53 facing the characteristic section 54 and communicating with the mold cavity 52, and four mouthpieces 71 respectively connected to the mouthpieces 71 for Cooling gas passage 72 for supplying cooling gas. Both the cooling water passage 61 and the cooling gas passage 72 extend along the axial direction of the workpiece 4 and are respectively connected to a water supply source and an air supply source.

The escape unit 8 includes a plurality of through holes 81 defined on the outer surfaces of the lower mold 51 and the upper mold 53 and communicating with the mold cavity 52 . In the first embodiment, the through-holes 81 are arranged at intervals between the lower mold 51 and the upper mold 53 , but the through-holes 81 may also be arranged only in the lower mold 51 or the upper mold 53 . Preferably, the through holes 81 communicate with the feature section 54 or its vicinity respectively.

When hot stamping is formed, the workpiece 4 to be formed is placed in the mold cavity 52 first, then the lower mold 51 and the upper mold 53 are molded together, and after hot stamping is carried out, through the characteristic section 54, the The to-be-formed part 4 forms the feature 41 . In the first embodiment, the characteristic structure 41 is a rounded corner, but of course it may also be a bump or other shaped structure. During the aforementioned forming process, the cooling water channel 61 will cool down the lower mold 51 and the upper mold 53, so that the part of the workpiece 4 to be formed that directly contacts the lower mold 51 and the upper mold 53 will cool down at a faster rate. , and the cooling gas channel 72 will blow the cooling gas through the mouthpiece 71 into the mold cavity 52 respectively corresponding to the characteristic sections 54, so that the gas can cool the to-be-formed part 4 without contacting the characteristic region The part of the section 54, so the part of the workpiece 4 to be formed that contacts and does not contact the mold unit 5 can be cooled, so that the cooling rate can be balanced and the forming characteristics are more uniform, thereby avoiding not being in contact with the mold cavity 52 Some parts have better formability due to higher temperature, resulting in a larger deformation rate during hot stamping, which makes the wall thickness difference of the finished product too large. Next, high-pressure gas will be introduced through the vent hole 40 surrounded by the object to be formed 4, so that the object to be formed 4 will bulge toward the wall of the cavity 52 during the forming process to form the cavity 52 and the features The shape of the structure 41 . While the to-be-formed part 4 bulges toward the wall of the mold cavity 52, the cooling gas blown into the mold cavity 52 through the cooling gas passage 72 and the blowing port 71 can escape in the mold through the through hole 81. Outside the unit 5, the forming of the object 4 to be formed will not be affected due to the cooling gas remaining in the mold cavity 52.

Referring to Fig. 3 and Fig. 4, the characteristic sections 54 may also have only two or more as shown in Fig. 81 just equally only offer on this lower mold 51. In addition, the characteristic section 54 can also be formed on the upper mold 53 as shown in FIG. 4 , and then the mouthpiece 71 and the through hole 81 are also only opened on the upper mold 53 .

Referring to Fig. 5 and Fig. 6, it is a second embodiment of the forming device 3 of the present invention, the second embodiment is substantially the same as the first embodiment, the difference is that the mold unit 5 is as shown in Fig. 5 Only one characteristic segment 54 is formed on the lower mold 51 to form a characteristic structure 41 on the workpiece 4 to be formed. The air cooling unit 7 only includes a mouthpiece 71 opened on the lower mold 51, and a cooling gas passage 72 connected to the mouthpiece 71, and the through hole 81 is opened on the lower mold 51 and communicates with the feature Section 54. Of course, the characteristic section 54 of the second embodiment can also be formed only on the upper mold 53 as shown in FIG. 6 , then the mouthpiece 71 and the through hole 81 are opened on the upper mold 53 . The second embodiment provides the arrangement of the air cooling unit 7 and the air escape unit 8 when there is only a single characteristic section 54 , which effectively improves the versatility.

In summary, since the cooling water passage 61 cools the mold unit 5, the part of the workpiece 4 that contacts the mold unit 5 will have a faster cooling rate than the part that does not contact the mold unit 5, and through One or more mouthpieces 71 can cool the part of the workpiece 4 that is not in contact with the mold unit 5, so that the whole of the workpiece 4 has a balanced cooling rate and can avoid the wall thickness difference of the finished product from being too large, so it can indeed Reach the purpose of the present invention.

Claims (8)

1. a kind of forming device, for a part to be formed to be shaped multiple feature structures；It is characterized by: the forming device Escape gas unit comprising a die unit, a cooling unit, an air cooling unit and one, the die unit is around out one It is a for accommodating the die cavity of the part to be formed, and the die cavity formed it is multiple do not contacted with the part to be formed, and to should at Shape part shapes the feature section of the feature structure, which includes multiple being set to the die unit and being arranged in this Cooling water channel around die cavity, the air cooling unit include multiple being opened on the die unit with being respectively facing the feature section And it is connected to the mouthpiece and multiple cooling gas accesses for being separately connected the mouthpiece and being used to supply cooling gas of the die cavity, institute It states mouthpiece and respectively corresponds the feature section, it includes multiple extending to the die cavity by the outer surface of the die unit that this, which escapes gas unit, And it is connected to the through-hole of the die cavity.

2. forming device according to claim 1, it is characterised in that: the die unit is including under a lower die and one and this Mould pairing and the upper mold for defining the die cavity jointly, the feature section are formed at the lower die and the upper mold and towards the moulds Cave, the mouthpiece of the air cooling unit are to be formed with respectively corresponding the feature section in the lower die and the upper mold, and being connected to should Die cavity, the through-hole are opened in the lower die and the upper mold outer surface respectively.

3. forming device according to claim 1, it is characterised in that: the die unit include a lower die and one with The lower die pairing and the upper mold for defining the die cavity jointly, the feature section are formed at the lower die and towards the die cavitys, should The mouthpiece of air cooling unit is to be formed with respectively corresponding the feature section in the lower die and be connected to the die cavity, the through-hole point It is not opened in the outer surface of the lower die.

4. forming device according to claim 1, it is characterised in that: the die unit include a lower die and one with The lower die pairing and the upper mold for defining the die cavity jointly, the feature section are formed at the upper mold and towards the die cavitys, should The mouthpiece of air cooling unit is to be formed with respectively corresponding the feature section in the upper mold and be connected to the die cavity, the through-hole point It is not opened in the outer surface of the upper mold.

5. a kind of forming device, for a part to be formed to be shaped a feature structure；It is characterized by: the forming device Escape gas unit comprising a die unit, a cooling unit, an air cooling unit and one, the die unit is around out one It is a and to form one for accommodating the die cavity of the part to be formed and do not contacted with the part to be formed, and to by the part to be formed at Shape goes out the feature section of this feature structure, which includes multiple being set to the die unit and being arranged in around the die cavity Cooling water channel, which includes one and is opened on the die unit towards this feature section and is connected to the die cavity Mouthpiece and one connect the mouthpiece and the cooling gas access for supplying cooling gas, the mouthpiece correspond to the characteristic area Section, it includes multiple extending to the die cavity by the outer surface of the die unit and being connected to the through-hole of the die cavity that this, which escapes gas unit,.

6. forming device according to claim 5, it is characterised in that: the die unit include a lower die and one with The lower die pairing and the upper mold for defining the die cavity jointly, this feature section are formed at the lower die and towards the die cavity, the gas The mouthpiece of cold unit be corresponding this feature section be formed in the lower die and be connected to the die cavity, the through-hole is opened under this respectively The outer surface of mould.

7. forming device according to claim 5, it is characterised in that: the die unit include a lower die and one with The lower die pairing and the upper mold for defining the die cavity jointly, this feature section are formed at the upper mold and towards the die cavity, the gas The mouthpiece of cold unit be corresponding this feature section be formed in the upper mold and be connected to the die cavity, the through-hole is opened on this respectively The outer surface of mould.

8. forming device according to claim 5, it is characterised in that: the through-hole is respectively communicated in the feature section On.