CN112077209A

CN112077209A - Prevent pressure flitch of thermoforming spare unloading in-process deformation

Info

Publication number: CN112077209A
Application number: CN202010810256.4A
Authority: CN
Inventors: 汪桂葆; 徐鑫山; 张洁; 邓远勇
Original assignee: Anhui Kezheng Mould Co ltd
Current assignee: Anhui Kezheng Mould Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2020-12-15

Abstract

The invention relates to a pressure plate for preventing deformation of a thermoformed part in the blanking process, which comprises a lower die and a male die insert arranged in the middle of the lower die, wherein a lower pressure plate is arranged on the lower die on one side of the male die insert, a plurality of nitrogen springs are arranged below the lower pressure plate, and a plurality of groups of locking mechanisms are arranged above the lower pressure plate; according to the invention, the time-delay nitrogen spring which is expensive and complex to install is replaced by the common nitrogen spring, so that the time-delay nitrogen spring in the common scheme is cancelled by the pressure source of the lower pressure plate, the requirement of a time-delay function is met by the locking mechanism, and the problem of part deformation caused by interaction of the upper pressure plate and the lower pressure plate is thoroughly solved while the safe production is ensured.

Description

Prevent pressure flitch of thermoforming spare unloading in-process deformation

Technical Field

The invention belongs to the field of automobile trial-production hot forming sample pieces, and particularly relates to the field of a pressure plate for preventing deformation of a B-column hot forming piece in the blanking process.

Background

At present, in the field of automobile trial heating and forming sample development, the stamping and forming of B-column hot forming parts are a great difficulty; the B-pillar hot forming part has a complex structure, the mold structure of the B-pillar hot forming part is more complex compared with that of a common hot forming mold, and the B-pillar hot forming process is usually completed by an up-down pressing mode; in order to ensure the quality of parts, an upper pressure source and a lower pressure source are provided by nitrogen springs; after the part is formed in the die, in the process of opening the die to take the part, the part of the upper pressure plate, which is not separated from the part body, always generates downward pressure on the formed product part through the nitrogen spring, and at the moment, the lower pressure source must adopt the time-delay nitrogen spring to prevent the lower pressure plate from generating upward thrust on the part, so that the formed part can be prevented from generating unfavorable deformation. When the return nitrogen spring of the upper pressure plate completely releases the stroke, the upper pressure plate continuously rises along with the upper slide block of the machine tool and completely leaves the plate, and the nitrogen spring starts to work and returns to the initial state when the upper pressure plate descends; although the principle of the process is simple, a special nitrogen spring with a time delay function needs to be purchased, the nitrogen spring is required to be connected in series from a nitrogen spring vendor, the price of the time delay nitrogen spring is more than 8 times of that of a common nitrogen spring, the development cost of the die is high, the development period is prolonged, and the time of 2 weeks is required only by connecting the nitrogen spring in series.

Disclosure of Invention

In order to solve the problems, the invention achieves the purposes through the following technical scheme:

the utility model provides a prevent flitch that presses of thermoforming unloading in-process deformation, includes the bed die, locates the terrace die insert at bed die middle part, be equipped with down the flitch on the bed die of one side that the terrace die was inserted, the below of flitch is equipped with a plurality of nitrogen springs down, it attaches the mechanism to be equipped with a plurality of locks of group to press the flitch top down.

As a further optimization scheme of the invention, the locking mechanism comprises a cover plate and double screws arranged on the cover plate, one end of the cover plate is fixed on the end part of one side of the die through the double screws, and the other side of the cover plate extends to the upper part of the lower pressure plate.

As a further preferable aspect of the present invention, the locking mechanism includes a rotating plate and a rotating pin provided on the rotating plate, one end of the rotating plate is fixed to one end of the lower die by the rotating pin, the other end of the rotating plate extends above the lower pressure platen, and the rotating plate rotates along an axis of the rotating pin.

As a further optimization scheme of the invention, the locking mechanism comprises a fixed seat fixedly arranged on one side of the die, a side pin is embedded on the fixed seat, the side pin is cylindrical, and an annular groove is arranged at a position close to the outer side end; the side pin clamping plate is arranged in the groove, the upper portion of the side pin clamping plate is fixedly connected with one end of the rotating shaft, the bottom of the side pin clamping plate is embedded in the annular groove, and a rotating handle is arranged at the other end of the rotating shaft.

As a further optimization scheme of the invention, fastening screws are symmetrically arranged at two end parts of the clamping plate base, and the clamping plate base is fixedly arranged on the fixed seat through the fastening screws.

In a further preferred embodiment of the present invention, the axis of the rotating shaft and the axis of the side pin are eccentrically disposed and are not on the same vertical line.

The invention has the beneficial effects that:

1) according to the invention, the delay nitrogen spring which is expensive and complex to install is replaced by the common nitrogen spring, so that the delay nitrogen spring in the common scheme is cancelled by the pressure source of the lower pressure plate, the requirement of a delay function is met by adopting the locking mechanism, and the problem of part deformation caused by interaction of the upper pressure plate and the lower pressure plate is thoroughly solved while the safe production is ensured;

2) by adopting the structure, the delay nitrogen spring can be cancelled, the investment cost of the die is reduced, and the trial production period of the part can be ensured.

Drawings

FIG. 1 is a schematic view of the position between a workpiece and upper and lower material pressing plates according to the present invention;

FIG. 2 is a schematic structural view of embodiment 1 of the present invention;

FIG. 3 is an enlarged partial schematic view of FIG. 2 at A in accordance with the present invention;

FIG. 4 is a schematic structural view of example 2 of the present invention;

FIG. 5 is an enlarged partial schematic view at B of FIG. 4 of the present invention;

FIG. 6 is a schematic perspective view of example 3 of the present invention, which is shown in FIG. 1;

FIG. 7 is a schematic perspective view of embodiment 3 of the present invention, FIG. 2;

fig. 8 is a schematic perspective view of a lock attachment mechanism in embodiment 3 of the present invention;

fig. 9 is a schematic cross-sectional view of the locking mechanism and the lower retainer plate according to embodiment 3 of the present invention;

in the figure: A. an upper pressing area; B. a material pressing area; 1. a lower die; 11. a male die insert; 12. pressing a material plate; 13. a workpiece; 2. a locking mechanism; 3. a cover plate; 31. double screws; 4. a rotating plate; 41. a rotation pin; 5. a fixed seat; 51. a side pin; 511. an annular groove; 6. a card board base; 61. a rotating shaft; 62. a groove; 63. a side pin snap-gauge; 64. rotating the handle; 65. and (5) fastening the screw.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Example 1

As shown in fig. 1 to 3, the pressure plate for preventing deformation in the blanking process of a thermoformed part comprises a lower die 1 and a punch insert 11 arranged in the middle of the lower die 1, wherein a workpiece 13 is covered on the punch insert, a lower pressure plate 12 is arranged on the lower die 1 on one side of the punch insert 11, a plurality of nitrogen springs are arranged below the lower pressure plate 12, and a plurality of groups of locking mechanisms 2 are arranged above the lower pressure plate 12; the locking mechanism 2 comprises a cover plate 3 and a double screw 31 arranged on the cover plate 3, one end of the cover plate 3 is fixed on one side end part of the lower die 1 through the double screw 31, and the other side of the cover plate 3 extends to the upper part of the lower material pressing plate 12;

when the device is used, the pressure source of the upper pressure plate is continuously provided with a common nitrogen spring as in the common scheme, the lower pressure source is changed into the common nitrogen spring as the pressure source, when the die is formed to the bottom, the two cover plates can be manually locked by using double screws, and the cover plates play a limiting role in the pressure of the lower pressure plate, so that the lower pressure plate is prevented from generating upward thrust on parts, and the formed parts are prevented from generating unfavorable deformation; the design structure is simple, the time-delay nitrogen spring is omitted, the cost is saved, and the manufacturing period is saved.

Example 2

According to the structure of the embodiment 1, the manual locking operation is realized by the combined action of the two screws and the cover plate, and the locking operation is completed and then the locking operation is quickly disassembled, so that the production rhythm is slowed down; therefore, as shown in fig. 4 and 5, the structure of the locking mechanism 2 is changed from that of embodiment 1, wherein the locking mechanism 2 of this embodiment includes a rotating pin plate and a rotating pin 41 provided on the rotating plate 4, one end of the rotating plate 4 is fixed to one side end of the lower mold 1 through the rotating pin 41, the other side of the rotating plate 4 extends above the lower pressure plate 12, and the rotating plate 4 rotates along the axis of the rotating pin 41;

when the device is used, the pressure source of the upper pressure pressing plate is the same as that of the common scheme, the common nitrogen spring is continuously adopted, the lower pressure source is changed into the common nitrogen spring as the pressure source, after the die is formed to the bottom, the lower pressure source is manually locked and attached under the action of the rotating plate and the pin, and meanwhile, the lower pressure source can be fixed through a screw, so that the rotating plate can be manually locked and attached around the rotating pin during locking, and therefore, the lower pressure pressing plate is prevented from generating upward thrust on parts, and the formed parts are prevented from generating unfavorable deformation; compared with the technical scheme of the embodiment 1, the design can at least reduce the manual repeated locking operation of one screw, simultaneously cancels the time delay nitrogen spring, and can save the cost and the manufacturing period.

Example 3

Furthermore, as the structure of the rotating plate and the rotating pin is adopted in the technical scheme of the embodiment 2, the fixing is carried out through one screw at most, the locking force of the structure is reduced compared with that of the embodiment 1, and certain potential safety hazard exists; therefore, as shown in fig. 6 to 9, on the basis of the structure of embodiment 1, the structure of the locking mechanism 2 is changed, wherein the locking mechanism 2 includes a fixed seat 5 fixedly disposed at one side of the mold, a side pin 51 and a card board base 6 disposed above the side pin 51 are embedded on the fixed seat 5, the side pin 51 is cylindrical, and an annular groove 511 is disposed at a position close to the outer end; the side pin 51 is mainly used for controlling the movement stroke of the pressing core during working, and it should be noted here that a circular hole is arranged on one side wall of the lower pressing plate 12 close to the fixed seat, and when locking is required, the end part of the side pin is embedded into the circular hole, so as to realize the locking function; fastening screws 65 are symmetrically arranged at two end parts of the clamping plate base 6, the clamping plate base 6 is fixedly arranged on the fixed seat 5 through the fastening screws 65, a rotating shaft 61 penetrates through the clamping plate base 6, a groove 62 is vertically arranged on one side surface, close to the fixed seat, of the clamping plate base 6, the transverse section of the clamping plate base is concave, a side pin clamping plate 63 is arranged in the groove 62, the upper part of the side pin clamping plate 63 is fixedly connected with one end of the rotating shaft 61, the bottom of the side pin clamping plate is embedded in the annular groove 511, and a rotating handle 64 is arranged at the other end of the rotating shaft; meanwhile, the axis of the rotating shaft 61 and the axis of the side pin 51 are arranged eccentrically, and the two axes are not on the same vertical line;

when the die is used, the pressure source of the upper pressure plate is the same as that of the common scheme, or a common nitrogen spring is adopted, the time delay nitrogen spring in the common scheme is cancelled in the pressure source of the lower pressure plate, and a side pin locking structure is adopted to replace the cover plate or the rotating plate in the scheme of the embodiment 1 or the embodiment 2, after the die is formed, the rotating handle is rotated to drive the rotating shaft to rotate, and meanwhile, the end part of the side pin 51 is pushed into the round hole of the lower plate 12, so that the lower end part of the side pin clamping plate is embedded in the annular groove, and under the limiting action of the front side wall and the rear side wall of the annular groove, the position of the side pin is just limited; thereby preventing the lower material pressing plate from generating upward thrust on the part and preventing the formed part from generating unfavorable deformation; compared with the embodiment 1 and the embodiment 2, the design has the advantages that the operation is simpler, the structure is more reliable, the problem of part deformation caused by interaction of the upper and lower pressure plates is thoroughly solved while the safety production is ensured, the delayed nitrogen spring can be omitted, the investment cost of the die is reduced, and the trial production period of the part can be ensured.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. The utility model provides a prevent pressure flitch that thermoformed part unloading in-process warp which characterized in that: the stamping die comprises a lower die (1) and a male die insert (11) arranged in the middle of the lower die (1), wherein a workpiece (13) is covered on the male die insert, a lower material pressing plate (12) is arranged on the lower die (1) on one side of the male die insert (11), a plurality of nitrogen springs are arranged below the lower material pressing plate (12), and a plurality of groups of locking mechanisms (2) are arranged above the lower material pressing plate (12).

2. The pressing plate for preventing deformation during blanking of thermoformed parts according to claim 1, wherein: the locking mechanism (2) comprises a cover plate (3) and double screws (31) arranged on the cover plate (3), one end of the cover plate (3) is fixed on the end part of one side of the lower die (1) through the double screws (31), and the other side of the cover plate (3) extends to the upper part of the lower pressure plate (12).

3. The pressing plate for preventing deformation during blanking of thermoformed parts according to claim 1, wherein: the locking mechanism (2) comprises a rotating plate (4) and a rotating pin (41) arranged on the rotating plate (4), one end of the rotating plate (4) is fixed on the end part of one side of the lower die (1) through the rotating pin (41), the other side of the rotating plate (4) extends to the upper part of the lower pressure plate (12), and the rotating plate (4) rotates along the axis of the rotating pin (41).

4. The pressing plate for preventing deformation during blanking of thermoformed parts according to claim 1, wherein: the locking mechanism (2) comprises a fixed seat (5) fixedly arranged on one side of the die, a side pin (51) is embedded on the fixed seat (5), the side pin (51) is cylindrical, and an annular groove (511) is formed in the position close to the outer side end; be equipped with cardboard base (6) on fixing base (5) of side round pin (51) top, run through on cardboard base (6) and be equipped with rotation axis (61), vertical recess (62) that are equipped with on the side that cardboard base (6) are close to the fixing base, be equipped with side round pin cardboard (63) in recess (62), the upper portion of side round pin cardboard (63) and the one end fixed connection of rotation axis (61), the bottom inlays and locates in annular groove (511), the other end of rotation axis (61) is equipped with twist grip (64).

5. The pressing plate for preventing deformation during blanking of thermoformed parts according to claim 4, wherein: fastening screws (65) are symmetrically arranged at two end parts of the clamping plate base (6), and the clamping plate base (6) is fixedly arranged on the fixed seat (5) through the fastening screws (65).

6. The pressing plate for preventing deformation during blanking of thermoformed parts according to claim 5, wherein: the axis of the rotating shaft (61) and the axis of the side pin (51) are arranged eccentrically, and the two axes are not on the same vertical line.