Die structure for bending and leveling turnover box frame

Abstract

The utility model provides a mold structure for bending and leveling a turnover box frame, which relates to the field of integrated mold processing tools and comprises a sharp knife upper mold, a lower mold upper part matched with the sharp knife upper mold, a lower mold lower part movably connected outside the lower mold upper part, a positioning bolt for connecting the lower mold upper part and the lower mold lower part, and a pressure spring sleeved outside the positioning bolt, a V-shaped groove is formed in the upper surface of the lower die upper part; the lower die upper piece can move downwards relative to the lower die lower piece. A cylindrical groove A is formed in the lower portion of the upper die upper piece, a countersunk bolt hole is formed in the lower surface of the lower die lower piece, a cylindrical groove B corresponding to the groove A in position is inwards formed in the middle of the lower die lower piece, and the two grooves are opposite in position. The mold can replace two single tools, two-step operation on one mold is achieved, materials used for manufacturing the tools are saved, and labor cost is also reduced; and meanwhile, frequent tool replacement is avoided, time is saved, working efficiency is improved, and the position of the workpiece is convenient to adjust.

Description

Technical Field

[0001] The utility model relates to the field of integrated mold processing tooling, in particular to a mold structure used for bending and flattening a frame of a turnover box. Background Art

[0002] Product panel components are widely used in metal turnover box products. For safety reasons, the above-mentioned product panels cannot have sharp edges around them during use, so during the turnover box processing, it is required to bend and flatten the panels around them to remove the sharp edges at the four corners of the turnover box. The original processing procedure is to complete the semi-finished product of the product panel in two steps on two molds. The specific steps are: first, use a bending mold to bend the edge of the turnover box to a certain angle, and then use another stamping mold to flatten and compact it. This way, the mold turnover time is long, the processing process is complicated, and the product needs to be transferred between different molds, which greatly affects the production efficiency of the product.

[0003] For example, the utility model patent with publication number CN212019017U discloses a bending machine flattening auxiliary support structure, including a base, a support plate fixedly connected to the right side of the top of the base, an electrical room fixedly connected to the top of the support plate, a hydraulic telescopic rod at the bottom of the electrical room, a pressure plate connected to the hydraulic telescopic rod, a flattening assembly connected to the end face of the pressure plate, a groove at the top of the base, L-shaped fixing plates on both sides of the base, fixing bolts passing through the L-shaped fixing plates, multiple groups of threaded holes on both sides of the base, fixing bolts and threaded holes are screwed together, and a control panel is provided on the end face of the base. The device needs to be connected to a special bending machine. Although it realizes integrated stamping operation and improves the efficiency of bending and flattening, due to the complex mold structure and the need for hydraulic power, the lifting accuracy is not high, and it is not suitable for the fixing and processing of turnover box products. Utility Model Content

[0004] The utility model aims to provide a mold structure which can be used for bending and flattening the frame of a turnover box in an integrated operation, so as to solve the problems mentioned in the background technology.

[0005] To achieve the above-mentioned purpose, the following method is adopted: a mold structure for bending and flattening the frame of a turnover box, including a sharp knife upper mold, a lower mold upper piece matching the sharp knife upper mold, a lower mold lower piece movably connected to the lower mold upper piece, a positioning bolt connecting the lower mold upper piece and the lower mold lower piece, and a compression spring sleeved on the positioning bolt, a V-shaped groove is opened in the middle of the upper surface of the lower mold upper piece; the lower mold upper piece can move up and down relative to the lower mold lower piece under the deformation action of the compression spring; the positioning bolt serves to connect the lower mold upper piece and the lower mold lower piece.

[0006] A groove A is provided in the middle of the lower part of the upper mold upper piece, a countersunk bolt hole is provided on the lower surface of the lower mold lower piece, and a groove B is provided in the middle of the countersunk bolt hole; the compression spring is installed between the upper end surface of the groove A and the lower end surface of the groove B.

[0007] Specifically, the positioning bolt is divided into three parts from top to bottom: a threaded part, an intermediate part and a bolt head. The bolt head is connected with the lower mold lower part through clearance fit, the intermediate part extends into the groove A of the lower mold upper part, and the threaded part is connected with the lower mold upper part through thread fit. The positioning bolt can move up and down in the lower mold lower part, and the lowest position of the positioning bolt is higher than the lower surface of the lower mold lower part to prevent the lower mold lower part from being separated from the lower mold upper part.

[0008] Preferably, the cutting edge angle of the sharp knife upper die is thirty degrees.

[0009] Preferably, the groove A and the groove B are cylindrical, and their inner diameters are the same.

[0010] It should be particularly pointed out that the mold tooling uses a single-step method to perform an integrated molding operation on the workpiece, and is a type of universal mold; and this mold is an independently used mold and does not need to be used in conjunction with a bending machine.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] This universal mold can replace a single tooling and complete two steps on one mold, saving the material cost and labor cost of manufacturing the tooling. At the same time, the production site does not need to change the tooling when using this universal tooling to produce products, which greatly saves processing time, improves work efficiency, reduces transportation management costs, and makes it more convenient to adjust the position of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an overall structural diagram of an embodiment of the utility model;

[0014] Figure 2 It is a cross-sectional view of the lower part of an embodiment of the utility model;

[0015] Figure 3 This is a connection diagram of the lower mold upper part and the positioning bolts in an embodiment of the utility model.

[0016] In the figure, 1- sharp knife upper die, 2- lower die upper piece, 3- lower die lower piece, 4- positioning bolt, 5- compression spring, 6- V-shaped groove, 7- groove A, 8- countersunk bolt hole. DETAILED DESCRIPTION

[0017] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only a part of the preferred embodiments, not all embodiments, and cannot be used as any limitation to the present invention. The protection scope of the present invention is determined by the claims and their equivalents.

[0018] Example: See Figure 1-Figure 3 A mold structure for bending and flattening the frame of a turnover box, comprising a sharp knife upper mold 1 with a cutting edge angle of thirty degrees, a lower mold upper piece 2 matching the sharp knife upper mold, a lower mold lower piece 3 movably connected to the outside of the lower mold upper piece, a positioning bolt 4 installed between the lower mold upper piece and the lower mold lower piece, and a compression spring 5 sleeved thereon, a V-shaped groove 6 of a certain depth is opened in the middle of the upper surface of the lower mold upper piece 2 according to the specific angle that needs to be bent according to the specifications of the product panel frame; the lower mold upper piece 2 can move up and down relative to the lower mold lower piece 3 under the deformation action of the compression spring 5, and the positioning bolt 4 movably connects the lower mold upper piece 2 and the lower mold lower piece 3.

[0019] A cylindrical groove A7 is formed at the lower portion of the lower die upper piece 2 , a cylindrical countersunk bolt hole 8 is formed at the lower surface of the lower die lower piece 3 , and a cylindrical groove B is formed at the middle portion of the countersunk bolt hole 8 .

[0020] The two grooves are located opposite to each other and have the same inner diameter.

[0021] The positioning bolt 4 is divided into a threaded portion, a middle portion and a bolt head from top to bottom. The bolt head is loosely fitted with the lower mold lower part 3 and is located in the countersunk bolt hole 8. The middle portion is located between the lower mold upper part 2 and the lower mold lower part 3, and the threaded portion is threadably fitted with the lower mold upper part 2.

[0022] During operation, the frame of the panel of the turnover box product is placed on the V-groove on the upper surface of the lower mold upper part 2, and then the sharp knife upper mold 1 is used to directly perform the stamping operation. After that, the lower mold upper part 2 is further moved downward, and the frame of the panel is flattened between the sharp knife upper mold 1 and the lower mold upper part 2. The one-piece molding operation of the product panel is completed simply and quickly. Moreover, under the buffering effect of the compression spring 5, the product rebound force is partially offset by the compression spring 7. After the lower mold upper part 2 is reset, the processing operation of the product panel is completed. After the application of this mold, the yield rate can be better guaranteed and the scrap rate can be greatly reduced.

[0023] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A mold structure for bending and flattening a turnover box frame, comprising a sharp knife upper mold (1), a lower mold upper piece (2) matching the sharp knife upper mold, and a lower mold lower piece (3) movably connected to the outer part of the lower mold upper piece, characterized in that: It also includes a positioning bolt (4) located between the lower die upper part and the lower die lower part, and a compression spring (5) sleeved on the outside of the positioning bolt (4); a V-shaped groove (6) is opened in the middle of the upper surface of the lower die upper part (2); the lower die upper part (2) can move up and down relative to the lower die lower part (3) under the deformation of the compression spring (5).

2. The mold structure for bending and flattening the frame of a turnover box according to claim 1 is characterized in that: The positioning bolt (4) is composed of a threaded portion, a middle portion and a bolt head from top to bottom, and is used to connect the lower mold upper part (2) and the lower mold lower part (3); The bolt head is connected with the lower die lower part (3) by clearance fit; the middle part is located between the lower die upper part (2) and the lower die lower part (3), and the threaded part is connected with the lower die upper part (2) by thread fit.

3. The mold structure for bending and flattening the frame of a turnover box according to claim 2 is characterized in that: A groove A (7) is provided in the middle of the lower part of the lower die upper part (2); a countersunk bolt hole (8) is provided on the lower surface of the lower die lower part (3); a groove B is provided in the middle of the countersunk bolt hole (8); the groove A (7) and the groove B are positioned opposite to each other; The compression spring (5) is installed between the upper end surface of the groove A (7) and the lower end surface of the groove B; The bolt head can move up and down in coordination with the deformation process of the compression spring (5), and its lowest position is higher than the lower surface of the lower die lower part (3) to prevent the lower die lower part (3) from separating from the lower die upper part (2).

4. The mold structure for bending and flattening the frame of a turnover box according to claim 1 is characterized in that: The cutting edge angle of the sharp knife upper die (1) is thirty degrees.

5. The mold structure for bending and flattening the frame of a turnover box according to claim 3 is characterized in that: The groove A (7) and the groove B are cylindrical, and the inner diameters of the two are the same.

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