阅读说明：本技术 带有活动刀口的板料冲裁模具 (Plate blanking die with movable knife edge ) 是由 罗栋 马启涛 修红芳 陈�胜 马学张 陈芳芳 熊克友 赵建林 华露明 钟业良 卢 于 2021-10-14 设计创作，主要内容包括：本发明公开了一种带有活动刀口的板料冲裁模具,本发明的主要设计构思在于,根据纵梁塌角产生的机理,设计全新的适合较厚板料落料冲裁的落料模,尤其地,通过设计活动废料刀动程、氮气弹簧的选用,构建多段拼接式刀口之间的配合关系,实现根据模具行程自适应调节刀口位置,并由静、动两种刀口完成规整、高效的切料动作。通过本发明技术方案,在不需要违背自动化生产需求的情况下,由全新的刀口结构能够彻底解决厚板切边模具在冲裁时产生毛刺、塌角等问题,由此还可以提高纵梁质量,避免由于塌角处纵梁应力集中而产生的纵梁断裂风险。(The invention discloses a sheet blanking die with a movable knife edge, which is mainly designed according to the mechanism of the generation of collapse angles of longitudinal beams, and is suitable for blanking and blanking thick sheets. According to the technical scheme, under the condition that the requirement of automatic production is not violated, the problems of burrs, corner collapse and the like generated during blanking of the thick plate trimming die can be thoroughly solved through the brand-new knife edge structure, so that the quality of the longitudinal beam can be improved, and the risk of fracture of the longitudinal beam caused by stress concentration of the longitudinal beam at the corner of the collapsed position is avoided.)

1. The utility model provides a sheet material blanking die with activity edge of a knife which characterized in that includes: the device comprises an upper template, a cover plate, a nitrogen spring, a female die knife edge fixing seat, a base plate, a multi-section assembled female die knife edge and a waste knife;

the multi-section assembled female die knife edge comprises a first static female die knife edge and a second static female die knife edge adjacent to the movable female die knife edge, wherein the first static female die knife edge is used for being matched with the waste material knife to cut off waste materials;

the upper template is fixed on the upper die frame and used for fixing the female die knife edge fixing seat;

the female die cutter edge fixing seats are two in number, are fixedly connected with the upper template respectively and are used for fixing a first static female die cutter edge and a second static female die cutter edge;

the nitrogen spring is fixedly arranged in the female die knife edge fixing seat through a cover plate, wherein a telescopic rod of the nitrogen spring is vertically arranged;

the first static female die cutter edge and the second static female die cutter edge are respectively arranged on the female die cutter edge fixing seat through a base plate; the contact position of the movable female die cutter edge and the second static female die cutter edge adopts a dovetail groove structure; the top surface of the movable female die knife edge is connected with a telescopic rod of the nitrogen spring, and two sides of the movable female die knife edge are respectively contacted with the first static female die knife edge and the second static female die knife edge.

2. The sheet blanking die with the movable knife edge as claimed in claim 1, wherein an L-shaped step is further provided at a contact position of the movable die knife edge and the second static die knife edge, and the L-shaped step is used for limiting the vertical direction of the movable die knife edge.

3. The blanking die for sheet stock with movable knife-edges of claim 1, wherein the shim plate is of a segmented construction.

4. The sheet blanking die with the movable knife edge according to claim 1, wherein the movable die knife edge is assembled with the second static die knife edge in a close fit.

5. The sheet blanking die with the movable knife edge according to claim 1, wherein the first static female die knife edge and the second static female die knife edge are respectively fixed on the ventral surface of the female die knife edge fixing seat by bolts.

6. The sheet blanking die with the movable knife edge as claimed in claim 1, wherein the two female die knife edge holders are fixed to the front and rear sides of the upper die plate by bolts, respectively.

7. The sheet blanking die with the movable knife edge as claimed in claim 1, wherein the nitrogen spring is fixedly installed in the die knife edge fixing seat together with the cover plate through bolts.

8. The blanking die for sheet metal with the movable knife edge as claimed in any one of claims 1 to 7, wherein the upper die plate is fixed on the upper die frame by bolts.

Technical Field

The invention relates to the field of vehicle manufacturing, in particular to a sheet blanking die with a movable knife edge.

Background

The thickness of the longitudinal beam of the commercial vehicle frame is generally 5-10mm, the longitudinal beam is a high-strength steel plate, and a blanking die is adopted in the industry for production. Along with the popularization of intelligent manufacturing, the blanking process of the commercial vehicle frame longitudinal beam is also fully automated, but the contradiction between the existing mold structure and the automated production is increasingly obvious.

In the industry, the existing frame rail blanking die only has one pair of waste material cutters, however, in order to realize full-automatic production, the number of the waste material cutters of the frame rail blanking die is increased to dozens of pairs, and the edges of the waste material cutters need to both scrap and cut off waste materials.

As shown in fig. 1, when the conventional blanking die works, an upper slide block of a press machine drives an upper knife edge to move downwards, so that the upper knife edge and a lower knife edge (a die knife edge) are contacted, most of rim charge is sheared along with the downward movement of an upper die, only a plate near a waste knife is left, and because the upper knife edge needs to avoid the waste knife below, a contact point of the upper knife edge and the lower knife edge in an avoidance area is moved upwards, so that the contact of the upper knife edge and the lower waste knife edge is prior to the contact of the upper knife edge and the lower knife edge in the avoidance area, and as shown in fig. 2 and 3, before the plate in a point c ring is sheared, points a and b are contacted with the waste knife, and under the action of the points a and b, the plate in the point c ring is not sheared by the upper knife edge and the lower knife edge and is torn off, so that burrs and collapse angles are generated at the plate of a longitudinal beam.

At present, the solution idea for avoiding local corner collapse in the blanking of the longitudinal beam of the commercial vehicle frame is to reduce the fall of the knife edge of the waste material knife area, so that the fall of the knife edge of the female die of the waste material knife avoiding area is reduced and becomes slow in the vertical direction. However, as the waste material knife exists in the lower die part, the lower die part cannot avoid the die edge, and the knife edge fall always exists, and the analysis on the mechanism of forming the collapse angle can show that the fall of the upper die edge is the main reason for causing the collapse angle of the longitudinal beam plate, so that the currently adopted mode of reducing the fall of the die edge only reduces the collapse angle phenomenon, and cannot fundamentally eliminate the collapse angle.

Disclosure of Invention

In view of the above, the invention aims to provide a sheet blanking die with a movable knife edge, so as to thoroughly solve the problem that burrs and collapse angles are generated on longitudinal beam sheets when a female die knife edge is used for trimming.

The technical scheme adopted by the invention is as follows:

the utility model provides a sheet material blanking die with activity edge of a knife, includes wherein: the device comprises an upper template, a cover plate, a nitrogen spring, a female die knife edge fixing seat, a base plate, a multi-section assembled female die knife edge and a waste knife;

the multi-section assembled female die knife edge comprises a first static female die knife edge and a second static female die knife edge adjacent to the movable female die knife edge, wherein the first static female die knife edge is used for being matched with the waste material knife to cut off waste materials;

the upper template is fixed on the upper die frame and used for fixing the female die knife edge fixing seat;

the female die cutter edge fixing seats are two in number, are fixedly connected with the upper template respectively and are used for fixing a first static female die cutter edge and a second static female die cutter edge;

the nitrogen spring is fixedly arranged in the female die knife edge fixing seat through a cover plate, wherein a telescopic rod of the nitrogen spring is vertically arranged;

the first static female die cutter edge and the second static female die cutter edge are respectively arranged on the female die cutter edge fixing seat through a base plate; the contact position of the movable female die cutter edge and the second static female die cutter edge adopts a dovetail groove structure; the top surface of the movable female die knife edge is connected with a telescopic rod of the nitrogen spring, and two sides of the movable female die knife edge are respectively contacted with the first static female die knife edge and the second static female die knife edge.

In at least one possible implementation manner, an L-shaped step is further arranged at the contact position of the movable female die knife edge and the second static female die knife edge, and the L-shaped step is used for limiting the vertical direction of the movable female die knife edge.

In at least one possible implementation, the shim plate is of a segmented construction.

In at least one possible implementation, the movable die edge fits snugly against the second static die edge.

In at least one possible implementation manner, the first static female die edge and the second static female die edge are respectively fixed on the ventral surface of the female die edge fixing seat by bolts.

In at least one possible implementation manner, the two female die knife edge fixing seats are respectively fixed on the front side and the rear side of the upper template through bolts.

In at least one possible implementation manner, the nitrogen spring is fixedly installed in the female die knife edge fixing seat together through a bolt and a cover plate.

In at least one possible implementation manner, the upper die plate is fixed on the upper die frame by bolts.

The main design concept of the invention is that a brand-new blanking die suitable for blanking and blanking thicker plates is designed according to the mechanism of collapse angle generation of the longitudinal beam, particularly, the matching relation between the multi-section spliced type knife edges is constructed by designing the stroke of the movable waste knife and selecting the nitrogen spring, the self-adaptive adjustment of the knife edge position according to the stroke of the die is realized, and the regular and efficient blanking action is completed by a static knife edge and a movable knife edge. According to the technical scheme, under the condition that the requirement of automatic production is not violated, the problems of burrs, corner collapse and the like generated during blanking of the thick plate trimming die can be thoroughly solved through the brand-new knife edge structure, so that the quality of the longitudinal beam can be improved, and the risk of fracture of the longitudinal beam caused by stress concentration of the longitudinal beam at the corner of the collapsed position is avoided.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of a conventional blanking die and a blade;

FIG. 2 is a schematic diagram of a mechanism of corner collapse generation based on a conventional blanking die and a knife edge;

FIG. 3 is a view taken along line A-A of FIG. 2;

fig. 4 is a schematic structural diagram of a sheet blanking die with a movable knife edge according to an embodiment of the present invention;

fig. 5 is a schematic view of a sheet blanking die with a movable knife edge according to an embodiment of the present invention in a compressed state.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

The invention provides an embodiment of a sheet blanking die with a movable knife edge, which is specifically shown in fig. 4 and 5, and comprises the following components: the die comprises an upper die plate 1, a cover plate 2, a nitrogen spring 3, a female die knife edge fixing seat 4, a base plate 5, a first static female die knife edge 6-1, a second static female die knife edge 6-2, a movable female die knife edge 7 and a waste knife 8.

The female die knife edge provided by the invention is of a multi-section assembled structure, and specifically comprises a first static female die knife edge 6-1 and a second static female die knife edge 6-2 adjacent to a movable female die knife edge 7, wherein the first static female die knife edge 6-1 is used for being matched with a waste material knife 8 to cut off waste materials.

The upper template 1 is fixed on the upper die frame by bolts and plays a role in fixing the female die knife edge fixing seat 4. The female die knife edge fixing seats 4 are two in number and are fixed on the front side and the rear side of the upper template 1 through bolts, and the function of fixing the first static female die knife edge 6-1 and the second static female die knife edge 6-2 is achieved.

The nitrogen spring 3 is fixedly arranged in the female die knife edge fixing seat 4 together through a bolt and the cover plate 2, wherein the telescopic rod of the nitrogen spring 3 can vertically move. The first static female die cutter edge 6-1 and the second static female die cutter edge 6-2 are respectively arranged on the female die cutter edge fixing seat 4 through bolts and a backing plate 5 (the backing plate 5 is provided with a nitrogen avoiding spring 3, and is preferably in a sectional type), the first static female die cutter edge and the second static female die cutter edge are preferably fixed on the ventral surface of the female die cutter edge fixing seat 4 through bolts, the movable female die cutter edge 7 and the second static female die cutter edge 6-2 are mutually matched and connected through a dovetail groove structure, and an L-shaped step is further arranged at the contact part of the two cutter edges and can limit the vertical direction of the movable female die cutter edge 7; the top surface of the movable female die knife edge 7 is connected with a telescopic rod of the nitrogen spring 3 (the movable female die knife edge 7 can be driven by the nitrogen spring to vertically move up and down), and two sides of the movable female die knife edge 7 are respectively contacted with the first static female die knife edge 6-1 and the second static female die knife edge 6-2, preferably, the movable female die knife edge 7 is closely contacted with the second static female die knife edge 6-2 (the two are closely assembled).

The working process of the foregoing embodiments can be referred to as follows:

before the movable die cutter edge 7 is not contacted with the material sheet, the nitrogen spring 3 is not stressed, and a continuous curve is formed by the movable die cutter edge 7 and the cutting edges of two adjacent static die cutter edges, as shown in fig. 4. After the trimming action is finished, along with the increase of the stroke of the die, the force provided by the nitrogen spring 3 is not enough to support the movable female die knife edge 7 to continuously keep a relatively fixed state, namely, the movable female die knife edge 7 vertically moves upwards, as shown in fig. 5, at the moment, the waste material knife part at the first static female die knife edge 6-1 is exposed, and along with the continuous increase of the stroke of the die, the first static female die knife edge 6-1 and the waste material knife 8 are matched to complete the complete cutting of the waste material.

In summary, the main design concept of the invention is to design a brand-new blanking die suitable for blanking and blanking thicker plates according to the mechanism of the collapse angle of the longitudinal beam, and particularly, the matching relationship between the multi-section spliced knife edges is constructed by designing the moving stroke of the movable waste knife and selecting the nitrogen spring, so that the self-adaptive adjustment of the knife edge position according to the die stroke is realized, and the regular and efficient blanking action is completed by the static knife edge and the movable knife edge. According to the technical scheme, under the condition that the requirement of automatic production is not violated, the problems of burrs, corner collapse and the like generated during blanking of the thick plate trimming die can be thoroughly solved through the brand-new knife edge structure, so that the quality of the longitudinal beam can be improved, and the risk of fracture of the longitudinal beam caused by stress concentration of the longitudinal beam at the corner of the collapsed position is avoided.

In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.

The structure, features and effects of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the above embodiments are merely preferred embodiments of the present invention, and it should be understood that technical features related to the above embodiments and preferred modes thereof can be reasonably combined and configured into various equivalent schemes by those skilled in the art without departing from and changing the design idea and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, and all the modifications and equivalent embodiments that can be made according to the idea of the invention are within the scope of the invention as long as they are not beyond the spirit of the description and the drawings.