CN112588959A

CN112588959A - Progressive die design of clamp part

Info

Publication number: CN112588959A
Application number: CN202011333754.0A
Authority: CN
Inventors: 潘家敬; 董运龙; 何燕; 郭怀志; 王晓楠
Original assignee: Qingdao University of Science and Technology
Current assignee: Qingdao University of Science and Technology
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-04-02

Abstract

The invention discloses a design of a hoop part progressive die, which comprises a male die, a female die, a stripper plate and a strip stock layout of the whole progressive die. All parts are combined together in an assembling mode and fixed through compression screws and positioning pins. The clamp parts have the characteristics of precision and thinness, have high requirements on the material, the processing mode and the heat treatment process of workpieces, can overcome the accumulation of errors caused by multiple times of processing of a single die by adopting the progressive die for processing, simplifies the workload of production personnel, improves the production efficiency of the precise and thin clamp parts, and realizes the large-scale batch production of the clamp parts.

Description

Progressive die design of clamp part

Technical Field

The invention relates to the technical field of punch forming of parts, and particularly designs a progressive die of a hoop part based on a die stamping process.

Background

The punching forming process is a processing mode of a workpiece with certain size, shape and performance by applying external force to a blank through a die to cause the blank to generate plastic deformation or separation. The process can be used for manufacturing and processing workpieces with complex shapes and excellent performance, and has the characteristics of simple operation, high production efficiency and high material utilization rate.

A multi-station progressive die is a punch forming die for mass production of workpieces with complex structures. The part is divided into a plurality of stations with the same distance between workers for processing through continuously processing the plate with the fixed thickness, the processing technology of each station is different from that of the first station, and the punch forming of the part is completed through continuous processing. The multi-station progressive die is combined with various high-speed punches to realize rapid automatic production, thereby greatly improving the production speed. The method has great significance in the aspects of improving the production efficiency of the workpiece, reducing the production cost of the workpiece, realizing automatic production and the like.

The clamp parts have the characteristics of fineness and thinness, and have high requirements on the materials, the processing mode and the heat treatment process of workpieces. The clamp parts are more in stamping process and higher in requirements on assembly and machining, and the traditional workpiece forming method is probably not suitable for machining the clamp parts in a large batch, so that the clamp parts are machined and formed by adopting a progressive die method.

Disclosure of Invention

The clamp part has high requirements on the material, the processing mode and the heat treatment process of a workpiece, and the processing process has more steps; the requirements on precision during assembly and processing are high, the selected blanking gap is small, and the die is difficult to adjust. The invention designs a progressive die for a clamp part based on a die stamping process, which mainly comprises a forming insert (a male die and a female die), a fixing plate, a floating pin, a positioning pin and a discharging plate. The top of the male die and the punch-die fixing plate are positioned on the same plane, the female die and the fixing plate are assembled together and positioned in the same plane with the lower section of the die, and the parallelism of the female die and the male die is ensured by adopting the same grinding standard.

The technical scheme of the invention is realized as follows:

a progressive die design for a ferrule part comprising:

(1) an upper die (male die) portion of the progressive die;

(2) a lower die (female die) part of the progressive die;

(3) a stripper plate apparatus for a progressive die.

(4) A strip sample plate device of a progressive die.

A progressive die design for a clamp part comprises an upper die base part for fixing a male die, a lower die base part for fixing a female die, a stripper plate and a strip sample plate. The upper die base part is positioned at the upper half part of the whole progressive die frame, the lower die base part is positioned at the lower half part of the whole progressive die frame, and the middle part of the upper die base part is connected with a screw through a punch.

The male die is processed in a straight-through type special-shaped male die design mode and a linear cutting mode.

The female die is processed in a boring mode due to the fact that the processed part hole is small.

The specific design method of the stripper plate and the punch-die fixing plate needs to be determined according to the shape and the precision requirement of the hole. For the round hole, a turning machining method can be adopted, and for the rectangular and special-shaped holes, a milling or wire cutting machining method can be adopted. In order to ensure the pitch accuracy of the circular hole system, a coordinate boring processing method is generally adopted.

The upper die part and the lower die part are mainly assembled together in an assembling mode. During assembly, a correct assembly reference is provided, the assembly reference is coincident with the machining reference as much as possible, and the reference surface and the reference hole are selected as reference as much as possible.

The guiding part of the upper die (male die) part is arranged on the circular insert with the shoulder. The round insert without the shoulder is arranged into a round angle, so that the positioning effect is achieved, and the reverse installation during the assembly is avoided.

When the female die of the lower die (female die) part is assembled with the fixed plate, the lower end face and the fixed plate are in the same grinding standard with the male die, parallelism is guaranteed, and the assembly mode of the lower die (female die) part is the same as that of the upper die.

The advantages of the invention are as follows:

the progressive die for the hoop part has the characteristics of high machining efficiency, high automation degree and high self precision. The direct contact between an operator and a machined part is avoided, the error of part machining is reduced, the workload of production personnel is simplified, the abrasion of a die is greatly reduced, and the wide large-scale production of the clamp parts can be realized.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings required for the technical examples will be briefly described below.

Fig. 1 is a part assembly diagram of a multi-station progressive die.

Fig. 2 is a simplified schematic of a clip component.

FIG. 3 is a schematic structural view of a straight-through type anisotropic punch.

Fig. 4 is a schematic structural view of a multi-station progressive die.

Fig. 5 is a schematic view of a multi-station progressive die insert.

Fig. 6 is a simplified schematic diagram of a multi-station progressive die strip material pattern.

Figure 1. upper die (male die); 2. a stripper plate; 3. a lower die (female die); 4. a pilot pin; 5. an insert; 6. and a limiting screw.

Detailed Description

The device disclosed by the invention comprises an upper die 1 of a multi-station progressive die, a stripper plate 2, a lower die 3, a guide pin 4, an insert 5 and a limit screw 6, as shown in figure 1.

The device of the invention assembles each part of the mould into the mould frame by an assembling mode. The assembly of the upper die 1, the lower die 3 and the stripper plate 2 plays an important role in the assembly of the multi-station progressive die, and the assembly precision of the three plates and the manufacturing precision of the insert 5 determine the quality of the whole set of multi-station progressive die. During assembly, the reference surface and the reference hole are selected as references, and the assembly reference is superposed with the machining reference. The insert 5 is assembled with an interference, and is fastened with a pin or a fastening screw after the insertion is completed.

And selecting a plane where the fixing plate of the female die 3 is located as a reference plane, fixing the lower die 3 on a lower die seat, and inserting a short cylindrical pin for positioning after the inspection is finished. The male die 1 and the pilot pin 4 are firstly installed on the fixed plate, and then the stripper plate 2 is installed. In order to ensure the guide effect and avoid the strip belt from being blocked, the effective length of the guide pin 4 must not be less than the diameter of the guide pin. After all parts are installed, the parts are compacted. Then, the stripper plate 2, a spring and other parts are installed, and limit screws 6 are installed on the upper die base and the lower die base. And finally, performing pilot punching by using an assembly machine under the condition of meeting production conditions, and measuring and detecting whether the workpiece produced by the pilot punching is qualified or not after the pilot punching is completed. And if the mold is unqualified, the mold opening is required to be adjusted again or the whole mold is required to be reinstalled, and then the positioning pin is installed.

Claims

1. The utility model provides a clamp part upgrades mould design, includes last mould (terrace die), lower mould (die), stripper and strip model device of whole mould structure, the mould that upgrades all parts of mould realize the operation of mould together through the mode cooperation of assembly, and then reach the purpose of mass production preparation clamp part.

2. The male die part of the upper die of claim 1, which is designed in a straight-through type special-shaped male die mode, and is machined in a linear cutting mode. And the female die part of the lower die is processed in a boring mode due to the fact that the processed part hole is small.

3. The stripper plate and punch and die holder plate of claim 1, wherein the specific design method is determined according to the shape and precision of the holes. For circular holes, in order to ensure the pitch accuracy of circular hole systems, a coordinate boring method is generally selected.

4. During assembly, the upper part and the lower part are subjected to mold closing and opening for multiple times to ensure the assembly precision. The large-scale progressive die is assembled through the assembling machine, and the condition that workers are injured due to manual assembly is prevented. After the adjustment for many times is completed, the pressure on the assembly machine is used for firstly carrying out test stamping, and finally, the movement of the die is checked.