阅读说明：本技术 一种汽车发动机喷油泵体稳压杯座的加工工艺 (Machining process of pressure stabilizing cup seat of fuel injection pump body of automobile engine ) 是由 戴金美 于 2021-09-21 设计创作，主要内容包括：本发明公开了一种汽车发动机喷油泵体稳压杯座的加工工艺,其工艺步骤如下：1)多步拉伸；2)多步整形,对产品的高度、圆度与底部R角分多步慢慢缩小整形；3)侧冲孔,在产品侧面由外向内水平冲压,形成侧冲孔；4)侧冲孔毛刺面压倒角；5)预翻孔,预翻孔模具由内向外对侧冲孔进行预翻孔；6)翻孔,翻孔模具由内箱外对预翻孔进一步翻孔,使翻孔角度达到90度。本发明采用多步拉伸确保材料厚度变化在要求范围内,防止原材料在拉伸过程中厚度变薄而达不到要求,并且通过整形对产品的高度、圆度及底部R角慢慢缩小整形,使产品达到标准要求；对侧冲孔进行倒角处理,防止翻孔开裂,分两步翻孔,一步步分散翻孔力,避免开裂,保证翻孔顺利。(The invention discloses a processing technology of a pressure stabilizing cup holder of an oil injection pump body of an automobile engine, which comprises the following processing steps: 1) stretching in multiple steps; 2) shaping in multiple steps, namely, gradually reducing and shaping the height, the roundness and the bottom R angle of the product in multiple steps; 3) side punching, namely horizontally punching the side surface of the product from outside to inside to form side punching; 4) pressing a chamfer on the burr surface of the side punching hole; 5) pre-flanging, namely punching holes on the opposite sides of the pre-flanging die from inside to outside to perform pre-flanging; 6) and (4) hole flanging, wherein the hole flanging die further performs hole flanging on the pre-flanging hole from the outside of the inner box to enable the hole flanging angle to reach 90 degrees. The invention adopts multi-step stretching to ensure that the thickness change of the material is within the required range, prevents the raw material from being thinned in the stretching process and not meeting the requirement, and slowly reduces the height, the roundness and the bottom R angle of the product through shaping to ensure that the product meets the standard requirement; and chamfering is carried out on the side punching hole, so that hole flanging cracking is prevented, two-step hole flanging is adopted, hole flanging force is dispersed step by step, cracking is avoided, and smooth hole flanging is ensured.)

1. A processing technology of a pressure stabilizing cup holder of an oil injection pump body of an automobile engine is characterized in that: the process comprises the following steps:

1) multi-step stretching, namely three-step stretching, which respectively comprises the following steps:

the first step of stretching, the steel plate is stretched into a cylindrical product by the circular arc transition of the bottom R angles of the male die and the female die of the first forming die, the bottom of the product is the R angle and is stretched to the height required by the product,

the second step of stretching, the bottom R angle of the second forming die is reduced for stretching,

step three, stretching, wherein the bottom R angle of a third forming die is further reduced for stretching;

2) the shaping mold is used for gradually reducing and shaping the height, the roundness and the bottom R angle of the product in multiple steps, and comprises a first shaping mold, a second shaping mold and a third shaping mold, wherein the heights of the first shaping mold, the second shaping mold and the third shaping mold are gradually reduced, the roundness is gradually reduced, and the bottom R angle is gradually reduced until the height, the roundness and the bottom R angle of the product reach the standard;

3) side punching, namely horizontally punching the side surface of the product from outside to inside by using a punching die and forming a side punching hole on the side surface of the product;

4) pressing a chamfer on the burr surface of the side punching hole;

5) pre-flanging holes, namely punching holes from the opposite sides from inside to outside by using a pre-flanging die to perform pre-flanging, wherein the angle of the pre-flanging holes is 40-50 degrees;

6) hole flanging, namely further flanging the pre-flanging hole from the outside of the inner box by using a flanging die to ensure that the flanging angle reaches 90 degrees;

the processing die is a progressive die and is sequentially divided into a first forming die, a second forming die, a third forming die, a first shaping die, a second shaping die, a third shaping die, a punching die, a pressing chamfering die, a pre-hole flanging die and a hole flanging die.

2. The processing technology of the automobile engine oil injection pump body pressure stabilizing cup holder according to claim 1, characterized in that: and TD treatment is carried out on the female dies of the first forming die, the second forming die, the third forming die and the shaping die, the male die is made of DC53 high-speed powder steel materials, and the surfaces of the male die and the female die are smooth and the hardness of the male die and the female die reaches more than HRC67 degrees.

Technical Field

The invention relates to a processing technology of a pressure stabilizing cup seat of an oil injection pump body of an automobile engine.

Background

The pressure stabilizing cup seat is used for a fuel injection pump of a general automobile engine, belongs to a general platform part, and has higher requirements on the size of a product. At present, the pressure stabilizing cup base is stretched by stainless steel, the thickness of materials in the stretching process is reduced, the size of a product is not up to standard, the problem of flanging cracking can occur in the side flanging, and the rejection rate is high.

Disclosure of Invention

In view of the technical problems in the background art, the technical problem to be solved by the invention is to provide a processing technology of the automobile engine fuel injection pump body pressure stabilizing cup base, which can improve the product quality and the qualification rate.

In order to solve the technical problems, the invention adopts the following technical scheme: the processing technology of the pressure stabilizing cup seat of the oil injection pump body of the automobile engine is characterized in that: the process comprises the following steps:

1) multi-step stretching, namely three-step stretching, which respectively comprises the following steps:

the first step of stretching, the steel plate is stretched into a cylindrical product by the circular arc transition of the bottom R angles of the male die and the female die of the first forming die, the bottom of the product is the R angle and is stretched to the height required by the product,

the second step of stretching, the bottom R angle of the second forming die is reduced for stretching,

step three, stretching, wherein the bottom R angle of a third forming die is further reduced for stretching;

2) the shaping mold is used for gradually reducing and shaping the height, the roundness and the bottom R angle of the product in multiple steps, and comprises a first shaping mold, a second shaping mold and a third shaping mold, wherein the heights of the first shaping mold, the second shaping mold and the third shaping mold are gradually reduced, the roundness is gradually reduced, and the bottom R angle is gradually reduced until the height, the roundness and the bottom R angle of the product reach the standard;

3) side punching, namely horizontally punching the side surface of the product from outside to inside by using a punching die and forming a side punching hole on the side surface of the product;

4) pressing a chamfer on the burr surface of the side punching hole;

5) pre-flanging holes, namely punching holes from the opposite sides from inside to outside by using a pre-flanging die to perform pre-flanging, wherein the angle of the pre-flanging holes is 40-50 degrees;

6) hole flanging, namely further flanging the pre-flanging hole from the outside of the inner box by using a flanging die to ensure that the flanging angle reaches 90 degrees;

the processing die is a progressive die and is sequentially divided into a first forming die, a second forming die, a third forming die, a first shaping die, a second shaping die, a third shaping die, a punching die, a pressing chamfering die, a pre-hole flanging die and a hole flanging die.

And TD treatment is carried out on the female dies of the first forming die, the second forming die, the third forming die and the shaping die, the male die is made of DC53 high-speed powder steel materials, and the surfaces of the male die and the female die are smooth and the hardness of the male die and the female die reaches more than HRC67 degrees.

The method adopts multi-step stretching to ensure that the thickness change of the material is within a required range, the first step of stretching adopts R-angle arc transition to store the material, so as to prevent the raw material from being thinned to meet the requirement in the stretching process, the second step of stretching and the third step of stretching are performed with R-angle shrinkage step by step, and the height, the roundness and the bottom R-angle of the product are slowly reduced and shaped by shaping, so that the product meets the standard requirement; the side punching is chamfered, hole flanging cracking is prevented, hole flanging is divided into two steps of hole flanging and hole flanging, hole flanging force is dispersed step by step, cracking is avoided, and hole flanging is guaranteed to be smooth.

Drawings

FIG. 1 is a diagram of the processing steps of the present invention.

Fig. 2 is a schematic diagram of the product of the invention.

Figure 3 is a cross-sectional view of a product of the invention.

Detailed Description

The following describes details and operational principles of embodiments and examples of the present invention with reference to the drawings. The processing technology of the pressure stabilizing cup seat of the oil injection pump body of the automobile engine comprises the following processing steps:

1) multi-step stretching, namely three-step stretching, which respectively comprises the following steps: the steel plate is stretched into a cylindrical product by first-step stretching, wherein the bottom of the product is an R angle and is stretched to the height required by the product, the bottom R angle of a male die and the bottom R angle of a female die of a first forming die are subjected to arc transition, the bottom R angle of a second forming die is reduced and stretched, the bottom R angle of a third forming die is further reduced and stretched, the bottom R angles of the first forming die, the second forming die and the third forming die are reduced step by step, the materials are stored by the arc transition of the R angles, and the material thickness change is ensured in a required range by multi-step stretching, so that the thickness thinning of the raw materials in the stretching process is reduced, and the effect of equal-thickness stretching is achieved; 2) The shaping mold is used for gradually reducing and shaping the height, the roundness and the bottom R angle of the product in multiple steps, and comprises a first shaping mold, a second shaping mold and a third shaping mold, the heights of the first shaping mold, the second shaping mold and the third shaping mold are gradually reduced, the roundness is gradually reduced, and the bottom R angle is gradually reduced until the height, the roundness and the bottom R angle of the product reach the standard; 3) side punching, namely horizontally punching the side surface of the product from outside to inside by using a punching die, forming the side punching on the side surface of the product, wherein the burr surface of the punching is arranged in the product, so that the outside of the product cannot be influenced; 4) pressing and chamfering are carried out on the side punching burr surface, and the pressing and chamfering treatment is carried out on the product punching burr surface through a pressing and chamfering die, so that the inner wall is smooth, and preparation work is prepared for hole flanging; 5) pre-flanging holes, namely punching holes from the opposite sides from inside to outside by using a pre-flanging die to perform pre-flanging, wherein the angle of the pre-flanging holes is 40-50 degrees; 6) hole flanging, namely further flanging the pre-flanging hole from the outside of the inner box by using a flanging die to ensure that the flanging angle reaches 90 degrees; the problem of hole flanging fracture appears in the big easy hole flanging power of side, presses the chamfer to handle and then prevents the hole flanging fracture, and the hole flanging divides two steps to go on moreover, and one-step one step of hole flanging power, progressively realize the hole flanging, avoids the fracture, improves the success rate of hole flanging. The processing die is a progressive die and is sequentially divided into a first forming die, a second forming die, a third forming die, a first shaping die, a second shaping die, a third shaping die, a punching die, a chamfering die, a pre-flanging die and a flanging die; the progressive die processing improves the product precision, improves the production efficiency and reduces the production cost. Stainless steel product frictional force is big at tensile in-process, can cause the mould surface to have the drawing mark, can influence product quality finally, the die of first forming die, second forming die, third forming die and plastic mould carries out TD processing, and the terrace die adopts the high-speed powder steel material of DC53, and the smooth and hardness in surface of terrace die and die reaches more than HRC67, improves the life of mould, prevents that the mould surface from pulling to guarantee product quality.