CN204276638U - A kind of diel - Google Patents

Abstract

In order to overcome the problems of low precision, low efficiency and high production cost of the salad hole manufacturing method in the prior art, the utility model provides a stamping die, which includes an upper mold frame, a lower mold frame and a leading column; The main pillar is installed on the lower mold frame, the upper guide pillar is provided with a leading hole, the leading hole is provided with a leading sleeve, and the upper end of the leading pillar is assembled into the leading sleeve; wherein, it also includes a Punch and die inserts; a die is fixed above the lower die frame, and a punch fixing plate and a stripping plate are fixed below the upper die frame in turn; the die insert is arranged on the die On, the die insert is provided with punching holes. Eliminates the influence of accuracy differences when multiple processes repeat positioning, reduces the number of manpower, equipment and molds used, improves efficiency, and greatly reduces the production cost of salad holes.

Description

A stamping die

technical field

The utility model relates to the field of stamping dies, in particular to the field of stamping dies for making salad holes.

Background technique

Today's various metal stamping products need to be installed with countersunk screws due to the structural and aesthetic requirements, so it is necessary to manufacture round or special-shaped salads on metal sheets with a small thickness of t0.8~t3.0 Shaped taper hole, its structure is shown in Figure 1, referred to as salad hole (taper hole).

There are generally two methods for making salad-shaped taper holes: drilling method and punching method.

As shown in Fig. 2, the drilling method includes two steps, the sheet metal material 1 is first drilled a drill hole a1 with a drill bit on a drill press, and then the salad hole a is countersunk in the drill hole a1 with a tapered drill bit. The surface roughness of the drilled salad holes a is relatively high, and the hole size accuracy is not high. For products with a large distance between the salad holes a, the position accuracy of each hole cannot be guaranteed, and the efficiency is extremely low, and this method cannot process special-shaped holes. .

As shown in Figure 3, the stamping method includes the following steps. First, a bottom hole a2 smaller than the drilled hole a1 in Figure 1 is pre-punched out on the metal sheet 1, and then a countersunk hole a3 is pressed out above the bottom hole a2. , and finally punch the salad through the hole a4, and a total of three processes are required to complete the salad hole a. The stamping method has the problem of high cost. In addition, because the three processes use different molds, the positioning accuracy of the product in different molds is not easy to maintain, and it is easy to cause punching deviation, especially in parts with large spacing between salad holes. This phenomenon occurs, and the reject rate is high.

In a word, the above-mentioned drilling method and stamping method for making salad holes all have the problems of low precision, low efficiency, and high production cost.

Utility model content

In order to overcome the problems of low precision, low efficiency and high production cost of the salad hole production method in the prior art, the utility model provides a stamping die.

A stamping die, comprising an upper mold frame, a lower mold frame and a leading pillar; the leading pillar is installed on the lower mold frame, the upper mold frame is provided with a leading hole, the leading hole is provided with a leading sleeve, The upper end of the main post is assembled into the main sleeve;

Wherein, it also includes a punch and a die insert; a die is fixed above the lower die frame, and a punch fixing plate and a stripping plate are sequentially fixed below the upper die frame;

The die insert is arranged on the die, and the die insert is provided with punching holes;

The punch includes a punch mounting part at the upper end, a punch body in the middle and a cylindrical punch at the lower end; the punch mounting part is installed on the punch fixing plate; the cylindrical punch is connected to the A transitional conical surface is formed between the punch bodies; the punch body passes through the stripper plate, and the cylindrical punch matches the punching hole on the die insert.

Preferably, the die is provided with a push plate cavity, and a push plate is installed in the push plate cavity; the die insert is installed on the push plate.

Preferably, a punch hole is provided on the punch fixing plate, and the punch installation part of the punch is inserted into the punch hole;

The side of the punch body is provided with a keyway; a fixed key is provided, the part of the fixed key is put into the keyway, and the fixed key is installed on the lower surface of the punch fixing plate through screws, and the punch is pressed on the The punch is fixed on the plate.

Preferably, an insert hole is formed on the push plate, and the die insert is installed in the insert hole;

The side of the insert hole is provided with a screw hole; the upper part of the die insert and the upper part of the screw hole are provided with a step part, and the steps of the two are combined to form a countersunk step hole;

A countersunk screw is provided, the screw part of which is installed in the screw hole, and the head of the countersunk screw is pressed in the countersunk step hole to fix the die insert on the push plate.

Preferably, inner guide posts are installed on the upper mold frame;

Both the stripper plate and the die are provided with inner guide holes, and inner guide sleeves are arranged in the inner guide holes; the lower ends of the inner guide posts are assembled into the inner guides in the stripper plate and the die. set.

Preferably, a blanking hole with a narrow top and a wide bottom is formed below the punching hole on the die insert.

Preferably, an upper limit block is fixed below the upper mold frame, a lower limit block is fixed above the lower mold frame, and the upper limit block and the lower limit block are oppositely arranged.

Preferably, the lower mold frame is provided with a first push hole, and a rectangular first spring, a first spacer and a first screw plug are installed in the first push hole from top to bottom, and the first push hole The upper end of a spring pushes against the lower surface of the push plate, and the first screw plug is screwed into the first push hole.

Preferably, the push plate is provided with a material ejection hole, the lower frame is provided with a second push hole, and the second push hole is provided with a second screw plug and a second pad from bottom to top. Block, the second spring and the ejector pin, the second screw plug is threadedly connected in the second ejector hole, and the upper part of the ejector pin passes through the second ejector hole;

A third push hole is provided on the upper mold frame, a limit hole is provided on the punch fixing plate; a screw hole is provided on the stripping plate;

The third push hole is provided with a third screw plug, a third spring and a stopper from top to bottom; the third screw plug is threaded in the third push hole, and the stopper The lower end of the lower end passes through the limiting hole and is pushed against the upper surface of the discharge plate;

A fourth screw is arranged in the screw hole on the stripping plate, and the fourth screw is threadedly connected with the limiting member.

The stamping die provided by the embodiment of the utility model combines the forming principles of forging and stamping, and can make salad holes on the metal sheet with one process, which overcomes the low precision and low efficiency of the drilling method, especially It is the limitation of not being able to process special-shaped holes, and the three processes of the stamping method are reduced to one process, which eliminates the influence of accuracy differences when multiple processes are repeatedly positioned, reduces the number of manpower, equipment and molds used, and improves efficiency. The crafting cost of salad holes has been reduced.

Description of drawings

Fig. 1 is a schematic diagram of a salad hole on a sheet metal;

Fig. 2 is a schematic diagram of salad holes made by drilling method in the prior art;

Fig. 3 is a schematic diagram of making salad holes by stamping method in the prior art;

Fig. 4 is a schematic sectional view of a stamping die in a specific embodiment of the present invention;

Fig. 5 is an enlarged schematic diagram of the assembly relationship between the punch and the die insert in the specific embodiment of the present invention;

Fig. 6 is an enlarged schematic view of the punch in the specific embodiment of the present invention;

Fig. 7 is an enlarged schematic diagram of a die insert in a specific embodiment of the present invention;

FIG. 8 is an enlarged schematic diagram of A in FIG. 5 .

Among them, 1. sheet metal; 2. first spring; 3. first pad; 4. first screw plug; 5. die insert; 6. countersunk screw; 7. second pad; 8. The second screw plug; 9, the second spring; 10, the ejector pin; 11, the push plate; 12, the first positioning pin; 13, the first screw; 14, the die; 15, the unloading plate; 16, the punch Fixed plate; 17, upper mold frame; 18, leading sleeve; 19, leading column; 20, second positioning pin; 21, second screw; 22, third screw plug; 23, third spring; 24, limit piece 25, the third screw; 26, the punch rod; 27, the fixed key; 28, the fourth screw; 29, the inner guide post; 30, the first inner guide sleeve; 31, the second inner guide sleeve; 32, the upper limit block ;33, the fifth screw; 34, the sixth screw; 35, the lower limit block; 36, the lower mold base; a, salad hole; a1, drilling; a2, bottom hole; a3, countersunk taper hole; a4, salad Through hole; 6a, countersunk step hole; 5a, blanking hole; 5b, punching hole; 5c, step part; 26a, punch installation part; 26b, punch body; 26c, punch; 26d, conical surface; 26e , keyway; 36a, blanking channel.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Example 1

As shown in Figure 4, this example discloses a kind of stamping mold, comprises upper formwork 17, lower formwork 36 and main column 19; A leading hole is provided on the top, and a leading sleeve 18 is arranged in the described leading hole, and the upper end of the leading pillar 19 is assembled into the leading bushing 18; like this, the upper mold frame 17 can be positioned on the leading pillar 19 with respect to the lower mold frame 36. Move up and down.

Wherein, in order to realize one-time stamping out of the salad hole on the sheet metal 1, it also includes a punch 26 and a die insert 5;

As shown in Figures 5 to 8, the installation relationship between the above-mentioned punch rod 26 and the die insert 5 is described as follows: the die 14 is fixed above the lower die frame 36, and the punches are sequentially fixed below the upper die frame 17. Rod fixing plate 16 and stripping plate 15; the die insert 5 is arranged on the die 14, and the die insert 5 is provided with a punching hole 5b;

The punch 26 includes a punch mounting part 26a at the upper end, a punch body 26b at the middle and a cylindrical punch 26c at the lower end; the punch mounting part 26a is mounted on the punch fixing plate 16; A transitional conical surface 26d is formed between the punch 26c and the punch body 26b; the punch body 26b passes through the stripper plate 15, and the cylindrical punch 26c and the die insert The punching hole 5b on 5 is suitable.

As a preferred embodiment, the die 14 is provided with a push plate cavity, and a push plate 11 is installed in the push plate cavity; the die insert 5 is installed on the push plate 11 .

When the stamping die is working, the punch 26c on the punch rod 26 will be punched into the punch hole 5b on the die insert 5, because a transitional conical surface 26d is formed between the punch 26c and the punch body 26b, Therefore, as long as the descending distance of the punching rod 26 is controlled during the descending operation of the punching rod 26, the salad hole with a tapered surface can be punched out on the metal material plate.

The die 14 and die insert 5 can be integrally formed, and the punch 26 and the punch fixing plate 16 can be integrally formed. However, the integral molding method is not conducive to the replacement of parts, and a split design is preferred.

The installation method of the punch rod 26 is not particularly limited, as long as it can reliably and firmly fix the punch rod 26 on the punch rod fixing plate 16 . For example, as a preferred embodiment, as shown in Figure 4, the punch fixing plate 16 is provided with a punch hole, and the punch mounting part 26a of the punch 26 is inserted into the punch hole; The side of the punch body 26b is provided with a keyway 26e; a fixed key 27 is provided, and part of the fixed key 27 is loaded into the keyway 26e, and the fixed key 27 is mounted on the lower surface of the punch fixing plate 16 by screws, The punch 26 is pressed against the punch fixing plate 16 . For the convenience of distinguishing it from the screws in the subsequent description, the screws here are called the fourth screws 28 . That is, the said fixing key 27 is mounted on the lower surface of the punch fixing plate 16 through the fourth screw 28 .

There is no particular limitation on the fixing method of the die insert 5 as long as it can be reliably fixed on the push plate 11 . For example, as a preferred embodiment, as shown in Figure 4, an insert hole (not marked in the figure) is formed on the push plate 11, and the die insert 5 is installed in the insert hole; The side of the insert hole is provided with a screw hole (not marked in the figure); the upper part of the die insert 5 and the upper part of the screw hole are provided with a step part 5c, and the step parts 5c of the two are combined to form a countersunk step hole 6a; a countersunk screw 6 is provided, the screw part of which is installed in the screw hole, and the head of the countersunk screw 6 (that is, the nut part) is pressed in the countersunk step hole 6a, and the concave The mold insert 5 is fixed on the push plate 11 .

Regarding the punch 26, it can use a softer and harder die material, while the die insert 5 uses a hard alloy material with a higher hardness. Because the price of cemented carbide is higher, the die insert 5 is made of Small inserts are inserted into the upper push plate 11 of the die 14, reducing the volume and cost; the die insert 5 with higher hardness is not easy to be damaged, and the structure of the punch 26 with relatively less hardness is designed as a quick-change structure. After the punch rod 26 is damaged, a new punch rod 26 can be replaced immediately.

For larger stamping dies, the positioning and guidance close to the main pillar 19 is not accurate enough. At this time, a secondary guide pillar with higher precision and more accurate positioning can be further used. As a preferred embodiment, as shown in Figure 4, an inner guide post 29 is installed on the upper mold frame 17; an inner guide hole is provided on the stripper plate 15 and the die 14, and in the inner guide hole Both are provided with inner guide sleeves; the lower ends of the inner guide pillars 29 are assembled into the inner guide sleeves in the stripper plate 15 and the die 14 . Wherein, the inner guide sleeve on the discharge plate 15 is called the first inner guide hole, and the inner guide sleeve in the first inner guide hole is called the first inner guide sleeve 30; the inner guide hole on the die 14 is called is the second inner guide hole, and the guide sleeve in the second inner guide hole is called the second inner guide sleeve 31 . The inner guide post 29 extends into the second inner guide sleeve 31 after passing through the first inner guide sleeve 30 .

As shown in FIG. 5 and FIG. 7 , a blanking hole 5 a with a narrow top and a wide bottom is formed below the punching hole 5 b on the die insert 5 . Simultaneously, as shown in Figure 4, below the blanking hole 5a, a blanking channel 36a is also correspondingly provided on the lower mold frame 36, and the blanking hole 5a can conveniently drop the waste blanking behind the salad hole of the punching place, And drop out from the blanking channel 36a on the lower formwork 36.

As shown in FIG. 4 , an upper limit block 32 is fixed below the upper frame 17 , a lower limit block 35 is fixed above the lower frame 36 , and the upper limit block 32 and the lower limit block 35 are arranged oppositely. Specifically, the upper limit block 32 is installed on the lower surface of the upper mold frame 17 through a fifth screw 33 . The above-mentioned lower limiting block 35 is installed on the upper surface of the upper mold frame 17 through a sixth screw 34 . The upper limit block 32 and the lower limit block 35 can limit the downward distance of the punch 26c, prevent damage to the stamped product, and also prevent damage to the stamping die.

Specifically, as shown in FIG. 4 , the lower mold frame 36 is provided with a first push hole (not marked in the figure), and a rectangular first spring 2 is installed in the first push hole from top to bottom. , the first spacer 3 and the first screw plug 4, the upper end of the first spring 2 bears against the lower surface of the push plate 11, and the first screw plug 4 is screwed into the pushing hole.

There is no particular limitation on the fixing method of the die 14 and the fixing method of the punch fixing plate 16 as long as they can be reliably and firmly fixedly connected. For example, as shown in Figure 4, the die 14 is fixed on the lower mold frame 36 by the first positioning pin 12 and the first screw 13; the punch fixing plate 16 is fixed by the second positioning pin 20 and the second Screws 21 are installed on the upper mold frame 17 .

Wherein, there is also a jacking part for stamping products and sheet metal 1, which can adopt various jacking parts known to those skilled in the art, such as, as shown in Figure 4, the push plate 11 is provided with a jacking hole (not marked in the figure), the lower mold frame 36 is provided with a second push hole (not marked in the figure), and the second push hole is provided with a second push hole from bottom to top. Two screw plugs 8, the second cushion block 7, the second spring 9 and the ejector pin 10, the second spring 9 is a round wire spring, and the second screw plug 8 is threadedly connected in the second pushing hole, The upper part of the ejector pin 10 passes through the second ejector hole. During work, its ejector pin 10 pushes the metal sheet 1 after stamping after passing through the ejector hole.

Simultaneously, a jacking device is also provided on the upper mold frame 17, specifically, a third pushing hole is provided on the upper mold frame 17, and a limit hole is provided on the punch fixing plate 16; There is a screw hole (not marked in the figure);

A third screw plug 22, a third spring 23 and a stopper 24 are arranged in the third push hole from top to bottom; the third spring 23 is a rectangular spring, and the third screw plug 22 is threadedly connected to the In the third pushing hole, the lower end of the limiting member 24 passes through the limiting hole and pushes against the upper surface of the discharge plate 15;

A third screw 25 is provided in the screw hole on the stripping plate 15 , and the third screw 25 is threadedly connected with the limiting member 24 .

The manufacturing process of the salad hole is as follows: after the stamping die is installed on the punching machine, the metal material plate 1 is placed on the die 14, as shown in the enlarged view in Figure 8, the upper die frame 17 descends, and the upper punch 26c of the punch rod 26 is driven first. Press into the metal material plate to punch out the small hole of the product, and continue downward until the upper limit block 32 contacts the lower limit block 35, and the conical surface 26d on the punch rod 26 presses out the salad hole required by the product (due to the conical surface 26d The punch 26c squeezes the metal sheet 1, so that the metal sheet 1 is slightly deformed in the space between the discharge plate 15 and the punch 26c, because it is not easy to see with the naked eye, so the appearance of the product will not be affected.) Then in Driven by the punch press, the upper mold frame 17 goes up, and the unloading plate 15 still presses the metal material plate, so that the metal material plate is disengaged from the upward punch 26c, and the upper mold frame 17 continues to move up to the top dead center of the punch press and stops , take out the stamped metal sheet from the mold, and complete one stamping stroke, that is, one or several or even dozens of salad holes on the product are completed. Adjusting the height of any one of the upper limit block 32 and the lower limit block 35 will also control the height of the product hole as shown in Figure 1, so as to control the size of the salad hole.

The stamping die provided in this example combines the forming principles of forging and stamping, and can make salad holes on the metal sheet 1 in one process, which not only overcomes the low precision and low efficiency of the drilling method, especially the inability to Due to the limitations of processing special-shaped holes, the three processes of the stamping method are reduced to one process, which eliminates the influence of accuracy differences during repeated positioning of multiple processes, reduces the number of manpower, equipment and molds used, improves efficiency, and greatly reduces The crafting cost of a salad hole.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (9)

1. A stamping die, comprising an upper mold frame, a lower mold frame and a leading pillar; the said leading pillar is installed on the said lower mold frame, the upper mold frame is provided with a leading hole, and said leading hole is provided with a leading hole sleeve, the upper end of the main post is assembled into the main sleeve; It is characterized in that it also includes a punch rod and a die insert; a die is fixed above the lower die frame, and a punch fixing plate and a stripping plate are sequentially fixed below the upper die frame; the die is passed through The first positioning pin and the first screw are fixed on the lower mold frame; the punch fixing plate is installed on the upper mold frame through the second positioning pin and the second screw; The die insert is arranged on the die, and the die insert is provided with punching holes; The punch includes a punch mounting part at the upper end, a punch body in the middle and a cylindrical punch at the lower end; the punch mounting part is installed on the punch fixing plate; the cylindrical punch is connected to the A transitional conical surface is formed between the punch bodies; the punch body passes through the stripper plate, and the cylindrical punch matches the punching hole on the die insert. 2. The stamping die according to claim 1, wherein the die is provided with a push plate cavity, and a push plate is installed in the push plate cavity; the die insert is installed in the push plate cavity. board. 3. The stamping die according to claim 2, wherein a punch hole is provided on the punch fixing plate, and the punch mounting part of the punch is inserted into the punch hole; The side of the punch body is provided with a keyway; a fixed key is provided, the part of the fixed key is put into the keyway, and the fixed key is installed on the lower surface of the punch fixing plate through screws, and the punch is pressed on the The punch is fixed on the plate. 4. The stamping die according to claim 2, wherein an insert hole is formed on the push plate, and the die insert is installed in the insert hole; The side of the insert hole is provided with a screw hole; the upper part of the die insert and the upper part of the screw hole are provided with a step part, and the steps of the two are combined to form a countersunk step hole; A countersunk screw is provided, the screw part of which is installed in the screw hole, and the head of the countersunk screw is pressed in the countersunk step hole to fix the die insert on the push plate. 5. The stamping die according to claim 3 or 4, wherein an inner guide column is installed on the upper die frame; Both the stripper plate and the die are provided with inner guide holes, and inner guide sleeves are arranged in the inner guide holes; the lower ends of the inner guide posts are assembled into the inner guides in the stripper plate and the die. set. 6. The stamping die according to claim 3 or 4, characterized in that a blanking hole with a narrow top and a wide bottom is formed below the punching hole on the die insert. 7. The stamping die according to claim 1, wherein an upper limit block is fixed below the upper die frame, a lower limit block is fixed above the lower die frame, and the upper limit block and the lower limit block Block relative settings. 8. The stamping die according to claim 3 or 4, wherein a first push hole is provided on the lower mold frame, and a rectangular first push hole is installed in the first push hole from top to bottom. A spring, a first spacer and a first screw plug, the upper end of the first spring bears against the lower surface of the push plate, and the first screw plug is screwed into the first push hole. 9. The stamping die according to claim 3 or 4, characterized in that, the push plate is provided with a material ejection hole, the lower die frame is provided with a second push hole, and the second push hole A second screw plug, a second spacer, a second spring and a jacking pin are provided from bottom to top, the second screw plug is threadedly connected in the second pushing hole, and the upper part of the jacking pin passing through the second ejector hole; A third push hole is provided on the upper mold frame, a limit hole is provided on the punch fixing plate; a screw hole is provided on the stripping plate; The third push hole is provided with a third screw plug, a third spring and a stopper from top to bottom; the third screw plug is threaded in the third push hole, and the stopper The lower end of the lower end passes through the limiting hole and is pushed against the upper surface of the discharge plate; A fourth screw is arranged in the screw hole on the stripping plate, and the fourth screw is threadedly connected with the limiting member.