CN202779465U - Composite mold for stretching, squeezing and trimming case - Google Patents

Abstract

The utility model relates to a compound mold for stretching, extruding and edge trimming of a shell, which is composed of an upper die set mechanism, an elastic edge pressing mechanism, an upper die set mechanism and a lower die set mechanism. The mold handle, upper mold base, discharge block and stretch extrusion die, the elastic blank holder mechanism includes blank holder ring, ejector rod, spring top plate, spring and adjustment plate, the spring transmits the elastic force to the machine through the spring top plate and ejector rod The blank holder, the lower die group mechanism is a door-shaped structure composed of the lower die base and the lower pad. Compared with the prior art, the utility model adopts a composite structure of stretching, extrusion and cutting, which is suitable for various occasions such as single punching and continuous punching. Stretching, extrusion, cutting and compounding in a pair of molds saves the process and saves the cost.

Description

Composite die for stretching, extrusion, trimming of shell

technical field

The utility model relates to a composite mold, in particular to a shell stretching extrusion edge trimming composite mold.

Background technique

For general cutting dies, the process scheme used is divided into three processes, namely: first blanking and stretching the part for the first time, and the height after the first stretching is about 27mm; then carry out the second stretching and third trimming to reach The product requires each size. After mold testing, the flange of the part was found to be unstable and wrinkled, and after the trimming process was completed, the mouth of the part was in the shape of a sharp edge. The above serious defects made the mold and product fail to pass the acceptance.

Utility model content

The purpose of this utility model is to provide a shell stretching, extrusion, edge trimming composite mold with good extrusion and cutting effect and high production efficiency in order to overcome the defects of the above-mentioned prior art.

The purpose of this utility model can be achieved through the following technical solutions:

A shell stretching extrusion edge trimming compound die, comprising:

Upper die set mechanism: including the die handle, upper die base, discharge block and stretch extrusion die set in sequence from top to bottom, the middle part of the die handle, upper die base and discharge block runs through the rod, and the The unloading block is set in the extrusion cutting through hole opened in the middle of the stretch extrusion die;

Elastic blank holder mechanism: including blank holder, push rod, spring top plate, spring and adjustment plate. connection, the spring clamp is set between the spring top plate and the adjustment plate, and the spring transmits the elastic force to the blank holder through the spring top plate and the ejector rod;

Lower die set mechanism: It is a door-shaped structure composed of lower die base and lower feet.

A stretching extrusion punch is arranged in the extrusion cutting through hole opened in the middle part of the stretching extrusion cutting die.

An extrusion cutting edge is provided on the stretch extrusion punch.

A gap of 0.05-0.07mm is set between the stretch extrusion punch and the stretch extrusion die.

A 50° chamfer is provided on the periphery where the lower side of the extrusion-cut through hole abuts against the blank holder ring.

The blank holder is a cylindrical blank holder, which plays the role of blank holder and positioning at the same time.

The blank holder is movably connected with the upper stretching extrusion die through the adjusting nut and the limit post, and the blank holder force can be adjusted by controlling the distance between the limit post and the blank holder, so that the blank holder force can Maintain balance while preventing the blank from being over-pressed.

The spring top plate, the spring and the adjustment plate are connected with the lower module mechanism through the double-ended screw rod. The double-ended screw rod runs through the spring top plate and the adjustment plate. The spring is sleeved on the outside of the double-ended screw rod. The lower mold base is connected, and the bottom is fixed on the adjustment plate by the adjustment nut.

Compared with the prior art, the utility model has the following advantages:

1. It adopts stretch-extrusion-cut composite structure, which is suitable for various occasions such as single punching and continuous punching.

2. The design and manufacture of the mold is simple and easy, and the effect of extrusion and cutting is good, which can greatly improve the production efficiency.

3. Stretching, extrusion, cutting and compounding in a pair of molds saves the process and saves the cost.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Figure 2 is a partial enlarged view of the stretch extrusion die.

In the figure, 1 is the beating rod, 2 is the mold handle, 3 is the upper die base, 4 is the drawing die, 5 is the unloading block, 6 is the drawing die, 7 is the adjusting nut, and 8 is the limiter. Position column, 9 are blank holders, 10 are ejector rods, 11 are lower mold bases, 12 are lower pads, 13 are spring top plates, 14 are springs, 15 are adjustment plates, 16 are double-ended screw rods, and 17 are adjustment nuts.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

A composite die for shell stretching, extrusion, and edge trimming, and its structure is shown in Figure 1. The die is composed of an upper die set mechanism, an elastic edge-holding mechanism and a lower die set mechanism. Among them, the upper die set mechanism includes die handle 2, upper die base 3, unloading block 5 and stretch extrusion die 4 arranged sequentially from top to bottom, die handle 2, upper die base 3 and the middle part of unloading block 5 Through the beating rod 1, the unloading block 5 is arranged in the extrusion cutting through hole provided in the middle part of the stretching extrusion cutting die 4. The elastic blank holder mechanism includes a blank holder 9, a push rod 10, a spring top plate 13, a spring 14 and an adjustment plate 15. It is connected with the spring top plate 13 below, and the spring 14 is sandwiched between the spring top plate 13 and the adjustment plate 15 , and the spring 14 transmits the elastic force to the blank holder 9 through the spring top plate 13 and the ejector rod 10 . The lower mold group mechanism is a door-shaped structure formed by the lower mold base 11 and the lower pad 12 .

A stretching extrusion punch 6 is provided in the extrusion cutting through hole provided in the middle part of the stretch extrusion die 4 , and an extrusion cutting edge is provided on the stretch extrusion punch 6 . A gap of 0.05-0.07 mm is provided between the stretch extrusion cutting punch 6 and the stretch extrusion die 4 . As shown in Figure 2, the local enlarged view of stretch extrusion die 4, the chamfer provided on the periphery of the lower side of the extrusion and cutting through hole abutting against the blank holder 9 is about 24° which is generally used in the prior art. It is improved to 50°, so that it can be used in conjunction with the spring with adjusted blank-holding force adopted by the utility model, which can well solve the problem that the existing processed parts have a sharp edge-like structure after the trimming process is completed. . The blank holder 9 used is a cylindrical blank holder, which can play the functions of blank holder and positioning at the same time. The blank holder 9 is movably connected with the upper stretch extrusion die 4 through the adjusting nut 7 and the limit post 8, and the blank holder force can be regulated by controlling the distance between the stop post 8 and the blank holder 9, which can Keep the blank holder force balanced while preventing the blank from being pressed too tightly.

The spring top plate 13, the spring 14 and the adjustment plate 15 are connected with the lower module mechanism through the double-ended screw rod 16, the double-ended screw rod 16 runs through the spring top plate 13 and the adjustment plate 15, the spring 14 is sleeved on the outside of the double-ended screw rod 16, and the double-ended screw rod The top of 16 is connected with lower mold base 11, and the bottom is fixed on the adjusting plate 15 through adjusting nut 14.

The utility model aims at the existing edge trimming problem. Through structural innovation, the second stretching of process 2 and the edge trimming of process 3 are done on a pair of compound stretching and extrusion edge trimming dies. The die first stretches and then squeezes. Pressing and trimming action; the working process of the mold is: when the mold is open, the elastic force of the spring 14 is transmitted through the spring top plate 13 and the ejector rod 10 to lift the blank holder 9. At this time, the semi-finished sleeve that has been stretched for the first time On the blank holder 9, when the slider of the punching machine goes down, the stretch extrusion die 4 and the blank holder 9 work together to press the product. The specific blank holder force can be controlled by the limit column 8 and the blank holder 9 to adjust the distance. As the slide block of the punching machine moves down gradually, the stretching extrusion die 4 and the stretching extrusion punch 6 work together to stretch the semi-finished product for the second time. When the stretching is completed, the stretching extrusion punch 6 The upper extrusion cutting edge starts to extrude and cut the product mouth with the stretching extrusion cutting die 4, and completes trimming. Parts and waste are pushed out from the stretch extrusion die 4 by the unloading block 5, and the workpiece and trimming material are separated thereupon.

When the stretching is completed and the edge trimming is about to be carried out, due to the joint action of the blank holder ring 9 and the stretching extrusion die 4, and due to the influence of the structure of the stretching extrusion die 4, the edge trimming after the first stretching The remaining material is stretched into a shape consistent with the shape of the stretching extrusion die opening. When the stretching extrusion die 4 moves down and contacts the billet mouth first, due to its own small gap, the stretching extrusion die When the cutting die 4 and the stretching extrusion punch 6 are squeezed, the real starting point of the squeeze is slightly below the design starting point of the stretching punch 6 and the stretching punch 4 (that is, by stretching and cutting). Die mouth direction), in other words, extrusion cutting begins to occur along the 50° slope of the blank, which can well solve the problem that the existing processed parts have a sharp edge-shaped structure after the edge trimming process is completed. .

Claims (8)

1. a housing stretches and pushes compound trimming die, it is characterized in that this composite die comprises:

Upper module mechanism: comprise die shank, upper bolster, the unloading block that sets gradually from top to bottom and stretch to squeeze and cut die, described die shank, upper bolster and unloading block middle part are run through and are played rod, and described unloading block is arranged on to stretch to squeeze cuts crowded the cutting in the through hole that the die middle part is offered;

Elastic blank holding mechanism: comprise blank holder, push rod, spring top board, spring and adjust plate, described blank holder supports and being located at the crowded below of cutting die that stretches, blank holder is connected with the spring top board of below through push rod, described spring clip is located at the spring top board and adjusts between the plate, and spring passes to blank holder by spring top board and push rod with elastic force;

Lower module mechanism: be the character“door” form structure that die shoe and bottom seat pad form.

2. a kind of housing according to claim 1 extruding compound trimming die that stretches is characterized in that, described stretching is squeezed cut that the die middle part offers crowded and cut that being provided with in the through hole stretches and squeeze and cut punch.

3. a kind of housing according to claim 2 stretches and pushes compound trimming die, it is characterized in that, described stretching is squeezed to cut to offer on the punch and squeezed the cutting blade mouth.

4. according to claim 2 or the 3 described a kind of housings extruding compound trimming dies that stretch, it is characterized in that described stretching is squeezed and cut punch and the crowded gap that is provided with 0.05-0.07mm between the die of cutting that stretches.

5. a kind of housing according to claim 1 extruding compound trimming die that stretches is characterized in that, described squeezing cut the downside of through hole and the periphery of blank holder butt is provided with 50 ° chamfering.

6. a kind of housing according to claim 1 stretches and pushes compound trimming die, it is characterized in that described blank holder is the tubular blank holder.

7. according to claim 1 or the 6 described a kind of housings extruding compound trimming dies that stretch, it is characterized in that described blank holder squeezes through the stretching on adjusting nut and limited post and top and cuts the die flexible connection.

8. a kind of housing according to claim 1 stretches and pushes compound trimming die, it is characterized in that, described spring top board, spring and adjust plate and be connected with lower module mechanism through double threaded screw, described double threaded screw runs through the spring top board and adjusts plate, spring housing is located at the outside of double threaded screw, the top of double threaded screw is connected with die shoe, and the bottom is fixed on through adjusting nut and adjusts on the plate.

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