The mold alignment unit is also referred to as the mating guide of the mold blade. In order to ensure the alignment of the upper mold and the lower mold and shorten the preparation time, according to the requirements of product precision and production quantity, the mold alignment unit mainly has the following five types:
Mold aligning unit

The mold alignment unit is also referred to as the mating guide of the mold blade. In order to ensure the alignment of the upper mold and the lower mold and shorten the preparation time, according to the requirements of product precision and production quantity, the mold alignment unit mainly has the following five types:

(1). Non-guide type: When the mold is installed on the press, the blade is directly engaged in the cooperation, and the guiding device is not used.

(2). External guiding type: This type of device is the most standard structure. The guiding device is installed on the upper mold base and the lower mold base. It does not pass through each template, and is generally called a mold base type.

(3). External guiding and internal guiding combined type (1): This type of device is the most commonly used structure for continuous molds, and an internal guiding device is installed between the punch fixing plate and the pressing plate. The punch and the master mold are combined with a fixed pin and an outer guiding device. Another function of the inner guiding device is to prevent the pressure plate from tilting and to protect the small punch.

(4). External guiding and internal guiding combined type (2): This device is a high-precision high-speed continuous mold structure, and the inner guiding device penetrates the punch fixing plate, the pressing plate and the mother mold fixing plate, etc. Wait. The inner guiding device itself also has the function of the mold blade to match and protect the small punch. The main function of the outer guiding device is to obtain a smoothing effect when the mold is disassembled and installed in the punching machine.

(5). Inner guiding type: This structure does not use the outer guiding device. The inner guiding device penetrates the punch fixing plate, the pressing plate and the female mold fixing plate, etc., and correctly maintains the positional relationship of each piece. Protect the punch.

2. Guide and guide unit

There are two types of guides and accessories for guides and guides: (A). External guide type (die base type or main guide), (B). Internal guide type (or auxiliary) lead). In addition to the requirements of precision molds, the use of external guides and internal guides is highly demanding.

(1). External guiding type: Generally used in molds that do not require high precision, most of them are sold in a unit with the mold base. The main function is that the mold parts are assembled when the mold is installed in the punching machine, and there is almost no stamping processing. The dynamic accuracy maintains the effect.

(2). Internal guide type: Due to the progress of the mold processing machine, it has recently become popular. The main function is to maintain the dynamic precision of the stamping process, in addition to the blade part when the mold is mounted on the punching machine.

(3). External guiding and internal guiding combined type: One pair of molds uses both external guiding and internal guiding devices.

3. Punch and master unit (circular)

(1). Punch unit: The circular punch unit should be matched with the pressure plate guide sleeve unit according to its shape (shoulder type and straight type), length, and convenience of maintenance.

(2). Master die unit: The circular master die unit is also called the master die bushing unit. The form is monolithic and split. According to the production quantity, service life and rationality of the product or chipping, the master die unit The combination series are: (A). Using the template to directly machine the shape of the master mold, (B). The escape portion with two oblique angles, (C). Whether to use the back plate, (D). Irregular master shape There must be a swing prevention design.

4. Press bolt and spring unit

(1). Pressure bolt unit: The types of pressure plate bolts are: (A). External screw type, (B). Sleeve type, (C). Internal screw type. In order to keep the pressure plate parallel to the specified position, the method of stopping the pressing bolt (shoulder contact part): (A). The die seat receiving surface, (B). The top surface of the punch fixing plate, (C). The top surface of the punch back.

(2). Pressing spring unit: movable pressing plate pressing spring unit can be roughly divided into: (A). Separate use type, (B). Combined with pressing bolts

When selecting a binder spring unit, it is best to consider the following points: (A). Ensure the free length of the spring and the necessary amount of compression (the spring with a large compression should be placed in the pocket of the binder). (B). Initial spring compression (pre-compression) or load adjustment is not necessary. (C). Consider the ease of assembly or maintenance of the mold.

5. Guide pin unit (positioning of the feed direction of the strip)

(1).. Guide pin unit: The main function of the guide pin is to obtain the correct feed pitch during continuous press processing. The guiding unit for the stamping die has two types: the indirect type (the guide pin is used alone) and the direct type (the guide pin is installed inside the punch).

(2). The guide pin is assembled in the same way as the punch punch (installed on the punch fixing plate). It is subject to the punch fixing plate by a spring.

(3). The guide pin is additionally installed in the form of a press plate. The rigidity of the press plate is required because the guide pin protrudes from the press plate to a certain extent and prevents the mold from rising. It is necessary to pay attention to the form of guidance.

(4). The guide pin unit has a direct type, which is installed in the punch, and is mainly used for the edge cutting (cutting processing) or the edge cutting processing of the extension project, and the position positioning system utilizes the hole and the extension of the product. the inside diameter of.

6. Guide unit

(1). Shape punching (cutting processing) or continuous press processing, in order to guide the width direction of the material to be processed and obtain the correct feed pitch, the guide unit is used.

(2). Guide device for the width direction of the strip, the guiding method is: (A). Fixed plate guide pin type, (B). Movable guide pin type, (C). Plate tunnel guide type ( Single board), (D). Plate guiding type (two pieces), (E). Uplift pin guiding type (movable, fixed and both).

(3). The starting and stopping guiding device has the following forms: (1), slider type, (2), movable pin type, etc., and the main function is to position the material at the initial starting position of the mold.

(4). Feed stop device can correctly determine the feed pitch, mainly used for manual feeding, in the form of: (A) fixed stop pin, (B). movable stop pin, (C ). Side cut stop mode, (D). Hook stop mechanism, (E). Automatic stop mechanism.

(5). Side push type guide mechanism, the material is pressed to one side during the stamping process, which can prevent the snake phenomenon caused by the difference between the width of the strip and the width of the guide member.

(6). The position guiding mechanism of the blank material is in the form of: (A) fixed pin type (using the shape of the blank), (B) fixed pin type (using the hole of the blank), (C). Guide plate (for large parts), (D). Guide plate (integral shape), (E). Guide plate (divided shape).

7. Lifting and ejector unit

(1). Elevation pin unit: Its main function is to raise the material to the master mold during continuous stamping processing (the position height is called the feeding height, and achieve the purpose of smooth feeding, the form is: (A). Pin type (round, pure for lifting), is the most common sock pin unit. (B). Lift pin type (round, with guide pin hole), lift pin with guide pin The hole can prevent the material from withstanding the deformation of the guide pin and make the guide pin work. (C). The material and the guide pin type, as well as the guide function, the guide material of the continuous mold is most commonly used. Type (D). Lifting pin type (square) Air blow hole if required. (E). Add material and guide pin type (square).

(2). Top material unit: During the automatic stamping process, it is necessary to prevent the punching products or swarf from jumping on the surface of the master mold to avoid mold damage and poor stamping parts.

(3). Ejection unit: The main function of the ejection unit is to eject the product or waste from the mother mold during each press processing. The installation unit of the ejector unit is all two: (A). The reverse configuration mold is set in the upper mold part, (B). The configurable mold fashion is set in the lower mold part.

8. Fixed pin unit

The shape and size of the fixing pin unit are designed according to the standard specifications. The precautions for use are as follows: (A). The fixing pin hole should be a through hole. If it is not possible, consider the design method that is easy to use the screw. (B). The length of the fixing pin is moderately optimal and cannot be greater than the necessary length. (C). The fixed pin hole should have the necessary escape section. (D). When placed in the upper mold part, the mechanism to prevent falling should be designed to prevent it from falling. (E). When one of the press-fits is fitted with one of the sliding fits, the fixed pin hole on the sliding side is slightly larger than the fixed pin. (F). The number of fixed pins is based on two principles, and try to choose the same size.

9. Pressure plate unit

A particularly important point of the pressure plate unit is that the pressing surface and the female mold surface have the correct parallelism and the buffer pressure requirement balance.

10. Error detection unit

When the continuous die press processing is performed, the mold must design a fault detection unit to detect whether the change in the feed pitch exceeds the reference and stop the operation of the punch. The error detection unit is installed inside the mold, and the following two installation forms are adopted according to the detection method: (A). The upper mold is provided with a form of a detection pin, and when it is deviated from the material hole, the material is processed. Checked by contact. (B). The form of the checkout pin is installed in the lower mold, and one of the strips is in contact with the checkout pin to be detected.

Recently, the detection method using the contact method will be changed, and the case of using the proximity switch has an increasing trend.

The detection pin installed in the upper mold is a standard detecting device. Since it is detected near the bottom dead center, there is a time variation from the start of detection to the stop of the punching machine, and it is difficult to completely achieve the error prevention effect. The detection device installed in the lower mold is directly detected after the material feeding operation is completed, and this method has been paid attention to.

11. Waste cutting unit

During continuous press processing, the strips (waste) will be successively left in the mold. There are two ways to deal with them: (A). Reeling with a reel, (B). Refining it with a mold cutting device. There are two ways of the latter: (A). Using a special waste cutting machine (installed outside the press machine), (B). A cutting unit installed in the final project of the continuous mold.

12. Height stop block unit

The main function of the height stop block unit is to correctly determine the position of the dead point below the upper mold. The form is as follows: (A). The method of frequent contact during stamping, (B). Contact during assembly, press processing The way you don't touch. Further, in order to prevent contact between the upper mold and the lower mold during conveyance and storage of the mold, it is preferable to insert a spacer between the upper mold and the lower mold. When the accuracy requirement is not necessary, the standard of use can be screw-adjusted.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

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