CN210333971U - Upper die assembly with movable core rod - Google Patents

Abstract

The utility model discloses an upper die assembly of area activity plug, including plug, linear drive device and drift. The punch is internally provided with a through hole, the core rod passes through the punch and is exposed out of the through hole, and the linear driving device drives the core rod to move axially. The upper die assembly with the movable core rod can extend out of the relative position of the core rod guide workpiece before stamping, so that the stamping position is more accurate, and the stamping precision is improved. And the core rod is shortened when the workpiece is punched, and the core rod can be used as a part of a die for punch forming and can also be retracted into a punch, so that the processing of the punched workpiece is not influenced. After the punching is finished, the core rod can stretch out to jack the workpiece, the phenomenon that the workpiece is adhered to the upper die in the traditional upper die is avoided, the continuous machining of the punching machine can be effectively ensured, and the punching machine is compact in structure and high in economic applicability. This utility model is used for the machining field.

Description

Upper die assembly with movable core rod

Technical Field

The utility model relates to the field of machining, especially, relate to an upper die assembly of area activity plug.

Background

Stamping is a forming method in which a press and a die are used to apply external force to a plate, a strip, a pipe, a profile, etc. to cause plastic deformation or separation, thereby obtaining a workpiece of a desired shape and size. In the stamping process, the method has the advantages of high production efficiency, stable production quality, low energy consumption and the like, and is widely applied to the field of mechanical manufacturing. To general stamping, can be provided with the mould usually, can be divided into mould and lower mould on specifically, general lower mould is immovable, drives through the press and goes up the mould and move the punching press of accomplishing to the lower mould. However, the common upper die is simple in structure, and the stamping quality is poor due to the fact that workpieces are prone to dislocation. Meanwhile, the punched workpiece is easily adhered to the upper die, so that discontinuous processing is caused, and the production efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compact practical last mould subassembly of area activity plug.

The utility model adopts the technical proposal that: an upper die assembly with a movable core rod comprises the core rod, a linear driving device and a punch head, wherein a through hole is formed in the punch head, the core rod penetrates through the punch head and is exposed out of the through hole, and the linear driving device drives the core rod to move axially.

As an improvement of the scheme, the device also comprises a liftable bracket, and the core rod, the linear driving device and the punch are all arranged on the bracket.

As the improvement of the scheme, the core rod support device further comprises a first limiting assembly and a second limiting assembly, wherein the first limiting assembly is fixed on the core rod, the second limiting assembly is fixed on the support, and the second limiting assembly can abut against the first limiting assembly.

As an improvement of the scheme, the first limiting assembly comprises a first stop block and a second stop block which are sequentially located at different axial positions, the second limiting assembly is a baffle, and the first stop block and the second stop block are respectively located on two sides of the baffle.

As an improvement of the scheme, the support is provided with a guide block, the guide block is provided with a long hole for the core rod to pass through, and the punch is fixed at the tail end of the long hole.

As an improvement of the scheme, the tail end of the core rod is reduced to form a punching core section, and the part of the core rod, which penetrates through and is exposed out of the through hole, is the punching core section.

As an improvement of the scheme, the length of the exposed through hole of the punching core section is larger than the distance from the second stop block to the baffle.

As an improvement of the scheme, the section of the part, which is not reduced, of the core rod is larger than the through hole, the upper end of the punch is provided with a cavity communicated with the through hole, and the section of the cavity is consistent with that of the long hole.

As an improvement of the scheme, the linear driving device is a linear air cylinder.

As an improvement of the scheme, the punching device further comprises a sensor positioned on the lower side of the punch.

The utility model has the advantages that: this take last mould subassembly of activity plug, the plug passes the drift and stretches out, and utilize linear drive device to drive plug axial motion, can stretch out the relative position that the plug led positive work piece before the punching press, make its punching press position more accurate, improve punching press precision, and shorten the plug when the work piece punching press, the plug can regard as stamping forming's partial mould, also can retract in the drift, do not influence the processing of punching press work piece, the plug can stretch out the back at the punching press completion back and open the work piece, avoid traditional last mould to have the phenomenon of work piece adhesion mould easily, can effectively guarantee the continuity of punching machine processing, and its compact structure, economic suitability is strong.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

FIG. 1 is a schematic view of the assembly in partial cross-section;

fig. 2 is an enlarged view at a position a in fig. 1.

Detailed Description

Referring to fig. 1 and 2, the present invention relates to an upper mold assembly with a movable core rod, which comprises a core rod 1, a linear driving device 2 and a punch 41. The movable core rod-carrying upper die assembly is generally disposed in a stamping apparatus, and generally the entire movable core rod-carrying upper die assembly is moved in the stamping apparatus during the stamping process to effect the stamping. The punch 41 is generally harder and is the key component for current stamping. Typically, the end of the punch 41 is in direct contact with and interacts with the workpiece, and the punch 41 is dimensioned as desired. The punch 41 is provided with a through hole, the core rod 1 passes through the punch 41 and is exposed from the through hole, and the linear driving device 2 drives the core rod 1 to move axially. In general, the mandrel bar 1 may be used as a part of a forming die during the pressing process, or may be completely retracted into the punch 41 during the pressing process. The linear drive 2 is typically a linear cylinder or may be a combination of a rotary drive and a linear motion mechanism, such as a motor and screw arrangement. The punch 41 is generally directed downwardly and the linear drive 2 is located uppermost in the entire upper die assembly with the movable core rod. Preferably, a bracket is provided, and the bracket is generally a relatively thick and heavy block-shaped structure, so that the rigidity of the bracket is ensured to be not easy to deform. Usually, the linear driving device 2 and the punch 41 are fixedly arranged on a bracket, the core rod 1 is rotatably connected with the bracket, and the punching equipment drives the bracket to realize punching operation.

The mandrel positioning device further comprises a first limiting assembly and a second limiting assembly, wherein the first limiting assembly is fixed on the mandrel 1, the second limiting assembly is fixed on the bracket, and the second limiting assembly can abut against the first limiting assembly. Generally, the linear driving device 2 only performs a driving function, and has a limited limiting capacity for the mandrel bar 1. In the stamping process, a larger acting force is usually generated, and the relative position of the core rod 1 can be ensured through the first limiting assembly and the second limiting assembly, so that the core rod 1 cannot damage the linear driving device 2. Typically, the first and second stop assemblies are relatively rigid and interfere with each other as the mandrel 1 moves axially. Preferably, the first position-limiting component is a stopper, and the second position-limiting component is a baffle 31. Two stop blocks, namely a first stop block 11 and a second stop block 12, are arranged on the core rod 1, and the first stop block 11 and the second stop block 12 are positioned at different axial positions of the core rod 1. For the case where the punch 41 is downward and the core rod 1 is vertically downward, the first stopper 11 and the second stopper 12 are sequentially set from high to low. The distance between the first stopper 11 and the second stopper 12 is greater than the distance between the upper end surface and the lower end surface of the stopper 31, and is specifically set according to the required moving distance of the mandrel bar 1. The core rod 1 may pass through the baffle 31, or the baffle 31 may be disposed close enough to the core rod 1 that the stopper can abut. The stability of the core rod 1 can be further improved by providing a hole in the baffle plate 31, through which the core rod 1 passes through the baffle plate 31.

In a preferred embodiment, the holder is provided with a guide block 32, the guide block 32 is provided with a long hole through which the mandrel bar 1 is inserted, and the punch 41 is fixed to the end of the long hole. The guide block 32 can further ensure the straightness of the core rod 1, and avoid the damage of the bending of the core rod 1 during stamping. The core rod 1 is generally circular in cross-section and is sprayed with a lubricant on its sides.

In a preferred embodiment, the end of the mandrel 1 is reduced to form a press core segment 13, and the portion of the through hole through which the mandrel 1 passes and is exposed is the press core segment 13. In order to ensure the rigidity and straightness of the core rod 1, the cross-sectional dimension of the core rod 1 cannot be made excessively small in general. For stamping relatively small parts, the punch 41 is typically extended with the punch core segment 13. Preferably, the section of the non-reduced part of the core rod 1 is larger than the through hole, the upper end of the punch 41 is provided with a cavity 42 communicated with the through hole, and the section of the cavity 42 is consistent with the long hole. Thus, the mandrel 1 cannot extend out of the through hole except for the portion for punching the core segment 13, and the mandrel 1 can be further restrained by the through hole of the punch 41, thereby preventing the mandrel 1 from coming off.

In the present embodiment, the linear driving device 2 is a linear cylinder, and a slide of the linear cylinder is connected to the mandrel bar 1. The whole support is connected to the punching equipment through a guide rod 33, and the whole upper die assembly with the movable core rod is driven to realize punching operation through the movement of the guide rod 33. A sensor 34 may be provided on the underside of the punch 41, the sensor 34 typically being fixed in the punching device. The sensor 34 is used for sensing the time when the punch 41 is pressed down, the working state of the punching equipment can be distinguished, the sensor 34 can be connected into the control device to realize related control of punching, and the proper demoulding time can be calculated in a proper matching mode. Preferably, the length of the punching core section 13 exposed out of the through hole is greater than the distance from the second stop 12 to the baffle 31, so that the punching core section 13 can act on the workpiece. The part of the punching core section 13 extending out of the punch 41 is matched with the punch 41 to punch a workpiece with steps, the punching core section 13 can form a blind hole in the workpiece, and the lower end surface of the punch 41 can form the steps on the upper edge of the blind hole.

Firstly, a lower die is designed and installed according to needs, and the lower die is generally of a hole and groove structure. And installing an upper die assembly with a movable core rod in the stamping device and debugging. And placing the workpiece plate, wherein in the stamping process, the stamping core section 13 of the core rod 1 firstly props against the workpiece plate to stabilize the relative position of the workpiece plate. Next, the mandrel 1 is continuously retracted until the second stop 12 abuts the stop 31, and the relative position of the mandrel 1 is fixed. The punch core segment 13 is still partially exposed at this point of the punch 41 for producing blind holes in the workpiece plate. After punching, the guide rod 33 drives the whole upper die assembly with the movable core rod to lift up, and the air cylinder drives the core rod 1 to extend the punching core section 13 so as to push the workpiece adhered to the punch 41 open. The first stop 11 now bears against the stop 31, preventing the mandrel 1 from continuing to move downwards. And moving the workpiece plate material next time for stamping.

Of course, the design creation is not limited to the above embodiments, and the combination of different features of the above embodiments can also achieve good effects. Those skilled in the art can make equivalent changes or substitutions without departing from the spirit of the present invention, and such equivalent changes or substitutions are included in the scope defined by the claims of the present application.

Claims (10)

1. The utility model provides an upper die assembly of area activity plug which characterized in that: the punching device comprises a core rod (1), a linear driving device (2) and a punching head (41), wherein a through hole is formed in the punching head (41), the core rod (1) penetrates through the punching head (41) and is exposed out of the through hole, and the linear driving device (2) drives the core rod (1) to axially move.

2. The upper die assembly with a movable mandrel as claimed in claim 1, wherein: the core rod punching machine further comprises a liftable support, and the core rod (1), the linear driving device (2) and the punch (41) are all installed on the support.

3. The upper die assembly with a movable mandrel as claimed in claim 2, wherein: the core rod positioning device is characterized by further comprising a first limiting assembly and a second limiting assembly, wherein the first limiting assembly is fixed on the core rod (1), the second limiting assembly is fixed on the support, and the second limiting assembly can abut against the first limiting assembly.

4. The upper die assembly with a movable mandrel of claim 3, wherein: the first limiting assembly comprises a first stop block (11) and a second stop block (12) which are sequentially located at different axial positions, the second limiting assembly is a baffle plate (31), and the first stop block (11) and the second stop block (12) are respectively located on two sides of the baffle plate (31).

5. The upper die assembly with a movable mandrel of claim 4, wherein: the support is provided with a guide block (32), the guide block (32) is provided with a long hole for the core rod (1) to pass through, and the punch (41) is fixed at the tail end of the long hole.

6. The upper die assembly with a movable mandrel of claim 5, wherein: the tail end of the core rod (1) is reduced to form a punching core section (13), and the part, through which the core rod (1) passes and is exposed, of the core rod is the punching core section (13).

7. The upper die assembly with a movable mandrel of claim 6, wherein: the length of the punching core section (13) exposed out of the through hole is larger than the distance from the second stop block (12) to the baffle plate (31).

8. The upper die assembly with a movable mandrel of claim 7, wherein: the section of the non-reduced part of the core rod (1) is larger than the through hole, a cavity (42) communicated with the through hole is arranged at the upper end of the punch (41), and the section size of the cavity (42) is consistent with that of the long hole.

9. The upper die assembly with the movable mandrel as claimed in any one of claims 1 to 8, wherein: the linear driving device (2) is a linear cylinder.

10. The upper die assembly with a movable mandrel of claim 9, wherein: also includes a sensor (34) located on the underside of the ram (41).

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