CN209697938U - A kind of thermal upsetting die and its lower mold assemblies - Google Patents

Abstract

The utility model relates to a hot upsetting die and its lower die assembly. The hot upsetting die includes an upper die assembly and a lower die assembly arranged from top to bottom. The inserted rod mold also includes a mold base for the rod mold to be embedded in. The mold base is provided with a pressing plate for pressing the rod mold into the mold base. The rod mold includes a The top rod mold of molding cavity, and the bottom rod mold that is used to be stacked on the bottom of the top rod mold to improve the overall height of the rod mold, the height of the bottom rod mold is lower than the depth of the accommodation cavity for the rod mold to embed on the mold base. The die holder is positioned radially to the top bar die. When it is necessary to process long bolts or screws, place the bottom bar mold in layers on the bottom end of the top bar mold to increase the height of the bar mold. When it is necessary to process short bolts or screws, only place the top bar mold in the mold base. The height of the top bar mold is The height of the rod mold is high, and the hot heading mold has good versatility.

Description

A kind of hot heading mold and its lower mold assembly

technical field

The utility model relates to a hot heading die and a lower die assembly thereof.

Background technique

Due to the relatively small market demand for super-long bolts or screws, the existing processing methods for super-long bolts or screws are often mainly turning. However, turning processing has disadvantages such as low product processing efficiency, low raw material utilization rate, and product grain flow line damage, while hot heading processing has great advantages in saving raw materials and improving processing efficiency. Therefore, it is necessary to improve the hot heading die of conventional length bolts or screws to meet the hot heading processing of super long bolts or screws.

The hot heading die in the prior art comprises the upper mold assembly corresponding to the punch of the punch press and the lower mold assembly corresponding to the base of the punch press, as shown in Figure 1, the lower mold assembly includes a base 4, a mold base 5 , pressing plate 2 and rod mold 3, mold base 5 and base 4 encircle an accommodation chamber, and rod mold 3 is embedded in the accommodation chamber, and there is a rod mold cavity 9 for rod material loading in the rod mold 3. During use, bar material is packed in the bar mold cavity 9, and base 4 is connected with mold base 5 by screw 1, and pressing plate 2 is also connected with mold base 5 by screw 1 and rod mold 3 is compressed in mold base 5. The bottom of the rod mold 3 is provided with an annular spacer 8, and the inner hole of the annular spacer 8 is provided with an adjusting gasket 6 and a positioning pin 7 for supporting the rod material. The height of the rod mold cavity 9 is L1. By adjusting the adjusting gasket 6 The number or replace the positioning pin 7 to adjust the depth of the positioning pin extending into the rod cavity 9, the height of the rod cavity 9 can be adjusted to L1 within a small range, but for bolts or screws with large length differences, it is necessary to configure more A special mold with different rod cavity heights, and the versatility of hot heading molds is poor.

Utility model content

The purpose of this utility model is to provide a hot upsetting die to solve the problem of poor versatility caused by the need to configure different types of hot upsetting dies when producing bolts or screws with large length differences. ; The purpose of this utility model is to provide a solution to the above problems of the lower die assembly of the hot heading die.

The hot upsetting mold of the utility model adopts the following technical scheme:

The hot heading die includes an upper mold assembly and a lower mold assembly arranged from top to bottom, and the lower mold assembly includes a rod mold for the rod material to be loaded into during use, and also includes a mold base for the rod mold to embed, and the mold The seat is provided with a pressing plate for pressing the rod mold in the mold seat, and the rod mold includes a top rod mold with a molding cavity corresponding to the head of the bolt or screw to be formed, and a rod mold for stacking on the top rod mold. The bottom of the bottom rod mold to improve the overall height of the rod mold, the height of the bottom rod mold is lower than the depth of the cavity for the rod mold to be embedded on the mold base so that the mold base carries out radial positioning to the top rod mold.

The beneficial effects of the utility model are: when long bolts or screws need to be processed, the bottom rod mold is stacked at the bottom of the top rod mold to increase the height of the rod mold, and at the same time, the top rod mold and the bottom rod mold are radially Positioning, the pressing plate presses the rod mold in the mold base to ensure the coaxiality and relative position of the top rod mold and the bottom rod mold, so as to ensure the processing accuracy of long bolts or screws. At this time, the hot heading mold is used for long bolts or screws. Hot heading processing, in addition, by adjusting the number of bottom rod dies or replacing bottom rod dies of different heights, the height of the rod dies can be adjusted in a large range, so that the hot heading dies can process long bolts or screws of various lengths; When short bolts or screws need to be processed, only the top rod mold is placed in the mold base, and the height of the top rod mold is the height of the rod mold. At this time, the hot heading mold is used for hot heading processing of short bolts or screws, and the hot heading mold has good versatility.

In order to save the processing cost of the bottom rod mold and facilitate the design and processing of the bottom rod mold, the bottom rod mold described in this scheme is made of a whole rod module made of the same material, and the rod module is equipped with The matching rod material is perforated. Since the bottom rod mold only serves to straighten the rod material and does not need to have sufficient hardness, it can be made of the same material with relatively low hardness, which not only facilitates the processing of the bottom rod mold, but also saves costs .

In order to better fix the bar mold, the mold base in this solution includes a base mold base connected to the base of the lower mold assembly, and an additional mold base stacked on top of the base mold base.

In order to facilitate the fixing of the base mold base and the additional mold base, bolt holes are provided on the pressing plate and the additional mold base in this solution, and they are jointly fixed on the base mold base by screws passing through the bolt holes.

In order to better ensure the positioning accuracy of the bar mold, the top end surface of the base mold base in this solution is higher than the top end surface of the bottom bar mold.

The lower mold assembly of the utility model adopts the following technical scheme:

The lower mold assembly includes a rod mold for rod material to be loaded into when in use, and a mold base for the rod mold to be embedded in. The mold base is provided with a pressing plate for pressing the rod mold in the mold base, and the rod mold includes The top bar mold of the molding cavity corresponding to the head of the bolt or screw to be formed, and the bottom bar mold for stacking on the bottom of the top bar mold to increase the overall height of the bar mold, the height of the bottom bar mold is lower than that of the mold The depth of the accommodating cavity on the base for the rod mold to be embedded enables the mold base to radially position the top rod mold.

The beneficial effects of the utility model are: when long bolts or screws need to be processed, the bottom rod mold is stacked at the bottom of the top rod mold to increase the height of the rod mold, and at the same time, the top rod mold and the bottom rod mold are radially Positioning, the pressing plate presses the rod mold in the mold base to ensure the coaxiality and relative position of the top rod mold and the bottom rod mold, so as to ensure the processing accuracy of long bolts or screws. At this time, the hot heading mold is used for long bolts or screws. Hot heading processing, in addition, by adjusting the number of bottom rod dies or replacing bottom rod dies of different heights, the height of the rod dies can be adjusted in a large range, so that the hot heading dies can process long bolts or screws of various lengths; When short bolts or screws need to be processed, only the top rod mold is placed in the mold base, and the height of the top rod mold is the height of the rod mold. At this time, the hot heading mold is used for hot heading processing of short bolts or screws, and the hot heading mold has good versatility.

In order to save the processing cost of the bottom rod mold and facilitate the design and processing of the bottom rod mold, the bottom rod mold described in this scheme is made of a whole rod module made of the same material, and the rod module is equipped with The matching rod material is perforated. Since the bottom rod mold only serves to straighten the rod material and does not need to have sufficient hardness, it can be made of the same material with relatively low hardness, which not only facilitates the processing of the bottom rod mold, but also saves costs .

In order to better fix the bar mold, the mold base in this solution includes a base mold base connected to the base of the lower mold assembly, and an additional mold base stacked on top of the base mold base.

In order to facilitate the fixing of the base mold base and the additional mold base, bolt holes are provided on the pressing plate and the additional mold base in this solution, and they are jointly fixed on the base mold base by screws passing through the bolt holes.

In order to better ensure the positioning accuracy of the bar mold, the top end surface of the base mold base in this solution is higher than the top end surface of the bottom bar mold.

Description of drawings

Fig. 1 is the structural representation of the lower mold assembly of hot heading die in the prior art;

Fig. 2 is the first kind of use state diagram of the specific embodiment of the lower mold assembly of the present utility model;

Fig. 3 is a diagram of the second use state of the specific embodiment of the lower mold assembly of the present invention.

In the figure: 1-screw; 2-press plate; 3-rod die; 4-base; 5-die seat; 6-adjusting gasket; 7-locating pin; Base; 11-press plate; 12-basic mold base; 13-additional mold base; 14-top rod mold; 15-bottom rod mold; 16-adjusting gasket; 17-location pin; 18-rod cavity; A screw; 20-the second screw; 21-annular support pad.

Detailed ways

Embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

The specific embodiment of the lower mold assembly of the present utility model, as shown in Figure 2, the lower mold assembly includes a base 10, a mold base fixedly connected with the base 10, a rod mold for rod material loading, and a rod mold for pressing the rod Press plate 11 tight in the mold base. Specifically, the mold base is provided with a cavity for inserting the rod mold, and the rod mold is embedded in the cavity of the mold base; the rod mold includes a top rod mold 14 with a molding cavity corresponding to the head of the bolt or screw to be formed. , and the bottom rod mold 15 with a rod material perforation inside. The bottom rod mold 15 in the present embodiment is made of the integral rod module that is made of same material, is provided with the rod material perforation that adapts to rod material on the rod module, the molding cavity of top rod mold 14 and bottom rod mold The bar material perforation of 15 is the constituent part of bar mold cavity 18. When in use, the bottom rod mold 15 is stacked on the bottom of the top rod mold 14, thereby increasing the height of the rod mold, so that the height L2 of the rod mold cavity 18 composed of the bottom rod mold 15 and the top rod mold 14 can meet the requirements of hot heading processing long bolts or screw needs. It should be noted that, in order to ensure the radial positioning of the mold holder to the top rod mold 14, the height of the bottom rod mold 15 should be lower than the depth of the cavity on the mold holder for the rod mold to be embedded.

In order to better fix the bar mold, the mold base in this embodiment includes a base mold base 12 connected to the base 10, and also includes an additional mold base 13 stacked on the top of the base mold base 12. The additional mold base 13 in this embodiment The mold base 13 consists of an annular block. The pressure plate 11 and the additional mold base 13 are provided with bolt perforations, and the basic mold base 12 is provided with threaded holes corresponding to the bolt perforations. The threaded holes here are blind holes, and the pressure plate 11, the additional mold base 13 and the basic mold base 12 pass through The second screw 20 passing through the hole of the bolt is fixed on the basic mold base 12 ; the base 10 and the basic mold base 12 are fixedly connected by the first screw 19 . In this embodiment, the length of the first screw 19 is shorter than the length of the second screw 20, so as to save material cost as much as possible while ensuring reliable connection. In addition, in the present embodiment, the top end surface of the base mold base 12 is set higher than the top end surface of the bottom rod mold 15, and the bottom rod mold 15 and the top rod mold 14 can be radially positioned through the base mold base 12 at the same time to ensure the stability of the rod mold. Positioning accuracy, so as to ensure the processing quality of bolts or screws.

The lower mold assembly in this embodiment also includes an annular support pad 21 arranged at the bottom of the rod mold, and a plurality of adjusting gaskets 16 are arranged in the inner hole of the annular supporting pad 21. The positioning pin 17, during use, the positioning pin 17 stretches into the rod mold cavity 18 of the rod mold to support the rod material.

When it is necessary to process long bolts or screws, place the bottom rod die 15 at the bottom of the top rod die 14 to increase the height of the rod die. Press the rod mold tightly in the mold base to ensure the coaxiality and relative position of the top rod mold 14 and the bottom rod mold 15, thereby ensuring the processing accuracy of the long bolts or screws. At this time, the height of the rod mold of the hot heading die is L2. For hot heading processing of long bolts or screws, as shown in Figure 2; when short bolts or screws need to be processed, only the top rod mold 14 can be placed in the mold base, and the height of the top rod mold 14 is the height of the rod mold. The top rod die 14 in the embodiment is a rod die used for processing short bolts or screws in the prior art. At this time, the height of the rod die of the hot upsetting die is L1, which is used for hot upsetting of short bolts or screws, as shown in Figure 3 shown. Therefore, the hot heading die of the utility model can be used for processing bolts or bolts of different lengths, and has better versatility.

It should be noted that, by adjusting the number of bottom rod dies 15 or replacing bottom rod dies 15 of different heights, the height of the rod dies can also be adjusted in a large range, so that the hot heading die can process long bolts or screws of various lengths; By adjusting the number of adjusting gaskets 16, or replacing the positioning pin 17 so that the depth of the positioning pin 17 extending into the rod cavity 18 is different, it is also possible to adjust the height of the rod cavity 18 of the rod die in a small range, so that the hot heading mold Has better versatility.

The specific working process of the hot upsetting die of the utility model: the lower die assembly is fixed on the punching machine, and the upper die assembly has a cylindrical punch; since the hot upsetting die is often used for the processing of short bolts or screws, the hot upsetting die is normally The bottom should be in the state of processing commonly used short bolts or screws, that is, the state shown in Figure 3. Specifically, the base mold base 12 and the base 10 are fixedly connected by the first screw 19, and then the number of the adjusting washers 16 is adjusted according to the length of the bolt or the screw, and then the pressing plate 11 is pressed on the top rod mold 14 and passed through the second screw. 20. The pressing plate 11 is fixedly connected with the basic mold base 12 to complete the assembly of the hot upsetting die. At this time, the height of the rod mold of the hot upsetting die is L1, which is a hot upsetting die in the prior art. It opens and closes under action to complete the hot heading process of short bolts or screws.

When it is necessary to process long bolts or screws, on the basis of the above-mentioned hot heading mold for processing short bolts or screws, remove the second screw 20 and the pressing plate 11 of the lower die assembly, take out the top rod die 14, and then place the 12, add an additional mold base 13, and finally put the bottom rod mold 15 and the top rod mold 14 in the additional mold base 13 and the base mold base 12 successively, cover the pressing plate 11, and use the second screw 20 to carry out the pressing plate 11, additional The mold base 13 is connected to the basic mold base 12. The height of the bar mold is increased from the original L1 to L2. The hot heading mold is refitted, as shown in Figure 2, and then the punching machine is started to complete the hot heading process of the long bolts or screws.

Compared with the prior art, the hot upsetting die of the utility model can not only be used for the hot upsetting of short bolts or screws, but also be used for the hot upsetting of super long bolts or screws, that is, the rod length can be realized from L1 to L2 At the same time, by adjusting the number of spacers 16 or replacing the positioning pin 17, the depth of the positioning pin 17 extending into the rod cavity 18 is different, and the length of the rod can also be realized near L1 or L2. The hot upsetting process of the product, the versatility of the hot upsetting mold is good; in addition, the hot upsetting mold of the utility model only needs to add an additional mold base 13 and a bottom rod mold 15 on the basis of the existing hot upsetting mold, and the design and processing of the mold convenient.

There is only one bottom rod die 15 in this embodiment, and in other embodiments, more than two bottom rod dies can be stacked according to needs, so as to adjust the height L2 of the rod die, so that the hot heading die can be used for processing various length of long bolts or screws.

The bottom rod mold 15 in this embodiment is made of a whole piece of rod module made of the same material, and the rod module is provided with a rod material perforation adapted to the rod material; in other embodiments, the bottom rod mold 15 can be made of Two or more materials are processed and formed. For example, the top rod mold can be used to process the bottom rod mold, that is, the inside of the bottom rod mold is made of a material with increased hardness, and the outer periphery is made of a material with a lower hardness.

The mold base in the present embodiment comprises the base mold base 12 and the additional mold base 13 that is arranged on the top of the base mold base 12; mold and the top bar mold for positioning; in other embodiments, the additional mold base can also be stacked and set more than two according to the needs, for example, according to the height of the bar mold, a corresponding number of additional mold bases can be selected, so that the additional mold base and the base mold The depth of the accommodation cavity surrounded by the seat is adapted to the height of the bar mold.

The pressing plate 11 and the additional mold base 13 in this embodiment are provided with bolt perforations and are jointly fixed on the basic mold base 12 by passing through the second screw 20 of the bolt perforation; in other embodiments, the additional mold base and the basic mold base It can be fixed by one of the screws, and the additional mold base and the pressure plate are fixed by another screw, and the two screws are arranged in a staggered circumferential direction. At this time, the upper end of the bolt piercing hole set on the additional mold base is a countersunk hole; in other embodiments, The additional mold base can be set at the bottom of the basic mold base. At this time, the base mold base and the pressure plate are connected by the first short screw, and the additional mold base is fixed on the foundation by the second longer screw passing through the base and the additional mold base. on the mold base.

The top end face of the base mold base 12 in the present embodiment is set higher than the top end face of the bottom bar mold 15; The mold bases jointly carry out radial positioning of the bottom rod mold and the top rod mold; the top end surface of the bottom rod mold can also be equal to the top end surface of the base mold base, and at this time rely on the base mold base and the additional mold base to jointly position the bottom rod mold and the top rod mold. Die for radial positioning.

The lower mold assembly in the present embodiment also includes annular support pad 21, adjusting gasket 16 and positioning pin 17; in other embodiments, only any one of adjusting gasket or positioning pin can be set to adjust the height A small range of adjustment is carried out; the annular support pad, the adjusting gasket and the positioning pin may not be provided.

A specific embodiment of the hot upsetting mold of the present invention, the hot upsetting mold includes an upper mold assembly and a lower mold assembly arranged from top to bottom, the specific implementation of the lower mold assembly in this embodiment and the above-mentioned lower mold assembly The structure of the lower mold assembly described in the example is the same, and will not be repeated.

Claims (10)

1. a kind of thermal upsetting die, including the upper die component and lower mold assemblies being arranged from top to bottom, the lower mold assemblies are included in and make The bar mould that used time is packed into for bar material, further includes the die holder for the insertion of bar mould, and die holder is equipped with for bar mould to be pressed in die holder Pressing plate, characterized in that the bar mould includes the top with forming cavity corresponding with the head of bolt to be formed or screw Bar mould, and for being stacked the bottom bar mould for improving the whole height of bar mould in the bottom of top bar mould, bottom bar mould Height lower than the depth on die holder for the accommodating chamber of bar mould insertion so that die holder carries out radial positioning to top bar mould.

2. thermal upsetting die according to claim 1, characterized in that the bottom bar mould is whole made of same material Block bar module is made, and bar module is equipped with the bar material perforation being adapted to bar material.

3. thermal upsetting die according to claim 1 or 2, characterized in that the die holder includes connecting with the pedestal of lower mold assemblies The basic die holder connect further includes additional die holder of the arranged stacked at the top of basic die holder.

4. thermal upsetting die according to claim 3, characterized in that the pressing plate and additional die holder are equipped with bolt penetration hole simultaneously Screw by passing through bolt penetration hole is fixed on jointly on basic die holder.

5. thermal upsetting die according to claim 3, characterized in that the top end surface of the basis die holder is higher than bottom bar mould Top end surface.

6. lower mold assemblies further include the die holder for the insertion of bar mould including the bar mould being packed into when in use for bar material, die holder is equipped with Pressing plate for being pressed on bar mould in die holder, characterized in that the bar mould includes with the head with bolt to be formed or screw The top bar mould of the corresponding forming cavity in portion, and for being stacked in the bottom of top bar mould to improve the whole high of bar mould The bottom bar mould of degree, the height of bottom bar mould is lower than the depth of the accommodating chamber on die holder for the insertion of bar mould so that die holder is to top bar Mould carries out radial positioning.

7. lower mold assemblies according to claim 6, characterized in that the bottom bar mould is whole made of same material Block bar module is made, and bar module is equipped with the bar material perforation being adapted to bar material.

8. lower mold assemblies according to claim 6 or 7, characterized in that the die holder includes connecting with the pedestal of lower mold assemblies The basic die holder connect further includes additional die holder of the arranged stacked at the top of basic die holder.

9. lower mold assemblies according to claim 8, characterized in that the pressing plate and additional die holder are equipped with bolt penetration hole simultaneously Screw by passing through bolt penetration hole is fixed on jointly on basic die holder.

10. lower mold assemblies according to claim 8, characterized in that the top end surface of the basis die holder is higher than bottom bar The top end surface of mould.