CN220942842U - Stamping die structure for thread forming - Google Patents

Abstract

The utility model discloses a stamping die structure for thread forming, which comprises an upper die holder, an upper fixing plate, a stop plate, a stripper plate, a lower die plate and a lower die holder which are sequentially arranged from top to bottom, wherein an upper die core is arranged below the stop plate, one side of the upper die core is inserted with a dovetail sliding block, a lower base plate is arranged above the lower die holder and is arranged in the lower die plate, a lower die core matched with the upper die core is fixed on the lower base plate, a slot matched with the dovetail sliding block is arranged on the lower die core, a plurality of thread forming inserts are arranged on the lower base plate in a sliding manner, a plurality of upper die driving blocks matched with the thread forming inserts are arranged on the upper fixing plate, threads on the upper die core and the lower die core are of half-thread structures, and full-thread structures of the heads and the tails of the threads are arranged on the dovetail sliding block. The beneficial effects of the utility model are as follows: the screw thread extrusion forming of the cylindrical product formed by stretching is realized, the product after the screw thread processing is conveniently taken out, and the screw thread is prevented from being blocked on the screw thread core and being difficult to take out.

Description

Stamping die structure for thread forming

Technical Field

The utility model relates to the technical field of stamping dies, in particular to a stamping die structure for thread forming.

Background

Stamping die refers to a special technological equipment for processing materials (metal or nonmetal) into parts (or semi-finished products) in cold stamping processing, and is called a cold stamping die (commonly called a cold stamping die). Stamping is a press working method in which a material is subjected to separation or plastic deformation at room temperature by applying pressure to the material using a die mounted on a press machine, thereby obtaining a desired part. For products with thread forming processing in the stamping forming process, the thread forming processing cannot be finished through a stamping die, and the formed threads can clamp the thread forming core, so that the products cannot be removed. Therefore, for the above-mentioned products requiring thread processing, processing is often carried out by the expansion joint forming method. The common expansion joint forming method includes forming by using expansion with heat and contraction with cold and hydraulic extrusion forming, however, the thread processing is performed by adopting an expansion joint forming device, so that the expansion joint forming device is not only needed to be added, but also the operation procedures are numerous, and the processing efficiency of the product is low.

Disclosure of utility model

The present utility model is directed to a press die structure for forming threads, which solves the problems set forth in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a stamping die structure for thread forming, includes from the top down in proper order the upper die base, goes up fixed plate, backstop board, take off flitch, lower bolster and die holder, the below of backstop board is equipped with the mold core, go up one side of mold core and insert and establish the forked tail slider, the top of die holder is equipped with the lower bolster, the lower bolster is installed in the lower bolster, be fixed with the lower mold core with last mold core matched with on the lower bolster, be equipped with the slot of cooperation forked tail slider on the lower mold core, be equipped with a plurality of screw thread shaping inserts that slide set up on the lower bolster, a plurality of screw thread shaping inserts are along the week side setting of lower mold core, install a plurality of last mould driving blocks that cooperate the screw thread shaping inserts on the fixed plate, all be equipped with the inclined plane of mutually supporting on screw thread shaping inserts and the last mould driving block, the screw thread on last mold core and the lower mold core is half-thread structure, be equipped with the full thread structure of screw thread head and afterbody on the forked tail slider.

Further preferably, the end, far away from the lower die core, of each thread forming insert is connected with an equal-height screw, the equal-height screw is arranged on the lower die plate in a penetrating mode, a spring is arranged between the end, far away from the thread forming insert, of the equal-height screw and the lower die plate, when the upper die driving block drives the thread forming insert to move towards the axis direction of the die, the spring can be extruded, the spring is in a compressed state, when the upper die driving block moves upwards and is separated from the thread forming insert, the spring is required to restore to be free, the generated elastic force moves the thread forming insert towards the axis direction far away from the die, reset of the thread forming insert is achieved, and products are conveniently taken out after thread forming.

Further preferably, the dovetail sliding block is inserted on the upper die core in a vertical inclined manner, the lower end of the dovetail sliding block is close to the central axis of the upper die core, and the upper end of the dovetail sliding block is far away from the central axis of the upper die core, so that the dovetail sliding block can horizontally move relative to the upper die core.

Further preferably, the top of forked tail slider is equipped with the depression bar, the upper end of depression bar is connected with nitrogen spring, nitrogen spring passes through screw and cushion and installs on the upper die base, can provide a decurrent pressure of depression bar through nitrogen spring, and then provide a decurrent power of forked tail slider through the depression bar, when the mould was closed, because the pressure of nitrogen gas, the forked tail slider can be along the orbital motion who designs, forms a confined screw thread, is the product shaping position promptly, the mould die sinking, and the forked tail slider can get back to initial position according to the track of design when the nitrogen gas pressure of upper die disappeared, and initial position is the stripping position promptly, the takeout of the product of being convenient for.

Further preferably, the lower backing plate is provided with a plurality of sliding grooves matched with the thread forming inserts for guiding and limiting the travel of the thread forming inserts.

Further preferably, a lower fixing plate is arranged above the lower backing plate and used for limiting the thread forming insert.

Further preferably, the number of the thread forming inserts and the number of the upper die driving blocks are 12, so that the thread forming precision of a product can be improved, and the thread forming inserts are pushed to move by the upper die driving blocks, so that the thread processing of the product is realized.

Further preferably, the lower end of the upper die core is provided with a bulge, and the upper end of the lower die core is provided with a groove matched with the bulge on the upper die core, so that the combined positioning between the upper die core and the lower die core is realized.

The beneficial effects are that: according to the stamping die structure for thread forming, disclosed by the utility model, the thread extrusion forming of a cylindrical product which is formed by stretching is realized through the matching of the thread forming insert and the thread core, the thread core is divided into the upper die core, the dovetail sliding block and the lower die core, the easy separation of the thread core and the thread part on the inner side of the product is realized, the movable reset of the thread forming insert is realized through a spring and a screw with the same height, the easy separation of the thread forming insert and the thread part on the outer side of the product is realized, the removal of the product after the thread processing is facilitated, the thread is prevented from being blocked on the thread core and being difficult to be removed, and the problem that the stamping die is difficult to process the thread is solved; the thread machining precision and quality of the product can be effectively improved through 12 thread forming inserts; the stamping die structure has ingenious structural design, can effectively solve the problem of operation of processing threads in stamping engineering, does not need to be processed by using an expansion joint forming method, effectively reduces the processing procedures of the threads, and improves the processing efficiency of products.

Drawings

Fig. 1 is a schematic view showing a shaft-side structure of a press mold structure for forming a thread according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an axial structure of a press die structure for forming threads according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram showing a front view of a structure of a press die for forming a thread according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of an upper die structure according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a lower die structure according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of the structure of the upper mold core, dovetail slide, lower mold core and lower shim plate according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a finished thread product according to an embodiment of the present utility model;

FIG. 8 is a schematic cross-sectional view of a mold according to an embodiment of the present utility model;

Fig. 9 is a schematic cross-sectional view of a mold according to an embodiment of the present utility model.

Reference numerals: the novel high-pressure die comprises a 1-upper die holder, a 2-upper fixing plate, a 3-baffle plate, a 4-stripper plate, a 5-lower die plate, a 6-lower die holder, a 7-upper die core, an 8-dovetail sliding block, a 9-upper die driving block, a 10-lower base plate, a 11-lower die core, a 111-slot, a 112-chute, a 12-thread forming insert, a 13-contour screw, a 14-spring, a 15-lower fixing plate, a 16-compression bar, a 17-nitrogen spring and 18-products.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1-9, a stamping die structure for thread forming comprises an upper die holder 1, an upper fixing plate 2, a stop plate 3, a stripper plate 4, a lower die plate 5 and a lower die holder 6 which are sequentially arranged from top to bottom, wherein an upper die core 7 is arranged below the stop plate 3, a dovetail sliding block 8 is inserted into one side of the upper die core 7, a lower base plate 10 is arranged above the lower die holder 6, the lower base plate 10 is arranged in the lower die plate 5, a lower die core 11 matched with the upper die core 7 is fixed on the lower base plate 10, and a slot 111 matched with the dovetail sliding block 8 is arranged on the lower die core 11. The upper die holder 1, the upper fixing plate 2, the stop plate 3, the stripper plate 4, the upper die core 7 and the dovetail slide block 8 are of an upper die structure, and the lower die plate 5, the lower die holder 6, the lower base plate 10 and the lower die core 11 are of a lower die structure. In the application, as the threads on the product 18 are extruded from outside to inside, the threads are protruded relative to a stretched column body and can be clamped on a thread core, in order to prevent the product 18 from being unable to be taken down from the thread core, the thread core is divided into three blocks by the stamping die structure, the stamping die structure comprises an upper die core 7, a lower die core 11 and a dovetail sliding block 8, the threads on the upper die core 7 and the lower die core 11 are all in a half-thread structure, the dovetail sliding block 8 is provided with a full-thread structure of the head part and the tail part of the threads, and when the die is closed, the upper die core 7, the lower die core 11 and the dovetail sliding block 8 are also closed together to form a complete thread core, so that the stamping die structure has a complete thread structure and realizes extrusion forming of the threads; when the die is opened, the upper die core 7 and the lower die core 11 are separated up and down and separated from the threaded part on the inner side of the product 18, and finally the dovetail sliding block 8 moves upwards along with the upper die structure, so that the separation of the threaded core and the product 18 can be realized, and the smooth taking out of the product 18 is ensured.

In the application, a plurality of thread forming inserts 12 are arranged on a lower backing plate 10 in a sliding manner, the plurality of thread forming inserts 12 are arranged along the periphery of a lower mold core 11, the thread forming on a product 18 is realized by simultaneously extruding the plurality of thread forming inserts 12 towards the direction of the lower mold core 11, 12 thread forming inserts 12 and an upper mold driving block 9 are adopted, a formed thread round body is equally divided into 12 parts by the 12 thread forming inserts 12, the 12 thread forming inserts 12 enable the accuracy of formed threads to be higher, and the number of the thread forming inserts 12 can be determined according to the diameter size of the formed product. The 12 thread forming inserts 12 are pushed by the 12 upper die driving blocks 9 to move towards the axis of the die, so that the thread forming is completed. The upper fixing plate 2 is provided with a plurality of upper die driving blocks 9, and the thread forming insert 12 and the upper die driving blocks 9 are provided with mutually matched inclined planes. The screw thread forming insert 12 can be pushed to move horizontally inwards by the descending of the upper die driving block 9, and the product 18 is extruded. The end, far away from the lower die core 11, of each thread forming insert 12 is connected with a contour screw 13, the contour screw 13 penetrates through the lower die plate 5, a spring 14 is arranged between the end, far away from the thread forming insert 12, of the contour screw 13 and the lower die plate 5, and the spring 14 is used for moving and resetting the thread forming inserts 12. When the die is opened, the upper die driving block 9 can synchronously move upwards along with the upper die structure, so that the thread forming insert 12 loses driving force, and the thread forming insert 12 can move along with the equal-height screw 13 in a direction away from the lower die core 11 under the action of the spring 14, so that the thread forming insert 12 is separated from the outer side of the product 18, and the product 18 is conveniently taken out.

In the application, the dovetail slide block 8 is obliquely inserted on the upper mold core 7 up and down, the lower end of the dovetail slide block 8 is close to the central axis of the upper mold core 7, the upper end of the dovetail slide block 8 is far away from the central axis of the upper mold core 7, so that the dovetail slide block 8 can horizontally move relative to the upper mold core 7, when the upper mold core 7 moves upwards, the upper mold core 7 is separated from the inner side threaded part of a product 18, the dovetail slide block 8 horizontally moves relative to the upper mold core 7 and moves towards the central axis direction of the upper mold core 7, namely, the dovetail slide block 8 moves inwards, separation from the inner side threaded part of the product 18 is realized, and the product 18 is conveniently taken out. The top of forked tail slider 8 is equipped with depression bar 16, the upper end of depression bar 16 is connected with nitrogen spring 17, nitrogen spring 17 passes through screw and cushion dress on upper die base 1, a decurrent power of depression bar 16 is provided through nitrogen spring 17, a decurrent power of forked tail slider 8 is provided through depression bar 16, when the mould was closed, because the pressure of nitrogen gas, forked tail slider 8 can along the orbital motion who designs, form a confined screw thread, be product 18 shaping position promptly, the mould die sinking, forked tail slider 8 can get back to the initial position according to the track of design when the nitrogen gas pressure of last mould structure disappears, the initial position is the knockout position promptly, the takeout of the product of being convenient for. In the application, the lower base plate 10 is provided with a plurality of sliding grooves 112 matched with the thread forming inserts 12, so that the limit and movable guide of the thread forming inserts 12 are realized, the thread forming inserts 12 can move back and forth along a set track, and the thread forming quality on the product 18 is ensured.

In the application, a lower fixing plate 15 is arranged above the lower base plate 10 and used for limiting the thread forming insert 12 and preventing the thread forming insert 12 from tilting upwards. The lower fixing plate 15 is provided with a locating pin and a limiting block, so that the die closing precision of the die and the positioning of the product 18 on the die are ensured.

In the application, the lower end of the upper mold core 7 is provided with the bulge, the upper end of the lower mold core 11 is provided with the groove, and the bulge on the upper mold core 7 and the groove on the lower mold core 11 enable the upper mold core 7 and the lower mold core 11 to be completely combined together when the mold is assembled, and the application has the effect of accurate positioning and ensures the accurate matching of the upper mold core 7 and the lower mold core 11.

In the application, the working flow of the stamping die structure is as follows:

The die is closed, along with the descending of the upper die structure, the stripping plate 4 presses and sticks the product 18 to be processed between the stripping plate 4 and the lower fixed plate 15, the upper die core 7 and the dovetail sliding block 8 synchronously descend and are inserted into holes of the product 18 to be processed, meanwhile, the upper die driving block 9 descends and pushes the thread forming inserts 12 to synchronously move inwards (in the axis direction of the die), and the 12 thread forming inserts 12 extrude side wall materials of the product 18 to be processed into the thread structures of the upper die core 7, the dovetail sliding block 8 and the lower die core 11 and are completely attached to complete the thread forming;

The die is opened, the upper die structure is upward, at the moment, the upper die core 7 and the lower die core 11 are separated, and because the threads on the upper die core 7 and the lower die core 11 are of half-thread structures, the dovetail sliding block 8 is provided with a full-thread structure of the head part and the tail part of the threads, the upper die core 7 and the lower die core 11 can be directly separated from the threads on the processed product 18, when the die is opened, the acting force of the compression bar 16 is eliminated when the dovetail sliding block 8 is opened, the dovetail sliding block 8 returns to the initial material removing position according to a designed track, the dovetail sliding block 8 is separated from the threads on the processed product 18, and as the upper die structure continues upward, the upper die driving block 9 is separated from the thread forming insert 12, the thread forming insert 12 is horizontally outward (in the direction away from the axis of the die) under the action of the spring 14, the thread forming insert 12 returns to the initial position, and the thread forming insert 12 is separated from the processed product 18; with the mold fully opened, the upper core 7, dovetail slide 8 are fully separated from the finished product 18, at which point the finished product 18 may be removed.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the summary of the present utility model within the scope of the present utility model.

Claims (8)

1. The utility model provides a stamping die structure for thread forming, includes upper die base (1), last fixed plate (2), backstop board (3), takes off flitch (4), lower bolster (5) and die holder (6) that from the top down set gradually, its characterized in that: the lower side of backstop board (3) is equipped with mold core (7), one side of going up mold core (7) inserts and establishes forked tail slider (8), the top of die holder (6) is equipped with die block (10), die block (10) are installed in lower bolster (5), be fixed with on die block (10) with last mold core (7) matched with lower mould core (11), be equipped with slot (111) of cooperation forked tail slider (8) on lower mould core (11), be equipped with a plurality of screw thread shaping income son (12) of sliding setting on die block (10), a plurality of screw thread shaping income son (12) are along the week side setting of die core (11), install a plurality of last mould driving block (9) of cooperation screw thread shaping income son (12) on fixed plate (2), all be equipped with the inclined plane of mutually supporting on screw thread shaping income son (12) and the last mould driving block (9), the screw thread on going up son (7) and lower son (11) is half screw thread structure on the afterbody of mold core (8).

2. A press die structure for forming threads as defined in claim 1, wherein: the end, far away from the lower die core (11), of each thread forming insert (12) is connected with a contour screw (13), the contour screw (13) is arranged on the lower die plate (5) in a penetrating mode, and a spring (14) is arranged between the end, far away from the thread forming insert (12), of the contour screw (13) and the lower die plate (5).

3. A press die structure for forming threads as defined in claim 1, wherein: the dovetail sliding block (8) is obliquely inserted on the upper mold core (7) from top to bottom, the lower end of the dovetail sliding block (8) is close to the central axis of the upper mold core (7), and the upper end of the dovetail sliding block (8) is far away from the central axis of the upper mold core (7).

4. A press die structure for forming threads as defined in claim 1, wherein: the top of forked tail slider (8) is equipped with depression bar (16), the upper end of depression bar (16) is connected with nitrogen spring (17), nitrogen spring (17) are installed on upper die base (1).

5. A press die structure for forming threads as defined in claim 1, wherein: the lower base plate (10) is provided with a plurality of sliding grooves (112) matched with the thread forming inserts (12).

6. A press die structure for forming threads as defined in claim 1, wherein: a lower fixing plate (15) is arranged above the lower base plate (10).

7. A press die structure for forming threads as defined in claim 1, wherein: the number of the thread forming inserts (12) and the upper die driving blocks (9) is 12.

8. A press die structure for forming threads as defined in claim 1, wherein: the lower end of the upper mold core (7) is provided with a bulge, and the upper end of the lower mold core (11) is provided with a groove matched with the bulge on the upper mold core (7).