CN1062201C - Die device and matching method of forging parts forming machine - Google Patents

Abstract

The present invention provides a die device for a forging component forming machine and a method for using the die device. The die device has a plurality of different standardized main dies and a plurality of sets of peripheral accessories with different specifications and sizes, and some peripheral accessories may also include at least one head die pad or a die pad. The die device can be installed on a same type of machine with the same die accommodating space, or on different types of machine with different die accommodating spaces.

Description

Die device and matching method of forging parts forming machine

The present invention relates to a die device of a forging part forming machine and its matching method, in particular to a die device of a forging part forming machine and its matching method which can assemble or add different standardized accessories in the die as required.

When manufacturing ordinary screws and bolts, they are usually cold forged by a satin forming machine, and then the semi-finished products are subjected to other follow-up operations such as tooth rolling. The operation of the overall mechanism 1 of a general forging parts forming machine is shown in Figure 1. It is mainly to use the two cutting dies 11 of the cutting mechanism to cut off one end of the incoming wire 12 to form a blank 13, and send the blank 13 to the Each stamping die 14 performs multi-station cold forging operation. However, the stamping operation of each station must cooperate with the operations of the punches 15 and the rear outlet rods 16... and other related mechanisms to complete. Because the detailed structure and action of each part of the operation are not the focus of the present invention, so no more illustrate. Fig. 2 is a partial cross-sectional schematic view of a group of stamping mechanisms, the stamping mechanism 2 is provided with a head module 22 in front of the machine table 21, and a main slide plate that can be driven by a flywheel and a crank to reciprocate is provided with a corresponding The punch module 23 of the head module 22, the blank 24 is clamped and transported into the head module 22, and punched and cold forged or punched into the required blank shape through the corresponding punch module 23, Then the billet is passed out by the back-passing rod to carry out the follow-up operation process. The head die group 22 is embedded in the head die seat opening 25 in front of the machine 21, and includes a hollow mold shell 221, and a main mold 222 is sleeved in the mold shell 221, and the main mold 222 is provided with a There is a mold cap 223 screwed on the mold shell 221 to limit the main mold 222 in the mold shell 221 . In addition, in the center of the mold shell 221 and the main mold 222, there is a continuous passage for accommodating the blank 24. The inner wall of the passage is covered with tungsten carbide 225 of sufficient length and hardness, which can resist the impact force generated during stamping. And it is convenient to make the blank 24 obtain a true circle.

In fact, there are many types of screws or bolts, and the length of the thread to be twisted also has certain specifications according to the classification of the overall length, that is, the tungsten carbide 225 is from the mold shell 221 to the preset position of the main mold 222 The length will be different due to the different lengths of the blanks 24, so as long as the specifications change, the matching head module 22 must be different. Due to market demand, competition in sales, and the different lengths of the head sockets 25 of the machine 21, generally large-scale screw and bolt manufacturing factories will be equipped with head blocks 22 of various specifications and sizes to meet the needs. , For example: for the stop screw cup tail of specification M8 (diameter 8mm), the general specification is from M8×35 (length) to M8×95 (length) and a main mold 222 is prepared every 5mm, so the general manufacturer needs to have 18 There are main molds 222 of different sizes, plus 2 main mold spares for each size, and a total of 54 main molds need to be prepared. Another example: the specification of M16 steel half-thread hexagon socket head bolts is from M16×65 to M16×170, generally there must be 20 main molds 222 of different sizes, plus two main mold spare parts for each size, a total of Sixty master models need to be prepared. However, because the main mold is provided with expensive tungsten carbide, the cost of the main mold is relatively high, and the main mold must withstand the impact force during cold forging and is easily damaged. The loss of the main mold is large and the main mold must often be replaced. In addition, a large number of main molds 222 of various sizes need to be prepared for various types of screws and bolts. The manufacturing cost of the molds is quite high, and a large number of molds occupy a lot of storage space on the machine factory site, which is quite wasteful.

In general, small and medium-sized manufacturers in the screw industry, due to their small scale, can receive orders mostly for screws of larger quantities and more commonly used general lengths, while for less common screws that are less commonly used, the orders are given up. connection, so as not to increase the equipment cost of the factory. For the buyer who placed the order, the long screw cannot find a cheap manufacturer to pick it up, so the unit price has increased a lot. In the end, the buyer has to adopt the turnkey method, that is, the manufacturer who needs to accept the order, in the case of a large quantity For ordinary screws, it is necessary to accept orders for small quantities of ordinary screws at the same time. Therefore, in order to improve operating performance and receive more orders, the manufacturing plant has to be equipped with the aforementioned multiple sets of molds in order to keep orders for ordinary screws.

The main purpose of the present invention is to provide a mold device for forging parts forming machine and its use method. Without the need to add main molds of different sizes and specifications, a group of main molds of the same size can be used to reduce the number of molds and save storage space. In some cases, adjust and change multiple sets of header modules with different specifications and sizes in order to reduce costs.

In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is to form a group of main molds of the same size with different tungsten carbide lengths, and a group of peripheral accessories of different sizes composed of mold shells, mold caps and related optional pads. , can be matched and assembled according to the length of the finished product to be formed, so as to form different head modules that can accommodate the length of the blank or the overall length of the setting.

Therefore the mold device of the forging part forming machine of the present invention is composed of multiple sets of head molds, mainly comprising:

Multiple main molds with different specifications. Each main mold has the same cross-sectional diameter and the same shaft length, and the central axis runs through a shaft hole. The walls of the shaft holes of different main molds are covered with certain hardness and Impact-resistant substances of different lengths;

Multiple sets of peripheral accessories. Each set of peripheral accessories has different specifications and sizes and is respectively set on the periphery of the above-mentioned different standardized main molds. After the peripheral accessories are set on the main mold, the interior of the mold as a whole has different billet storage lengths Or there are different peripheral lengths on the periphery of the main mold, and each set of peripheral accessories at least includes: a mold shell sleeved on the periphery of each different standardized main mold, the mold shell has a closed end and an open end, the closed There is a piercing hole in the center of the end that communicates with the shaft hole of the main mold, and the periphery of the hole wall of the piercing hole is provided with an anti-shock material connected with the shaft hole anti-shock material, and the central channel in the connected anti-shock material forms The accommodating length of the above-mentioned blank, wherein the closed end has a thickness A; and a mold cap fixed on the periphery of each main mold and abutted against the open end of the mold shell, the mold cap will limit the main mold to the mold shell Inside;

Some of the sets of peripheral accessories further include at least one header block, which is embedded between the main mold and the closed end of the mold shell, and a connecting hole communicating with the main mold axis hole is provided in the center, and the connecting hole The wall of the hole is covered with a layer of anti-shock material connected to the shaft hole of the main mold, and the cushion block of the head mold has a standardized thickness B, B ≥ 0;

And wherein some sets of peripheral accessories further include at least one mold pad, the mold pad is added on the end side of the main mold and the mold cap, and the center is provided with a through hole connected with the shaft hole of the main mold. The spacer has a thickness C, C≥0.

A mold matching method for forging parts forming machines in the whole factory can be developed by using the above-mentioned mold device, wherein, the mold device can be installed on the same type of machine platform with the mold accommodation space of the socket of the head die seat, and also It can be installed on different types of machines with the mold accommodation space of different head mold sockets. If the head die is to be installed in the same type or a different type of machine, you can choose one of the following methods:

(1). According to the forged parts of different specifications and sizes to be formed on a single standardized main mold, respectively select and match the mold shells, mold caps, head mold pads or mold pads of different sizes in each set of peripheral accessories, so that The insides of each mold have different billet accommodation lengths, and the length of the overall mold device properly matches the mold accommodation space in the machine.

(2). According to the forged parts of different specifications and sizes to be formed, in the same set of peripheral accessories, the main molds of different specifications are respectively selected and matched.

The advantage of the present invention is that: the mold device of the forging part forming machine and its matching method of the present invention can arbitrarily choose and match multiple main molds and peripheral accessories with different specifications and sizes, and cooperate with the assembly pads to adjust and change different specifications and sizes. It is only necessary to use a small number of mold components to start the mold, so it can reduce the manufacturing volume of the mold, reduce the cost, and reduce the storage space of the mold.

Below in conjunction with accompanying drawing and embodiment the present invention is described in detail:

Figure 1 is a schematic cross-sectional view of the relevant mechanisms of the stamping operation of a general forging part forming machine.

Fig. 2 is a partial cross-sectional schematic view of a set of stamping mechanisms.

Fig. 3 is a schematic cross-sectional view of the main components of a set of molds.

Fig. 4 is a schematic cross-sectional view of adding pads to the main components of a set of molds.

Fig. 5 is a schematic cross-sectional view of the first mold of the first or second combined embodiment of the first category of the present invention.

Fig. 6 is a schematic cross-sectional view of a second mold of the first combination embodiment of the first category of the present invention.

Fig. 7 is a schematic cross-sectional view of a third mold of the first combination embodiment of the first category of the present invention.

Fig. 8 is a schematic cross-sectional view of a fourth mold of the first combined embodiment of the first category of the present invention.

Fig. 9 is a schematic cross-sectional view of a fifth mold of the first combined embodiment of the first category of the present invention.

Fig. 10 is a schematic cross-sectional view of the second mold of the second combined embodiment of the first category of the present invention.

FIG. 11 is a schematic cross-sectional view of a third mold of the second combination embodiment of the first category of the present invention.

Fig. 12 is a schematic cross-sectional view of a fourth mold of the second combined embodiment of the first category of the present invention.

Fig. 13 is a schematic diagram of an array of mold devices of the first type in the present invention.

Fig. 14 is a schematic cross-sectional view of the first mold of the first combined embodiment of the second category of the present invention.

Fig. 15 is a schematic cross-sectional view of the second mold of the first combination embodiment of the second category of the present invention.

Fig. 16 is a schematic cross-sectional view of a third mold of the first combined embodiment of the second category of the present invention.

Fig. 17 is a schematic diagram of an array of mold devices of the second type in the present invention.

As shown in Fig. 3, in a kind of forging parts forming machine mold device and matching method thereof in the preferred embodiment of the present invention, the mold device is embedded in the head die seat of the aforementioned forging parts forming machine, and the related forging The structure and operation of the part molding machine are the same as conventional ones, and will not be described here. The mold device of the present invention is made up of multiple sets of head dies in groups. Here, the main components of a set of head dies are used to illustrate, mainly including: a main mold 3, a mold shell 4 and a mold cap 5, the The mold shell 4 and the mold cap 5 are arranged outside the main mold 3, so the mold shell 4 and the mold cap 5 can be said to be peripheral accessories of the mould.

The main mold 3 is a cylinder with a certain transverse section and axial length. The peripheral edge of the rear section of the main mold 3 is inwardly recessed to form a smaller positioning portion 30 of an annular cross section, and the positioning portion 30 is connected to the main mold. 3. An annular positioning shoulder 33 is formed at the intersection of the front section with a larger section. The center of the main mold 3 is axially provided with a hollow shaft hole 31, and the periphery of the front wall of the shaft hole 31 is covered with an anti-shock material of predetermined length and hardness such as tungsten carbide 32, so as to resist the impact force generated during punching and Make blank 24 obtain true circle.

The formwork 4 is a hollow shell, the front end of the formwork 4 has a closed end 40, the closed end 40 has a thickness A, and the rear end of the formwork forms an open end 41, which is sleeved on the periphery of the main form 3 , a ring slot 42 is formed between the opening end 41 and the positioning portion 30 of the main mold 3 rear end, and an internal thread (not shown) is formed on the inner wall of the opening end 41 near the slot 42, and the closed end 40 abuts against the front end of the main mold 3 . The center of the closed end 40 is pierced with a penetration hole 43 communicating with the shaft hole 31 of the main mold 3 , and the hole wall periphery of the penetration hole 43 is also provided with an anti-shock material 44 connected with the shaft hole 31 anti-shock material 32 , The connected central channel in the connected anti-shock material 32, 44 has a blank storage length 45 that can accommodate the blank, and the aperture of this central channel has a certain size and becomes the specification for the classification of the mold device, for example, the aperture is φ16 Then the specification is M16, and if the aperture is φ8, the specification is M8.

The mold cap 5 is a hollow annular body with an L-shaped cross-section, which is nested on the periphery of the positioning part 30 of the main mold 3. The front section of the mold cap 5 is concave and narrowed to form a corresponding embedded mold shell 4. The shrinking section 50 of the slot 42 between the main mold 3, the outer edge of the shrinking section 50 is provided with a compatible external thread (not shown in the figure) corresponding to the internal thread of the opening end 41 of the mold shell 4, the mold cap 5 is screwed on the formwork 4 and the front end of the converging section 50 forms a propping portion 51 . When the converging section 50 of the mold cap 5 is screwed into the socket 42, the abutting portion 51 presses against the positioning shoulder 33 of the main mold 3, and the main mold 3 is clamped and limited in the mold shell 4, thereby It can be seen that the mold shell 4 and the main mold 3 are assembled into one body by the mold cap embedded in the fixed position. The length of the peripheral accessories formed by the mold shell 4 and the mold cap 5 is the overall peripheral length 52 of the mould.

As shown in Fig. 4, the present invention adjusts the length that can accommodate the stamping blank 24 in order to adjust the billet accommodation length 45 inside the mold, and replace the mold shells of different lengths when using the same main mold, and close the mold shell 4 More than one head die cushion block 6 with thickness B is embedded between the end 40 and the front end of the main die 3 . The central part of the head die pad 6 is provided with a connecting hole 60 communicating with the main mold 3 shaft hole 31, and the wall of the connecting hole 60 is also provided with a tungsten carbide 61 that is connected to the impact material 32 of the main mold 3. The billet accommodating length 45 of the mold is extended and adjusted by adding the header block 6 . In order to adjust the peripheral length 52 of the overall exterior of the mould, so that the entire mould can be placed in the mouth of the head die seat with different accommodating lengths on different machines, at least one mold pad 7 with a thickness of C is added to the peripheral accessories. Mold spacer 7 is added on the rear end of this main mold 3 and mold cap 5, so that the axial length of this whole mold is increased, cooperates the depth of the head die seat mouth, and this mold spacer 7 center is provided with the The through hole 70 connected to the shaft hole 31 of the main mold 3 allows the passage bar to pass through the passage of the blank 24 during the operation, and the peripheral setting length 52 of the mold can be changed and adjusted by adding the mold cushion block 7 .

According to the above basic means, the size of the mold can be changed by replacing the main mold 3, the peripheral accessories, namely the mold shell 4, the mold cap 5, or adding the head mold pad 6 and the mold pad 7, so as to form a mold with a change in the fixed distance specification. system. In the following, two types of die device systems of forging parts forming machines will be used for illustration. The first type is a head die for steel half-thread inner hexagonal powerful screws, and the second type is a head die for stop screw cup ends.

Figures 5 to 9 show a first embodiment of a combination of a steel half-tooth inner hexagonal powerful screw mold device of specification M16, which consists of the same main mold A 1 and five sets of peripheral accessories B 1, B 2, and B of different sizes. 3, second 4, second 5 cooperate to form. As shown in Figure 5, the first set of mold M16×65 is provided with the first set of peripheral accessories B1 on the outer cover of the first main mold A1, and the first set of peripheral accessories B1 includes the first mold shell 401 and the first mold cap 501 and a first mold pad 701, and the peripheral setting length 52 of this set of molds is 175mm, which is used to form a 65mm long screw blank, which can be accommodated in the corresponding same length head die seat. Fig. 6 is the second set of mold M16×70, and a second set of peripheral accessories B2 is arranged outside the same first main mold A1, and the second set of peripheral accessories B2 includes a second mold shell 402, a second mold cap 502 and a second mold cushion block 702, wherein the thickness A of the closed end of the second mold shell 402 is slightly increased, and the thickness C of the second mold cushion block 702 is slightly reduced, so that the peripheral setting length of this set of molds is still 175mm, for forming 70mm Long screw blanks. Fig. 7 is the third set of mold M16×100, the third set of peripheral accessories B3 is arranged outside the same first main mold A1, and the third set of peripheral accessories B3 includes a third mold shell 403 and a third head Die cushion block 603, the third mold cap 503 and a third mold cushion block 703, wherein the thickness A of the closed end of the third mold shell 403 is the same as that of the second mold shell, but the thickness of a third head mold cushion block 603 is added inside B, and the thickness C of the third mold cushion block 703 is reduced, so that the peripheral setting length of this set of molds is still 175 to form a 100mm screw blank. Fig. 8 is the fourth set of mold M16×130, a fourth set of peripheral accessories B 4 is arranged outside the same first main mold A 1, and the fourth set of peripheral accessories B 4 includes a fourth mold shell 404, a fourth header The mold spacer 604, the fourth mold cap 504 and a fourth mold spacer 704, and the peripheral setting length of this set of mold is 240, which is used to form a 130mm screw blank. Fig. 9 is the fifth set of mold M16×170, a fifth set of peripheral accessories B5 is arranged outside the same first main mold A1, and the fifth set of peripheral accessories B5 includes a fifth mold shell 405, a fifth head Die cushion block 605 and the 5th mold cap 505, and the peripheral setting length of this cover mold is 240, is used for forming the screw blank material of 170mm. From the comparison of each figure, it can be seen that the main mold and the mold cap are the same, and the closed end of the mold shell, the head mold pad or the mold pad of each set of peripheral accessories can have different thicknesses and dimensions according to the needs, forming a variety of standardized peripherals Accessories.

Figures 5 and 10, 11, 12 show another combination of the second embodiment of the same M16 specification steel half-thread inner hexagonal powerful screw mold device as the above embodiment, which is also formed by a combination of multiple sets of molds, mainly composed of Four sets of main molds A1, A2, A3, and A4 with different tungsten carbide lengths but the same length of the mold bodies are combined and configured to form a set of peripheral accessories B1 of the same size. As shown in Figure 5, the first set of molds M16×65 is the same as the first set of molds in the above-mentioned embodiment, and the first set of peripheral accessories B1 is arranged outside the first main mold A1, and the first set of peripheral accessories B1 Including the first mold shell 401, the first mold cap 501 and the first mold cushion block 701, the peripheral length 52 of this set of mold is 175mm, which is used to form a 65mm screw blank, which can be accommodated in the same length of the head Inside the mouth of the mold base. As shown in Figure 10, the second set of mold M16×75 is to install the first set of peripheral accessories B1 outside the second main mold A2 with a longer length of tungsten carbide, and the peripheral length of the mold is also 175mm, but the inside of the mold Blank storage length extension adjustment, used to form 75mm screw blank. As shown in Figure 11, the third set of mold M16×85 is set with the same first set of peripheral accessories B1 outside the third main mold A3 with a longer length of tungsten carbide, and the peripheral length of the mold is also 175mm, but the mold The internal blank storage length has been extended, so 85mm screw blanks can be formed. As shown in Figure 12, the fourth set of mold M16×95 is to install the first set of peripheral accessories B1 outside the fourth main mold A4 with a longer length of tungsten carbide. The peripheral length of the mold is also 1175mm, and the mold The length of the internal billet storage has been extended, and it can form 95mm screw blanks.

The present invention provides a mold matching method for a forging part forming machine in the whole factory. The method uses the above-mentioned mold device, and the mold device can be installed in the same mold accommodation space (that is, the socket of the head die) The same type of machine can also be installed on different types of machines with different mold capacity.

If the mold installation is used in the same type of machine, you can choose one of the following methods:

(1). According to the different specifications and sizes of the forging parts to be formed on a single standardized main mold A1, the mold shells and head pads of different sizes in each set of peripheral accessories B1, B2, and B3 are respectively selected. Blocks or mold pads, but the sum of the lengths of the peripheral accessories used here is the same size, so that the interior of each mold has different blank storage lengths, and the length of the overall mold device is the same, so as to match the same type of machine. The same mold accommodates space.

A group of multiple sets of molds provided by this method, as shown in the aforementioned first combination embodiment, is a horizontal combination shown in FIG. 13 .

(2). According to the different specifications and sizes of the forged parts to be formed, in the same set of peripheral accessories B1, select and embed different standardized main molds A1, A2, A3, and A4 respectively.

A group of multiple sets of molds provided by this method, as shown in the aforementioned second combination embodiment, is a tandem combination shown in FIG. 13 .

If the mold installation is used in different types of machines, you can choose one of the following methods:

(1). According to the different specifications and sizes of the forging parts to be formed on a single standardized main mold A1, select and match different sizes of peripheral accessories B1, B2, B3, B4, and B5 respectively. The mold shell, the header block or the mold block, but the sum of the lengths of the peripheral accessories used here has different sizes, so that the interior of each mold has different blank storage lengths, and the length of the overall mold device conforms to The length of the mold space for different types of machines. A group of multiple sets of molds provided by this method, as shown in the aforementioned first combination embodiment, is a horizontal combination shown in FIG. 13 .

(2). According to the different specifications and sizes of the forged parts to be formed, in the same set of peripheral accessories B, the different standardized main molds A1, A2, A3, and A4 are respectively selected and matched.

A group of multiple sets of molds provided by this method, as shown in the aforementioned second combination embodiment, is a wale combination shown in FIG. 13 .

It can be seen from the above description that the first combination embodiment of the mold device of the present invention is assembled by using a main mold of the same single specification and other sets of peripheral accessories of different specifications, while the second combination embodiment is Multiple sets of molds of different specifications are assembled by using multiple main molds with different internal specifications but the same external specifications, and a peripheral accessory of the same specification. As shown in Figure 13, the mold device of the present invention has four main molds A1, A2, A3, and A4 of different internal specifications and five sets of peripheral accessories B1, B2, B3, and B of different specifications. 4, B 5, if the mold assembled by the method of the first combination embodiment is used as a row and the mold assembled by the method of the second embodiment is used as a column, the mold system assembled by this row and column forms a certain The array of distance specifications changes from M16×65 to M16×200 to 20 different specifications of molds, but only four main molds are needed (twelve main molds in total with spare parts), which is very convenient and practical and can reduce Mold cost and save on-site storage space.

Figures 14, 15 and 16 show another type of mold device, which is a combination of M8 stop screw cup tail mold devices. Its first embodiment is composed of multiple sets of molds, consisting of the same main mold 1 and three sets of peripheral accessories D 1 , D 2 , and D 3 of different sizes are formed by selecting one of them to cooperate. As shown in Figure 14, the first set of mold M8×35 is provided with the first set of peripheral accessories D1 outside the first main mold C1, and the first set of peripheral accessories D1 includes the first mold shell and the first mold cap, so that The peripheral setting length of this set of molds is 5mm. To form a blank of 35mm, it can be accommodated in the opening of the head mold seat with the same length as the machine. As shown in Figure 15, the second set of molds M8×65 is provided with a second set of peripheral accessories D 2 outside the same first main mold C 1, and the second set of peripheral accessories D 2 includes a second mold shell, a second Heading mold cushion block, second mold cap and a second mold cushion block, and the peripheral setting length of this set of molds is 170mm, which is used to form a 65mm blank. As shown in Figure 16, the third set of mold M8×95 is provided with a third set of peripheral accessories D3 outside the same first main mold C1, and the third set of peripheral accessories D3 includes a third mold shell, two third Heading mold pad, the third mold cap and a third mold pad, and the peripheral setting length of this set of molds is 170mm, which is used to form a 95mm blank.

As shown in Figure 17, the stop screw cup tail mold device of this specification M8 has six main molds C1, C2, C3, C4, C5, and C6 with different specifications, that is, the carbonization of each main mold. The tungsten lengths are all different, but the external specifications are the same. These different main molds can be paired with peripheral accessories of the same specification, for example, the first set of peripheral accessories D1 can be combined into six types with the same peripheral setting length but different blanks. Die combination with material holding length.

The assembly method is the same as the mold device of the steel half thread hexagon socket head cap powerful screw, and will not be described again.

It can be seen from the above description that in the set screw cup tail mold device of the present invention, the first combination embodiment is formed by using a main mold of the same single specification and other groups of peripheral accessories of different specifications. The second combination is to use multiple main molds with different specifications to cooperate with a peripheral accessory of the same specification to form multiple sets of molds with different specifications. As shown in Figure 17, the stop screw cup tail mold device of the present invention has six main molds of different specifications and three sets of peripheral accessories of different specifications. The moulds assembled in the second embodiment are columns, and the mold system formed by the rows and columns forms an array of changing specifications at a certain distance, and the molds with 18 different specifications are changed from M8×35 to M8×120 at a fixed distance. But only 6 main models are needed, which is quite convenient and practical.

Claims (3)

1. A mold device for a forging part forming machine, which is composed of multiple sets of molds, is characterized in that it includes: A single standardized main mold has a cross-sectional diameter and an axial length, and a shaft hole is formed axially through the center, and the wall of the shaft hole is covered with an anti-shock material; Multiple sets of peripheral accessories. Each set of peripheral accessories has different specifications and sizes and is respectively sleeved on the periphery of the above-mentioned single main mold. After the peripheral accessories are set on the main mold, the interior of the mold as a whole has different billet storage lengths or main molds. The periphery has different peripheral lengths, and each set of peripheral accessories at least includes: a mold shell sleeved on the periphery of the single main mold, the mold shell has a closed end and an open end, and a center of the closed end is provided with the A piercing hole connected to the shaft hole of the main mold. The wall periphery of the piercing hole is also provided with an anti-shock material connected with the shaft hole anti-shock material. The central channel in the extended anti-shock material forms the above-mentioned blank accommodating length, the closed end has a thickness A; and a mold cap that is sleeved on the periphery of the main form and abutted against the open end of the formwork, the form cap limits the main form in the formwork; Some of the sets of peripheral accessories further include at least one header block, the header block is embedded between the main mold and the closed end of the mold shell, and a connecting hole communicating with the main mold axis hole is provided in the center, The hole wall of the connecting hole is covered with a layer of anti-shock material connected with the shaft hole of the main mold, and the pad of the head mold has a thickness B, and B≥0; and Some of the sets of peripheral accessories further include at least one mold cushion block, which is added on the end side of the main mold and the mold cap, and the center is provided with a through hole connected with the shaft hole of the main mold. The spacer has a thickness C, C≥0. 2. A mold device for a forging part forming machine, which is composed of multiple sets of molds, is characterized in that it includes: There are many main molds with different specifications. Each main mold has the same cross-sectional diameter and the same shaft length. There is a shaft hole in the central axis of the main mold. The shaft holes of different main shafts are covered with different lengths of anti-corrosion flushing substance; Multiple sets of peripheral accessories. Each set of peripheral accessories has different specifications and sizes and is respectively set on the periphery of the above-mentioned different standardized main molds. After the peripheral accessories are set on the main mold, the interior of the mold as a whole has different billet storage lengths Or the periphery of the main mold has different peripheral lengths, and each set of peripheral accessories at least includes: a mold shell set on the periphery of each different standardized main mold, the mold shell has a closed end and an open end, and at the closed end A piercing hole communicated with the shaft hole of the main mold is provided in the center, and an anti-shock material connected with the shaft hole anti-shock material is also provided on the periphery of the hole wall, and the central passage in the extended anti-shock material The above-mentioned billet accommodation length is formed, the closed end has a thickness A; and a mold cap is sleeved on the periphery of the main mold and abutted against the open end of the mold shell, and the mold cap limits the main mold to the mold shell Inside; Some of the sets of peripheral accessories further include at least one header block, the header block is embedded between the main mold and the closed end of the mold shell, and a connecting hole communicating with the main mold axis hole is provided in the center, The hole wall of the connecting hole is covered with a layer of anti-shock material connected with the shaft hole of the main mold, and the pad of the head mold has a thickness B, and B≥0; and Some of the sets of peripheral accessories further include at least one mold cushion block, which is added on the end side of the main mold and the mold cap, and the center is provided with a through hole connected with the shaft hole of the main mold. The spacer has a thickness C, C≥0. 3. A mold matching method for a forging parts forming machine in the whole factory, the method uses the mold device as described in claim 1, the mold device can be installed on the same type of machine with the same mold accommodation space, and can also be installed Installed on different types of machines with different mold capacity spaces; If the mold installation is used in the same type of machine, choose one of the following methods: (1). According to the different specifications and sizes of the forging parts to be formed on a single standardized main mold, respectively select and match different sizes of mold shells, head mold pads or mold pads in each set of peripheral accessories, and the overall shape of each mold There are different blank storage lengths inside, and the overall mold device has the same length to match the same mold storage space in the same type of machine; (2). According to the different specifications and sizes of the forging parts to be formed, in the same set of peripheral accessories, select and match the different standardized main molds; If the mold installation is used in different types of machines, choose one of the following methods: (1). According to the different specifications and sizes of the forging parts to be formed on a single standardized main mold, respectively select and match different sizes of mold shells, head mold pads or mold pads in each set of peripheral accessories, and the overall shape of each mold There are different blank storage lengths inside, and the length of the overall mold device is equal to the length of different mold storage spaces of different types of machines; (2). According to the different specifications and sizes of the forging parts to be formed, in the same set of peripheral accessories, the different standardized main molds are respectively selected and matched.

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