A multi-station die holder applicable to deep-hole forgings of projectile-like parts

Abstract

The present invention discloses a multi-station die holder applicable to deep-hole forgings of projectile bodies, which includes a female die unit and a male die unit cooperating with the female die unit. The female die unit includes two juxtaposed female dies and four male dies arranged in a cross shape and movably cooperating with the female dies. The four male dies are fixedly installed at the bottom of a moving plate, and the moving plate is installed in a sliding groove of an upper template and can be driven to move horizontally so as to drive the male dies to move, thereby realizing the extrusion of forgings in the female dies at four extrusion stations. The present invention can realize the production of deep-hole forgings of projectile bodies, and can realize the production with up to four working steps and two stations, that is, at most four extrusion forming operations and simultaneously extruding two products.

Description

Technical Field

[0001] The present invention relates to the technical field of deep hole machining of projectiles, and particularly to a multi-station die base suitable for deep hole forgings of projectiles. Background Art

[0002] With the gradual increase in the market demand for deep hole extrusion forgings of projectiles, the demand of each manufacturer for technological transformation of existing equipment is also increasing day by day. Deep hole extrusion parts of projectiles have characteristics such as a very long overall length and a large inner hole depth-diameter ratio. Forging equipment for such parts generally needs to be customized non-standard, and parameters such as the extrusion stroke and ejection stroke of the equipment need to be lengthened. Facing the high equipment purchase cost, many manufacturers have lost the opportunity for transformation and upgrading due to problems such as insufficient funds and the inability of existing equipment to meet the requirements. Summary of the Invention

[0003] The purpose of the present invention is to provide a multi-station die base suitable for deep hole forgings of projectiles in view of the technical defects existing in the prior art.

[0004] The technical solution adopted to achieve the purpose of the present invention is as follows:

[0005] A multi-station die base suitable for deep hole forgings of projectiles includes a female die unit and a male die unit cooperating with the female die unit. The female die unit includes two juxtaposed female dies and four male dies arranged in a cross shape and movably cooperating with the female dies. The four male dies are fixedly installed at the bottom of a moving plate. The moving plate is installed in a sliding groove of an upper template and can be driven to move horizontally to drive the male dies to move, so as to extrude the forgings in the female dies at four extrusion stations.

[0006] Wherein, a slide rail is installed in the sliding groove, and the moving plate makes a linear reciprocating motion under the drive of a moving drive mechanism through the slide rail, so as to extrude the forgings in the female dies at four extrusion stations.

[0007] Wherein, limiting blocks are arranged on both sides in the length direction of the sliding groove, and can be driven to move linearly in the limiting grooves to limit the moving plate.

[0008] Wherein, a cross-shaped conical positioning key that can be driven to lift and lower is arranged in the moving plate, and three positioning hole positions corresponding to the cross-shaped conical positioning key are arranged on a positioning template above the moving plate.

[0009] Wherein, a ejector rod is arranged at the bottom of each female die to eject the forging after forming.

[0010] The present invention can realize the production of deep hole forgings of projectiles, and can realize production with a maximum of four working steps and two stations, that is, at most four extrusion forming operations and simultaneously extruding two products. Brief Description of the Drawings

[0011] Figure 1 This is a structural diagram of a multi-station die base suitable for projectile-type deep-hole forgings;

[0012] Figure 2 is a top view schematic diagram of the moving plate part;

[0013] Figures 3 - 5 They are schematic diagrams of the movement and coordination of four punches and two concave dies;

[0014] Figure 6 is a schematic diagram of the positioning surface of the moving plate;

[0015] Figure 7 It is a schematic diagram of the open and closed states of the discharge plate;

[0016] 1. Ejector hydraulic cylinder 2. Lower template 3. Pad 4. Ejector rod of die 1 5. Ejector rod of die 2 6. Die 1 7. Die 2 10. Upper template 11. Positioning template 12. Cross cone positioning key 13. Positioning hydraulic cylinder 14. Unloading device 15. Guide pillar and guide sleeve 16. Mobile push-pull hydraulic cylinder 17. Mobile slide rail 18. Three-station punch 19. One-station punch 20. Four-station punch 21. Two-station punch 22. Mobile plate 23. Limit block 24 Limit hydraulic cylinder 25. Fixed slide rail 26 Unloading cylinder 27 Cylinder fixed plate 28 Unloading plate 29 Unloading pressure plate;

[0017] a1 is the positioning surface of the pick-and-place station, a2 is the positioning surface of the second and fourth stations, and this positioning surface is positioned and given way by the hydraulic cylinder pushing and pulling the limit block, a4 is the station positioning surface, and a5 is the positioning surface of the first and third stations. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The invention uses a fixed concave die and a movable convex die together, installs two concave dies and four convex dies, and includes four extrusion stations and three movable stations.

[0020] like Figure 1As shown in the figure, the present invention is applicable to a multi-station die holder for deep-hole forgings of projectile bodies, including a female die unit and a male die unit cooperating with the female die unit. The female die unit includes two immovable female dies 6 and 7 fixedly arranged side by side on a backing plate 3 above a lower template 2, and four male dies arranged in a cross shape and movably cooperating with the female dies, including a three-station male die 18, a one-station male die 19, a four-station male die 20, and a two-station male die 21. The four male dies are fixedly installed at the bottom of a moving plate 22, and the moving plate is installed in a sliding groove of an upper template 10. The moving plate 22 can be horizontally moved driven by a linear power driving mechanism, thereby driving the male dies to move. Therefore, the forgings in the female dies 6 and 7 are extruded at four extrusion stations.

[0021] Specifically, the one-station male die 19 and the three-station male die 18 are in one row, and the two-station male die 21 and the four-station male die 20 are in one row. During each extrusion, two male dies simultaneously correspond to two female dies, and the one-station and three-station or two-station and four-station extrusions can be carried out simultaneously.

[0022] Among them, the moving plate has three moving stations, namely: a first extrusion station, a third extrusion station, a second extrusion station, a fourth extrusion station, and a picking and placing station. The first extrusion station and the third extrusion station are the stations when the one-station male die 19 and the three-station male die 18 are respectively coaxial with the center lines of the female die 6 and the female die 7; the second and fourth extrusion stations are the stations when the two-station male die 21 and the four-station male die 20 are respectively coaxial with the center lines of the female die 6 and the female die 7; the picking and placing station is the station when the moving plate 22 moves all four punches out of the working area to make space for picking and placing the blank.

[0023] Among them, in order to ensure the effective movement of the moving plate, a slide rail assembly is used to realize the movement of the moving plate. Among them, a fixed slide rail 25 is arranged in the sliding groove, and a moving slide rail 17 is correspondingly configured on the moving plate. They cooperate with each other to realize the linear movement of the moving plate driven by a moving push-pull hydraulic cylinder 16, and realize the horizontal movement of the four male dies arranged in a cross shape.

[0024] Furthermore, in order to prevent the male dies at the four stations from shifting during sliding, a cross conical positioning key 12 is used to correct the position of the male dies at the extrusion station. The cross conical positioning key is placed at the middle position of the four male dies and is connected to a positioning template 11 to correct the position of the male dies. The cross key corrects the positions in the front, back, left, and right directions, and the conical key corrects the center position. The cross key and the conical key are used in combination to improve the position accuracy of the moving male dies. Among them, the cross conical positioning key is connected to a positioning hydraulic cylinder 13 for telescopic movement to realize the above positioning function. That is, the front, back, left, right, and center positioning of the four male dies is corrected through the connection between the cross conical positioning key 12 and the positioning template 11.

[0025] Among them, the four punches on the moving plate 22 and the moving plate 22 can be positioned and locked in a shaft-hole manner. For example, positioning holes are formed on the moving plate, and the top of the punch is correspondingly inserted into the positioning for positioning and then fixed and locked with the moving plate by bolts, or fixed in other ways, which is not specifically limited.

[0026] Furthermore, the positioning template 11 and the upper template 10 are positioned and locked in a keyway manner, and the positioning relationship between the moving plate 22 and the upper template 10 is ensured by the positioning template 11.

[0027] Driven by the hydraulic cylinder, the moving plate slides between three moving stations respectively. When the moving plate 22 moves, the cross-cone positioning key 12 retracts into the moving plate 22. When the moving plate 22 moves to the first and third extrusion stations and the second and fourth extrusion stations, the cross-cone positioning key 12 is pushed by the hydraulic cylinder and enters the cross-cone keyway of the positioning template 11 to correct the front, back, left, right and middle positions of the four punches of the workpiece, and reduce the influence of the clearances of the sliding components on the coaxiality of the upper and lower dies.

[0028] Among them, the punch unit cooperating with the die unit is guided by the guide pillar and guide sleeve 15, which ensures the positional relationship between the upper template 10 and the lower template 2. The clearance between the guide pillar and the guide sleeve is about 0.2mm on one side. Among them, the guide pillar is fixed to the lower template, and the guide sleeve is fixed to the upper die.

[0029] Among them, limit blocks 23 are arranged on both sides in the length direction of the sliding groove and can move linearly in the limit groove to limit the moving plate. The limit blocks 23 are symmetrically arranged on both sides of the sliding groove and are respectively connected to the corresponding limit hydraulic cylinders 24, and are driven by the limit hydraulic cylinders to move linearly to achieve limiting.

[0030] Furthermore, ejector rods are respectively arranged at the bottom of the die, including the first die ejector rod 4 and the second die ejector rod 5, to eject after the forging is formed. Among them, the first die ejector rod 4 and the second die ejector rod 5 are respectively connected to an ejecting hydraulic cylinder 1.

[0031] In the present invention, the relative positions of the first die 6 and the second die 7 remain unchanged, and the third-station punch 18, the first-station punch 19, the fourth-station punch 20, and the second-station punch 21 move simultaneously with the moving plate. Figure 3 As shown, it is the picking and placing station, and the moving plate 22 moves all the punches out of the extrusion area. Figure 4 As shown, it is the first and third extrusion stations. The moving plate 22 moves the third-station punch 18 and the first-station punch 19 into the working area. The center line of the first-station punch 19 is coaxial with the center line of the first die 6, and the center line of the third-station punch 18 is coaxial with the center line of the second die 7. Figure 5Shown are the second and fourth extrusion stations. The moving plate 22 moves the second-station punch 21 and the fourth-station punch 20 into the working area. The second-station punch 21 is coaxial with the center line of the first die 6, and the fourth-station punch 20 is coaxial with the center line of the second die 7 and the part 19.

[0032] Furthermore, in the present invention, a blank unloading device 14 is also provided. Among them, the blank unloading device 14 includes two blank unloading cylinders 26, two cylinder fixing plates 27, two blank unloading plates 28 and a blank unloading pressing plate 29.

[0033] The two blank unloading plates are symmetrically arranged, and corresponding semi-circular grooves are formed on the opposite surfaces. They are located above the feeding port of the die. Driven by the blank unloading cylinders 26 of the two blank unloading plates, they perform synchronous opening or closing actions to achieve blank unloading. When closed, the two semi-circular grooves form a small circular hole relatively, which is located above the feeding port of the die. Since the diameter of this small circular hole is smaller than the feeding port of the die, after closing, only the punch can enter and exit the die, and the blank cannot enter or exit. After opening, the blank or forging can be taken out; the blank unloading cylinders 26 are respectively installed on the cylinder fixing plates 27 and are located outside the cylinder fixing plates. The two blank unloading cylinders are symmetrically arranged. The blank unloading pressing plate 29 is located above the cylinder fixing plate, and corresponding feeding and discharging holes for the die are formed on it. It presses on the blank unloading plate and is in sliding contact connection with the blank unloading plate 28, playing a guiding role in the movement of the blank unloading plate 28. The cylinder fixing plate is fixed to the blank unloading pressing plate.

[0034] As Figure 7 shown, the left side is the open state of the blank unloading plate, and the opening and closing distance is 50 mm on one side. At this time, the forging can enter and exit the mold smoothly. As Figure 7 shown, the right side is the closed state of the blank unloading plate. At this time, the punch can realize the process of extruding the forging. After the extrusion is completed, the forging is blocked by the blank unloading plate and cannot exit the mold with the punch together, so that the forging is completely separated from the punch. When the punch is removed from the extrusion area, then the blank unloading plate is opened, and the forging is ejected by the ejector rod and the forging is taken out.

[0035] Working process:

[0036] Mold starting position: The punch is at the top dead center, the moving plate is in contact with the positioning surface a1 at the loading and unloading station, the positioning surface a2 retracts to the zero position (the avoidance position when not in use), the cross conical positioning key is in the moving plate, the unloading device is opened, and the ejector rod retracts. Heat the blank to 1200 ± 20 °C, and remove the oxide scale first after taking it out of the furnace. Place the blank into the first female mold, move the pushing plate to contact the positioning surface a5, reach the first and third extrusion stations, that is, the position where the punch of the first station is coaxial with the first female mold on the center line. Then, push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate. The unloading device is closed, and then the punch descends to extrude and form the forging of the first station. After extrusion is completed, the punch rises. The cross conical positioning key resets, and the positioning surface a2 is pushed out by the oil cylinder. Move the moving plate to the position of the positioning surface a2, reach the second and fourth extrusion stations, that is, the position where the punch of the second station is coaxial with the first female mold on the center line. Then, push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate. Then, the punch descends to extrude and form the forging of the second station. After extrusion is completed, the punch rises. The cross conical positioning key resets, the positioning surface a2 retracts, and the unloading device is opened. The moving plate moves to the positioning surface a1 to enter the loading and unloading station, all the punches move out of the working area, the ejector cylinder ejects the extruded part in the first female mold, and the forging of the second working step is taken out manually or by a manipulator. The ejector retracts.

[0037] Put the forging of the second working step into the second female mold, move the pushing plate to contact the positioning surface a5, reach the first and third extrusion stations, that is, the position where the punch of the third station is coaxial with the second female mold on the center line. Then, push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate. The unloading device is closed, and then the punch descends to extrude and form the forging of the third station. After extrusion is completed, the punch rises. The cross conical positioning key resets, and the positioning surface a2 is pushed out by the oil cylinder.

[0038] Move the moving plate to the position of the positioning surface a2, reach the second and fourth extrusion stations, that is, the position where the punch of the fourth station is coaxial with the second female mold on the center line. Then, push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate. Then, the punch descends to extrude and form the forging of the fourth station. After extrusion is completed, the punch rises. The cross conical positioning key resets, the positioning surface a2 retracts, and the unloading device is opened. The moving plate moves to the positioning surface a1 to enter the loading and unloading station, all the punches move out of the working area, the ejector cylinder ejects the extruded part in the first female mold, and the forging of the fourth working step is taken out manually or by a manipulator. The ejector rod retracts.

[0039] Example 1:

[0040] Initial position of the die: The punch is at the top dead center, the moving plate is in contact with the positioning surface a1 at the loading and unloading station, the positioning surface a2 retracts to the zero position (the avoidance position when not in use), the cross conical positioning key is in the moving plate, the unloading device is open, and the ejector rod retracts. The blank is heated to 1150 ± 20 °C. After being taken out of the furnace, the oxide scale is removed first.

[0041] Place the blank into the first female die. Move the pushing plate to contact the positioning surface a5 and reach the first and third extrusion stations, that is, the position where the punch of the first station is coaxial with the first female die in the center line. Then, push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate. The unloading device closes, and then the punch descends to extrude and form the forging of the first station. After extrusion is completed, the punch rises. The cross conical positioning key resets, and the positioning surface a2 is pushed out by the oil cylinder. Move the moving plate to the position of the positioning surface a2 and reach the second and fourth extrusion stations, that is, the position where the punch of the second station is coaxial with the first female die in the center line. Then, push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate. Then, the punch descends to extrude and form the forging of the second station. After extrusion is completed, the punch rises. The cross conical positioning key resets, the positioning surface a2 retracts, and the unloading device opens. The moving plate moves to the positioning surface a1 to enter the loading and unloading station. All punches move out of the working area. The ejector cylinder ejects the extruded part in the first female die, and the forging of the second working step is taken out manually or by a manipulator. The ejector retracts. Place the forging of the second working step into the second female die. Move the pushing plate to contact the positioning surface a5 and reach the first and third extrusion stations, that is, the position where the punch of the third station is coaxial with the second female die in the center line. Then, push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate. The unloading device closes, and then the punch descends to extrude and form the forging of the third station. After extrusion is completed, the punch rises. The cross conical positioning key resets, and the positioning surface a2 is pushed out by the oil cylinder.

[0042] Move the moving plate to the position of the positioning surface a2 and reach the second and fourth extrusion stations, that is, the position where the punch of the fourth station is coaxial with the second female die in the center line. Then, push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate. Then, the punch descends to extrude and form the forging of the fourth station. After extrusion is completed, the punch rises. The cross conical positioning key resets, the positioning surface a2 retracts, and the unloading device opens. The moving plate moves to the positioning surface a1 to enter the loading and unloading station. All punches move out of the working area. The ejector cylinder ejects the extruded part in the first female die, and the forging of the fourth working step is taken out manually or by a manipulator. The ejector rod retracts.

[0043] Example 2:

[0044] Initial position of the die: The punch is at the top dead center, the moving plate is in contact with the positioning surface a1 at the loading and unloading station, the positioning surface a2 retracts to the zero position (the avoidance position when not in use), the cross conical positioning key is in the moving plate, the unloading device is open, and the ejector rod retracts. Heat the blank to 1150 ± 20 °C, and remove the oxide scale first after taking it out of the furnace. Place the blank into the first female die, move the pushing plate to contact the positioning surface a5, reach the first and third extrusion stations, that is, the position where the center lines of the punch in the first station and the first female die are coaxial, then push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the four punches on the moving plate, close the unloading device, and then the punch descends to extrude and form the forging in the first station. After extrusion is completed, the punch lifts. The cross conical positioning key resets, and the positioning surface a2 is pushed out by the oil cylinder. Move the moving plate to the position of the positioning surface a2, reach the second and fourth extrusion stations, that is, the position where the center lines of the punch in the second station and the first female die are coaxial, then push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate, and then the punch descends to extrude and form the forging in the second station. After extrusion is completed, the punch lifts. The cross conical positioning key resets, the positioning surface a2 retracts, and the unloading device opens. Move the moving plate to the positioning surface a1 to enter the loading and unloading station, all punches move out of the working area, the ejector cylinder ejects the extruded parts in the first female die, and the forging in the second working step is taken out manually or by a manipulator. The ejector retracts. Place the forging in the second working step into the second female die, take out a new blank from the heating furnace and put it into the first female die. Move the pushing plate to contact the positioning surface a5, reach the first and third extrusion stations, that is, the position where the center lines of the punch in the first station and the first female die are coaxial, and the center lines of the punch in the third station and the second female die are coaxial, then push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate, close the unloading device, and then the punch descends to extrude and form the forging in the first station and the forging in the third station. After extrusion is completed, the punch lifts. The cross conical positioning key resets, and the positioning surface a2 is pushed out by the oil cylinder. Move the moving plate to the position of the positioning surface a2, reach the second and fourth extrusion stations, that is, the position where the center lines of the punch in the second station and the first female die are coaxial, and the center lines of the punch in the fourth station and the second female die are coaxial, then push the middle cross conical positioning key into the keyway of the positioning template to correct the left, right, front, back, and middle positions of the 4 punches on the moving plate, and then the punch descends to extrude and form the forging in the second station and the forging in the fourth station. After extrusion is completed, the punch lifts. The cross conical positioning key resets, the positioning surface a2 retracts, and the unloading device opens. Move the moving plate to the positioning surface a1 to enter the loading and unloading station, all punches move out of the working area, the ejector cylinder ejects the extruded parts in the first female die and the second female die, and the forging in the second working step and the forging in the fourth working step are taken out manually or by a manipulator. The ejector rod retracts. Place the forging in the second working step into the second female die, take out a new blank from the heating furnace and put it into the first female die. Repeat the previous extrusion action sequence.

[0045] The present invention is applicable to deep-hole extrusion forgings, especially the extrusion of forgings with an inner hole depth-to-diameter ratio greater than 7. Usually, deep-hole extrusion parts require multiple extrusions to meet the product requirements. This die carrier can achieve an extrusion forming process with up to four working steps and two working positions. The up to four working steps can be applied to the one-step extrusion process, two-step extrusion process, three-step extrusion process, and four-step extrusion process. The up to two-position extrusion means extruding one product at a time and simultaneously extruding two products.

[0046] The present invention is applicable to the situation where the stroke of the existing equipment and the ejection stroke are insufficient. Generally, the length of deep-hole extrusion parts is very long. When a normal die carrier extrudes deep-hole forgings, a larger stroke is required to take out the forgings after the punch is lifted. After the extrusion process is completed, the present invention can move the punch out of the extrusion area, leaving space for placing and removing the blank and the forging, greatly reducing the required stroke. Without replacing the equipment, the multi-station deep-hole extrusion process can still be completed.

[0047] The whole of the present invention is mainly based on mechanical connection and mechanical limit, supplemented by hydraulic push-pull. The moving punch uses a hydraulic cylinder as the driving force. The four extrusion stations and three moving stations all achieve the purpose of mechanical positioning through hydraulic means, and achieve a stable, reliable and accurate use effect.

[0048] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A multi-station die holder applicable to deep-hole forgings of projectile bodies, characterized in that, it is used for four-time extrusion forming and simultaneously extrudes two products, including four extrusion stations and three moving stations. For each extrusion, two punches simultaneously correspond to two dies, and the extrusion of the first and third stations or the second and fourth stations is carried out simultaneously; it includes a die unit and a punch unit that cooperates with the die unit. The die unit includes two dies arranged side by side. The punch unit includes four punches arranged in a cross shape that movably cooperate with the dies. The four punches are fixedly installed at the bottom of a moving plate. The moving plate is installed in a sliding groove of an upper template and can be driven to move horizontally to drive the punches to move, so as to extrude the forgings in the dies at the four extrusion stations; there is a loading and unloading station on the moving plate. At the loading and unloading station, the moving plate moves all four punches out of the working area to make room for loading and unloading the blank. A cross-shaped conical positioning key that can be driven to lift and lower is arranged in the moving plate, and three positioning hole positions corresponding to the cross-shaped conical positioning key are arranged on a positioning template above the moving plate; Driven by a hydraulic cylinder, the moving plate slides between the three moving stations. When the moving plate moves, the cross-shaped conical positioning key retracts into the moving plate. When the moving plate moves to the first and third extrusion stations and the second and fourth extrusion stations, the cross-shaped conical positioning key is pushed by the hydraulic cylinder and enters the cross-shaped conical key groove of the positioning template to correct the front, back, left, right and middle positions of the four punches, and reduce the influence of the gaps between the sliding components on the coaxiality of the upper and lower dies; It also includes a blank unloading device. The blank unloading device includes two blank unloading cylinders, two cylinder fixing plates, two blank unloading plates and a blank unloading pressing plate; the two blank unloading plates are symmetrically arranged, and corresponding semi-circular grooves are formed on the opposite surfaces, located above the feed inlet of the die. Driven by the blank unloading cylinders, the two blank unloading plates are synchronously opened or closed to achieve blank unloading; when closed, the two semi-circular grooves form a circular hole relatively, located above the feed inlet of the die. The diameter of the circular hole is smaller than the feed inlet of the die. After closing, only the punches can enter and exit the die, and the blank cannot enter or exit. After opening, the blank or forging is taken out; the blank unloading cylinders are respectively installed on the cylinder fixing plates and are located outside the cylinder fixing plates. The two blank unloading cylinders are symmetrically arranged. The blank unloading pressing plate is located above the cylinder fixing plates, and corresponding inlet and outlet holes for the die are formed on it. It presses on the upper part of the blank unloading plates and is in sliding contact connection with the blank unloading plates to guide the movement of the blank unloading plates. The cylinder fixing plates and the blank unloading pressing plate are fixed.

2. The multi-station die holder applicable to deep-hole forgings of projectile bodies according to claim 1, characterized in that, a slide rail is installed in the sliding groove, and the moving plate makes a linear reciprocating motion under the drive of a moving drive mechanism through the slide rail, so as to extrude the forgings in the dies at the four extrusion stations.

3. The multi-station die holder applicable to deep-hole forgings of projectile bodies according to claim 1, characterized in that, limit blocks are arranged on both sides in the length direction of the sliding groove, and can be driven to move linearly in the limit groove to limit the moving plate.

4. The multi-station die holder applicable to deep-hole forgings of projectile bodies according to claim 1, characterized in that, A ejector rod is provided at the bottom of each of the female dies to eject the forging after forging forming.

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