Transmission system for double-extrusion press

Abstract

The utility model discloses a transmission system for a double-extrusion press, and relates to the technical field of powder forming equipment. Comprising a stand column main shaft, a chain transmission component and a Haver flywheel drive plate separating and combining mechanism, the chain transmission component comprises a double-row small chain wheel, a first single-row large chain wheel and a second single-row large chain wheel, and the double-row small chain wheel is installed on an output shaft of a gear motor in the double-extrusion press; the first single-row large chain wheel is installed on a stand column main shaft of a first forming assembly in the double-extrusion press, the second single-row large chain wheel is installed on a stand column main shaft of a second forming assembly in the double-extrusion press, and the double-row small chain wheel is in transmission connection with the first single-row large chain wheel and the second single-row large chain wheel through chains. The Harvard flywheel drive plate opening and closing mechanism comprises a first drive plate opening and closing mechanism and a second drive plate opening and closing mechanism. According to the double-extrusion press adopting the transmission system, double extrusion of the press can be realized in the same working cycle period, the productivity is effectively improved, and the problem of large occupied area of equipment is indirectly solved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder molding equipment, and particularly relates to a transmission system for a double extrusion press. Background Art

[0002] The rapid development of manufacturing industries such as mobile phones, computers, and medical devices has driven the demand for various specifications of small and micro-sized parts containing metal powder media, such as micro-sized products like gears, bearings, nuts, and bolts. Initially, the production of these parts was achieved through multiple mechanical processing processes, such as turning, milling, planing, and grinding, which required a lot of time and cost. Later, due to the rapid development of powder metallurgy, various powder molding equipment was put on the market. The birth of powder metallurgy has greatly increased production efficiency and reduced production costs. Among them, the powder molding press is a key equipment in powder metallurgy technology, mainly used for pressing powder products, cemented carbides, magnetic materials, etc.

[0003] Nowadays, there are many types of powder presses in the domestic and foreign markets, mainly including three types of presses: mechanical presses, hydraulic presses, and rotary presses. Foreign mechanical presses, hydraulic presses, and rotary presses mainly produce large and medium-sized part presses, and currently, domestic mechanical presses are still the mainstream forming presses for producing micro-sized parts.

[0004] For many manufacturers of micro-sized parts in mass production and press equipment manufacturers, small-tonnage presses (below 5 tons) are their main equipment. Currently, small-tonnage presses in the powder metallurgy industry are also prevalent in the manufacturing industry due to the large quantity and wide range of powder metallurgy equipment, but there are still some industry difficulties:

[0005] (1) The average single-machine productivity of small-tonnage press powder metallurgy < 80 pieces / min, and the production efficiency cannot meet the industry demand. The industry demand is: 100 pieces / min < single-machine productivity < 180 pieces / min. Obviously, the existing average single-machine productivity of presses is significantly insufficient.

[0006] (2) Due to the low productivity of each small-tonnage press in powder metallurgy, for many mass production manufacturers of micro-sized parts, they can only meet the production demand by increasing the number of press sets. And there needs to be an effective spacing for manual operation between the equipment, resulting in an increase in the layout of factory buildings and equipment and a large floor area requirement.

[0007] The technological actions of the press forming equipment are as follows:

[0008] (1) The feeding device feeds the powder of the molding material in the hopper into the stamping die.

[0009] (2) The punch presses for forming. The upper punch and the lower punch move in their respective strokes to press the metal powder in the die into shape.

[0010] (3) The ejector mechanism ejects the material, and the lower punch ejects the formed part in the mold to the pushing surface under the action of the crank-slider mechanism.

[0011] (4) The pushing mechanism pushes the material. The pushing mechanism pushes the formed part into the receiving box under the rotation of the forming cam.

[0012] Compression molding is a very crucial step in powder metallurgy. It mainly includes four processes: powder loading, pressing, pressure holding, and demolding. That is, the operation of these four processes is a working cycle. Currently, the maximum forming size of a single-out (2T) powder press is Φ12×10mm, and the production rate is 20 - 80 pieces / min. That is, when producing the smallest-sized parts, due to the limitation of the minimum pressure holding time (0.25s), a complete working cycle is 0.75s / piece. When producing parts with the maximum forming size of Φ12×10mm, a complete cycle is 3s / piece. Therefore, the low production efficiency is the main problem. The essential reason is that the mechanical powder molding machine must ensure a certain pressure holding time during the forming of parts (one forming cycle), resulting in its inability to infinitely shorten the forming cycle.

[0013] As can be seen from the above, the traditional mechanical press has problems such as low production efficiency, the need for a large number of equipment, and a large floor area. It cannot increase the production efficiency by shortening the forming cycle. If the press is numerically controlled, it will lead to an increase in cost, and the improvement of efficiency is proportional to the cost, which cannot be accepted by existing enterprises in the industry. Therefore, it is urgent to improve the transmission system of the press and provide a transmission system for a double-out press. Summary of the Utility Model

[0014] The main purpose of the present utility model is to provide a transmission system for a double-out press to overcome or improve at least one technical problem of the existing technology, or to provide a useful alternative.

[0015] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0016] A transmission system for a double extrusion press, comprising a column main shaft, a chain transmission component, and a split combination mechanism for a Hafer flywheel dial, wherein the chain transmission component includes a double-row small sprocket, a first single-row large sprocket, and a second single-row large sprocket. The double-row small sprocket is installed on the output shaft of a reduction motor in the double extrusion press. The first single-row large sprocket is installed on the column main shaft of the first forming component in the double extrusion press. The second single-row large sprocket is installed on the column main shaft of the second forming component in the double extrusion press. The double-row small sprocket is respectively connected to the first single-row large sprocket and the second single-row large sprocket through chains for transmission connection. The split combination mechanism for the Hafer flywheel dial includes a first split combination mechanism and a second split combination mechanism. The first single-row large sprocket is coaxially installed with the first split combination mechanism, and the second single-row large sprocket is coaxially installed with the second split combination mechanism;

[0017] When the double extrusion press is in the working state of double extrusion, through the adjustment of the split combination mechanism for the Hafer flywheel dial, the phase difference between the upper punch of the first forming component and the upper punch of the second forming component is always maintained at 180°.

[0018] Furthermore, both the first single-row large sprocket and the second single-row large sprocket are connected with sprocket seats through screws. The part of the column main shaft of the first forming component corresponding to the first split combination mechanism is a spline shaft, and the part of the column main shaft of the second forming component corresponding to the second split combination mechanism is a spline shaft;

[0019] Both the first split combination mechanism and the second split combination mechanism include a sliding spline dial and a compression spring. One side of the sliding spline dial is close to the sprocket seat, and the other side is close to a special nut. The special nut is installed on the column main shaft. Six spring seats are evenly arranged at the end of the special nut. One end of the compression spring is installed on the spring seat, and the other end is installed in a spring hole on the sliding spline dial. The end of the sliding spline dial close to the sprocket seat is provided with a first connecting pin and a second connecting pin. The sprocket seat is provided with a first pin hole and a second pin hole. The first pin hole is matched with the first connecting pin, and the second pin hole is matched with the second connecting pin. The diameters of the first connecting pin and the second connecting pin are different. The first connecting pin is a large-diameter pin, and the second connecting pin is a small-diameter pin;

[0020] In the natural state, the sliding spline dial is combined with the sprocket seat under the elastic force of the compression spring, so as to transmit torque to the column main shaft. At this time, the state of the sliding spline dial in the first dial separating and combining mechanism is that the large-diameter pin is located at the upper part of the sliding spline dial, and the small-diameter pin is located at the lower part of the sliding spline dial. The state of the sliding spline dial in the second dial separating and combining mechanism is that the small-diameter pin is located at the upper part of the sliding spline dial, and the large-diameter pin is located at the lower part of the sliding spline dial. Thus, when in the double extrusion working state, the phase difference between the upper punch of the first forming assembly and the upper punch of the second forming assembly is always kept at 180°.

[0021] Furthermore, the jaw clutch flywheel dial separating and combining mechanism further includes a manual fork mechanism. The interior of the reduction gearbox in the double extrusion press is divided into two cavities, which respectively correspond to the positions of the first single-row large sprocket and the second single-row large sprocket. A manual fork mechanism is provided at each cavity. The sliding spline dial is slid by the manual fork mechanism, so as to overcome the spring force in the initial state of the compression spring and make the sliding spline dial and the sprocket seat reach the disconnected state.

[0022] Furthermore, the manual fork mechanism includes a clutch rod, a fork shaft, fork arms and fork rollers. Both ends of the fork shaft are connected to the inner wall of the reduction gearbox cavity through end covers. The two fork arms are arranged at the bottom of the fork shaft. The fork rollers are arranged on the inner side of the bottom of the fork arms. The clutch rod is connected to the middle part of the fork shaft through a clutch rod sleeve. The upper end of the clutch rod penetrates through the top of the reduction gearbox cavity and extends above the reduction gearbox. A support seat is provided on the side wall of the column housing. An adjusting seat is hinged to the side of the clutch rod. An adjusting screw is connected to the adjusting seat. The other end of the adjusting screw is connected to the support seat. A locking nut is installed on the adjusting screw. An annular groove is provided on the sliding spline dial, and the fork roller is located in the annular groove.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] By adopting the transmission system of the utility model, the single power source of the double extrusion press can be output to the double working stations, and the double extrusion of the press can be realized in the same working cycle. The single and double pressing modes of the powder molding machine can also be controlled. Through the double extrusion design, with the phase difference working of the upper and lower double punches, the layout space can be effectively saved at an appropriate control cost, indirectly solving the problem of the floor area of the equipment. For the same output, the number of press equipment sets is reduced, and the production efficiency is improved and the equipment cost is saved. Description of the Drawings

[0025] Figure 1 It is the front view of the overall structure of the double extrusion press of the utility model.

[0026] Figure 2 This is a side view of the overall structure of the double extrusion press of the present utility model.

[0027] Figure 3 This is a schematic diagram of the working principle of the double extrusion press of the present utility model.

[0028] Figure 4 This is a front cross-sectional view of the double extrusion press of the present utility model.

[0029] Figure 5 This is a side cross-sectional view of the double extrusion press of the present utility model.

[0030] Figure 6 This is a top cross-sectional view of the double extrusion press of the present utility model.

[0031] Figure 7 This is a schematic diagram of the structure at the reduction motor of the present utility model.

[0032] Figure 8 This is a schematic diagram of the structure of the forming assembly of the present utility model.

[0033] Figure 9 This is a schematic diagram of the structure of the first dial separating and combining mechanism of the present utility model.

[0034] Figure 10 This is a schematic diagram of the structure of the second dial separating and combining mechanism of the present utility model.

[0035] Figure 11 This is the Figure 4 upper structure schematic diagram of the present utility model.

[0036] Figure 12 This is the Figure 4 lower structure schematic diagram of the present utility model.

[0037] Figure 13 This is the Figure 5 upper structure schematic diagram of the present utility model.

[0038] Figure 14 This is the Figure 5 lower structure schematic diagram of the present utility model.

[0039] Figure 15 This is a schematic diagram of the working principle of the existing single press.

[0040] Among them, 1 - feeding component, 2 - electric box component, 3 - column component, 31 - column outer housing, 32 - first forming assembly, 33 - second forming assembly, 34 - upper punch, 35 - lower punch, 36 - cam mechanism, 37 - eccentric hinge mechanism, 38 - bevel gear pair, 39 - column main shaft, 310 - main shaft mounting seat, 4 - base, 41 - reduction motor, 5 - material pushing component, 52 - mold discharging location, 6 - gearbox shifting component, 7 - chain drive component, 71 - double-row small sprocket, 72 - first single-row large sprocket, 73 - second single-row large sprocket, 74 - chain, 75 - sprocket seat, 8 - jaw clutch flywheel dial separating and combining mechanism, 81 - sliding spline dial, 82 - compression spring, 83 - special nut, 84 - spring seat, 85 - large-diameter pin, 86 - small-diameter pin, 87 - annular groove, 9 - manual fork mechanism, 91 - clutch lever, 92 - fork shaft, 93 - fork arm, 94 - fork roller, 95 - support seat, 96 - adjustment seat, 97 - adjustment screw. Specific implementation mode

[0041] The technical solution of the present utility model will be further described below with reference to the drawings and embodiments.

[0042] Combined with Figures 1 to 14 , this embodiment provides a transmission system for a double extrusion press, including a column main shaft 39, a chain drive component 7, and a jaw clutch flywheel dial separating and combining mechanism 8; it belongs to a part of the double extrusion press. For the convenience of understanding, this embodiment also introduces the double extrusion press.

[0043] The double extrusion press includes a base 4, a column component 3, a chain drive component 7, a gearbox shifting component 6, a feeding component 1, and a material pushing component 5. The column component 3 and the gearbox shifting component 6 are arranged on the base 4. A reduction motor 41 is installed at the bottom of the inner bed of the base 4. Both the feeding component 1 and the material pushing component 5 are arranged at the top of the column component 3. The feeding component 1 is used to fill raw material powder into the mold storage location 52, and the material pushing component 5 is used to push the molded blank after demolding into a storage box;

[0044] The column component 3 includes a column housing 31, a first forming assembly 32 and a second forming assembly 33 disposed inside the column housing 31. Both the first forming assembly 32 and the second forming assembly 33 include an upper punch 34, a lower punch 35, an eccentric hinge mechanism 37, a cam mechanism 36, and a split and combined mechanism 8 of a hafnium flywheel dial. The output end of the reduction motor 41 is respectively connected to the column main shafts 39 of the first forming assembly 32 and the second forming assembly 33 through the chain transmission component 7. The eccentric hinge mechanism 37 and the cam mechanism 36 are both connected to the column main shaft 39. The eccentric hinge mechanism 37 is in transmission connection with the upper punch 34, and the eccentric hinge mechanism 37 is used to drive the upper punch 34 to perform reciprocating linear motion to complete stamping forming. The cam mechanism 36 is in transmission connection with the lower punch 35, and the cam mechanism 36 is used to drive the lower punch 35 to perform reciprocating linear motion to complete ejecting and demolding;

[0045] In the working state of double extrusion, through the adjustment of the split and combined mechanism 8 of the hafnium flywheel dial, the phase difference between the upper punch 34 of the first forming assembly 32 and the upper punch 34 of the second forming assembly 33 is always kept at 180°.

[0046] As Figure 15 shown, the working principle of the existing single press is as follows: the main shaft motor rotates, thereby driving the eccentric mechanism and the cam mechanism to move. The eccentric mechanism drives the upper punch to perform reciprocating linear motion to complete stamping forming, and the cam mechanism drives the lower punch to perform reciprocating linear motion to complete ejecting and demolding.

[0047] For the first forming assembly 32 and the second forming assembly 33 of this embodiment, the upper punch 34, the lower punch 35, the eccentric hinge mechanism 37, and the cam mechanism 36 all belong to the prior art and have the same working principle as that of the single press. Therefore, their specific structures will not be described in detail. The focus of this embodiment is the split and combined mechanism 8 of the hafnium flywheel dial, and it will be described in detail.

[0048] In this embodiment, an electric box component 2 is further provided on the base 4.

[0049] In this embodiment, the chain transmission component 7 includes a double-row small sprocket 71, a first single-row large sprocket 72, and a second single-row large sprocket 73. The double-row small sprocket 71 is installed on the output shaft of the reduction motor 41. The first single-row large sprocket 72 is installed on the column main shaft 39 of the first forming assembly 32. The second single-row large sprocket 73 is installed on the column main shaft 39 of the second forming assembly 33. The double-row small sprocket 71 is respectively in transmission connection with the first single-row large sprocket 72 and the second single-row large sprocket 73 through a chain 74.

[0050] Preferably, a U-shaped groove is provided at the position where the reduction motor 41 is installed at the bottom of the inner bed of the base. The reduction motor 41 is installed in the U-shaped groove by screws. During use, the vertical position of the motor can be slightly adjusted by tightening and loosening the screws on the U-shaped groove, so as to tension and loosen the chain.

[0051] In this embodiment, the split and combined mechanism 8 of the hafnium flywheel dial of the first forming assembly 32 is the first dial split and combined mechanism, and the split and combined mechanism 8 of the hafnium flywheel dial of the second forming assembly 33 is the second dial split and combined mechanism. The first single-row large sprocket 72 is coaxially installed with the first dial split and combined mechanism, and the second single-row large sprocket 73 is coaxially installed with the second dial split and combined mechanism.

[0052] In this embodiment, both the first single-row large sprocket 72 and the second single-row large sprocket 73 are connected with a sprocket seat 75 by screws. The part of the column main shaft 39 of the first forming assembly 32 corresponding to the first dial split and combined mechanism is a spline shaft, and the part of the column main shaft 39 of the second forming assembly 33 corresponding to the second dial split and combined mechanism is a spline shaft;

[0053] Both the first dial split and combined mechanism and the second dial split and combined mechanism include a sliding spline dial 81 and a compression spring 82. One side of the sliding spline dial 81 is close to the sprocket seat 75, and the other side is close to a special nut 83. The special nut 83 is installed on the column main shaft 39. Six spring seats 84 are evenly distributed at the end of the special nut 83. One end of the compression spring 82 is installed on the spring seat 84, and the other end is installed in the spring hole on the sliding spline dial 81. The end of the sliding spline dial 81 close to the sprocket seat 75 is provided with a first connecting pin and a second connecting pin. The sprocket seat 75 is provided with a first pin hole and a second pin hole. The first pin hole is matched with the first connecting pin, and the second pin hole is matched with the second connecting pin. The diameters of the first connecting pin and the second connecting pin are different. The first connecting pin is a large-diameter pin 85, and the second connecting pin is a small-diameter pin 86;

[0054] In the natural state, the sliding spline dial 81 is combined with the sprocket seat 75 under the elastic force of the compression spring 82, so as to transmit torque to the column main shaft 39. At this time, the state of the sliding spline dial 81 in the first dial split and combined mechanism is that the large-diameter pin 85 is located at the upper part of the sliding spline dial 81, and the small-diameter pin 86 is located at the lower part of the sliding spline dial 81. The state of the sliding spline dial 81 in the second dial split and combined mechanism is that the small-diameter pin 86 is located at the upper part of the sliding spline dial 81, and the large-diameter pin 85 is located at the lower part of the sliding spline dial 81. Thus, in the double extrusion working state, the phase difference between the upper punch 34 of the first forming assembly 32 and the upper punch 34 of the second forming assembly 33 is always kept at 180°.

[0055] It should be noted that the sprocket seat 75 is connected to the column main shaft 39 through bearings. Therefore, when the reduction motor transmits power to the first single-row large sprocket 72 and the second single-row large sprocket 73 through a chain, the column main shaft 39 does not rotate. Only when the sliding spline dial 81 is combined with the sprocket seat 75 under the elastic force of the compression spring 82, the first single-row large sprocket 72 or the second single-row large sprocket 73 drives the sprocket seat 75 to rotate, and the sprocket seat 75 drives the sliding spline dial 81 to rotate. Since the spline shaft section of the sliding spline dial 81 is connected to the column main shaft 39 through splines, when the sliding spline dial 81 rotates, it will drive the column main shaft 39 to rotate.

[0056] In this embodiment, the gear shifting and reduction box component 6 includes a reduction box. The reduction box is arranged on the top of the base 4 and on one side of the column housing 31. The interior of the reduction box is divided into two cavities, which correspond to the positions of the first single-row large sprocket 72 and the second single-row large sprocket 73 respectively. A manual shift fork mechanism 9 is provided at each cavity. By the manual shift fork mechanism 9, the sliding spline dial 81 is slid, so as to overcome the spring force in the initial state of the compression spring 82, and make the sliding spline dial 81 and the sprocket seat 75 reach a disconnected state.

[0057] Preferably, the manual shift fork mechanism 9 includes a clutch rod 91, a shift fork shaft 92, shift fork arms 93 and shift fork rollers 94. Both ends of the shift fork shaft 92 are connected to the inner wall of the reduction box cavity through end covers. The two shift fork arms 93 are arranged at the bottom of the shift fork shaft 92. The shift fork rollers 94 are arranged on the inner side of the bottom of the shift fork arms 93. The clutch rod 91 is connected to the middle part of the shift fork shaft 92 through a clutch rod sleeve. The upper end of the clutch rod 91 penetrates through the top of the reduction box cavity and extends above the reduction box. A support seat 95 is provided on the side wall of the column housing 31. An adjustment seat 96 is hinged to the side of the clutch rod 91. An adjustment screw 97 is connected to the adjustment seat 96. The other end of the adjustment screw 97 is connected to the support seat 95. A locking nut is installed on the adjustment screw 97. An annular groove 87 is provided on the sliding spline dial 81. The shift fork roller 94 is located in the annular groove 87.

[0058] Specifically, after the sliding spline dial 81 is provided with the annular groove 87, the diameter of the sliding spline dial 81 at the position of the annular groove 87 is small, and the diameters on both sides are large. The shift fork roller 94 is in the annular groove but does not contact the outer wall of the small-diameter section of the sliding spline dial 81. Therefore, it will not affect the rotation of the sliding spline dial 81. When it is necessary to push the sliding spline dial 81, the shift fork roller 94 contacts the two side walls of the annular groove 87, so as to apply a thrust to the sliding spline dial 81 and make it slide.

[0059] It should be noted that by separately adjusting the manual fork mechanism 9 that cooperates with the first dial separating and combining mechanism and the second dial separating and combining mechanism, the first forming assembly 32 and the second forming assembly 33 can work independently. That is, the forming machine of this embodiment has three working modes: the first forming assembly 32 works independently, the second forming assembly 33 works independently, and the first forming assembly 32 and the second forming assembly 33 work simultaneously.

[0060] In this embodiment, a main shaft mounting seat 310 is provided on the inner bottom wall of the column housing 31, and the column main shaft 39 is mounted on the main shaft mounting seat 310 through bearings.

[0061] By adopting the above technical solution of this embodiment, the power output is divided into two by a power source (reduction motor) and the chain transmission component 7 and the Hough flywheel dial separating and combining mechanism 8; the manual fork mechanism 9 is used in cooperation with the Hough flywheel dial separating and combining mechanism 8 to achieve three working modes; through the cooperation of the large-diameter pin 85 and the small-diameter pin 86 on the sliding spline dial 81 with the first pin hole and the second pin hole on the sprocket seat 75, the state of the sliding spline dial 81 in the first dial separating and combining mechanism is that the large-diameter pin 85 is located at the upper part of the sliding spline dial 81, and the small-diameter pin 86 is located at the lower part of the sliding spline dial 81. The state of the sliding spline dial 81 in the second dial separating and combining mechanism is that the small-diameter pin 86 is located at the upper part of the sliding spline dial 81, and the large-diameter pin 85 is located at the lower part of the sliding spline dial 81. Thus, in the double extrusion working state, the phase difference between the upper punch 34 of the first forming assembly 32 and the upper punch 34 of the second forming assembly 33 is always 180°, realizing the phase difference working of the two punches, one up and one down.

[0062] The forming machine of the present invention realizes the power transmission from a single power source output to a double-station through an optimized design of the transmission structure, achieving the effect of double extrusion; during double extrusion, the upper punches of the first forming assembly and the upper punch 34 of the second forming assembly 33 always maintain a high-efficiency alternating operation state of one up and one down for the left and right upper punches (i.e., ensuring the phase). One working cycle realizes 2 stamping formations. Theoretically, the productivity of the single-extrusion press is increased by 2 times; under the same productivity and conditions, the manufacturing cost is only 85% of that of the existing single-extrusion press products, having a certain competitiveness; under the same productivity and output, the floor area required for the installation of the double-extrusion press is reduced to less than one-half of that of the existing press equipment.

[0063] The above is only a preferred embodiment of the present invention, and it does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention still belong to the scope of the technical solution of the present invention.

Claims

1. A transmission system for a double-extrusion press, characterized in that: It includes a column spindle, a chain transmission component and a Haval flywheel dial separation and combination mechanism, the chain transmission component includes a double-row small sprocket, a first single-row large sprocket and a second single-row large sprocket, the double-row small sprocket is installed on the output shaft of the reduction motor in the double extrusion press, the first single-row large sprocket is installed on the column spindle of the first molding assembly in the double extrusion press, the second single-row large sprocket is installed on the column spindle of the second molding assembly in the double extrusion press, the double-row small sprocket is respectively connected to the first single-row large sprocket and the second single-row large sprocket through a chain, the Haval flywheel dial separation and combination mechanism includes a first dial separation and combination mechanism and a second dial separation and combination mechanism, the first single-row large sprocket is coaxially installed with the first dial separation and combination mechanism, and the second single-row large sprocket is coaxially installed with the second dial separation and combination mechanism; When the double extrusion press is in the double extrusion working state, the phase difference between the upper punch of the first molding assembly and the upper punch of the second molding assembly is always maintained at 180° through the adjustment of the Haver flywheel dial separation and combination mechanism.

2. A transmission system for a double extrusion press according to claim 1, characterized in that: The first single-row large sprocket and the second single-row large sprocket are both connected to a sprocket seat by screws, the column main shaft of the first forming component corresponding to the first dial separation and combination mechanism is a spline shaft, and the column main shaft of the second forming component corresponding to the second dial separation and combination mechanism is a spline shaft; The first dial separation and combination mechanism and the second dial separation and combination mechanism both include a sliding spline dial and a compression spring, one side of the sliding spline dial is close to the sprocket seat, and the other side is close to a special nut, the special nut is installed on the column main shaft, and six spring seats are evenly distributed on the end of the special nut, one end of the compression spring is installed on the spring seat, and the other end is installed in the spring hole on the sliding spline dial, the end of the sliding spline dial close to the sprocket seat is provided with a first connecting pin and a second connecting pin, the sprocket seat is provided with a first pin hole and a second pin hole, the first pin hole cooperates with the first connecting pin, and the second pin hole cooperates with the second connecting pin, the first connecting pin and the second connecting pin have different diameters, the first connecting pin is a large diameter pin, and the second connecting pin is a small diameter pin; In the natural state, the sliding spline dial is combined with the sprocket seat by the elastic force of the compression spring, thereby transmitting torque to the column main shaft. At this time, the state of the sliding spline dial in the first dial separation and combination mechanism is: the large diameter pin is located at the upper part of the sliding spline dial, and the small diameter pin is located at the lower part of the sliding spline dial. The state of the sliding spline dial in the second dial separation and combination mechanism is: the small diameter pin is located at the upper part of the sliding spline dial, and the large diameter pin is located at the lower part of the sliding spline dial, so that in the double extrusion working state, the phase difference between the upper punch of the first molding component and the upper punch of the second molding component is always maintained at 180°.

3. A transmission system for a double extrusion press as claimed in claim 2, characterized in that: The Haval flywheel dial separation and combination mechanism also includes a manual fork mechanism. The interior of the reduction gearbox in the double extrusion press is divided into two cavities, which correspond to the positions of the first single-row large sprocket and the second single-row large sprocket respectively. A manual fork mechanism is provided in each of the cavities. The sliding spline dial is slid by the manual fork mechanism, thereby overcoming the spring force of the compression spring in the initial state, so that the sliding spline dial and the sprocket seat reach a disconnected state.

4. A transmission system for a double-extrusion press as claimed in claim 3, characterized in that: The manual shift fork mechanism comprises a clutch rod, a shift fork shaft, a shift fork arm and a shift fork roller, the two ends of the shift fork shaft are connected to the inner wall of the cavity of the reduction gear box through end covers, the two shift fork arms are arranged at the bottom of the shift fork shaft, the shift fork roller is arranged on the inner side of the bottom of the shift fork arm, the clutch rod is connected to the middle part of the shift fork shaft through a clutch rod sleeve, the upper end of the clutch rod passes through the top of the reduction gear box cavity and extends to the top of the reduction gear box, a support seat is provided on the side wall of the column outer shell, the side of the clutch rod is hinged with an adjustment seat, the adjustment seat is connected to an adjustment screw, the other end of the adjustment screw is connected to the support seat, and a locking nut is installed on the adjustment screw; an annular groove is provided on the sliding spline dial, and the shift fork roller is located in the annular groove.

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