Cold extrusion multi-station horizontal hydraulic press

Abstract

This utility model discloses a multi-station horizontal hydraulic press for cold extrusion. The upper and lower columns of the machine body are connected at both ends by a crossbeam. A worktable is located inside the crossbeam at one end of the machine body, and a slider is located inside the crossbeam at the other end. The slider and the worktable share the same horizontal axis. A feeding beam, running through the slider's front and rear directions, is located in the middle of the slider's internal height direction. Feeding cylinders are symmetrically fixed on the front and rear sides of the slider, with the piston rods of the two feeding cylinders connected to the ends of the feeding beam. Guide devices are symmetrically located near both ends of the feeding beam. Multiple forming stations are located in the slider's width direction. Each forming station is equipped with a feeding rod copper sleeve, and a feeding rod is inserted into each sleeve. The inner ends of each feeding rod are screwed into corresponding screw holes in the feeding cylinders, achieving synchronous feeding at each station. This equipment realizes multi-station continuous forming and synchronous demolding of cold-extruded stepped shafts, with low investment, small footprint, and high efficiency.

Description

Technical Field

[0001] This utility model relates to a hydraulic press, and more particularly to a cold extrusion multi-station horizontal hydraulic press, belonging to the field of hydraulic machine tool technology. Background Technology

[0002] In the field of cold extrusion processing, stepped shaft parts such as automotive half shafts, motor shafts, and splined shafts, due to their complex shapes including multi-stage shaft diameters, shoulders, and end splines, require 3 to 5 hydraulic presses of different tonnages or structures for traditional production. These presses must be completed on separate equipment in the sequence of "material blanking → extrusion → pre-forming → final forming → shaping." Each station requires separate processing on independent equipment, which not only significantly increases equipment investment costs but also results in substantial non-productive time due to the multiple clamping, handling, and die-setting of parts between different machines. The overall equipment utilization rate is generally less than 55%.

[0003] During pressure processing on a single hydraulic press, the workpiece is prone to adhesion or jamming within the die due to the intense flow of cold-extruded metal and the high surface finish of the mold cavity. This is especially true for horizontal hydraulic presses, where the workpiece cannot detach under its own weight during the slide return stroke. On-site methods typically involve manual tapping, prying, or pre-applying a release agent to the mold surface to assist in demolding. Manual intervention is not only labor-intensive but also easily damages the formed workpiece and mold, hindering continuous operation and reducing efficiency. Applying release agents also pollutes the working environment and is ineffective.

[0004] To reduce manual intervention, the traditional solution is to add a central ejector cylinder inside the slide block. During the slide block's return stroke, the central ejector cylinder ejects the workpiece adsorbed in the mold. The central ejector cylinder is often located inside the hydraulic press slide block, or a countersunk hole is machined inside the main cylinder piston rod to install the ejector cylinder, or a small-tonnage ejector cylinder is directly designed at the end of the main cylinder piston rod. However, installing the ejector cylinder inside the slide block or piston rod has several drawbacks: 1. Difficult pipeline connection: The ejector cylinder's oil port is located deep inside the slide block, and the box-shaped structure has a narrow space, making it impossible to insert a standard wrench. The tightening torque of the joint is difficult to guarantee, and leakage is prone to occur after long-term vibration.

[0005] 2. Multi-station synchronization challenge: A cold extrusion stepped shaft production line often contains more than 3 forming stations, each of which needs to feed material independently. If multiple feeding cylinders are all stuffed into the slide block, it will inevitably weaken the rigidity of the slide block, resulting in increased deflection, decreased guiding accuracy, and affecting the mold life.

[0006] 3. Complex synchronous control: If multiple feeding cylinders share the same oil source, the ejection action cannot be synchronized due to the machining error and the difference in sealing friction of each cylinder, causing the workpiece to tilt and jam. If independent oil source servo control is used, multiple sets of proportional valves, sensors and controllers need to be added, which significantly increases the complexity and cost of the hydraulic system.

[0007] In summary, existing technologies still have significant shortcomings in multi-station continuous production of cold extruded stepped shafts, reliable demolding, and simplified slider structure. There is an urgent need for a new technology solution that can integrate multiple stations, synchronous material feeding, and has a compact structure and convenient maintenance on a single hydraulic press. Utility Model Content

[0008] The purpose of this utility model is to provide a multi-station horizontal hydraulic press for cold extrusion, which realizes "multi-station continuous forming + synchronous demolding" of cold extruded stepped shafts on a single machine. This solves a series of pain points in the existing technology, such as multiple machines, large footprint, difficult demolding, weak structure, low efficiency, and difficult maintenance, and provides a brand-new solution for automated, precise, and green production of cold extrusion.

[0009] To solve the above technical problems, this utility model provides a cold extrusion multi-station horizontal hydraulic press, including a machine body. The machine body has an upper column and a lower column that are parallel to each other. The two ends of the upper column and the lower column are connected by a crossbeam. A worktable is provided on the inner side of the crossbeam at one end of the machine body, and a slider is provided on the inner side of the crossbeam at the other end. The slider and the worktable share the same horizontal axis. A feeding beam is provided in the middle of the slider in the height direction, running through the slider in the front and rear directions. Feeding cylinders are symmetrically fixed on the front and rear sides of the slider. The piston rod ends of the two feeding cylinders are respectively connected to the ends of the feeding beam. Guide devices are symmetrically provided near the two ends of the feeding beam. Multiple forming stations are provided in the width direction of the slider. Each forming station is equipped with a feeding rod copper sleeve. Feeding rods are inserted into each feeding rod copper sleeve. The inner ends of each feeding rod are screwed into the corresponding screw holes of the feeding beam.

[0010] Furthermore, the working surface of the slider is provided with ejector rod mounting holes corresponding to each forming station. Each ejector rod mounting hole is fitted with an ejector rod copper sleeve. The outer flange of each ejector rod copper sleeve is fixed in the outer step of the ejector rod mounting hole by screws. The outer end of each ejector rod is inserted into the corresponding ejector rod copper sleeve. The inner end screw section of each ejector rod is screwed into the corresponding screw hole of the ejector beam. The outer circumference of each ejector rod is provided with a square tenon cutting surface for tightening and fixing the ejector rod to the screw hole of the ejector beam. The thread of the inner end of the ejector rod is provided with a stepped surface, and the stepped surface abuts against the ejector beam.

[0011] Furthermore, the cylinder body of the feeding cylinder has a square structure, and feeding cylinder support plates with grooves are welded to the two side walls of the slider. The inner side of the square cylinder body is embedded in the groove and fixed with screws, and the tail of the cylinder body abuts against the stepped surface of the groove.

[0012] Furthermore, the guiding device includes a feeding beam guide sleeve installed in the feeding beam and a guide rod inserted into the feeding beam guide sleeve, the two ends of which are fixed to the slider and parallel to the slider axis.

[0013] Furthermore, the bottom of the front and rear ends of the worktable is provided with worktable adjustment seats. The bottom of the worktable adjustment seats is fixed on the lower column, and the top of the worktable adjustment seats is screwed with worktable adjustment screws. The top of the worktable adjustment screws abuts against the bottom of the worktable. Multiple fixed mold adjustment seats are fixed at the lower part of the working end face of the worktable. Each fixed mold adjustment seat is located below each forming station, and each fixed mold adjustment seat is screwed with a push-pull screw for adjusting the height of the fixed mold.

[0014] Furthermore, a plurality of moving mold adjustment seats are fixed at the lower part of the working end face of the slider. Each moving mold adjustment seat is located below each forming station, and each moving mold adjustment seat is screwed with a push-pull screw for adjusting the height of the moving mold.

[0015] Furthermore, the lower ends of the front and rear sides of the slider are respectively connected to outwardly extending slider supports. Each slider support is screwed with a roller adjusting screw at its top. The lower end of each roller adjusting screw is connected to a roller bracket that can move up and down along the slider support. The lower end of the roller bracket extends out of the slider support and is equipped with a roller. Each roller is supported on the top of the panel and moves. The panel is fixed to the top of the stop. The bottom of the stop is embedded in the corresponding groove of the lower column and extends in the left and right direction.

[0016] Furthermore, the inner side of the stop is provided with a body guide rail, the bottom of which is fixed to the lower column. The outer wall of the body guide rail is connected to the stop by studs, making the body guide rail and the stop parallel to each other. Copper guide plates are fixed to the top and inner wall of the body guide rail. The corner of the slider is provided with a notched step, and a wedge is provided below the notched step. A slider guide rail is provided below the wedge, and the lower inclined surface of the wedge abuts against the upper inclined surface of the slider guide rail. The wedge is connected to the slider by a wedge adjusting screw extending in the front-back direction. The slider guide rail is also connected to the side wall of the slider by screws. The bottom of the slider guide rail is supported on the copper guide plate at the top of the body guide rail. The outer wall of the corner of the slider cooperates with the copper guide plate on the inner wall of the body guide rail to precisely guide the slider in the front-back direction.

[0017] Furthermore, the slider is driven by two symmetrically arranged piston cylinders and a plunger cylinder located in the middle. The plunger cylinder is used for rapid advance during idle stroke, and the piston cylinder is used for pressurization and return stroke. Ejector cylinders are provided on the outer side of the worktable corresponding to each station to eject the workpiece in the fixed mold. The piston cylinder and plunger cylinder are supplied with oil by the main cylinder pump station, and the ejector cylinder is supplied with oil independently by the ejector cylinder pump station. The two pump stations are linked through the control system.

[0018] Compared with the existing technology, the present invention has achieved the following beneficial effects: 1. Single machine multi-station continuous forming, reducing both equipment investment and site occupation: Five stations are integrated at one time in the width direction of a horizontal hydraulic press, which can complete all processes of "extrusion - pre-forming - final forming - shaping" of stepped shaft. Compared with the traditional "3 to 5 single machines in series" scheme, it reduces equipment investment, shortens the production line length and reduces site occupation, and significantly improves the utilization rate of the factory.

[0019] 2. External dual-cylinder synchronous feeding completely eliminates manual demolding: The feeding cylinders are moved to both sides of the outside of the slider, and the five feeding rods are pushed out synchronously through the rigid T-shaped feeding beam. The demolding of all stations is completed instantly during the return stroke; eliminating the need for hammering, pry bars and release agents, the damage rate of molds / workpieces is reduced by 90%, the working environment is clean, and 24-hour unmanned continuous production can be achieved, with the overall line cycle time increased to 6-8 pieces / min.

[0020] 3. Zero weakening of slider structure, double improvement of rigidity and guiding accuracy: The feeding system is completely external, and the slider maintains a complete box-shaped structure; in conjunction with the roller-panel weight balance system and the wedge-sloping guide rail adjustment mechanism, the slider deflection is ≤0.02mm / m, the guide clearance can be accurate to 0.01mm, the mold life is increased by more than 30%, and the product coaxiality is stable within 0.05mm.

[0021] 4. Open maintenance space, greatly increasing the efficiency of pipeline connection and maintenance: All hydraulic joints and lubrication points are exposed on both sides of the slider, and the wrench can directly reach the fastening parts; replacing the seal or repairing the feeding cylinder does not require disassembling the slider, reducing maintenance time from 4 hours to 0.5 hours, and increasing the monthly effective working time of the equipment by 15%.

[0022] 5. Independent control of dual pump stations for optimized cycle time: The main cylinder pump station and the ejector cylinder pump station are separated, and the slide return and ejection are synchronized, reducing the waiting time per cycle by 1.2 to 1.5 seconds; the ejection pressure and speed of each station can be set independently, which is compatible with the process requirements of different materials and different cross-section stepped shafts, and significantly improves process flexibility.

[0023] 6. Modular adjustment significantly reduces changeover time: The worktable is equipped with a fixed mold adjustment seat, and the slider is equipped with a moving mold adjustment seat. The mold height can be precisely adjusted by pushing and pulling screws. With the quick-change ejector rod copper sleeve, the mold installation and debugging time when changing product specifications is reduced from 2 hours to 20 minutes, resulting in outstanding economic benefits for small-batch, multi-variety production. Attached Figure Description

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The drawings are provided for reference and illustration only and are not intended to limit the present invention.

[0025] Figure 1 This is a front view of the cold extrusion multi-station horizontal hydraulic press of this utility model; Figure 2 for Figure 1 The left view; Figure 3 This is a right view of the slider part in this utility model; Figure 4 This is an enlarged view of the slider support part in this utility model; Figure 5 This is a front view of the slider part in this utility model; Figure 6 for Figure 5 Sectional view along the middle AA; Reference numerals: 1. Fuselage; 1a. Upper column; 1b. Crossbeam; 1c. Lower column; 2. Worktable; 2a. Worktable adjustment seat; 2b. Fixed mold adjustment seat; 3. Slider; 3a. Wedge; 3b. Slider guide rail; 3c. Slider support; 3d. Roller adjusting screw; 3e. Roller bracket; 3f. Roller; 3g. Feed cylinder support plate; 3h. Feed rod copper sleeve; 3j. Moving mold adjusting seat; 4. Feeding beam; 4a. Feeding beam guide sleeve; 4b. Guide rod; 5. Feeding cylinder; 6. Feeding rod; 6a. Feeding rod at the first station; 6b. Feeding rod at the second station; 6c. Feeding rod at the third station; 6d. Feeding rod at the fourth station; 6e. Feeding rod at the fifth station; 7. Fuselage guide rail; 7a. Copper guide plate; 8. Stop; 8a. Panel; 9. Ejecting the cylinder; 9a. Ejecting the cylinder at the first station; 9b. Ejecting the cylinder at the second station; 9c. Ejecting the cylinder at the third station; 9d. Ejecting the cylinder at the fourth station; 9e. Ejecting the cylinder at the fifth station; 10. Piston cylinder; 11. Plunger cylinder; 12. Master cylinder pump station; 13. Ejector cylinder pump station; 14. Guardrail; 15. Ladder. Detailed Implementation

[0026] In the following description of this utility model, the terms "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0029] like Figures 1 to 6 As shown, the cold extrusion multi-station horizontal hydraulic press of this utility model includes a machine body 1, which is an integral frame horizontal structure with good rigidity and high guiding accuracy. The machine body 1 is provided with an upper column 1a and a lower column 1c that are parallel to each other. The two ends of the upper column 1a and the lower column 1c are connected by a crossbeam 1b. The worktable 2 is located inside the crossbeam 1b at one end, and the slider 3 is located inside the crossbeam 1b at the other end. The slider 3 and the worktable 2 share a horizontal axis.

[0030] The bottom of the front and rear ends of the worktable 2 is provided with a worktable adjustment seat 2a. The bottom of the worktable adjustment seat 2a is fixed on the lower column 1c. The worktable adjustment seat 2a is U-shaped or L-shaped. The top of the worktable adjustment seat 2a is screwed with a worktable adjustment screw. The upper ends of the two worktable adjustment screws abut against the bottom of the worktable 2. The height of the worktable 2 can be precisely adjusted by the worktable adjustment screws, and the height in the front and rear directions remains consistent.

[0031] Multiple mold adjustment seats 2b are fixed at the lower part of the working end face of the worktable 2. Each mold adjustment seat 2b is located below each station, and each mold adjustment seat 2b is screwed with a push-pull screw for adjusting the height of the mold.

[0032] Multiple moving mold adjustment seats 3j are fixed at the lower part of the working end face of the slider 3. Each moving mold adjustment seat 3j is located below each station. Each moving mold adjustment seat 3j is screwed with a push-pull screw for adjusting the height of the moving mold. The center line of each moving mold is precisely adjusted to the same horizontal plane by the push-pull screw.

[0033] Three hydraulic cylinders drive the movement of the slider 3. Two piston cylinders 10 of the same tonnage are located on either side, responsible for pressurizing and returning the slider 3. A smaller piston cylinder 11 in the middle is responsible for the rapid forward movement of the slider 3. Because this hydraulic press has a horizontal structure, the slider 3 moves horizontally and cannot achieve rapid idle movement like a conventional hydraulic press relying on the slider's own weight. Therefore, it must be driven by external hydraulic cylinders. Since the piston cylinder 11 driving the slider 3 is relatively small, it only needs to overcome the frictional resistance of the moving parts, thus achieving a faster movement speed and improving work efficiency. The two piston cylinders 10 are symmetrically installed on the front and rear sides, which can reduce the tilting of the slider 3 caused by the uneven load generated by multiple workstations, resulting in higher guiding accuracy.

[0034] The lower ends of the front and rear sides of the slider 3 are respectively connected to outwardly extending slider supports 3c. The top of each slider support 3c is screwed with a roller adjusting screw 3d. The lower end of each roller adjusting screw 3d is connected to a roller bracket 3e that can move up and down along the slider support 3c. The lower end of the roller bracket 3e extends out of the slider support 3c and is equipped with a roller 3f. The rollers 3f are located on the outer sides of the four corners of the slider 3, and each roller 3f is supported on the top of the panel 8a and moves along it. The panels 8a are respectively fixed to the top of the stop 8. The bottom of the stop 8 is respectively embedded in the corresponding groove of the lower column 1c and extends in the left and right direction.

[0035] The horizontally mounted slider 3 of the horizontal hydraulic press is difficult to adjust due to its downward weight and the difficulty in adjusting the gap between the upper and lower guide surfaces of the slider guide rail 3b. The slider 3 weighs several tons, making it difficult to control the adjustment amount using external forces such as a crane. This device allows for precise adjustment of the height of the roller 3f by adjusting the roller adjusting screw 3d above the roller bracket 3e, thereby adjusting the vertical position of the slider 3 and thus the vertical gap.

[0036] During the movement of slider 3, roller 3f rolls on the plate 8a, reducing frictional resistance. Roller 3f also balances the weight of slider 3, mitigating the rapid wear of the lower copper guide plate 7a caused by the weight of slider 3 and the mold pressing down on the slider guide rail 3b. Plate 8a is installed on top of stop 8. Because stop 8 has large countersunk holes for mounting screws, creating multiple pits, roller 3f would bounce and become unstable when moving through these holes. The installation of plate 8a eliminates this unevenness.

[0037] A body guide rail 7 is provided on the inner side of the stop 8. The bottom of the body guide rail 7 is fixed to the lower column 1c. The outer wall of the body guide rail 7 is connected to the stop 8 by studs to ensure that the body guide rail 7 and the stop 8 are parallel to each other. Copper guide plates 7a are fixed to the top and inner wall of the body guide rail 7 respectively. The corner of the slider 3 is provided with a notched step. A wedge 3a is provided below the notched step. A slider guide rail 3b is provided below the wedge 3a. The lower inclined surface of the wedge 3a abuts against the upper inclined surface of the slider guide rail 3b. The wedge 3a is connected to the slider 3 by a wedge adjusting screw extending in the front-back direction. The slider guide rail 3b is also connected to the side wall of the slider 3 by a screw. Rotating the wedge adjusting screw causes the wedge 3a to move along the inclined surface of the slider guide rail 3b, thereby accurately adjusting the height of the slider guide rail 3b. The bottom of the slider guide rail 3b is supported on the copper guide plate 7a at the top of the body guide rail 7 to ensure the accuracy of the height direction of the slider 3. The outer corner of the slider 3 is matched with the copper guide plate 7a on the inner side wall of the body guide rail 7 to precisely guide the slider 3 in the front and back direction.

[0038] A feeding beam 4 is provided in the middle of the height direction inside the slider 3. The feeding beam 4 runs through the front and rear direction of the slider 3. The feeding beam 4 has a T-shaped structure to improve rigidity. The front and rear ends of the feeding beam 4 are fixedly connected to the piston rod ends of the corresponding feeding cylinder 5 by screws.

[0039] The slider 3 has feeding cylinder support plates 3g welded to its two side walls, and the outer walls of the feeding cylinder support plates 3g are machined with grooves. Feeding cylinders 5 are symmetrically arranged on both sides of the slider 3. The cylinder body of the feeding cylinder 5 is square, and the inner side of the square cylinder body is embedded in the groove of the feeding cylinder support plate 3g and fixed by screws. The tail of the square cylinder body abuts against the step of the feeding cylinder support plate 3g, so that the fixing screw of the feeding cylinder 5 is not subjected to shear force and the feeding cylinder 5 body is prevented from displacing under force due to the gap of the screw hole. The two feeding cylinders 5 are symmetrically installed, and a guide rod and guide sleeve are provided in the middle to guide and prevent the feeding beam 4 from deflecting during feeding.

[0040] Two ejector cylinders 5 are connected to both ends of the ejector beam 4, which allows for the convenient setting of multiple ejector stations along the width of the slider 3 without the need to add too many ejector cylinders 5. The ejector rod 6 is much smaller in size than the ejector cylinders 5, requiring less installation space, and the molds at adjacent stations do not need to have their center distance increased. The ejector cylinders 5 are located outside the slider 3, and the hydraulic lines of the ejector cylinders 5 are easy to connect and maintain.

[0041] The feeding beam 4 is symmetrically equipped with guiding devices near both ends. The guiding device is formed by the cooperation of the guide rod 4b and the guide sleeve 4a. One end of the guide rod 4b is fitted into the hole inside the slider 3, and the other end of the guide rod 4b is embedded in the guide rod fixing sleeve. The guide rod fixing sleeve is embedded in the through hole on the working end face of the slider 3. The outer end of the guide rod fixing sleeve is provided with a guide rod fixing sleeve flange. The guide rod fixing sleeve flange abuts against the step at the outer end of the through hole. The guide rod cap covers the outside of the guide rod fixing sleeve flange and is fixedly connected to the slider 3 by screws together with the guide rod fixing sleeve flange.

[0042] A guide sleeve 4a is installed in the corresponding through hole of the feeding beam 4. The guide sleeve 4a is made of copper. The middle section of the guide rod 4b passes through the guide sleeve 4a and slides with it to guide the feeding beam 4, ensuring that the two ends of the feeding beam 4 move synchronously without tilting.

[0043] The guide sleeve 4a of the feeding beam is equipped with a lubricating oil groove and a dustproof ring, and is sealed with an O-ring. A lubricating oil port is provided at the corresponding position on the feeding beam 4, and the guide position can be lubricated by external oil injection. The lubrication of the two guide rods 4b is concentrated on the oil distribution block and connected to the lubrication connector through a lubrication hose. The lubrication connector is fixed to the side of the slider 3. When the feeding beam 4 moves, the lubrication hose moves flexibly.

[0044] The working surface of the slider 3 is provided with ejector rod mounting holes corresponding to each mold installation station. Each ejector rod mounting hole is fitted with an ejector rod copper sleeve 3h, and the outer flange of each ejector rod copper sleeve 3h is fixed to the outer step of the ejector rod mounting hole by screws. The outer end of each ejector rod 6 is inserted into the corresponding ejector rod copper sleeve 3h, and the inner threaded section of each ejector rod 6 is screwed into the corresponding threaded hole of the ejector beam 4. Each ejector rod 6 has a square tenon cutting surface on its outer circumference to facilitate tightening and fixing of the ejector rod 6 to the threaded hole of the ejector beam 4. The thread at the inner end of the ejector rod has a stepped surface, which abuts against the ejector beam 4 to bear force and prevent damage to the thread from excessive extrusion force during ejection.

[0045] Taking five stations as an example along the width direction of slider 3, the copper sleeves 3h of each station from front to back are provided with the following components in sequence: first station ejector rod 6a, second station ejector rod 6b, third station ejector rod 6c, fourth station ejector rod 6d, and fifth station ejector rod 6e.

[0046] The outer side of the worktable 2 is equipped with ejector cylinders 9 corresponding to each station of the worktable 2, which are used to eject the workpieces in the fixed mold. The ejector cylinders 9, from front to back, include the first station ejector cylinder 9a, the second station ejector cylinder 9b, the third station ejector cylinder 9c, the fourth station ejector cylinder 9d, and the fifth station ejector cylinder 9e. The ejector cylinders 9 are powered by the ejector cylinder pump station 13.

[0047] The ejector cylinder 9, piston cylinder 10, and plunger cylinder 11 are powered by the main cylinder pump station 12. In this horizontal hydraulic press, the ejector cylinder pump station 13 and the main cylinder pump station 12 are designed separately, eliminating the need for numerous intermediate pipeline connections. This facilitates independent control of the movement sequence of the ejector cylinder 9 and the slide block 3, improving work efficiency. It can achieve synchronous ejection of the slide block 3 during return stroke and the ejector cylinder 9, or sequential control, reducing cycle waiting time and effectively improving production efficiency.

[0048] In addition, the hydraulic press is equipped with guardrails 14 around its perimeter for safe maintenance; a ladder 15 is provided on the side of the machine body 1 for easy access for operators to perform maintenance.

[0049] The five-station horizontal hydraulic press is particularly suitable for multi-station forming of stepped shaft parts. By combining it with automated peripheral conveying devices, it can achieve automatic loading and unloading and automatic switching between stations, meeting the requirements of automated processing and improving work efficiency. Multiple stations are realized on a single hydraulic press, which not only improves work efficiency but also reduces the customer's equipment investment costs. It is especially suitable for multi-pass cold extrusion forming of stepped shaft parts, greatly improving production efficiency.

[0050] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A cold extrusion multi-station horizontal hydraulic press, comprising a machine body (1), the machine body (1) having an upper column (1a) and a lower column (1c) parallel to each other, the two ends of the upper column (1a) and the lower column (1c) being connected by a crossbeam (1b), characterized in that: A worktable (2) is provided on the inner side of a crossbeam (1b) at one end of the machine body (1), and a slider (3) is provided on the inner side of a crossbeam (1b) at the other end. The slider (3) and the worktable (2) share the same horizontal axis. The slider (3) has a feeding beam (4) that runs through the front and back of the slider in the middle of the height direction. Feeding cylinders (5) are symmetrically fixed on the front and back sides of the slider (3). The piston rod ends of the two feeding cylinders (5) are respectively connected to the ends of the feeding beam (4). The feeding beam (4) has guide devices symmetrically provided near both ends. The slider (3) has multiple forming stations in the width direction. Each forming station is equipped with a copper sleeve (3h) for feeding rods. Feeding rods are inserted into each copper sleeve (3h). The inner end of each feeding rod is screwed into the corresponding screw hole of the feeding beam (4).

2. The cold extrusion multi-station horizontal hydraulic press according to claim 1, characterized in that: The working surface of the slider (3) is provided with ejector rod mounting holes corresponding to each forming station. Each ejector rod mounting hole is fitted with an ejector rod copper sleeve (3h). The outer flange of each ejector rod copper sleeve (3h) is fixed in the outer step of the ejector rod mounting hole by screws. The outer end of each ejector rod is inserted into the corresponding ejector rod copper sleeve (3h). The inner end screw section of each ejector rod is screwed into the corresponding screw hole of the ejector beam (4). The outer end circumference of each ejector rod is provided with a square tenon cutting surface, which is used to tighten and fix the ejector rod to the screw hole of the ejector beam (4). The thread of the inner end of the ejector rod is provided with a stepped surface, and the stepped surface abuts against the ejector beam (4).

3. The cold extrusion multi-station horizontal hydraulic press according to claim 1, characterized in that: The cylinder body of the feeding cylinder (5) is square. The two side walls of the slider (3) are welded with feeding cylinder support plates (3g) with grooves. The inner side of the square cylinder body of the feeding cylinder is embedded in the groove and fixed with screws. The tail of the cylinder body abuts against the stepped surface of the groove.

4. The cold extrusion multi-station horizontal hydraulic press according to claim 1, characterized in that: The guiding device includes a feeding beam guide sleeve (4a) installed in the feeding beam (4) and a guide rod (4b) inserted into the feeding beam guide sleeve (4a). The two ends of the guide rod (4b) are fixed to the slider (3) and parallel to the slider axis.

5. The cold extrusion multi-station horizontal hydraulic press according to claim 1, characterized in that: The bottom of the front and rear ends of the worktable (2) is provided with a worktable adjustment seat (2a). The bottom of the worktable adjustment seat (2a) is fixed on the lower column (1c). The top of the worktable adjustment seat (2a) is screwed with a worktable adjustment screw. The top of the worktable adjustment screw abuts against the bottom of the worktable (2). Multiple mold adjustment seats (2b) are fixed at the lower part of the working end face of the worktable (2). Each mold adjustment seat (2b) is located below each forming station. Each mold adjustment seat (2b) is screwed with a push-pull screw for adjusting the mold height.

6. The cold extrusion multi-station horizontal hydraulic press according to claim 1, characterized in that: The lower part of the working end face of the slider (3) is fixed with multiple moving mold adjustment seats (3j). Each moving mold adjustment seat (3j) is located below each forming station. Each moving mold adjustment seat (3j) is screwed with a push-pull screw for adjusting the height of the moving mold.

7. The cold extrusion multi-station horizontal hydraulic press according to claim 1, characterized in that: The lower ends of the front and rear sides of the slider (3) are respectively connected to outwardly extending slider supports (3c). Each slider support (3c) is screwed with a roller adjusting screw (3d) at its top. The lower end of each roller adjusting screw (3d) is connected to a roller bracket (3e) that can move up and down along the slider support (3c). The lower end of the roller bracket (3e) extends out of the slider support (3c) and is equipped with a roller (3f). Each roller (3f) is supported on the top of the panel (8a) and moves along it. The panel (8a) is fixed to the top of the stop (8). The bottom of the stop (8) is embedded in the corresponding groove of the lower column (1c) and extends in the left and right direction.

8. The cold extrusion multi-station horizontal hydraulic press according to claim 7, characterized in that: The inner side of the stop (8) is provided with a body guide rail (7), the bottom of the body guide rail (7) is fixed on the lower column (1c), and the outer side wall of the body guide rail (7) is connected to the stop (8) by studs, so that the body guide rail (7) and the stop (8) are parallel to each other; the top and inner side wall of the body guide rail (7) are respectively fixed with copper guide plates (7a); the corner of the slider (3) is provided with a notched step, and a wedge (3a) is provided below the notched step. A slider guide rail (3b) is provided below the wedge (3a), and the wedge (3a) is provided with a slider guide rail (3b). The lower inclined surface of 3a) abuts against the upper inclined surface of the slider guide rail (3b). The wedge (3a) is connected to the slider (3) by a wedge adjusting screw extending in the front-back direction. The slider guide rail (3b) is also connected to the side wall of the slider (3) by a screw. The bottom of the slider guide rail (3b) is supported on the copper guide plate (7a) at the top of the body guide rail (7). The outer corner wall of the slider (3) cooperates with the copper guide plate (7a) on the inner side wall of the body guide rail (7) to precisely guide the slider (3) in the front-back direction.

9. The cold extrusion multi-station horizontal hydraulic press according to claim 1, characterized in that: The slider (3) is driven by two symmetrically arranged piston cylinders (10) and a plunger cylinder (11) located in the middle. The plunger cylinder (11) is used for rapid advance during idle stroke, and the piston cylinder (10) is used for pressurization and return stroke. The workbench (2) is equipped with ejector cylinders (9) on the outside corresponding to each work station, which are used to eject the workpiece in the fixed mold; the piston cylinder (10) and plunger cylinder (11) are supplied with oil by the main cylinder pump station (12), and the ejector cylinder (9) is supplied with oil independently by the ejector cylinder pump station (13). The two pump stations are linked through the control system.

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