Dual-performance press

Abstract

A dual-performance press machine comprises a machine frame and a hydraulic cylinder installed on the top of the machine frame, a lead screw is installed in the middle of the top of a hydraulic cylinder body through a bearing, a through hole is formed in the middle of a piston of the hydraulic cylinder, the through hole is aligned with a blind hole in the middle of a piston rod, and threaded sleeves are installed in the middle hole of the piston and the blind hole in the middle of the piston rod. The internal thread part of the thread bushing is matched with the external thread part of the lead screw, the internal thread of the thread bushing and the external thread of the lead screw are large-lead non-self-locking threads, a flywheel is installed on the top of the lead screw, and the universal lead screw has the advantage of being good in universality and capable of meeting the technological requirements of some specific products.

Description

Technical Field

[0001] The invention relates to forging equipment, in particular to a press, and belongs to the technical field of presses. Background Art

[0002] As we all know, screw press and hydraulic press are two presses with different performances. The performance of screw press is suitable for forging and die forging, while the performance of hydraulic press is suitable for stretching and profiling operations. Therefore, these two presses are generally only suitable for some specific product processes, and thus have the defect of poor versatility. At the same time, they are not suitable for the manufacturing process requirements of some specific products. Summary of the invention

[0003] The purpose of the present invention is to address the respective limitations of the above-mentioned screw press and hydraulic press, namely, the defects of poor versatility and unsuitability for the manufacturing process requirements of some specific products. The present invention provides a dual-performance press, which has the characteristics of both a screw press and a hydraulic press, and thus has the advantage of good versatility and can also be applied to the process requirements of some specific products.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: the dual-performance press comprises a frame and a hydraulic cylinder installed on the top of the frame, the bearing of the screw is installed in the middle of the top of the hydraulic cylinder body, the middle of the piston of the hydraulic cylinder has a through hole, the through hole is aligned with the blind hole in the middle of the piston rod, and a threaded sleeve is installed at the position of the middle hole of the piston and the blind hole in the middle of the piston rod, the internal thread part of the threaded sleeve and the external thread part of the screw cooperate with each other, the internal thread of the threaded sleeve and the external thread of the screw are large-lead non-self-locking threads, the pressure cover is connected to the screw extending out of the top of the cylinder body through the middle hole thereof, and the pressure cover is fixed to the top of the cylinder body, a sealing ring is arranged between the pressure cover and the screw, and a flywheel is installed on the top of the screw.

[0005] The working principle of the present invention is: when hydraulic oil is introduced into the upper chamber of the hydraulic cylinder, the hydraulic oil pushes the piston and the piston rod to move downward. Since the thread between the lead screw and the threaded sleeve it cooperates with is a large-lead non-self-locking thread, the lead screw rotates while the piston and the piston rod move downward. The energy of its rotation is stored by the flywheel. When the piston rod contacts the workpiece and is obstructed by the workpiece, the flywheel releases energy to form a stamping state for the workpiece. When hydraulic oil is introduced into the lower chamber of the hydraulic cylinder, the lead screw reverses and makes a return motion.

[0006] Beneficial effects: It can be seen from the structural principle diagram and working principle of the present invention that during the working process, the present invention, on the one hand, forms a pressurized state on the workpiece through the hydraulic cylinder, and on the other hand, the flywheel releases energy to form an impact pressing state on the workpiece. It has the dual working characteristics of a hydraulic press and a screw press. Therefore, the present invention has the advantage of good versatility, and at the same time, it can also be applicable to the process requirements of some specific products. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structural principle of the present invention; As shown in the figure: 1 is the piston rod; 2 is the lead screw; 3 is the cylinder head; 4 is the piston; 5 is the cylinder body; 6 is the bearing; 7 is the pressure cover; 8 is the sealing ring; 9 is the flywheel; 10 is the frame; 11 is the threaded sleeve; 12 is the blind hole. DETAILED DESCRIPTION

[0008] Combined with Figure 1 , the specific implementation mode of the present invention is: The dual-performance press comprises a frame (10) and a hydraulic cylinder mounted on the top of the frame, a lead screw (2) being mounted in the middle of the top of the hydraulic cylinder body (5) by a bearing (6), a through hole being provided in the middle of the piston (4) of the hydraulic cylinder, the through hole being aligned with a blind hole (12) in the middle of the piston rod (1), a threaded sleeve (11) being installed at the position of the middle hole of the piston (4) and the blind hole (12) in the middle of the piston rod (1), the internal thread of the threaded sleeve (11) being matched with the external thread of the lead screw (2), the internal thread of the threaded sleeve (1) and the external thread of the lead screw (2) being large-lead non-self-locking threads, a gland (7) being sleeved on the lead screw (2) extending out of the top of the cylinder body (5) through the middle hole thereof, and the gland (7) being fixed to the top of the cylinder body (5), a sealing ring (8) being provided between the gland (7) and the lead screw (2), and a flywheel (9) being installed at the top of the lead screw (2).

Claims

1. A dual-performance press, comprising a frame (10) and a hydraulic cylinder mounted on the top of the frame, characterized in that: The lead screw (2) is mounted in the middle of the top of the hydraulic cylinder body (5) with a bearing (6). A through hole is provided in the middle of the piston (4) of the hydraulic cylinder. The through hole is aligned with the blind hole (12) in the middle of the piston rod (1). A threaded sleeve (11) is installed at the position of the middle hole of the piston (4) and the blind hole (12) in the middle of the piston rod (1). The internal threaded portion of the threaded sleeve (11) cooperates with the external threaded portion of the lead screw (2). A flywheel (9) is installed at the top of the lead screw (2).

2. According to claim 1, the dual-performance press is characterized in that: The internal thread of the threaded sleeve (1) and the external thread of the lead screw (2) are large-pitch non-self-locking threads.

3. According to claim 1, the dual-performance press is characterized in that: The gland (7) is sleeved on the lead screw (2) extending out of the top of the cylinder body (5) through the middle hole thereof, and the gland (7) is fixed to the top of the cylinder body (5).

4. According to claim 3, the dual-performance press is characterized in that: A sealing ring (8) is provided between the gland (7) and the lead screw (2).

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