Lower ejection detection device of die forging press

Abstract

A lower ejector detection device of a die forging press comprises a synchronous frame, a guide rod, a supporting rod and a proximity switch, one end of the synchronous frame is fixedly connected with a lower ejector rod used for ejecting on the die forging press, the other end of the synchronous frame is connected with the guide rod, the guide rod is arranged outside the die forging press and is parallel to the lower ejector rod, and the proximity switch is arranged on the lower ejector rod. The upper portion of the guide rod is provided with detection metal used in cooperation with the proximity switch. The supporting rod is arranged on one side of the guide rod, two proximity switches are arranged on the upper portion of the supporting rod and are the first proximity switch and the second proximity switch respectively, and the distance between the first proximity switch and the second proximity switch is the same as the stroke needed by the lower ejector rod to push out the forge piece. The proximity switch for detection is arranged outside the die forging press, the moving stroke of the lower ejector rod can be detected from the outside of the die forging press, the proximity switch can be prevented from being affected by the forging process, and it is guaranteed that signals of the proximity switch are stable and accurate.

Description

Technical Field

[0001] The utility model belongs to the field of metal processing equipment, and in particular relates to a lower ejection material detection device of a die forging press. Background Art

[0002] The die forging press is mainly used in the field of metal processing and is an important industrial equipment. It shapes metal materials into various shapes and sizes by applying huge pressure and force. The development and application of forging presses have played an important role in improving production efficiency, improving product quality and promoting industrial development. The lower ejector device, as the main component of the die forging press, ejects the forging from bottom to top after the forging material is die-forged, so that the forging is separated from the die, so that the worker can easily clamp and remove the forging to proceed to the next process.

[0003] The lower ejector device of the die forging press is generally designed to be hydraulically driven, and the hydraulic cylinder pushes the ejector rod to eject the forging from the die. Since the impact force generated during work reacts on the hydraulic system, the instantaneous pressure of the system oil will be unstable, which will cause a certain degree of damage to the hydraulic system; and the frequent operation of the hydraulic system will cause the oil temperature to rise and the viscosity to decrease under the action of pressure, resulting in abnormal oil supply. Ultimately, the hydraulic system will be insufficient or no pressure, so that the ejector rod cannot push out the forging normally, and the workers cannot take out the forging in a short time, and production cannot be carried out normally, which reduces production efficiency and wastes manpower and financial resources.

[0004] Since it is difficult for workers to observe with the naked eye from the outside whether the forging is completely ejected from the die, a corresponding ejector detection device is required. The detection device detects the movement stroke of the ejector rod and thereby determines whether the forging is completely ejected.

[0005] The existing detection devices of the lower ejection device mostly use proximity switches, and the proximity switches and hydraulic cylinders are placed in the hollow position under the workbench. However, the forging process causes severe vibration, making the proximity switch receiving signal extremely unstable. In addition, the hollow position has a high temperature and a high dust density, while the proximity switch itself is not strong. Once a fault occurs, it is difficult for workers to replace it in this environment, which seriously affects the production process. Utility Model Content

[0006] The utility model aims to provide a lower ejector material detection device for a die forging press, in which a proximity switch for detection is arranged outside the die forging press, and the moving stroke of the lower ejector rod can be detected from outside the die forging press, thereby preventing the proximity switch from being affected by the forging process and ensuring that the signal of the proximity switch is stable and accurate.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a lower ejector detection device for a die forging press, comprising a synchronous frame, a guide rod, a support rod and a proximity switch, one end of the synchronous connecting frame is fixedly connected to the lower ejector rod on the die forging press for ejecting the material, and the other end is connected to the guide rod, the guide rod is arranged outside the die forging press and parallel to the lower ejector rod, and the upper part of the guide rod is provided with a detection metal for use with the proximity switch; the support rod is arranged on one side of the guide rod, and two proximity switches are arranged on the upper part of the support rod, namely a first proximity switch and a second proximity switch, and the distance between the first proximity switch and the second proximity switch is the same as the stroke required for the lower ejector rod to push out the forging.

[0008] The synchronous frame is arranged horizontally.

[0009] One end of the synchronous frame is clamped in the clamping groove at the lower part of the lower push rod and fixed by bolts, and the other end is provided with a connecting ring with internal threads, and the connecting ring is threadedly connected with the guide rod.

[0010] A locking nut for pre-tightening the connecting ring is also arranged at the lower part of the guide rod.

[0011] The upper part of the guide rod is slidably arranged in the guide sleeve, and the guide sleeve is fixed on the support rod or on the base of the press machine.

[0012] The upper part of the support rod is provided with a threaded section for installing the proximity switch, and a nut is provided on the threaded section. The proximity switch is clamped up and down by the cooperation of the two nuts.

[0013] The detection metal is provided with a threaded hole, which is matched and connected with the external thread on the upper part of the guide rod.

[0014] The beneficial effect of the utility model is that the utility model sets the proximity switch on one side of the die forging press, and connects the lower ejector rod and the guide rod by a synchronous frame to ensure the synchronous movement of the guide rod and the ejector rod, so that by detecting the displacement of the guide rod, it can be judged whether the lower ejector rod has ejected the forging into place. This structure can prevent the proximity switch from being affected by the vibration, high temperature and dust of the forging process, and ensure that the signal of the proximity switch is accurate, timely and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1It is a schematic diagram of the structure of the utility model on a die forging press;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model;

[0018] Markings in the figure: 1. die forging press, 2. lower ejector rod detection device, 3. press base foundation, 4. ejector rod guide sleeve, 5. workbench pad, 6. fuselage base, 7. lower ejector rod, 8. synchronous frame, 9. hydraulic cylinder, 10. support rod, 11. guide sleeve, 12. guide rod, 13. metal detection, 14. first proximity switch, 15. second proximity switch. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention in any way.

[0020] like Figure 1 As shown, the lower ejector rod detection device 2 of the utility model is arranged on the press base 3 of the die forging press 1, and its main part is located outside the space below the die forging press 1. The specific structure can be referred to Figure 2 shown.

[0021] like Figure 2 As shown in the figure, the bottom of the lower ejector of the die forging press is connected to the piston of the hydraulic cylinder, and the hydraulic cylinder pushes the lower ejector to move up and down; the upper part of the lower ejector is slidably arranged in the through holes of the machine body base and the workbench pad, and the ejector guide sleeve is installed in the through hole of the workbench pad to reduce friction. Under the push of the hydraulic cylinder, the lower ejector pushes upward to push the forging in the die out of the die so that the worker can take out the forging.

[0022] Continue to refer Figure 2 The lower ejector rod detection device 2 includes a synchronous frame 8, a guide rod 12, a guide sleeve 11, a metal detector 13, a support rod 10 and two proximity switches. The support rod 10 is vertically fixed on a platform inside the foundation pit of the press base foundation 3. The support rod 10 is parallel to the lower ejector rod 7. The top of the support rod 10 extends out of the foundation pit of the press base foundation 3 and is equipped with two proximity switches, namely, a first proximity switch 14 at the bottom and a second proximity switch 15 at the top. A threaded section is provided at the top of the support rod 10, and a nut is installed on the threaded section. The proximity switch is clamped and fixed on the support rod 10 using two nuts. Through the cooperation of the nut and the threaded section, the upper and lower positions of each proximity switch can be adjusted, and then the upper and lower spacing of the two proximity switches can be adjusted to adapt to different ejector rod discharge strokes. The first proximity switch 14 is used to detect the initial position of the lower ejector rod 7, and the second proximity switch 15 is used to detect the ejection position of the lower ejector rod 7. Therefore, the distance between the two proximity switches is the stroke required for the forging to be ejected smoothly.

[0023] A guide sleeve 11 is provided on the upper part of the foundation pit of the press base foundation 3, and the upper part of a guide rod 12 parallel to the lower push rod 7 is slidably arranged in the guide sleeve 11, and the lower end of the guide rod 12 is connected to the lower push rod 7 through a synchronous frame 8, so as to realize the synchronous movement of the guide rod 12 and the lower push rod 7, and a detection metal 13 for cooperating with the proximity switch is installed on the upper end of the guide rod 12. When the detection metal 13 enters the detection range of a proximity switch during the up and down movement of the guide rod 12, the proximity switch will be triggered, thereby controlling the action of the hydraulic cylinder 9.

[0024] The guide sleeve 11 can also be fixed on the support rod 10 .

[0025] One end of the synchronous frame 8 is inserted into the groove at the bottom of the lower push rod 7, and then the synchronous frame 8 is fixed to the lower push rod 7 with bolts; the other end of the synchronous frame 8 is provided with a connecting ring, and an internal thread is provided on the inner side of the connecting ring. After the connecting ring is threadedly connected to the lower part of the guide rod 12, a spring washer and a locking nut are used for pre-tightening, so as to prevent the synchronous frame 8 from being disengaged from the guide rod 12, and ensure that the guide rod 12 can move synchronously with the lower push rod 7.

[0026] Furthermore, the synchronous frame 8 is installed horizontally, perpendicular to the lower push rod 7 and the guide rod 12, so as to prevent the guide rod 12 from getting stuck in the guide sleeve 11.

[0027] The detection metal 13 is provided with a threaded hole, and the detection metal 13 is connected to the upper part of the guide rod 12 through threads, and the position of the detection metal 13 can be adjusted up and down through the threads.

[0028] The detection process of the lower ejector rod of the utility model is as follows: when the lower ejector rod 7 is needed to eject the forging upward, the hydraulic cylinder 9 pushes the lower ejector rod 7 to move upward, so that the forging is separated from the die, and the ejector rod guide sleeve 4 can limit the movement direction of the lower ejector rod 7, so that the forging is not damaged due to uneven force when it is pushed away; during the upward movement of the lower ejector rod 7, the guide rod 12 moves synchronously with the lower ejector rod 7 through the connection of the synchronous frame 8, and when the detection metal 13 at the upper end of the guide rod 12 is aligned with the second proximity switch 15, the second proximity switch 15 detects the detection metal 13 and generates a corresponding signal, and the press control system controls the hydraulic cylinder 9 to stop the action according to the signal of the second proximity switch 15. At this time, the lower ejector rod 7 pushes the forging out of the die and keeps it for a period of time, so that the workers can take out the forging.

[0029] When the hydraulic cylinder 9 drives the lower push rod 7 to reset, when the detection metal 13 on the guide rod 12 is aligned with the first proximity switch 14, the first proximity switch 14 detects the detection metal 13 and generates a corresponding signal. The press control system controls the hydraulic cylinder 9 to stop moving according to the signal of the first proximity switch 14, and the lower push rod 7 returns to its initial position.

[0030] Since the press control system receives the signal from the first proximity switch 14, it indicates that the lower push rod 7 has returned to the initial position, and the press can be allowed to forge. At the same time, the proximity switch is set outside the foundation pit, which can also facilitate the observation of the positional relationship between the detection metal 13 and the first proximity switch 14, and then determine whether the push rod has returned to the initial position; to avoid the damage to the hydraulic cylinder caused by the lower push rod not returning to the initial position and the press striking.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can be modified or replaced by equivalents with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. A lower ejection material detection device for a die forging press, characterized in that: It includes a synchronous frame, a guide rod, a support rod and a proximity switch. One end of the synchronous frame is fixedly connected to a lower push rod on a die forging press for pushing out materials, and the other end is connected to the guide rod. The guide rod is arranged outside the die forging press and is parallel to the lower push rod. The upper part of the guide rod is provided with a detection metal for use with the proximity switch; the support rod is arranged on one side of the guide rod, and two proximity switches are arranged on the upper part of the support rod, namely a first proximity switch and a second proximity switch, and the distance between the first proximity switch and the second proximity switch is the same as the stroke required for the lower push rod to push out the forging.

2. The device for detecting the lower ejection of a die forging press according to claim 1, characterized in that: The synchronous frame is arranged horizontally.

3. The device for detecting the lower ejection of a die forging press according to claim 1, characterized in that: One end of the synchronous frame is clamped in the clamping groove at the lower part of the lower push rod and fixed by bolts, and the other end is provided with a connecting ring with internal threads, and the connecting ring is threadedly connected with the guide rod.

4. The device for detecting the lower ejection of a die forging press according to claim 3, characterized in that: A locking nut for pre-tightening the connecting ring is also arranged at the lower part of the guide rod.

5. The device for detecting the lower ejection of a die forging press according to claim 1, characterized in that: The upper part of the guide rod is slidably arranged in the guide sleeve, and the guide sleeve is fixed on the support rod or on the base of the press machine.

6. The device for detecting the lower ejection of a die forging press according to claim 1, characterized in that: The upper part of the support rod is provided with a threaded section for installing the proximity switch, and a nut is provided on the threaded section. The proximity switch is clamped up and down by the cooperation of the two nuts.

7. The device for detecting the lower ejection of a die forging press according to claim 1, characterized in that: The detection metal is provided with a threaded hole, which is matched and connected with the external thread on the upper part of the guide rod.

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