A feeding speed stabilizing device for machine tools

Abstract

The present invention relates to a machine tool feeding speed stabilizing device, comprising a rack, a gear, a gearbox, a hydraulic pump, a relief valve, and a hydraulic oil tank. The rack is mounted on the machine tool bed or on the foundation, the gearbox and the hydraulic oil tank are mounted on the feeding component, the gear is mounted on the power input shaft of the gearbox, and the gear is meshed with the rack; the hydraulic pump is mounted on the top of the gearbox, the power input shaft of the hydraulic pump is connected to the power output shaft of the gearbox, the inlet of the hydraulic pump is connected to the hydraulic oil tank through a pipeline, the outlet of the hydraulic pump is connected to the inlet of the relief valve through a pipeline, and the outlet of the relief valve is connected to the hydraulic oil tank through a pipeline. The beneficial effects are: the gear clearances of various levels of the feeding transmission device are eliminated through the reverse resistance effect, the feeding system is prevented from creeping or moving due to the travel resistance or load change, the stability of the machine tool is improved, the processing quality and production efficiency of the machine tool are improved, and equipment failures are reduced.

Description

Technical Field

[0001] The invention relates to the field of machine tools, and in particular to a feeding speed stabilizing device for machine tools. Background Art

[0002] The steel plate edge milling machine of JCOE Steel Pipe Factory is used to process the groove of the straight seam weld. The steel plate edge milling machine consists of a milling unit and a steel plate feeder. The steel plate feeder is driven by an electric motor through a reducer, a gear rack, and runs on a horizontal track. The steel plate feeder moves due to wear, chip jamming, changes in the cutting force of the milling cutter, and gear clearance in the feed drive system of the feeder, which affects production efficiency and leads to equipment failure and increased blade consumption.

[0003] The straight seam submerged arc welding machine of JCOE Steel Pipe Factory is used for straight seam welding of steel pipes. The welding carriage is driven by an electric motor through a reducer, gear rack, and runs on a horizontal track. Due to manufacturing, installation, wear, dust and other reasons, the resistance of the carriage is not stable. In addition, there are gaps between the gear pairs of each level of the reduction box, and there are also gaps between the gears and racks. The uneven resistance and the gap in the transmission device cause the carriage to crawl. When the resistance is large, the carriage stagnates, and when the resistance is small, the carriage rushes forward. The stability of the welding carriage speed affects the quality of the weld. Summary of the invention

[0004] The purpose of the present invention is to overcome the above problems existing in the prior art and provide a feeding speed stabilizing device for a machine tool.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A machine tool feeding speed stabilizing device comprises a rack, a gear, a gearbox, a hydraulic pump, a relief valve and a hydraulic oil tank, wherein the rack is mounted on a machine tool bed or a foundation, the gearbox and the hydraulic oil tank are mounted on a feeding component, the gear is mounted on a power input shaft of the gearbox, and the gear is meshed with the rack; the hydraulic pump is mounted on the top of the gearbox, the power input shaft of the hydraulic pump is connected to the power output shaft of the gearbox, the inlet of the hydraulic pump is connected to the hydraulic oil tank through a pipeline, the outlet of the hydraulic pump is connected to the inlet of the relief valve through a pipeline, and the outlet of the relief valve is connected to the hydraulic oil tank through a pipeline.

[0007] Furthermore, it also includes a reversing valve, wherein the first oil inlet of the reversing valve is connected to the outlet of the hydraulic pump through a pipeline, and the first oil outlet of the reversing valve is connected to the hydraulic oil tank; when the reversing valve is in a first position, the first oil inlet of the reversing valve is connected to the first oil outlet; when the reversing valve is in a second position, the first oil inlet of the reversing valve is blocked from the first oil outlet.

[0008] The beneficial effects of the present invention are as follows: when the feeding component moves on the machine tool bed, the gear rotates relative to the rack, driving the gear in the gearbox to rotate, thereby driving the hydraulic pump to pump hydraulic oil, and the relief valve plays a role in flow control of the hydraulic oil, so that the hydraulic pump is subjected to a reverse hydraulic oil output pressure, and through the cooperation of the gearbox, gear and rack, an adjustable reverse resistance is generated for the movement of the feeding component; the reverse resistance effect eliminates the clearance between the gears of each level of the feeding transmission device, avoids creeping or swaying of the feeding system due to travel resistance or load changes, improves the stability of the machine tool, improves the processing quality and production efficiency of the machine tool, and reduces equipment failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0010] Figure 1 It is a front view structural diagram of the machine tool feeding speed stabilizing device in the present invention;

[0011] Figure 2 It is a schematic diagram of the structure of the feeding speed stabilizing device of a machine tool in the present invention when viewed from above;

[0012] Figure 3 It is a hydraulic principle diagram of the feeding speed stabilizing device of the machine tool in the present invention;

[0013] Explanation of the numbers in the figure: rack 1, gear 2, gearbox 3, hydraulic pump 4, overflow valve 5, reversing valve 6, pressure gauge 7, hydraulic oil tank 8, machine tool bed 100, feeding component 200. DETAILED DESCRIPTION

[0014] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0015] like Figures 1 to 3 As shown, a machine tool feeding speed stabilizing device includes a rack 1, a gear 2, a gearbox 3, a hydraulic pump 4, a relief valve 5, a hydraulic oil tank 8, and a reversing valve 6. The rack 1 is installed on a machine tool bed 100 or a foundation, the gearbox 3 and the hydraulic oil tank 8 are installed on a feeding component 200, the gear 2 is installed on a power input shaft of the gearbox 3, the gear 2 is meshed with the rack 1, the hydraulic pump 4 is installed on the top of the gearbox 3, the power input shaft of the hydraulic pump 4 is connected to the power output shaft of the gearbox 3 through a coupling, the inlet of the hydraulic pump 4 is connected to the hydraulic oil tank 8 through a pipeline, the outlet of the hydraulic pump 4 is connected to the inlet of the relief valve 5 through a pipeline, and the outlet of the relief valve 5 is connected to the hydraulic oil tank 8 through a pipeline.

[0016] When the feeding component 200 moves on the machine tool bed 100, the gear 2 rotates relative to the rack 1, driving the gear in the gearbox 3 to rotate, thereby driving the hydraulic pump 4 to pump hydraulic oil, and the relief valve 5 plays a role in flow control of the hydraulic oil, so that the hydraulic pump 4 is subjected to reverse hydraulic oil output pressure, and through the cooperation of the gearbox 3, gear 2, and rack 1, an adjustable reverse resistance is generated to the movement of the feeding component 200.

[0017] The first oil inlet of the reversing valve 6 is connected to the outlet of the hydraulic pump 4 through a pipeline, and the first oil outlet of the reversing valve 6 is connected to the hydraulic oil tank 8; when the reversing valve 6 is in the first position, the first oil inlet of the reversing valve 6 is connected to the first oil outlet; when the reversing valve 6 is in the second position, the first oil inlet of the reversing valve 6 is blocked from the first oil outlet. When the overflow valve 5 works normally, the reversing valve 6 is kept in the second position; when the load of the hydraulic pump 4 needs to be unloaded, the reversing valve 6 is switched to the first position.

[0018] A pressure gauge 7 for detecting the oil outlet pressure of the hydraulic pump 4 is also installed on the outlet of the hydraulic pump 4, so as to observe the oil outlet pressure of the hydraulic pump 4 in real time and adjust the resistance of the relief valve 5 conveniently.

[0019] The reversing valve 6 is a two-position four-way valve. The gearbox 3 is a speed increasing gearbox, which can transform the low speed rotation of the gear meshing with the rack into a high speed rotation power capable of driving the hydraulic pump to work.

[0020] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A feeding speed stabilizing device for a machine tool, characterized in that: It includes a rack, a gear, a gearbox, a hydraulic pump, a relief valve, and a hydraulic oil tank. The rack is installed on the machine tool bed or on the foundation. The gearbox and the hydraulic oil tank are installed on the feeding component. The gear is installed on the power input shaft of the gearbox, and the gear is meshed with the rack. The hydraulic pump is installed on the top of the gearbox, and the power input shaft of the hydraulic pump is connected to the power output shaft of the gearbox. The inlet of the hydraulic pump is connected to the hydraulic oil tank through a pipeline, the outlet of the hydraulic pump is connected to the inlet of the relief valve through a pipeline, and the outlet of the relief valve is connected to the hydraulic oil tank through a pipeline.

2. The machine tool feeding speed stabilizing device according to claim 1, characterized in that: It also includes a reversing valve, a first oil inlet of the reversing valve is connected to the outlet of the hydraulic pump through a pipeline, and a first oil outlet of the reversing valve is connected to the hydraulic oil tank; when the reversing valve is in a first position, the first oil inlet of the reversing valve is connected to the first oil outlet; when the reversing valve is in a second position, the first oil inlet of the reversing valve is blocked from the first oil outlet.

3. The machine tool feeding speed stabilizing device according to claim 2, characterized in that: The reversing valve is a two-position four-way valve.

4. The machine tool feeding speed stabilizing device according to claim 1, characterized in that: A pressure gauge for detecting the oil outlet pressure of the hydraulic pump is also installed on the outlet of the hydraulic pump.

5. The machine tool feeding speed stabilizing device according to claim 1, characterized in that: The gearbox is a speed increasing gearbox.

Images