Follow - type noise reduction chip removal system

Abstract

Follow - type noise - reduction chip - removal system, which relates to a noise - reduction chip - removal system, solves the problems that the existing technologies using copper sheets for noise reduction or sound - proof enclosures cannot meet the usage requirements. The system includes a driving tooling, a special - shaped chute assembly, a sound - absorbing trolley, and a driving trolley; the driving tooling is connected to the machine tool spindle and embedded in the chute of the special - shaped chute assembly; the driving trolley is fixed on the special - shaped frame of the special - shaped chute assembly; the sound - absorbing trolley assembly is magnetically connected to the driving trolley through a driving magnet to obtain the driving force for moving along the cavity of the workpiece to be machined; the sound - absorbing trolley is inserted into the cavity of the workpiece to be machined, and the driving trolley provides the driving force to move along the cavity, so as to absorb sound waves at the closest position. The present invention reduces the vibration generated during machining and has no impact on the machining quality and the machine tool. The sound - absorbing trolley and the driving trolley can be modularly designed to increase versatility. The structure is simple, easy to manufacture, and has a low cost. The present invention effectively reduces noise.

Description

Technical Field

[0001] The present invention relates to a noise reduction and chip removal system, and more particularly to a following noise reduction and chip removal system. Background Art

[0002] To meet the design requirements of rail passenger cars, thin-walled aluminum profiles with excellent machinability, formability, recyclability, small weight, high strength, and corrosion resistance are widely used in the manufacture of rail passenger car bodies. Therefore, there are a large number of long-sized hollow structural parts in rail vehicles, such as side walls, floors, and roofs, with a width of more than 3 meters and a length of up to 20 meters. According to functional requirements, there are many openings in the components themselves, such as windows and doorways on the side walls, air-conditioning wells and electrical wells on the roofs, and the components themselves also need to be connected to other parts or other small components are installed on them, so that these long and large structural components need to be subjected to a large amount of cutting processing.

[0003] There are the following problems in processing such long and large components:

[0004] The processing of long and large profiles is complex in shape, and milling is mostly used for processing. During the milling process, the milling cutter processes discontinuously. When the milling cutter blade contacts the workpiece, cutting force is generated, and when it does not contact, there is no cutting force. The impact from non-contact to contact and the discontinuous change of cutting force cause vibration between the tool and the workpiece during the processing, generating noise. On the other hand, the profile structure is mostly designed to meet the principle of triangle stability (triangle stability means that a triangle has stability, with the characteristics of firmness, firmness, and pressure resistance. For example, the Egyptian pyramids, steel rails, triangular frames, cranes, triangular jibs, roofs, triangular steel frames, steel frame bridges, and the Eiffel Tower are all built in the shape of a triangle), and its strength is more prominent than other structures. However, this structure has natural disadvantages during the milling process. Since the profile wall is thin, during milling, local rigidity deficiency will occur in the profile wall, resulting in an increase in the original vibration amplitude of the profile, causing a louder processing sound and a decrease in processing accuracy at the same time;

[0005] In addition, the triangular cavities in the profile will transmit the noise, and during the transmission process, the cavities also play a role in gathering the noise, resulting in the noise not dissipating. Therefore, a large amount of noise will be generated during the processing of the profile.

[0006] There are two existing technical solutions. One is to prepare copper sheets of different thicknesses in advance. After the workpiece is clamped on the workbench or fixture, appropriate copper sheets are padded at the gap positions. The other is to install a sound insulation cover outside the machine tool. The following disadvantages exist in each of the two cases:

[0007] (1) When the gap is small, only thin copper sheets can be selected, but the thin copper sheets have low strength and are difficult to be inserted into the gap, making the process of padding the fixture time-consuming and laborious;

[0008] (2) When the contact surface of the workpiece is not flat, only a small part of the copper sheet can be inserted, resulting in a further reduction in the contact surface between the workpiece and the spacer block, making the workpiece more unstable.

[0009] The following defects exist when using a sound insulation cover:

[0010] (1) The cost of a large sound insulation cover is as high as hundreds of thousands or even millions of yuan, and the cost is too high;

[0011] (2) After installing the sound insulation cover, the operation of the workpiece is very complicated, affecting the processing efficiency;

[0012] (3) The operator needs to operate inside the sound insulation cover. The sound insulation cover is only effective for the surrounding environment and has no effect on the operator of this machine tool.

[0013] Based on the above technical problems, those skilled in the art urgently need to develop a follow-up noise reduction and chip removal system. Summary of the Invention

[0014] In order to solve the problems that existing technologies using copper sheets for noise reduction or sound insulation covers cannot meet the usage requirements, the present invention provides a follow-up noise reduction and chip removal system.

[0015] The follow-up noise reduction and chip removal system includes a driving tooling, a special-shaped chute assembly, a sound-absorbing trolley, and a driving trolley;

[0016] The driving tooling is connected to the machine tool spindle and embedded in the chute of the special-shaped chute assembly;

[0017] The driving trolley is fixed on the special-shaped frame of the special-shaped chute assembly;

[0018] The sound-absorbing trolley assembly is magnetically connected to the driving trolley through a driving magnet to obtain the driving force for moving along the cavity of the workpiece to be machined;

[0019] The sound-absorbing trolley is inserted into the cavity of the workpiece to be machined, and the driving trolley provides the driving force to move along the cavity, so as to absorb sound waves at the nearest position.

[0020] Advantages of the present invention: The follow-up noise reduction and chip removal system of the present invention utilizes the movement of the sound-absorbing trolley in the tubular cavity to ensure that it can move to the most suitable position for absorbing noise, achieving the purpose of vibration reduction and noise reduction, and at the same time being able to remove chips or other impurities in the cavity. At the same time, the modular design has strong versatility.

[0021] The present invention can be inserted into the cavity interior by designing a new structure, close to the noise source, reducing vibration and absorbing noise from the source; at the same time, applying flexible shock-absorbing materials to contact the workpiece to reduce the harm caused by vibration to the machine tool, workpiece, and human body. Specifically, it has the following advantages:

[0022] (1) Reduce the vibration generated during the machining process without affecting the machining quality and the machine tool.

[0023] (2) The sound-absorbing trolley and the driving trolley can be modularly designed to increase versatility. The structure is simple, easy to manufacture, and has a low cost.

[0024] (3) The vibration can be reduced at the closest distance, shortening the distance of sound wave propagation, effectively reducing noise. Reduce the harm to human physical and mental health.

[0025] (4) The chips generated by mechanical machining can be removed during the movement, reducing the influence of solid and liquid residues on the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural view of the floor of the workpiece to be machined in the follow-up noise reduction and chip removal system according to the present invention;

[0027] Figure 2 It is a schematic structural view of the follow-up noise reduction and chip removal system according to the present invention;

[0028] Figure 3 It is a schematic structural view of the sound-absorbing trolley from different perspectives;

[0029] Figure 4 It is a schematic structural view of the special-shaped chute;

[0030] Figure 5 It is a schematic structural view of the driving tooling;

[0031] Figure 6 It is a schematic structural view of the driving trolley.

[0032] In the figure: 1, driving tooling; 2, special-shaped chute part; 3, driving trolley; 4, sound-absorbing trolley; 10, workpiece to be machined; 11, machine tool spindle;

[0033] 101, fixing frame; 102, cross beam; 103, longitudinal beam; 104, longitudinal connecting shaft; 105, slider; 106, pulley;

[0034] 201, chute; 202, special-shaped frame; 203, chute part; 204, mating surface;

[0035] 301, driving vehicle body; 302, driving shaft; 303, bearing roller; 304, driving magnet;

[0036] 401, sound-absorbing sponge; 402, vehicle body; 403, bottom driving shaft; 404, driving magnet; 405, bearing roller; 406, side wall driving shaft; 407, side wall magnet;

[0037] 1001, machining surface; 1002, profile cavity; 1003, part to be machined. Detailed implementation mode

[0038] Combined with Figures 1 to 6 This implementation mode is described. The follow-up noise reduction chip removal system is composed of several parts such as a sound absorption trolley 4, a driving trolley 3, a special-shaped chute 2, a driving tooling 1, etc.

[0039] The sound absorption trolley 4 includes a sound absorption vehicle body 402, a bottom driving shaft 403, bearing rollers 405, sound absorption sponges 401 and driving magnets 404;

[0040] The driving trolley 3 is composed of a driving vehicle body 301, a driving shaft 302, bearing rollers 303 and a driving magnet 304;

[0041] The special-shaped chute 2 includes a chute part 201, a special-shaped frame 202, a chute 203 and a mating surface 204; The special-shaped frame is designed as a curved surface with the same contour as the normal shape of the workpiece to be processed. As Figure 1 As shown, the special-shaped frame is designed as a flat type with the same contour as the machined surface 1001.

[0042] The driving tooling 1 includes a spindle fixing frame 101, a cross beam 102, a longitudinal beam 103, a longitudinal connecting shaft 104, a nylon slider 105 and a pulley 106;

[0043] One end of the spindle fixing frame 101 is connected to the spindle, and the other end is connected to the cross beam 102.

[0044] The connection method with the spindle includes but is not limited to Figure 2 The direct fixation shown, and it can also be connected to other parts of the machine tool such as the spindle or the spindle box through other methods, so that it has the same function as Figure 2 Shown. The connection method with the cross beam 102 includes but is not limited to Figure 2 The direct fixation shown, and it can also be connected to 102 through other structures.

[0045] The other end of the cross beam 102 is connected to the side wall of the longitudinal beam 103. The longitudinal beam is a hollow structure, and a group of sliders 105 are sleeved inside the longitudinal beam 103. The material can be nylon or other self-lubricating or auxiliary lubricating structures. The slider 105 is relatively fixed to the longitudinal beam 103.

[0046] The longitudinal connecting shaft 104 passes through the slider 105 and can slide inside the slider 105. This structure can make the whole system slide up and down along the Z axis, so that the following noise reduction system is not affected by the actions along the Z axis such as the tool lifting of the machine tool, and always fits the part to be processed.

[0047] The bottom end of the longitudinal connecting shaft 104 is fixed with a pulley 106.

[0048] The pulley 106 is embedded in the chute portion 203, enabling the pulley to move back and forth along the chute 201 in the Y-axis direction, so that the following driving trolley 3 is not affected by the movement of the machine tool along the Y-axis and always adheres to the workpiece to be machined.

[0049] The special-shaped frame 202 is mechanically connected to the chute 201 for easy disassembly and assembly. The special-shaped frame 202 is made into a curved surface with the same outer contour as the normal of the workpiece to be machined, so that several groups of driving trolleys 3 fixed on it can fit the workpiece without gaps. Multiple matching special-shaped frames can be made according to the workpiece to be machined to realize the generalization of the driving system. Only by replacing the special-shaped frame, the whole follow-up noise reduction and chip removal system can adapt to different long and large cavity parts (the relevant structures of this part of the driving tooling and special-shaped chute refer to the

Flexible Crawler Type Shock Absorbing and Pressing System 202121549668.3

[0050] The sound-absorbing trolley 4 is magnetically connected to the driving magnet 304 on the driving trolley 3 through the driving magnet 406 to obtain the driving force for moving along the cavity 1002. If the sound-absorbing trolley 4 is too far away from the driving trolley 3 and cannot obtain sufficient driving force, the side wall magnets 407 on the sound-absorbing trolley 4 can provide driving force for each other. The surfaces of the roller bearings 303 on the driving trolley and the roller bearings 405 on the sound-absorbing trolley are covered with rubber to increase friction and shock absorption.

[0051] The sound-absorbing sponges 401 at both ends of the sound-absorbing trolley 4 can effectively absorb the noise propagating along the cavity and can remove the chips generated by mechanical processing during the movement. The reason for making it a movable sound-absorbing system is that it can reduce vibration at the closest distance, shorten the distance of sound wave propagation, and effectively reduce noise. Although a sound-absorbing device can also be set at the end of the cavity, if the cavity is too long, the noise generated in the cavity is sufficient to affect the surrounding environment.

[0052] Other functions of the sound-absorbing trolley moving in the cavity can be changed by adding functional structures.

[0053] The working principle of the follow-up noise reduction and chip removal system described in this embodiment is: taking the processing problem of Figure 1 the floor as an example: the floor is a typical long and large cavity part. The lengths and processing parts of the floors of different vehicle models are different. Due to the characteristics of large thin-walled parts themselves, the processing noise is large and it affects the working environment. The above problems are solved by using the follow-up noise reduction and chip removal system.

[0054] When machining the workpiece part 1003 to be machined, the free movement of the machine tool spindle 11 in the XYZ directions will not affect the basic functions of the whole system, realizing real-time noise reduction for the machining of cavity workpieces; the longitudinal connecting shaft and the slider provide the movement and support in the Z direction, realize the movement and support in the Y direction through the special-shaped chute parts, and the driving trolley provides the movement in the X direction.

[0055] The sound-absorbing trolley 4 is inserted into the cavity 1002 and driven by the driving trolley 3 to move along the cavity, ensuring that the sound waves are absorbed at the closest position. The sound-absorbing trolley is a key component of the whole system, playing the role of sound absorption and noise reduction. It can slide in the cavity and also remove the aluminum chips in the cavity. It is inserted into the cavity in an arranged manner, completely blocking the cavity around the machining area with the sound-absorbing trolley. The main body of the sound-absorbing trolley is made of nylon or other sound-absorbing materials, with soft sound-absorbing materials such as foam plastic attached to both ends, which can completely block the cavity without leaving gaps. The sound-absorbing trolley slides on bearings with rubber rings, reducing the resistance of movement.

[0056] The driving of the sound-absorbing trolleys in the upper and lower cavities is provided by the mutual attraction of the rubidium magnets on the short sides, and the installation positions of the rubidium magnets on the inclined surfaces correspond to each other. The overall power in the cavity is provided by the driving trolley.

[0057] The sound-absorbing materials of the whole noise reduction and chip removal system can be replaced according to different production environments. Similarly, the shape of the sound-absorbing trolley can be specially designed according to the cavity. Customizing the sound-absorbing trolley according to the cavity can block the cavity without gaps.

Claims

1. Follow - type noise - reducing chip removal system, characterized in that: The system includes a driving tooling, a special-shaped chute assembly, a sound-absorbing trolley, and a driving trolley; The driving tooling is connected to the machine tool spindle and embedded in the chute of the special-shaped chute assembly; The driving trolley is fixed on the special-shaped frame of the special-shaped chute assembly; The sound-absorbing trolley assembly is magnetically connected to the driving trolley through a driving magnet to obtain a driving force for moving along the cavity of the workpiece to be machined; The sound-absorbing trolley is inserted into the cavity of the workpiece to be machined, and the driving trolley provides a driving force to move along the cavity, so as to absorb sound waves at the nearest position; The sound-absorbing trolley includes a sound-absorbing vehicle body, a bottom driving shaft, bearing rollers, sound-absorbing sponge, and a magnet; sound-absorbing sponges are fixed at both ends of the sound-absorbing vehicle body, a driving magnet is arranged on the sound-absorbing vehicle body, bearing rollers are arranged on the sound-absorbing vehicle body on both sides of the driving magnet, and the bearing rollers are connected through the bottom driving shaft; The sound-absorbing trolley further includes a side wall driving wheel shaft and a side wall magnet arranged on the side wall of the sound-absorbing vehicle body; The driving trolley includes a driving vehicle body, a driving magnet, a driving shaft, and bearing rollers; the driving magnet is installed on the driving vehicle body, and the driving magnet is magnetically connected to the driving magnet on the sound-absorbing trolley; bearing rollers are arranged on the driving vehicle body on both sides of the driving magnet, and the bearing rollers are connected through the driving shaft.

2. The follow-up noise reduction chip removal system according to claim 1, characterized in that: Rubber layers are covered on the surfaces of the bearing rollers on the sound-absorbing vehicle body and the bearing rollers on the driving vehicle body.

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