Feeding mechanism of centerless lathe and centerless lathe

Abstract

The utility model provides a feeding mechanism of a centerless lathe and the centerless lathe, and relates to the technical field of centerless lathes. The feeding mechanism is located on one side of the feeding direction of a cutting mechanism of the centerless lathe, the feeding mechanism comprises a first frame body, a plurality of conveying roller sets and a plurality of first driving devices, the conveying roller sets are arranged on the first frame body at intervals in the first direction, and the conveying roller sets are rotationally connected with the first frame body; the fixed end of the first driving device is fixedly connected with the first frame body, and the output end of the first driving device is fixedly connected with the conveying roller set so as to drive the conveying roller set to rotate. According to the feeding mechanism, when the large end of the workpiece is close to the conveying roller set, the conveying roller set can be driven by the first driving device to rotate and topple in the first direction so as to avoid the large end of the special-shaped workpiece, and feeding conveying or discharging output of the special-shaped workpiece with the large end is achieved; and therefore, the straight cylinder section of the special-shaped workpiece is machined through the cutting mechanism, and the type range of machined workpieces of the centerless lathe is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of centerless lathe, specifically relates to a centerless lathe's feeding mechanism and centerless lathe. BACKGROUND

[0002] Centerless lathe is a kind of high-efficiency machine tool specially used for processing cylindrical metal materials, mainly used for removing the defects such as oxidation layer, crack of workpiece surface, and producing smooth surface, accurate size and concentric bright round bar, with the advantages of high efficiency, high precision, simple operation, safe use etc. However, limited to the structure layout of centerless lathe feeding mechanism, it is only applicable to the feeding of workpiece with straight cylinder structure, and cannot be compatible with the feeding of special-shaped workpiece with large end head structure (such as flange, boss, large end head etc. on the end of straight cylinder section). SUMMARY

[0003] In view of the problems existing in the prior art, the utility model provides a centerless lathe's feeding mechanism and centerless lathe to improve the technical problem that the feeding mechanism of existing centerless lathe cannot be compatible with the feeding of workpiece with special-shaped structure.

[0004] To achieve the above object and other related purposes, the utility model provides a centerless lathe's feeding mechanism, the feeding mechanism is located at the side of the cutting mechanism feeding direction of the centerless lathe, and is characterized by comprising a first frame body, a plurality of conveying roller groups and a plurality of first driving devices, a plurality of the conveying roller groups are spaced apart and arranged on the first frame body along the first direction, and a plurality of the conveying roller groups are rotatably connected with the first frame body;The fixed end of the first driving device is fixedly connected with the first frame body, and the output end of the first driving device is fixedly connected with the conveying roller group to drive the conveying roller group to rotate.

[0005] In an embodiment of the utility model, the conveying roller group comprises a roller, a first support, a second support and a connecting plate fixedly arranged between the first support and the second support, the first support and the second support are rotatably installed on the first frame body, one end of the roller shaft of the roller is rotatably connected with the first support, the other end of the roller shaft extends from the second support and is rotatably connected with the second support, and the connecting plate is fixedly connected with the output end of the driving device.

[0006] In an embodiment of the utility model, the conveying roller group further comprises a third support, a fourth support and a rotating shaft, the third support and the fourth support are fixedly connected with the first frame body respectively, the first support, the second support, the third support and the fourth support are all provided with through holes for the rotating shaft to pass through, and the rotating shaft sequentially passes through the third support, the first support, the second support and the fourth support and extends from the fourth support.

[0007] In an embodiment of the utility model, the feeding mechanism further includes a second driving device and a chain transmission device, the second driving device is fixedly arranged on the first frame body, and the second driving device is connected with the plurality of conveying roller groups through the chain transmission device to transmit power of the second driving device to the plurality of conveying roller groups.

[0008] In an embodiment of the utility model, the chain transmission device includes a driving sprocket, a first driven sprocket and a second driven sprocket, the driving sprocket is fixedly arranged on the output end of the second driving device, the first driven sprocket is fixedly arranged on the end of the rotating shaft protruding from the fourth support, and the second driven sprocket is fixedly arranged on the end of the roller shaft protruding from the second support, the driving sprocket and the first driven sprocket are connected through a first chain, adjacent first driven sprockets are connected through a second chain, and the first driven sprocket and the second driven sprocket are connected through a third chain.

[0009] In an embodiment of the utility model, the feeding mechanism further includes a detector, and the detector is arranged on both sides of the conveying roller group along a first direction.

[0010] In an embodiment of the utility model, the detector is an infrared distance sensor.

[0011] In an embodiment of the utility model, the roller is a V-shaped roller.

[0012] In an embodiment of the utility model, the feeding mechanism further includes a pinch mechanism, the pinch mechanism includes a second frame body, a plurality of first clamping roller groups, a plurality of second clamping roller groups and a plurality of third driving devices, the second frame body is located between the first frame body and the cutting mechanism, the plurality of first clamping roller groups are arranged on the second frame body at intervals along a first direction, the plurality of second clamping roller groups are arranged on the second frame body at intervals along the first direction, and the first clamping roller groups and the second clamping roller groups are oppositely arranged along a second direction, and the plurality of third driving devices are connected with the plurality of first clamping roller groups and the plurality of second clamping roller groups respectively to drive the first clamping roller groups and the second clamping roller groups to move up and down along the second direction.

[0013] The utility model provides a centerless lathe, the centerless lathe includes the feeding mechanism described above.

[0014] The feeding mechanism of the centerless lathe is characterized in that a plurality of conveying roller groups are arranged on the first frame body in a first direction at intervals, and the conveying roller groups can rotate under the driving of the first driving device, so that the conveying roller groups avoid the large end head of the special-shaped workpiece when the large end head of the workpiece approaches the conveying roller groups, the feeding and conveying or discharging and output of the special-shaped workpiece with the large end head are realized, the machining of the straight cylinder section of the special-shaped workpiece is realized through the cutting mechanism of the centerless lathe, the machining workpiece type range of the centerless lathe is widened, the machining efficiency of the straight cylinder section of the special-shaped workpiece is improved, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other embodiments can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0016] Figure 1 It is an installation schematic view of the feeding mechanism in an embodiment of the present application.

[0017] Figure 2 It is a structural schematic view of the feeding mechanism in an embodiment of the present application.

[0018] Figure 3 It is a cooperation schematic view of the conveying roller group and the chain transmission device in an embodiment of the feeding mechanism of the present application.

[0019] Figure 4 It is a schematic view of the second chain in a vertical state of the conveying roller group in an embodiment of the feeding mechanism of the present application.

[0020] Figure 5 It is a schematic view of the second chain in a rotating state of the conveying roller group in an embodiment of the feeding mechanism of the present application.

[0021] Figure 6 It is a structural schematic view of the first driven sprocket in an embodiment of the feeding mechanism of the present application.

[0022] Figure 7 It is a structural schematic view of the clamping and conveying mechanism in an embodiment of the feeding mechanism of the present application.

[0023] Figure 8 It is a structural schematic view of the centerless lathe in an embodiment of the present application.

[0024] Element number explanation:

[0025] 10, feeding mechanism; 110, first frame body; 120, conveying roller set; 121, roller; 122, first support; 123, second support; 124, connecting plate; 125, third support; 126, fourth support; 127, rotating shaft; 130, first driving device; 140, second driving device; 150, chain transmission device; 151, driving sprocket; 152, first driven sprocket; 153, second driven sprocket; 154, first chain; 155, second chain; 156, third chain; 160, detector; 210, clamping mechanism; 211, second frame body; 212, first clamping roller set; 213, second clamping roller set; 214, third driving device; 20, cutting mechanism; 30, bed body; 40, withdrawing mechanism; 50, discharging mechanism; 60, blanking mechanism. DETAILED DESCRIPTION

[0026] The above and other advantages and effects of the present application will become readily apparent to those of ordinary skill in the art from the following description in conjunction with the accompanying drawings. The present application can also be applied or implemented in different ways, and the details in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the embodiments and features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present application are used to describe specific embodiments, but are not intended to limit the scope of protection of the present application. The test methods in the following embodiments are not specified, and are generally performed under conventional conditions or under conditions recommended by the manufacturers.

[0027] When the embodiments give numerical ranges, it should be understood that, unless otherwise specified by the present application, each numerical range has two endpoints and any numerical value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present application are consistent with the understanding of the prior art by those skilled in the art and the description of the present application. Any method, device and material of the prior art similar or equivalent to the method, device and material of the embodiments of the present application can be used to implement the present application.

[0028] It should be understood that the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, and are not intended to limit the scope of the present application. The change or adjustment of the relative relationship without substantial change of the technical content is also regarded as the scope of the present application.

[0029] Please refer to Figure 1 and Figure 2The utility model provides a kind of feeding mechanism 10 of centerless lathe, which comprises a first frame body 110, a plurality of conveying roller groups 120 and a plurality of first driving devices 130. The plurality of conveying roller groups 120 are arranged on the first frame body 110 in a first direction, and the plurality of conveying roller groups 120 are rotatably connected to the first frame body 110. The fixed ends of the plurality of first driving devices 130 are fixedly connected to the first frame body 110, and the output ends of the first driving devices 130 are fixedly connected to the conveying roller groups 120. Here, the first direction is the feeding direction of the workpiece, i.e., the X-axis direction. The feeding mechanism 10 of the present application can rotate the conveying roller groups 120 under the drive of the first driving devices 130 and dump them in the first direction when the large end of the workpiece approaches the conveying roller groups 120, to avoid the large end of the special-shaped workpiece, realize the feeding and conveying or discharging of the special-shaped workpiece with a large end, and then realize the machining of the straight cylinder section of the special-shaped workpiece through the cutting mechanism 20 of the centerless lathe, thereby widening the range of workpieces that can be machined by the centerless lathe, improving the machining efficiency of the straight cylinder section of the special-shaped workpiece, and reducing production costs.

[0030] Please refer to Figure 2 and Figure 3 The plurality of first driving devices 130 correspond one-to-one to the plurality of conveying roller groups 120, i.e., each conveying roller group 120 corresponds to one first driving device 130. In an embodiment, the conveying roller group 120 comprises a roller 121, a first bracket 122, a second bracket 123, and a connecting plate 124 fixedly arranged between the first bracket 122 and the second bracket 123. The first bracket 122 and the second bracket 123 are rotatably mounted on the first frame body 110. The roller shaft of the roller 121 is rotatably connected to the first bracket 122 at one end, and the other end of the roller shaft extends out of the second bracket 123 and is rotatably connected to the second bracket 123. The connecting plate 124 is fixedly connected to the output end of the first driving device 130. When the large end of the workpiece approaches the roller 121, the output end of the first driving device 130 retracts and drives the connecting plate 124 fixedly connected thereto, which in turn drives the first bracket 122 and the second bracket 123 to rotate, so that the height of the conveying roller group 120 is lower than the height of the large end of the workpiece, ensuring the smooth passage of the large end of the workpiece. After the large end of the workpiece passes through, the output end of the first driving device 130 extends out and pushes the first bracket 122 and the second bracket 123 to reset the conveying roller group 120. The type of the first driving device 130 is not limited here, and the pushing device can be any linear driving device, such as a pneumatic cylinder, an oil cylinder, a hydraulic cylinder, or a transmission device, etc. For example, the first driving device 130 is selected as an oil cylinder. In this embodiment, the roller 121 is a V-shaped roller, which can effectively prevent the workpiece from deviating from the center axis during machining due to its special design. Due to its V-shaped structure, the workpiece is stably supported in the V-shaped groove, reducing displacement caused by vibration or cutting force, ensuring the machining stability of the centerless lathe, and reducing machining errors caused by workpiece deviation.

[0031] Please see Figure 2 In one embodiment, the number and spacing of the conveyor roller groups 120 are not limited, as long as they can support the workpiece and ensure feeding stability. The source of power for the displacement of the workpiece on the conveyor roller groups 120 is not limited; it can be manually or with the aid of an external thrust device to push the workpiece into the cutting mechanism 20 for operation, or the workpiece can be fed through the self-transporting function of the conveyor roller groups 120. In this embodiment, the feeding mechanism 10 also includes a second drive device 140 and a chain drive device 150. The second drive device 140 is fixedly mounted on the first frame 110 and is connected to multiple conveyor roller groups 120 via the chain drive device 150 to transmit power from the second drive device 140 to the multiple conveyor roller groups 120.

[0032] Please see Figures 2 to 5 In one embodiment, the conveying roller assembly 120 further includes a third support 125, a fourth support 126, and a rotating shaft 127. The third support 125 and the fourth support 126 are respectively fixedly connected to the first frame 110. The first support 122, the second support 123, the third support 125, and the fourth support 126 are all provided with through holes for the rotating shaft 127 to pass through. The rotating shaft 127 passes through the third support 125, the first support 122, the second support 123, and the fourth support 126 in sequence and extends out from the fourth support 126. The chain drive device 150 includes a driving sprocket 151, a first driven sprocket 152, and a second driven sprocket 153. The driving sprocket 151 is fixedly disposed at the output end of the second drive device 140, the first driven sprocket 152 is fixedly disposed at the end of the rotating shaft 127 that extends out of the fourth support 126, and the second driven sprocket 153 is fixedly disposed at the end of the roller shaft that extends out of the second support 123. The driving sprocket 151 is connected to the first driven sprocket 152 via a first chain 154, adjacent first driven sprockets 152 are connected via a second chain 155, and the first driven sprocket 152 and the second driven sprocket 153 are connected via a third chain 156. In this embodiment, limiting devices (not shown in the figure) for preventing the rotating shaft 127 from moving axially are also provided on the third bracket 125 and the fourth bracket 126.

[0033] Please see Figures 2 to 5In one embodiment, the second driving device 140 is a drive motor. The output shaft of the drive motor rotates, causing the drive sprocket 151 to rotate. The drive sprocket 151 drives the first driven sprocket 152 connected to it to rotate via the first chain 154. The first driven sprocket 152 connected to the drive sprocket 151 drives the adjacent first driven sprocket 152 via the second chain 155. Multiple first driven sprockets 152 are sequentially driven by their adjacent first driven sprockets 152. The first driven sprocket 152 drives the corresponding second driven sprocket 153 via the third chain 156. The second driven sprocket 153 drives the corresponding roller 121. The rotation of the roller 121 causes the workpiece to move. For example, when the workpiece is being loaded, the output end of the second driving device 140 rotates clockwise to transfer the workpiece to the cutting mechanism 20. After processing, the output end of the second driving device 140 rotates counterclockwise to transfer the workpiece to the side away from the cutting mechanism 20. Here, the correspondence between the rotation direction of the output end of the second drive device 140 and the workpiece movement direction is not limited, and can be adjusted according to the relative position of the feeding mechanism 10 and the cutting mechanism 20. When the conveyor roller group 120 rotates, the third chain 156 moves in an arc relative to the first driven sprocket 152. During the rotation of the conveyor roller group 120, the transmission mechanism of the sprocket and chain remains unchanged. The second drive device 140 simultaneously drives multiple conveyor roller groups 120, that is, multiple conveyor roller groups 120 are driven by the same drive device, which reduces the manufacturing difficulty and lowers the cost.

[0034] Please see Figure 2 In one embodiment, the feeding mechanism 10 further includes a detector 160. Along the first direction, the detector 160 is disposed on both sides of the conveyor roller group 120 for detecting the position of the large end of the workpiece. The installation position of the detector 160 is not limited here, as long as it can promptly detect whether the large end of the workpiece is approaching or moving away, and transmit a signal to the control system of the centerless lathe, thereby controlling the conveyor roller group 120 at the corresponding position to tilt to avoid the large end of the workpiece. For example, the detector 160 is mounted on the first frame 110. The type of detector 160 is also not limited here; for example, the detector 160 can be a limit switch or a distance sensor. Specifically, in this embodiment, the detector 160 uses an infrared distance sensor. Multiple infrared distance sensors are fixedly mounted on the first frame 110 and located on both sides of a single conveyor roller group 120. The workpiece is located on the detection path of the infrared distance sensor. By measuring and recording the change in the distance between the detector 160 and the outer surface of the workpiece, it is determined whether the large end of the workpiece is approaching, thereby controlling the rotation of the conveyor roller group 120 at the corresponding position. It should be noted that infrared ranging sensors or limit switches have wide applications in the industry, their structure and working principle are well known in the industry, and they can be obtained through general commercial means, so they will not be elaborated on here.

[0035] Please see Figure 1 and Figure 6In one embodiment, the feeding mechanism 10 further includes a clamping mechanism 210, which is located between the conveying roller group 120 and the cutting mechanism 20. The loading table realizes the loading and feeding functions of the centerless lathe on the workpiece. The clamping mechanism 210 is installed on the bed 30 to realize the clamping and feeding functions of the centerless lathe on the workpiece, ensuring the stability of the workpiece when the cutting mechanism 20 is cutting. Specifically, the clamping mechanism 210 includes a second frame 211, a first clamping roller group 212, and a second clamping roller group 213. The second frame 211 is located between the first frame 110 and the cutting mechanism 20. Specifically, the second frame 211 is fixed on the bed 30 and close to the feed port of the cutting mechanism 20. The second frame 211 can be a portal frame structure or a plate structure with an opening. The size of the opening is sufficient for the large end of the workpiece to pass through. Multiple first clamping roller groups 212 are spaced apart on the second frame 211 along a first direction, and multiple second clamping roller groups 213 are also spaced apart on the second frame 211 along the first direction. The first clamping roller groups 212 and second clamping roller groups 213 have the same structure and are positioned opposite each other along a second direction, denoted as the Y-axis, i.e., the vertical direction. The distance between the first clamping roller groups 212 and second clamping roller groups 213 forms the passage for the workpiece. Multiple third driving devices 214 are positioned at corresponding locations on the second frame 211. These third driving devices 214 are respectively connected to the multiple first clamping roller groups 212 and the multiple second clamping roller groups 213 to drive the first clamping roller groups 212 and the second clamping roller groups 213 to move up and down along the second direction. Specifically, in this embodiment, there are three sets of first clamping roller groups 212, three sets of second clamping roller groups 213, and six sets of third driving devices 214, corresponding to the number of first clamping roller groups 212 and second clamping roller groups 213. For example, the third driving device 214 is a hydraulic cylinder. Increasing the travel of multiple sets of first clamping roller groups 212 and multiple sets of second clamping roller groups 213, along with the application of the third driving device 214, allows for adjustment of the distance between the first clamping roller groups 212 and second clamping roller groups 213. This facilitates the passage of the large end of the workpiece, allowing the straight cylindrical section of the workpiece to penetrate as deeply as possible into the cutting mechanism 20, minimizing the length of the unpeeled portion of the straight cylindrical section of the workpiece. Simultaneously, the arrangement of multiple first clamping roller groups 212 and second clamping roller groups 213 ensures a secure clamping effect on the workpiece. It should be noted that this embodiment only improves the number of the first clamping roller group 212 and the second clamping roller group 213, and the displacement movement of the first clamping roller group 212 and the second clamping roller group 213 in the second direction through the third driving device 214. The specific structure and installation method of the first clamping roller group 212 and the second clamping roller group 213 can refer to the design of the existing centerless lathe clamping mechanism 210, and are not improvements of the technical solution of this embodiment, so they will not be described in detail here.

[0036] Please seeFigure 7 This utility model also provides a centerless lathe, which includes the feeding mechanism 10 described in any of the above embodiments. It should be noted that the centerless lathe of this utility model also includes conventional components of existing centerless lathes such as a cutting mechanism 20, a bed 30, an extraction mechanism 40, a discharge mechanism 50, and a blanking mechanism 60. Their structures and functions are well known in the industry and will not be described in detail here. In this embodiment, the extraction mechanism 40 and the discharge mechanism 50 can blank the machined cylindrical workpiece. Therefore, the centerless lathe of this application can be used for machining both cylindrical workpieces and irregularly shaped workpieces with large ends, thus broadening the range of workpiece types that the centerless lathe can process.

[0037] The feeding mechanism of this centerless lathe comprises multiple conveying roller groups spaced apart along a first direction on a first frame. These conveying roller groups rotate under the drive of a first driving device. When the large end of a workpiece approaches the conveying roller group, the conveying roller group avoids the large end of the irregularly shaped workpiece, thus enabling the loading and unloading of irregularly shaped workpieces with large ends. The cutting mechanism of the centerless lathe then processes the straight cylindrical section of the irregularly shaped workpiece, broadening the range of workpiece types that the centerless lathe can process, while simultaneously improving the processing efficiency of the straight cylindrical section of irregularly shaped workpieces and reducing production costs. Therefore, this invention effectively overcomes some practical problems in the prior art and thus has high utilization value and practical significance.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A feeding mechanism of a centerless lathe, which is located on the side of the feeding direction of the cutting mechanism of the centerless lathe, characterized in that, The feeding mechanism comprises: a first frame body; a plurality of conveying roller groups, which are arranged at intervals along a first direction on the first frame body and are rotationally connected with the first frame body; a plurality of first driving devices, the fixed ends of which are fixedly connected with the first frame body, and the output ends of which are fixedly connected with the conveying roller groups to drive the conveying roller groups to rotate.

2. The feed mechanism of claim 1, wherein, The conveying roller group comprises a roller, a first support, a second support and a connecting plate fixedly arranged between the first support and the second support, the first support and the second support are rotationally mounted on the first frame body, one end of the roller shaft is rotationally connected with the first support, the other end of the roller shaft extends from the second support and is rotationally connected with the second support, and the connecting plate is fixedly connected with the output end of the driving device.

3. The feed mechanism of claim 2, wherein, The conveying roller group further comprises a third support, a fourth support and a rotating shaft, the third support and the fourth support are respectively fixedly connected with the first frame body, the first support, the second support, the third support and the fourth support are all provided with through holes for the rotating shaft to pass through, and the rotating shaft sequentially passes through the third support, the first support, the second support and the fourth support and extends from the fourth support.

4. The feed mechanism of claim 3, wherein, The feeding mechanism further comprises a second driving device and a chain transmission device, the second driving device is fixedly arranged on the first frame body, and the second driving device is connected with the plurality of conveying roller groups through the chain transmission device to transmit the power of the second driving device to the plurality of conveying roller groups.

5. The feed mechanism of claim 4, wherein, The chain transmission device comprises a driving sprocket, a first driven sprocket and a second driven sprocket, the driving sprocket is fixedly arranged on the output end of the second driving device, the first driven sprocket is fixedly arranged on one end of the rotating shaft extending out of the fourth support, the second driven sprocket is fixedly arranged on one end of the roller shaft extending out of the second support, the driving sprocket and the first driven sprocket are connected through a first chain, adjacent first driven sprockets are connected through a second chain, and the first driven sprocket and the second driven sprocket are connected through a third chain.

6. The feed mechanism of claim 1, wherein, The feeding mechanism further comprises a detector, which is arranged on both sides of the conveying roller group along the first direction.

7. The feed mechanism of claim 6, wherein, The detector is an infrared distance sensor.

8. The feed mechanism of claim 3, wherein, The roller is a V-shaped roller.

9. The feed mechanism of claim 1, wherein, The feeding mechanism further comprises a pinch mechanism, which comprises: a second frame body between the first frame body and the cutting mechanism; a plurality of first clamping roller groups, which are arranged at intervals along a first direction on the second frame body; a plurality of second clamping roller groups, which are arranged at intervals along a first direction on the second frame body, and the first clamping roller groups and the second clamping roller groups are oppositely arranged along a second direction; a plurality of third driving devices, which are respectively connected with the plurality of first clamping roller groups and the plurality of second clamping roller groups to drive the first clamping roller groups and the second clamping roller groups to move up and down along the second direction.

10. A centerless lathe characterized by comprising: A feeding mechanism comprising any one of claims 1 to 9.

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