Machine tool for machining metal parts

Abstract

The invention belongs to the technical field of metal part machining, and particularly relates to a metal part machining machine tool which comprises a machine body shell, a cutting machine for forming a key groove in a stepped shaft is arranged above the machine body shell, and an auxiliary assembly for improving the machining reliability of the stepped shaft is arranged in a workbench. A first motor rotates to drive a push wheel to rotate, the push wheel drives a clamping plate to clamp the side face of a shaft, due to the fact that one side of a matching plate is inserted into a sliding clamping groove formed in the surface of the push wheel, the self-locking performance of the push wheel can be effectively improved, and the situation that the clamping plate is disengaged from the shaft is avoided; at the moment, the clamping plates can be pushed to move by different distances according to the pushing wheels of different sizes, so that the multiple sets of clamping plates can effectively clamp the shaft body, the stability of the shaft body can be improved when multiple sets of key grooves are formed in the stepped shaft, stress on each section of the shaft body of the stepped shaft is relieved, and the machining reliability and the qualified rate of parts can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal component processing, and specifically relates to a machine tool for metal component processing. Background Art

[0002] Machine tools for metal component processing generally belong to the category of metal cutting machine tools. Metal cutting machine tools are mechanical processing equipment that remove excess metal materials from workpieces through the relative movement between tools and workpieces, thereby obtaining the required shape, size, and surface accuracy. It is the most widely used type of machine tool in the machinery manufacturing industry and is mainly used for processing various metal components.

[0003] Among them, keyway processing is an essential link in the processing of shaft parts. Specific structures are formed through cutting processes such as milling and broaching to achieve mechanical connection and transmission functions. When keyways are processed on the surface of a stepped shaft, since the shaft body has multiple shaft segments with different diameters, when multiple keyways need to be opened on the shaft, the positions of the keyways will be distributed on different shaft segments. If a unified reference is not used, it may lead to errors in parallelism, symmetry, and spacing between keyways. To avoid inconsistent references, a double center-point fixture is usually used to position the stepped shaft at one time to avoid adjusting the position of the shaft and affecting the accuracy of opening multiple keyways.

[0004] Currently, in the existing technology, after using a double center-point fixture to position the stepped shaft, center holes need to be opened on both end faces of the shaft to facilitate clamping of the stepped shaft by the double center-point fixture. However, when keyways are opened on the shaft segments, the shaft is not only subjected to a cutting force perpendicular to the radial direction, but also according to the different lengths of the keyways, position adjustment is required when cutting the keyways radially, and at this time, the shaft is also subjected to an axial cutting force. Moreover, due to the different rigidities of different diameter segments of the stepped shaft, directly processing the shaft at this time may affect the processing reliability and the qualified rate of parts because the forces received by each shaft body segment of the stepped shaft are different. Therefore, the present invention provides a machine tool for metal component processing. Summary of the Invention

[0005] In order to make up for the deficiencies of the existing technology and solve at least one technical problem proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A machine tool for metal component processing according to the present invention includes a machine body housing. Above the machine body housing, there is a cutting machine for opening keyways on a stepped shaft. Inside the machine body housing, there is a double center-point fixture. Below the cutting machine, there is a workbench, and an auxiliary component for improving the processing reliability of the stepped shaft is configured inside the workbench;

[0007] The auxiliary component includes a first motor, the output end of the first motor is fixedly connected with a transmission shaft, the surface of the transmission shaft is fixedly connected with multiple sets of pushing wheels, sliding clamping grooves are formed on the surface of the pushing wheels, and a matching plate is slidably connected inside the sliding clamping grooves. Multiple sets of matching blocks that cooperate with the sliding clamping grooves are arranged on the surface of the matching plate close to the pushing wheels. One side of the matching plate is fixedly connected with a top column, and one end of the top column is fixedly connected with a clamping plate.

[0008] Preferably, the auxiliary component further includes a bidirectional motor. The two output ends of the bidirectional motor are fixedly connected with a positive and negative thread screw rod. A moving plate is threadedly connected to the surface of the positive and negative thread screw rod. The moving plate is slidably connected to the side surface of the workbench. The upper end of the moving plate is fixedly connected to the lower end of the first motor. A movement chamber is formed above the workbench. The top column moves inside the movement chamber. A moving groove is formed in the workbench at the position of the transmission shaft.

[0009] Preferably, a return spring is arranged at the connection position between the top column and the workbench. Multiple sets of the pushing wheels are arranged in different sizes. The pushing wheels are eccentrically arranged with respect to the transmission shaft. Through holes are formed inside the clamping plate, and through holes are formed at the bottom of the workbench.

[0010] Preferably, a sliding column is slidably connected inside the workbench. The upper end of the sliding column is fixedly connected with a top plate. A balance rod is arranged below the sliding column. A pin rod is rotatably connected to the middle position of the balance rod. Drainage bins are fixedly connected to both ends of the pin rod.

[0011] Preferably, a cleaning component for cleaning iron filings inside the workbench itself is configured inside the workbench. The cleaning component includes a pushing plate. The pushing plate slides inside the workbench. One end of the pushing plate is slidably clamped with a wiping plate. A fixed arc rod is fixedly connected to the side surface of the wiping plate. One end of the fixed arc rod is in sliding contact with a convex block. The convex block is fixedly connected with a fixed rod. The fixed rod is fixedly connected to the workbench.

[0012] Preferably, two sets of the fixed rod and the convex block are arranged inside the workbench. The two sets of convex blocks are arranged staggeredly. A return spring is arranged at the position where the pushing plate slides inside the wiping plate. The wiping plate is made of wear-resistant material.

[0013] Preferably, a control panel is installed in front of the body shell. Two sets of circulation pumps are arranged on both sides of the body shell. The double center-point clamp is slidably installed inside the body shell. Hydraulic telescopic plates are arranged on both sides below the workbench. The hydraulic telescopic plates are used to adjust the height of the workbench.

[0014] Preferably, a leak-proof membrane is provided between the workbench and the liquid discharge bin. The workbench is slidably connected to the body shell. The hydraulic telescopic plate is fixedly connected to the body shell. The interior of the liquid discharge bin is conically arranged.

[0015] Preferably, the push wheel rotates inside a through groove opened on the side of the workbench. The push wheel can drive the top column to push the clamping plate to clamp the side of the shaft body through cooperation with the cooperation plate. The clamping plates have different sizes on the sides of different shaft bodies.

[0016] Preferably, the middle position of the balance rod is rotatably connected to the liquid discharge bin. A sealing gasket is provided at the position where the pin rod rotates with the balance rod. An anti-slip pad is installed on the upper surface of the top plate. The pin rod is fixedly connected to the liquid discharge bin.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. For the machine tool for processing metal parts of the present invention, the first motor rotates to drive the push wheel to rotate. The push wheel can drive the clamping plate to clamp the side of the shaft. Since one side of the cooperation plate is inserted into the sliding card slot opened on the surface of the push wheel, the self-locking property of the push wheel can be effectively improved, avoiding the situation of the clamping plate falling off from the shaft. And because the diameter of each shaft body of the stepped shaft is different, at this time, according to push wheels of different sizes, the clamping plate can be pushed to move different distances, so that multiple groups of clamping plates can effectively clamp the shaft body, improving the stability of the shaft body when multiple key grooves are opened on the stepped shaft, reducing the force on each shaft body of the stepped shaft, and improving the reliability of processing and the qualified rate of parts.

[0019] 2. For the machine tool for processing metal parts of the present invention, the movement of the push plate drives the movement of two wiping plates. The wiping plates can wipe the inside of the workbench, avoiding the blockage of the liquid discharge holes inside the workbench by iron chips after cutting, improving the cleanliness during the processing of the stepped shaft. And by adjusting the working position of the auxiliary component, this machine tool can process stepped shafts of different sizes, improving the processing range of the stepped shaft and having high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a perspective view of the present invention;

[0022] Figure 2 is a schematic structural view of the present invention with part of the body shell removed;

[0023] Figure 3 is a schematic structural view of the chip cutter and the double center clamp in the present invention;

[0024] Figure 4It is a schematic structural diagram of the auxiliary component in the present invention;

[0025] Figure 5 It is a schematic partial structural diagram of the auxiliary component in the present invention;

[0026] Figure 6 It is in the present invention Figure 6 explosion diagram;

[0027] Figure 7 It is a schematic structural diagram of the cleaning component in the present invention;

[0028] Figure 8 It is a schematic structural diagram of the fixed rod and the convex block in the present invention;

[0029] Figure 9 It is a schematic structural diagram of the hydraulic telescopic plate and the liquid discharge bin in the present invention

[0030] In the figure: 1. Body shell; 2. Cutting machine; 3. Control panel; 4. Double center clamp; 5. Workbench; 6. Circulation pump; 7. Auxiliary component; 701. First motor; 702. Transmission shaft; 703. Pushing wheel; 704. Matching plate; 705. Jacking column; 706. Clamping plate; 707. Bidirectional motor; 708. Right and left hand thread lead screw; 709. Moving plate; 710. Movement bin; 711. Moving groove; 8. Liquid discharge bin; 9. Cleaning component; 901. Pushing plate; 902. Wiping plate; 903. Fixed arc rod; 904. Fixed rod; 905. Convex block; 10. Top plate; 11. Sliding column; 12. Pin rod; 13. Hydraulic telescopic plate; 14. Balance rod. Detailed implementation manners

[0031] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0032] As Figures 1 to 6 shown, a machine tool for processing metal parts according to an embodiment of the present invention includes a body shell 1, a cutting machine 2 for opening key grooves on a stepped shaft is arranged above the body shell 1, a double center clamp 4 is arranged inside the body shell 1, a workbench 5 is arranged below the cutting machine 2, and an auxiliary component 7 for improving the reliability of processing the stepped shaft is configured inside the workbench 5;

[0033] The auxiliary component 7 includes a first motor 701. The output end of the first motor 701 is fixedly connected to a transmission shaft 702. A plurality of push wheels 703 are fixedly connected to the surface of the transmission shaft 702. A sliding clamping groove is formed on the surface of the push wheel 703, and a mating plate 704 is slidably connected inside the sliding clamping groove. A plurality of mating blocks that cooperate with the sliding clamping groove are arranged on the surface of the mating plate 704 close to the push wheel 703. One side of the mating plate 704 is fixedly connected to a top column 705, and one end of the top column 705 is fixedly connected to a clamping plate 706.

[0034] The present invention considers that when the cutting machine 2 is started to process the keyway on the surface of the stepped shaft, the two-end center fixture 4 will clamp both ends of the shaft at this time to prevent the shaft from shifting in position during the processing. Although the two-end center fixture 4 can limit and fix the position of the stepped shaft at one time, since most of the shaft body is still in a suspended state at this time, when the keyway is opened on the shaft, the shaft will not only be subjected to a radial cutting force, but also due to the different lengths of the stepped shaft body, it may be necessary to open keyways of different lengths. At this time, the stepped shaft will also be subjected to the pulling force during axial chip removal. Therefore, in order to avoid uneven stress on the shaft during the processing of multiple keyways, resulting in shaft body fracture and other situations, first place the shaft inside the workbench 5. At this time, start the two-end center fixture 4 to clamp the shaft. After completely clamping both ends of the shaft, then start the first motor 701 to drive the transmission shaft 702 to rotate. The rotation of the transmission shaft 702 can drive a plurality of push wheels 703 to rotate. The rotation of the push wheels 703 will drive the top column 705 to slide inside the workbench 5 through the mating plate 704, so that the clamping plate 706 clamps the side of the shaft, which can effectively avoid the situation that one end loosens from one end of the two-end center fixture 4 when the shaft is subjected to an axial cutting force, and can effectively improve the stability of the shaft during keyway processing. And through the clamping of multiple clamping plates 706, it can offset to a certain extent the axial cutting force received by the cutting machine 2 when opening a longer keyway on the shaft, reducing the overall stress on the shaft body;

[0035] It should be noted that since a sliding clamping groove is formed on the surface of the push wheel 703, and mating blocks are arranged on the side of the mating plate 704 in contact with the push wheel 703. When the mating plate 704 is subjected to the thrust of the rotation of the push wheel 703, the mating blocks on one side of the mating plate 704 will always be inserted into the sliding clamping groove on the surface of the push wheel 703. Through the movement of multiple mating blocks inside the sliding clamping groove, the clamping stability of multiple clamping plates 706 on each section of the shaft body can be improved, thereby avoiding the position shift of the shaft when it is subjected to an axial cutting force and affecting the accuracy of the processing reference of multiple keyways, and effectively improving the reliability of the stepped shaft during the processing of multiple keyways;

[0036] It should be noted again that since the transmission shaft 702 is eccentrically arranged on the surface of the first motor 701, when the shaft body needs to be clamped, the push wheel 703 driven by the transmission shaft 702 will continuously apply a thrust to the mating plate 704, causing the clamping plate 706 to clamp and fix the position of the shaft body. Since the diameters of each section of the stepped shaft are different, when the clamping plate 706 does not clamp the shaft body, the section with a larger shaft body diameter will be closer to the position of the clamping plate 706. And at this time, there is a certain distance between the mating plate 704 at one end of the ejector pin 705 and the push wheel 703, which can effectively prevent the push wheel 703 from directly pushing the clamping plate 706 on one side of the mating plate 704 to continue applying force to clamp the shaft body when clamping the shaft body, and can avoid the stepped shaft from being subjected to a large clamping force, improving the stability of the shaft during keyway processing.

[0037] As Figures 5 to 7 shown, the auxiliary component 7 further includes a bidirectional motor 707. Two output ends of the bidirectional motor 707 are fixedly connected with a left - and - right - hand thread lead screw 708. The surface of the left - and - right - hand thread lead screw 708 is threadedly connected with a moving plate 709. The moving plate 709 is slidably connected to the side surface of the workbench 5. The upper end of the moving plate 709 is fixedly connected to the lower end of the first motor 701. A movement chamber 710 is opened above the workbench 5. The ejector pin 705 moves inside the movement chamber 710. The workbench 5 is provided with a moving groove 711 at the position of the transmission shaft 702.

[0038] The present invention also considers that when clamping a shaft with a relatively small overall size, due to the limitation of the size of the push wheel 703, the clamping plate 706 may not clamp the shaft body at this time. Therefore, when clamping stepped shafts with different gears, the bidirectional motor 707 is started to rotate, driving the left - and - right - hand thread lead screw 708 to rotate. The left - and - right - hand thread lead screw 708 drives the two moving plates 709 to move closer to one side of the bidirectional motor 707 through threaded transmission. At this time, the movement of the moving plate 709 can drive the first motor 701 to move, and the first motor 701 drives the push wheel 703 to move inside the movement chamber 710 through the transmission shaft 702. At this time, the transmission shaft 702 will slide inside the moving groove 711. After the position adjustment is completed, since there is a certain distance between the push wheel 703 and the mating plate 704 at the position with a larger shaft body diameter, the position where the distance between the push wheel 703 and the mating plate 704 is shorter will directly push the clamping plate 706 to move towards the stepped shaft, and the two with a longer distance between the push wheel 703 and the mating plate 704 will fit together. At this time, starting the first motor 701 to rotate can still make multiple clamping plates 706 clamp the side surface of the shaft body, which can be applicable to stepped shafts of different sizes;

[0039] It should be noted that after the position of the first motor 701 changes, at this time, the clamping plate 706 will be pushed by the pushing wheel 703 and move inside the workbench 5 towards the position of the stepped shaft in advance, which can effectively shorten the formation time when the clamping plate 706 clamps the shaft body during the subsequent driving of the first motor 701, and can quickly clamp the side of the shaft body. Moreover, since the left and right hand screw 708 and the moving plate 709 are in threaded connection, when the first motor 701 drives the pushing wheel 703 to rotate through the transmission shaft 702, the stability between the pushing wheel 703 and the matching plate 704 can be further improved at this time, achieving the self-locking function, thereby further improving the stability of clamping the side of the shaft body, and can slow down the axial cutting force generated on the stepped shaft during the machining of the cutting machine 2, further improving the stability during keyway machining.

[0040] As Figures 5 to 6 shown, a return spring is provided at the connection position between the ejector pin 705 and the workbench 5. Multiple sets of pushing wheels 703 are set in different sizes. The pushing wheel 703 and the transmission shaft 702 are eccentrically arranged. Through holes are provided inside the clamping plate 706, and through holes are provided at the bottom of the workbench 5.

[0041] During operation, since multiple sets of pushing wheels 703 are arranged on the surface of the transmission shaft 702 in different sizes, at this time, the pushing wheel 703 closest to the side with the largest diameter of the shaft body is set to the smallest size, and the side closest to the side with the smallest diameter of the shaft body is set to the largest size, which can further shorten the movement stroke when the clamping plate 706 clamps the side of the shaft body. Moreover, since a return spring is provided on the surface of the ejector pin 705 at this time, when the ejector pin 705 receives the thrust transmitted by the matching plate 704, the spring is in a stretched state at this time. When the bidirectional motor 707 drives the first motor 701 to move away from the stepped shaft, in order to improve the accuracy after the cooperation between the pushing wheel 703 and the matching plate 704, the spring contraction will drive the clamping plate 706 to reset at this time, so that one side of the clamping plate 706 is closely attached to the inner wall of the workbench 5, facilitating the next clamping work on the shaft body;

[0042] It should be noted that when the cutting machine 2 is performing keyway machining on the stepped shaft, at this time, cutting fluid will be used to cool the cutting tool and the machining position of the shaft body. And since the clamping plate 706 has clamped the side of the shaft body at this time, in order to facilitate the discharge of the cutting fluid, through holes are provided inside the clamping plate 706, which can facilitate the discharge of the cutting fluid and can guide the iron chips left after cutting, so that they quickly fall into the workbench 5, facilitating subsequent cleaning, and can effectively improve the reliability during keyway machining of the stepped shaft.

[0043] As Figure 7As shown in the figure, a sliding column 11 is slidably connected inside the workbench 5. The upper end of the sliding column 11 is fixedly connected to a top plate 10. A balance rod 14 is arranged below the sliding column 11. A pin rod 12 is rotatably connected to the middle position of the balance rod 14. Drainage bins 8 are fixedly connected to both ends of the pin rod 12.

[0044] During operation, before the double center-point clamp 4 clamps both ends of the stepped shaft, the shaft needs to be placed above the two top plates 10 first. Since the weights of both ends of the stepped shaft are different at this time, the two sliding columns 11 with different lengths support the shaft through the top plates 10, enabling the shaft to be in a horizontal state after being placed inside the workbench 5. This can improve the accuracy of subsequent positioning and clamping of the center holes at both ends of the shaft by the double center-point clamp 4, reduce the working time of the double center-point clamp 4, and improve work efficiency.

[0045] It should be noted that when the heavier end of the stepped shaft is placed above the shorter sliding column 11, due to the higher length of the other sliding column 11, the moment arm length is changed by using the support height difference between the two sliding columns 11 at this time, making the gravitational moments of the end with a larger shaft diameter and the end with a smaller shaft diameter equal, thereby achieving axial horizontal of the stepped shaft after placement, facilitating subsequent clamping and fixing of the stepped shaft. And when the shaft is placed, both sliding columns 11 will be stressed and press downward on the balance rod 14 at this time, and the balance rod 14 will rotate around the pin rod 12 under the force, thus facilitating axial adjustment of the stepped shaft and effectively improving the subsequent accurate clamping of the stepped shaft by the double center-point clamp 4.

[0046] As Figures 7 to 8 As shown in the figure, a cleaning component 9 for cleaning iron filings inside the workbench 5 itself is configured inside the workbench 5. The cleaning component 9 includes a push plate 901. The push plate 901 slides inside the workbench 5. A wiping plate 902 is slidably clamped at one end of the push plate 901. A fixed arc rod 903 is fixedly connected to the side of the wiping plate 902. One end of the fixed arc rod 903 is in sliding contact with a convex block 905. The convex block 905 is fixedly connected to a fixed rod 904. The fixed rod 904 is fixedly connected to the workbench 5.

[0047] During operation, to facilitate the discharge of the cutting fluid used during the cutting process of the cutting machine 2, by arranging a liquid discharge hole inside the workbench 5, not only can the cutting fluid be discharged, but also impurities such as iron filings can be filtered, enabling the cutting fluid to be recycled. When the keyway machining of the stepped shaft has not started, at this time, the double-tip fixture 4 will drive the wiping plate 902 to move towards the left and right sides of the workbench 5 through the push plate 901. At this time, the two wiping plates 902 are in a separated state. When the double-tip fixture 4 clamps the two ends of the shaft, at this time, the movement of the double-tip fixture 4 towards the workbench 5 will drive the wiping plate 902 to move through the push plate 901, making the wiping plate 902 in the middle position of the workbench 5. After the machining is completed, the double-tip fixture 4 will drive the wiping plate 902 to move outwards again, which can scrape iron filings, etc., to avoid blockage of the liquid discharge hole caused by iron filings, etc., effectively improve the stability of the workbench 5 during the machining process, and effectively improve the utilization rate of the cutting fluid and reduce the usage cost;

[0048] It should be noted that when the wiping plate 902 moves outwards, at this time, the wiping plate 902 will drive the fixed arc rod 903 to move. When the fixed arc rod 903 moves, one end will continuously contact the convex block 905, so that the wiping plate 902 will shake during the movement, enabling the wiping plate 902 to "rub" the position above the liquid discharge hole of the workbench 5 during the movement, which can further improve the effect of cleaning iron filings, and during the movement of the two wiping plates 902, it can also prevent the cutting fluid from remaining on the surface of the workbench 5, and can further clean the surface of the workbench 5.

[0049] As Figures 7 to 8 shown, two groups of fixed rods 904 and convex blocks 905 are arranged inside the workbench 5, and the two groups of convex blocks 905 are arranged in a staggered manner. A return spring is arranged at the position where the push plate 901 slides inside the wiping plate 902, and the wiping plate 902 is made of wear-resistant material.

[0050] During operation, when the wiping plate 902 drives the fixed arc rod 903 to contact the convex block 905, at this time, because the two groups of convex blocks 905 are arranged in a staggered manner, and at this time, the push plate 901 will, under the action of the return spring, make one end of the fixed arc rod 903 continuously contact the convex block 905, and can continuously shake, so as to improve the effect of cleaning iron filings and cutting fluid. It should be noted that after the splint 706 clamps the shaft, the through hole inside it can improve the effect of the cutting fluid flowing down from the surface of the shaft. At this time, the splint 706 can filter the flowing cutting fluid, so that when the cutting fluid flows out from the through hole, the iron filings will be isolated by the splint 706 and quickly fall into the inside of the workbench 5, which is convenient for the wiping plate 902 to collect it. The collected iron filings will be located at the positions of the two ends of the workbench 5 where there are no liquid discharge holes, which is convenient for subsequent cleaning of the inside of the workbench 5 and improves the cleanliness of the workbench 5 during and after use.

[0051] As Figures 1 to 3 and Figure 9 shown, a control panel 3 is installed in front of the body shell 1, two groups of circulating pumps 6 are arranged on both sides of the body shell 1, a double-ended center fixture 4 is slidably installed inside the body shell 1, and hydraulic telescopic plates 13 are arranged on both sides below the workbench 5. The hydraulic telescopic plates 13 are used to adjust the height of the workbench 5.

[0052] During operation, when the waste liquid after use is discharged from the drain hole opened inside the workbench 5, it will fall into the drain bin 8 for collection. When the cutting fluid falls into the drain bin 8, at this time, starting the hydraulic telescopic plate 13 can recycle the cutting fluid inside the drain bin 8, thereby improving the utilization rate of the cutting fluid and reducing the use cost. It should be noted that when machining a keyway on a stepped shaft with a relatively small overall size, at this time, due to the fixed height of the top plate 10, when the shaft is placed inside the workbench 5, even after leveling, the center hole will be offset from the clamping end of the double-ended center fixture 4, resulting in the inability to clamp the shaft. Therefore, by setting the hydraulic telescopic plate 13, it can drive the workbench 5 and the shaft inside it to move upward, so that the double-ended center fixture 4 can clamp stepped shafts of different sizes, effectively improving the practicability of this machine tool.

[0053] As Figure 9 shown, a leak-proof film is arranged between the drain bin 8 and the workbench 5. The workbench 5 is slidably connected to the body shell 1, the hydraulic telescopic plate 13 is fixedly connected to the body shell 1, and the inside of the drain bin 8 is conically arranged.

[0054] During operation, when the cutting fluid flows from the drain hole inside the workbench 5 into the drain bin 8, at this time, due to the conical arrangement inside the drain bin 8, that is, lower on both sides and higher in the middle, the liquid will flow to both sides inside the drain bin 8 under the action of gravity, facilitating the hydraulic telescopic plate 13 to extract and process the cutting fluid. And because a leak-proof film is arranged between the workbench 5 and the drain bin 8, when the workbench 5 moves upward as a whole, at this time, the cutting fluid discharged from the position of the drain hole will also be isolated by the leak-proof film, which can avoid the leakage of the cutting fluid after discharge and further improve the utilization rate of the cutting fluid.

[0055] As Figures 4 to 6 shown, the push wheel 703 rotates inside the through groove opened on the side of the workbench 5. The push wheel 703 can make the ejector pin 705 push the clamping plate 706 to clamp the side of the shaft body through cooperation with the mating plate 704. The clamping plates 706 are set with different side dimensions for different shaft bodies.

[0056] During operation, when the push wheel 703 rotates, it will rotate inside the through groove opened on the side of the workbench 5, and because the size of the through groove is large, when the push wheel 703 moves inside the motion bin 710, the push wheel 703 will not contact the through groove, which can effectively improve the movement smoothness of the push wheel 703 before and after adjustment. It should be noted that since the diameter and length of each section of the stepped shaft are different, the splint 706 on the side with a larger shaft diameter is set longer at this time. After clamping the side of the shaft body, the contact area between the splint 706 and the shaft body can be effectively increased, thereby improving the stability of clamping the shaft body.

[0057] like Figures 1 to 3 and Figure 7 As shown, the middle position of the balance rod 14 is rotatably connected to the drainage bin 8, a sealing gasket is provided at the position where the balance rod 14 rotates, an anti-slip pad is installed on the upper surface of the top plate 10, and the pin rod 12 is fixedly connected to the drainage bin 8.

[0058] During operation, when the top plate 10 above the two groups of sliding columns 11 of different lengths supports the stepped shaft, at this time, since the upper surface of the top plate 10 is in close contact with the lower part of the shaft, when the cutting machine 2 processes a longer keyway on the shaft, at this time, with the support of the two groups of sliding columns 11, the radial cutting force generated by the cutting machine 2 when processing the keyway can be slowed down and offset to a certain extent, and the shoulder fracture of the stepped shaft after being subjected to a large vertical radial force can be avoided, which can further improve the reliability of the keyway processing on the shaft;

[0059] It should be noted that by arranging a top plate 10 above the sliding column 11, the top plate 10 is arranged in an arc shape. When the shaft is subjected to vertical radial chip force, the top plate 10 can distribute the force to a certain extent, so that the balance bar 14 under the sliding column 11 is evenly stressed, which can improve the stability of the double center clamp 4 after clamping the shaft, thereby improving the benchmark uniformity of keyway processing, and improving the yield and reliability of step shaft processing.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. 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, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A machine tool for processing metal parts, characterized in that: It includes a machine body shell, above which there is a cutting machine for keyway cutting of a stepped shaft, inside which there is a double center fixture, below the cutting machine there is a workbench, and inside the workbench there is an auxiliary component configured to improve the machining reliability of the stepped shaft; The auxiliary component includes a first motor, the output end of which is fixedly connected with a transmission shaft, on the surface of which there are fixedly connected multiple groups of push wheels, on the surface of which there are sliding chucks, and inside the sliding chucks there is a mating plate slidably connected. On the side surface of the mating plate close to the push wheel, there are multiple groups of mating blocks cooperating with the sliding chucks. One side of the mating plate is fixedly connected with a top column, and one end of the top column is fixedly connected with a clamping plate.

2. The machine tool for processing metal parts according to claim 1, characterized in that: The auxiliary component further includes a bidirectional motor, the two output ends of which are fixedly connected with a left - and - right - hand threaded lead screw, on the surface of which there is a moving plate threadedly connected. The moving plate is slidably connected to the side surface of the workbench, and the upper end of the moving plate is fixedly connected to the lower end of the first motor. Above the workbench, there is a movement chamber, and the top column moves inside the movement chamber. At the position of the transmission shaft on the workbench, there is a moving slot.

3. A machine tool for processing metal parts according to claim 1, wherein: At the connection position between the top column and the workbench, there is a return spring. Multiple groups of the push wheels are set in different sizes and are eccentrically arranged with respect to the transmission shaft. Through holes are opened inside the clamping plate, and through holes are opened at the bottom of the workbench.

4. A machine tool for processing metal parts according to claim 1, characterized in that: Inside the workbench, there is a sliding column slidably connected. The upper end of the sliding column is fixedly connected with a top plate, and below the sliding column there is a balance rod. At the middle position of the balance rod, there is a pin rod rotatably connected, and at both ends of the pin rod, there are liquid discharge chambers fixedly connected.

5. A machine tool for processing metal parts according to claim 1, characterized in that: Inside the workbench, there is a cleaning component configured to clean iron filings inside itself. The cleaning component includes a push plate that slides inside the workbench. One end of the push plate is slidably clamped with a wiping plate. On the side surface of the wiping plate, there is a fixed arc rod, and one end of the fixed arc rod slidably contacts a convex block. The convex block is fixedly connected with a fixed rod, and the fixed rod is fixedly connected with the workbench.

6. The machine tool for processing metal parts according to claim 5, characterized in that: There are two groups of the fixed rod and the convex block inside the workbench, and the two groups of convex blocks are arranged staggeredly. At the position where the push plate slides inside the wiping plate, there is a return spring. The wiping plate is made of wear - resistant material.

7. A machine tool for processing metal parts according to claim 1, characterized in that: In front of the machine body shell, there is a control panel installed. On both sides of the machine body shell, there are two groups of circulating pumps. The double center fixture is slidably installed inside the machine body shell. On both sides below the workbench, there are hydraulic telescopic plates used to adjust the height of the workbench.

8. A machine tool for processing metal parts according to claim 7, characterized in that: There is a leak - proof film between the workbench and the liquid discharge chamber. The workbench is slidably connected with the machine body shell. The hydraulic telescopic plate is fixedly connected with the machine body shell. The inside of the liquid discharge chamber is tapered.

9. The machine tool for processing metal parts according to claim 1, characterized in that: The push wheel rotates inside the through - slot opened on the side surface of the workbench. Through cooperation with the mating plate, the push wheel can make the top column push the clamping plate to clamp the side surface of the shaft body. The sizes of the clamping plates located on the side surfaces of different shaft bodies are different.

10. A machine tool for processing metal parts according to claim 4, characterized in that: The middle position of the balance rod is rotatably connected to the liquid discharge chamber. A sealing washer is provided at the position where the pin rod rotates with the balance rod. An anti-slip pad is installed on the upper surface of the top plate. The pin rod is fixedly connected to the liquid discharge chamber.

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