Bar surface oxide layer turning device

Abstract

The present invention belongs to the field of lathes, and proposes a device for turning the surface oxide layer of a bar, comprising a chassis and a lathe body, a tool slide, a tool feed and retraction component, a tool holder, a spindle component, and a set of three-jaw clamping chucks. The lathe body is provided with a three-jaw support chuck at one end away from the spindle component, and the three-jaw support chuck is provided on a support frame. There are two tool slides, namely a front slide and a rear slide, and a pair of plug-in pairs are provided on the opposite surfaces of the front slide and the rear slide. A tool screw is provided at the center of the pair of plug-in pairs, and a first motor is provided at the power input end of the tool screw. The chassis is provided with a discharge hole, and a variable diameter support feed component with a variable diameter feed opening is provided between the discharge hole and the spindle component. The present invention has a reasonable design, is easy to connect with automatic loading equipment, is conducive to improving the degree of automation in the workshop, is conducive to improving lathe processing efficiency, and can be applied to the processing and treatment of long bars, and is suitable for large-scale promotion.

Description

Technical Field

[0001] The invention belongs to the field of lathes, and in particular relates to a device for turning an oxide layer on the surface of a bar. Background Art

[0002] In machining workshops, many products are primarily made from bar stock, such as drive shafts, rods, bolts, and gears. Since bar stock is typically quite long, it's only cut into corresponding lengths during production in a specific workshop. Some workshops remove the surface oxide layer after the bar is cut into blanks during the specific machining process. However, for smaller blanks, the oxide layer needs to be removed before cutting to reduce damage to finishing tools and reduce tool changes.

[0003] At present, many lathes adopt a non-axial through-type design and include at least a spindle and a tailstock, such as the existing patent CN202222698494.8, which discloses a large through-hole heavy-cutting CNC lathe and the lathe disclosed in CN88206373.1. Such lathes have some problems when turning long bars. For example, if the long bars are fed by automatic equipment, they need to be manually clamped. In particular, the tailstock limits the automatic connection between the turning equipment and the automatic loading equipment, affecting the automation upgrade of the workshop.

[0004] Furthermore, many lathes are generally only equipped with a set of tool holders and slides for turning in the turning station due to the need for tool feeding of the tool holder and its slide. If long bars are processed, the processing cycle will be extended. The existing patent CN202220938147.5 discloses a bar surface oxide layer turning device, including a tool holder, a first turning mechanism and a second turning mechanism. The first turning mechanism includes a first tool holder and a first adjustment component; the second turning mechanism includes a second tool holder and a second adjustment component; the bar surface oxide layer turning device can improve processing efficiency. However, the turning device has certain deficiencies in automatic feed and retraction and tool feeding, so it also has a significant impact on the practical application of the device. Summary of the Invention

[0005] In response to the technical problems existing in the above-mentioned lathes, the present invention proposes a bar surface oxide layer turning device which has a reasonable design, is convenient for connecting with automatic loading equipment, is conducive to improving the degree of automation in the workshop, is conducive to improving the turning efficiency and is suitable for the processing and treatment of long bars.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: the rod surface oxide layer turning device provided by the present invention includes a chassis and a lathe body, the lathe body is provided with a tool slide, a tool feed and retract component and a tool holder that perform linear reciprocating motion along its length direction, the chassis is provided with a spindle component and a set of three-jaw clamping chucks, the lathe body is provided with a three-jaw support chuck at one end away from the spindle component, the three-jaw support chuck is arranged on a support frame, and the support frame is provided with a mounting port for installing the three-jaw support chuck and for feeding, the tool feed and retract component and the tool holder are distributed in pairs on the front and rear sides of the lathe body, There are two tool slides, namely the front slide and the rear slide. A pair of plug-in pairs are provided on the opposite surfaces of the front slide and the rear slide. A tool screw is provided at the center of the pair of plug-in pairs. A first motor is provided at the power input end of the tool screw. The first motor and the tool screw are used to drive the front slide and the rear slide to move towards and away from each other. A discharge hole is provided on the side of the chassis opposite to the position of the main shaft component. A variable diameter support material feeding component is provided between the discharge hole and the main shaft component. The variable diameter support material feeding component includes a variable diameter feeding port that is coaxial with the center of the discharge hole and the center of the main shaft component.

[0007] Preferably, a pair of guide rods are provided on both sides of the lathe body, and the inner sides of the front slide and the rear slide are slidably engaged with the guide rods. The plug-in pair includes a slot and an insert plate, one end of the slot is a blocked end and the other end is an open end, the insert plate is plugged into the slot and the length of the insert plate is less than the slot length of the slot, and a screw thread is provided at one end of the slot and the center of the insert plate, and the screw thread is engaged with the tool feed screw.

[0008] Preferably, the inner wall of the slot includes a C-shaped surface and straight planes extending horizontally from both sides of the C-shaped surface, the insert plate includes a cylindrical section cooperating with the C-shaped surface and a flat plate section cooperating with the straight plane, and a pressure plate is provided above the insert plate, and the bottom surface of the pressure plate is opposite to the top surface of the slot in an upper and lower manner.

[0009] Preferably, the three-jaw support chuck includes a chuck, an adjustment mechanism is provided inside the chuck, the end face of the chuck is provided with at least 3 evenly distributed radial openings, the radial openings are provided with claws that cooperate with the adjustment mechanism, and an eccentric section is provided at one end of the claw facing the center of the chuck, and the eccentric section is used to eccentrically support the workpiece.

[0010] Preferably, the front slide and the rear slide are both provided with self-cleaning components, which are used to clean the tool feed screw. The self-cleaning component includes a pipe interface inclined toward the interior of the plug-in pair, and a hose is provided at one end of the pipe interface, which is used to connect to the self-cleaning medium supply end.

[0011] Preferably, the variable diameter supporting feeding component includes a fixed tube docked with the discharge hole and the end of the main shaft component, the inner wall of the fixed tube is provided with three directional plates distributed in a circular array, the center of the directional plate is provided with a radial long hole, the radial long hole is provided with a clamping plate that moves radially toward the center of the fixed tube, the clamping plate is provided with at least two push rods at one end facing away from the center of the fixed tube, the outer side of the fixed tube is provided with a lifting ring, the top of the lifting ring is provided with a driving cylinder, the internal hinge of the lifting ring is provided with two symmetrically distributed brake arms, and a lifting hinge mechanism connected to the two brake arms is provided below the two brake arms, and the bottom of the lifting hinge mechanism is provided with a traction mechanism cooperating with the lifting ring.

[0012] Preferably, the brake arm includes a plurality of broken line segments connected in sequence and the connection from the head end to the end of the brake arm is Z-shaped. The end of the brake arm is provided with a brake guide hole, and the brake guide hole is slidably engaged with the lifting hinge mechanism. The lifting hinge mechanism includes a hinge seat, and the hinge seat is provided with a hinge shaft that can simultaneously move with the two brake arms. A lifting rod is provided at the bottom of the hinge seat, and a buffer spring is provided on the outside of the lifting rod.

[0013] Preferably, lifting guide rods are provided on both sides of the hinge seat, and the lifting guide rods cooperate with the through holes on the lifting ring.

[0014] Preferably, the traction mechanism includes two traction rods symmetrically connected to the lifting ring, a lever plate is provided at the bottom of the traction rod, a traction shaft hole is provided on the lever plate that slides with the traction rod, a fixed hinge is provided at the bottom of the lever plate, and the fixed hinge is connected to the chassis, the facing ends of the two lever plates are in upper and lower movable contact and the top of one of the lever plates is in movable contact with the lifting hinge mechanism.

[0015] Preferably, the radial long hole is a countersunk structure, and two rows of return springs connected to the radial long hole are provided on both sides of the clamping plate.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] 1. The device for turning the surface oxide layer of a bar provided by the present invention can be connected to the automatic loading equipment by adopting a feedable support frame and a three-jaw support chuck, and together with the three-jaw clamping chuck, it ensures the stability of the long bar during the turning process; and the chassis adopts an axial through-type design, which can allow the long bar to be conveyed out from the variable-diameter support feeding component, and is suitable for long bars of different diameters, which is beneficial to improving the connection performance of the equipment in the workshop and the processing efficiency of the long bars.

[0018] 2. The rod surface oxide layer turning device provided by the present invention can drive the front slide and the rear slide to move toward and away from each other through the first motor and the tool feed screw, and the feed and retract components, tool holder and tool carried by the two tool feed slides can complete the synchronous turning of long rods, which is beneficial to shortening the processing cycle and improving processing efficiency.

[0019] 3. The device is reasonably designed and easy to connect with automatic loading equipment, which is conducive to improving the degree of automation in the workshop, improving the machining efficiency and being applicable to the processing and handling of long bars, making it suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A perspective view of a device for turning an oxide layer on a bar surface provided in an embodiment;

[0022] Figure 2 A top view of a device for turning an oxide layer on a bar surface provided in an embodiment;

[0023] Figure 3 A front view of a device for turning an oxide layer on a bar surface provided in an embodiment;

[0024] Figure 4 This is a side view of the device for turning the oxide layer on the surface of the bar (without the support frame and the three-jaw support chuck);

[0025] Figure 5 A perspective view of a device for turning the oxide layer on the surface of a bar (without a support frame and a three-jaw support chuck);

[0026] Figure 6 for Figure 5 A magnified schematic diagram of the structure A in the middle;

[0027] Figure 7 for Figure 5 A magnified schematic diagram of structure B in the middle;

[0028] Figure 8 A side view of a variable diameter supporting and feeding component provided in an embodiment;

[0029] Figure 9 A three-dimensional diagram of a variable diameter supporting material feeding component provided in an embodiment;

[0030] Figure 10 A cross-sectional view of the variable diameter support material feeding component provided in the embodiment in the GG direction;

[0031] Figure 11 A schematic diagram of clamping a variable diameter support material feeding component provided in an embodiment;

[0032] Figure 12 A working diagram of a variable diameter support feeding component provided in an embodiment;

[0033] Figure 13 An axonometric view of the spindle assembly and three-jaw clamping chuck provided in the embodiment;

[0034] Figure 14 A side view of the spindle assembly and three-jaw clamping chuck provided for an embodiment;

[0035] In the above figures;

[0036] 1. Chassis; 2. Lathe body; 3. Tool slide; 31. Front slide; 32. Rear slide; 4. Tool feed and retraction components; 5. Tool holder; 6. Spindle components; 7. Three-jaw clamping chuck; 8. Three-jaw supporting chuck; 81. Chuck; 82. Radial opening; 83. Clamping jaws; 84. Eccentric section; 9. Support frame; 10. Insertion pair; 101. Slot; 1011. C-shaped surface; 1012. Straight plane; 102. Insert plate; 1021. Column section; 1022. Flat section; 103. Press plate; 11. Tool feed screw; 12. First motor; 13. Discharge hole; 14. Variable diameter support and feed component; 141. Variable diameter feed opening; 142. Fixed tube; 143. Orienting plate; 144, radial long hole; 145, clamping plate; 146, push rod; 147, lifting ring; 148, driving cylinder; 149, brake arm; 1410, lifting hinge mechanism; 14101, hinge seat; 14102, hinge shaft; 14103, lifting rod; 14104, buffer spring; 1411, traction mechanism; 14111, traction rod; 14112, lever plate; 14113, traction shaft hole; 14114, fixed hinge; 1412, brake guide hole; 1413, lifting guide rod; 1414, reset spring; 1415, roller; 15, self-cleaning component; 151, pipe interface; 152, hose; 16, long bar. DETAILED DESCRIPTION

[0037] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other unless they conflict. For the convenience of description, the words "upper", "lower", "left", and "right" appearing below only indicate the upper, lower, left, and right directions consistent with the drawings themselves and do not limit the structure.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Examples, such as Figures 1-14 As shown, the device for turning the surface oxide layer of a bar provided by the present invention comprises a machine case 1 and a lathe body 2. The lathe body 2 is provided with a tool slide 3 that makes linear reciprocating motion along its length, a tool feed and retraction component 4 and a tool holder 5. The tool holder 5 is installed with a tool for turning. The machine case 1 is provided with a spindle component 6 and a set of three-jaw clamping chucks 7. On this basis, the lathe body 2 provided by the present invention is provided with a three-jaw support chuck 8 at the end away from the spindle component 6. The three-jaw support chuck 8 is provided on a support frame 9. The support frame 9 is provided with a mounting port for installing the three-jaw support chuck 8 and for feeding. The tool feed and retraction component 4 and the tool holder 5 are distributed in pairs on the front and rear sides of the lathe body 2. There are two tool slides 3, namely a front slide 31 and a rear slide 32. A pair of plugs 10 is provided on the opposite surfaces of the front slide 31 and the rear slide 32. The center of the pair of plugs 10 is provided with A feed screw 11 is provided with a first motor 12 at the power input end of the feed screw 11. The first motor 12 and the feed screw 11 are used to drive the front slide 31 and the rear slide 32 to move toward and away from each other. A discharge hole 13 is provided on the side of the chassis 1 opposite to the position of the main shaft component 6. A variable diameter support feed component 14 is provided between the discharge hole 13 and the main shaft component 6. The variable diameter support feed component 14 includes a variable diameter feed port 141 which is coaxial with the center of the discharge hole 13 and the center of the main shaft component 6.

[0040] Specifically, the automatic loading equipment used in the workshop is an automatic feeder for long bars 16, which can deliver the long bars 16 to the support frame 9 and the three-jaw support chuck 8 by axial transmission. The three-jaw support chuck 8 can be used to support the tail end of the long bar 16, and the head end of the long bar 16 is clamped by the three-jaw clamping chuck 7. The rotation of the main shaft can drive the three-jaw clamping chuck 7 and the long bar 16 to rotate synchronously, and the three-jaw support chuck 8 remains in place to ensure the stability of the long bar 16 during the turning process. Furthermore, the chassis 1 adopts an axial through-type design. For the long bar 16 that has been turned, it can be ejected along the variable diameter support feeding component 14 during the process of the next long bar 16 being introduced. This allows the device to be connected with the automatic loading equipment and the automatic discharging equipment, thereby improving the connection performance of the equipment in the workshop and the processing efficiency of the long bar 16.

[0041] The variable diameter support feeding component 14 provided by the present invention always remains coaxial with the center of the main shaft component 6, which can ensure the coaxiality of the long bar 16 and the long bar 16 moving behind it, and provides a support surface that is adapted to the long bar 16 and has a longer length, which is conducive to improving the automatic feeding and unloading efficiency of the long bar 16. Furthermore, the present invention can drive the front slide 31 and the rear slide 32 to move toward and away from each other through the first motor 12 and the feed screw 11. The tool on the front slide 31 is biased toward the distal end of the main shaft component 6, while the tool on the rear slide 32 is biased toward the proximal end of the main shaft component 6. The feed and retract components 4, the tool holder 5, and the tools carried by the two feed slides 3 can complete the synchronous turning of the long bar 16 in the process of infinite proximity, which is conducive to shortening the processing cycle and improving processing efficiency. Therefore, the present invention is convenient for connecting automatic loading equipment, is conducive to improving the degree of automation in the workshop, is conducive to improving turning efficiency, and can be applied to the processing and treatment of long bars 16, and its comprehensive utilization rate is high.

[0042] like Figure 4-Figure 7 As shown, a pair of guide rods are provided on both sides of the lathe body 2. The inner sides of the front slide 31 and the rear slide 32 are slidably engaged with the guide rods. The insert pair 10 includes a slot 101 and an insert plate 102. One end of the slot 101 is blocked and the other end is open. The insert plate 102 is plugged into the slot 101 and its length is less than the slot length of the slot 101. One end of the slot 101 and the center of the insert plate 102 are provided with a screw thread, which engages with the tool feed screw 11. The guide rods cooperate with the tool feed slide 3 to improve the linearity and stability of the tool feed slide 3. Regarding the plug-in pair 10, its plug plate 102 can be fixedly connected to the front slide 31, and the slot 101 is integrated with the rear slide 32. The feed screw 11 has threads with opposite spiral directions at both ends. A set of feed screws 11 and a first motor 12 are used to drive the plug-in pair 10 to produce corresponding actions, thereby making the front slide 31 and the rear slide 32 move toward and away from each other. In addition, when the tools carried by the two feed slides 3 are infinitely close, due to the interlaced characteristics of the tools carried by the two and the final movement allowance provided by the slot 101 for the plug plate 102, the two sets of tools can fully complete the turning of the oxide layer of the long bar 16, thereby shortening the processing cycle of this work station.

[0043] In order to improve the mating stability of the two tool slides 3, the inner wall of the slot 101 provided by the present invention includes a C-shaped surface 1011 and straight planes 1012 extending horizontally from both sides of the C-shaped surface 1011. The insert plate 102 includes a cylindrical section 1021 that cooperates with the C-shaped surface 1011 and a flat section 1022 that cooperates with the straight plane 1012. A pressure plate 103 is provided above the insert plate 102, and the bottom surface of the pressure plate 103 is relatively matched with the top surface of the slot 101. In this way, during the process of infinitely approaching and mating the two tool slides 3, the slot 101 and the insert plate 102 can achieve a good fit, avoiding different degrees of jitter of the two sets of tools after infinitely approaching, and to a certain extent, ensuring the overall turning quality of the oxide layer on the surface of the long bar 16 by this equipment.

[0044] like Figure 1 As shown, in order to improve the supporting performance of the three-jaw support chuck 8 for the long bar 16, the three-jaw support chuck 8 provided by the present invention includes a chuck 81, an adjustment mechanism is provided inside the chuck 81, and the end face of the chuck 81 is provided with at least three evenly distributed radial openings 82, and the radial openings 82 are provided with claws 83 that cooperate with the adjustment mechanism. The end of the claw 83 facing the center of the chuck is provided with an eccentric section 84, and the eccentric section 84 is used to eccentrically support the workpiece. The three claws 83 use an eccentric support method to support the workpiece, so that adjacent claws form a pair of V-shaped supports, a total of three pairs of V-shaped supports. Compared with the design of radial direct clamping, the three-jaw support chuck 8 has a biased support function to ensure that the long bar 16 can complete effective and continuous rotation, thereby completing the corresponding turning operation.

[0045] In order to prevent the debris generated by turning from adhering to the feed screw 11, the front slide 31 and the rear slide 32 provided by the present invention are both provided with a self-cleaning assembly 15, which is used to clean the feed screw 11. The self-cleaning assembly 15 includes a pipe interface 151 inclined toward the interior of the plug-in pair 10, and a hose 152 is provided at one end of the pipe interface 151, which is used to connect to a self-cleaning medium supply end. The cleaning medium is supplied to the hose 152 through the self-cleaning medium supply end, and finally, the corresponding cleaning medium can be sprayed from the pipe interface 151 into the matching range of the feed screw 11, the plug plate, and the slot, thereby reducing the frequency of manual cleaning, thereby ensuring the real-time cleanliness of the transmission surface of the feed screw 11, and also ensuring the smoothness of the drive of the two feed slides 3 by the feed screw 11.

[0046] like Figures 8-12As shown, the variable diameter supporting feeding component 14 provided by the present invention includes a fixed tube 142 docked with the discharge hole 13 and the end of the main shaft component 6, the inner wall of the fixed tube 142 is provided with three directional plates 143 distributed in a circular array and integrated with the fixed tube, the center of the directional plate 143 is provided with a radial long hole 144, the radial long hole 144 is provided with a clamping plate 145 that moves radially toward the center of the fixed tube 142, the clamping plate 145 is provided with at least two push rods 146 at one end facing away from the center of the fixed tube 142, a lifting ring 147 is provided on the outside of the fixed tube 142, a driving cylinder 148 is provided on the top of the lifting ring 147, the internal hinge of the lifting ring 147 is provided with two symmetrically distributed brake arms 149, and a lifting hinge mechanism 1410 connected to the two brake arms 149 is provided below the two brake arms 149, and a traction mechanism 1411 cooperating with the lifting ring 147 is provided at the bottom of the lifting hinge mechanism 1410.

[0047] Specifically, the fixed tube 142 remains fixed in the chassis 1. The clamping opening created by the radial movement of the clamping plate 145 on the fixed plate is the variable-diameter feed opening 141, which is used to accommodate long bars 16 of different diameters. The drive cylinder 148 is used to drive the lifting ring 147 to move upward and downward. As the lifting ring 147 moves upward and downward, the real-time spacing between the lifting ring 147 and the fixed tube 142 changes, and this change is symmetrical. Furthermore, the downward movement of the lifting ring 147 directly causes the corresponding push rod 146 directly below it to move toward the center of the fixed tube 142. As the lifting ring 147 descends, the two brake arms 149, driven by the linkage of the lifting hinge mechanism 1410 and the traction mechanism 1411, can generate planar motion until the two brake arms 149 push the other two clamping plates 145 toward the center of the fixed tube 142. This achieves coaxial support for the long bar 16 and a long support span, effectively ensuring the continuity and stability of the long bar 16 from turning completion to discharge.

[0048] In order to improve the linkage performance of the brake arm 149 to the clamping plate 145 matched with it, the brake arm 149 provided by the present invention includes a plurality of broken line segments connected in sequence and the head end to the end end of the brake arm 149 is connected in a Z shape. The end of the brake arm 149 is provided with a brake guide hole 1412, and the brake guide hole 1412 is slidably matched with the lifting hinge mechanism 1410. The lifting hinge mechanism 1410 includes a hinge seat 14101, and the hinge seat 14101 is provided with a hinge shaft 14102 that can simultaneously cooperate with the two brake arms 149. A lifting rod 14103 is provided at the bottom of the hinge seat 14101, and a buffer spring 14104 is provided on the outside of the lifting rod 14103. Among them, when the lifting ring 147 is in its original position, the Z-shaped neck position of the brake arm 149 makes reasonable space for the push rod 146, so that the support diameter formed by the three clamping plates 145 is in a larger state; when the lifting ring 147 produces a downward movement, the traction mechanism 1411 will pull the lifting hinge mechanism 1410 to produce an upward movement, and the lifting rod 14103 together with the hinge seat 14101 and the hinge shaft 14102 rise, and the relative position of the hinge shaft 14102 and the brake guide hole 1412 changes, thereby, the neck position of the brake arm 149 produces a planar movement, and the trend of the planar movement is: to move toward a position tangent to the surface of the fixed tube 142 until the clamping plate 145 is supported on the side of the long bar 16, thereby ensuring the linkage between the brake arm 149 and the clamping plate 145.

[0049] In order to improve the lifting linearity of the lifting hinge mechanism 1410, the hinge seat 14101 provided by the present invention is provided with lifting guide rods 1413 on both sides. The lifting guide rods 1413 cooperate with the through holes on the lifting ring 147. The lifting linearity of the lifting hinge is controlled by the lifting guide rods 1413 and the lifting ring 147, which is conducive to ensuring the uniformity of the relative position changes between the hinge shaft 14102 and the two brake arms 149, thereby ensuring the synchronization performance of the clamping plate 145 and the support performance for the long bar 16.

[0050] In order to improve the immediacy of the action of the brake arm 149, the traction mechanism 1411 provided by the present invention includes two traction rods 14111 symmetrically connected to the lifting ring 147, and a lever plate 14112 is provided at the bottom of the traction rod 14111. The lever plate 14112 is provided with a traction shaft 14113 that slides with the traction rod 14111, and a fixed hinge 14114 is provided at the bottom of the lever plate 14112. The fixed hinge 14114 is connected to the chassis 1, and the facing ends of the two lever plates 14112 are in upper and lower movable contact and the top of one of the lever plates 14112 is in movable contact with the lifting hinge mechanism 1410. Among them, the two traction rods 14111 are synchronized with the lifting and lowering movements of the lifting ring 147. The bottom of the traction rod 14111 can generate relative movement with the traction shaft 14113 through an axial connection. The lever plate 14112 flips around the hinge center of the fixed hinge 14114 under the traction action of one end thereof, thereby lifting the bottom of the lifting rod 14103, thereby realizing real-time restraint of the brake arm 149, ensuring the instantaneous movement of the top clamping plate 145 and the two clamping plates 145 distributed in a V shape on both sides, thereby ensuring the automatic feeding and unloading performance of this equipment.

[0051] In order to ensure that the long bar 16 can be effectively fed into the variable diameter support feeding component 14, especially to prevent the top clamping plate 145 from blocking the transmission of the long bar 16, the radial long hole 144 provided by the present invention is a countersunk structure, and two rows of reset springs 1414 connected to the radial long hole 144 are provided on both sides of the clamping plate 145. By providing the reset spring 1414, the clamping plate 145 can be restored to its original position after being released from the braking action of the lifting ring 147 and the brake arm 149, thereby leaving a sufficient feeding port diameter for the long bar 16. Furthermore, the present invention also provides a plurality of rollers 1415 distributed along the length direction of the clamping plate 145 at the proximal end thereof, and the roller surface cooperates with the rod surface support of the long bar 16, thereby enabling the long bar 16 to maintain a stable and smooth axial transmission action in the variable diameter feeding port 141, which is conducive to improving the feeding and discharging performance of the device.

[0052] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A device for turning the surface oxide layer of a bar, comprising a machine case and a lathe body, wherein the lathe body is provided with a tool slide that performs linear reciprocating motion along its length, a tool feed and retraction component, and a tool holder, and the machine case is provided with a spindle component and a set of three-jaw clamping chucks, characterized in that: The tool holder is provided with a three-jaw supporting chuck at one end away from the main shaft component, and the three-jaw supporting chuck is arranged on the supporting frame, and the supporting frame is provided with a mounting opening for mounting the three-jaw supporting chuck and the feeding opening for the tool holder. The tool feed and retraction component and the tool holder are distributed in pairs at the front and rear sides of the lathe body. The tool slide has two, which are respectively a front slide and a rear slide. The opposite surfaces of the front slide and the rear slide are provided with a pair of plug-in pairs, and the center of the plug-in pairs is provided with a tool feed screw. The power input end of the tool feed screw is provided with a first motor, and the first motor and the tool feed screw are used to drive the front slide and the rear slide to move towards and back. The chassis is provided with a discharge hole on the side opposite to the position of the main shaft component, and a reducing support feeding component is provided between the discharge hole and the main shaft component, and the reducing support feeding component includes a reducing feeding opening which is coaxial with the center of the discharge hole and the center of the main shaft component. The variable diameter supporting feeding component includes a fixed tube docked with the end of the discharge hole and the main shaft component, the inner wall of the fixed tube is provided with three directional plates distributed in a circular array, the center of the directional plate is provided with a radial long hole, the radial long hole is provided with a clamping plate that moves radially toward the center of the fixed tube, the clamping plate is provided with at least two push rods at one end facing away from the center of the fixed tube, the outer side of the fixed tube is provided with a lifting ring, the top of the lifting ring is provided with a driving cylinder, the internal hinge of the lifting ring is provided with two symmetrically distributed brake arms, a lifting hinge mechanism connected to the two brake arms is provided below the two brake arms, and a traction mechanism cooperating with the lifting ring is provided at the bottom of the lifting hinge mechanism; The brake arm includes a plurality of folded line segments connected in sequence, and the connection from the head end to the end of the brake arm is Z-shaped. The end of the brake arm is provided with a brake guide hole, and the brake guide hole is slidably engaged with a lifting hinge mechanism. The lifting hinge mechanism includes a hinge seat, and the hinge seat is provided with a hinge shaft that is simultaneously movable with the two brake arms. A lifting rod is provided at the bottom of the hinge seat, and a buffer spring is provided on the outer side of the lifting rod. The traction mechanism includes two traction rods symmetrically connected to the lifting ring, a lever plate is provided at the bottom of the traction rod, a traction shaft hole is provided on the lever plate and slidingly cooperates with the traction rod, a fixed hinge is provided at the bottom of the lever plate, and the fixed hinge is connected to the chassis, the facing ends of the two lever plates are in upper and lower movable contact cooperation and the top of one of the lever plates is in movable contact with the lifting hinge mechanism.

2. The rod surface oxide layer turning device according to claim 1, characterized in that: A pair of guide rods are provided on both sides of the lathe body, and the inner sides of the front slide and the rear slide are slidably matched with the guide rods. The plug-in pair includes a slot and an insert plate, one end of the slot is a blocked end and the other end is an open end, the insert plate is plugged into the slot and the length of the insert plate is less than the slot length of the slot, and a screw thread is provided at one end of the slot and the center of the insert plate, and the screw thread is matched with the tool feed screw.

3. The rod surface oxide layer turning device according to claim 2, characterized in that: The inner wall of the slot includes a C-shaped surface and straight planes extending horizontally from both sides of the C-shaped surface. The inserting plate includes a cylindrical section that cooperates with the C-shaped surface and a flat section that cooperates with the straight plane. A pressure plate is provided above the inserting plate, and the bottom surface of the pressure plate is matched with the top surface of the slot in an upper and lower manner.

4. The rod surface oxide layer turning device according to claim 3, characterized in that: The three-jaw supporting chuck includes a chuck, an adjusting mechanism is provided inside the chuck, the end face of the chuck is provided with at least three evenly distributed radial openings, the radial openings are provided with claws that cooperate with the adjusting mechanism, and an eccentric section is provided at one end of the claw facing the center of the chuck, and the eccentric section is used to eccentrically support the workpiece.

5. The rod surface oxide layer turning device according to claim 1 or 4, characterized in that: The front slide and the rear slide are both provided with self-cleaning components, which are used to clean the feed screw. The self-cleaning components include a pipe interface inclined toward the interior of the plug-in pair, and a hose is provided at one end of the pipe interface, which is used to connect to the self-cleaning medium supply end.

6. The rod surface oxide layer turning device according to claim 1, characterized in that: Lifting guide rods are provided on both sides of the hinge seat, and the lifting guide rods are matched with through holes on the lifting ring.

7. The rod surface oxide layer turning device according to claim 1, characterized in that: The radial long hole is a countersunk structure, and two rows of return springs connected to the radial long hole are arranged on both sides of the clamping plate.

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