Double-end lathe

Abstract

The invention relates to the technical field of lathe design, and discloses a double-end lathe. Comprising a base, a positioning mechanism, a feeding unit, a machining unit and a discharging unit, the machining unit comprises a main shaft clamping base, a first tool apron, a second tool apron, a first displacement mechanism and a second displacement mechanism. The main shaft clamping base is used for clamping a bar or a pipe and driving the bar or the pipe to rotate around the axis of the main shaft clamping base. The first tool apron is installed on one side of the main shaft clamping base through a first displacement mechanism, the second tool apron is installed on the other side of the main shaft clamping base through a second displacement mechanism, and the feeding unit is used for picking up single bars or pipes, pushing the single bars or pipes to the main shaft clamping base for machining and pushing the single bars or pipes to the discharging unit after machining is completed. The discharging unit is used for receiving the single bar or pipe pushed by the feeding unit and pushing the single bar or pipe to the next procedure. By means of the device, automatic feeding and discharging, one-time clamping and double-end synchronous machining of a single bar or pipe can be achieved, and high concentricity and high efficiency can be achieved.

Description

Technical Field

[0001] This invention relates to the field of lathe design technology, specifically a double-headed lathe. Background Technology

[0002] In the automotive, motorcycle, and hydraulic / pneumatic parts manufacturing industries, a large number of parts, such as pistons, bushings, valve cores, and connecting rods, require machining at both ends. The traditional machining process for these parts typically involves using a single-head lathe to machine one end, then turning and clamping the workpiece to machine the other end. The disadvantages of this method are obvious: the double clamping inevitably introduces positioning errors, making it difficult to guarantee the coaxiality and concentricity of the two ends, affecting the assembly accuracy and performance of the product; simultaneously, the two clamping and machining operations also lead to low production efficiency and increased labor costs.

[0003] Although double-headed lathes exist on the market, the loading and unloading processes of existing double-headed lathes are mostly done manually or semi-automatically, which cannot match the high-efficiency double-end processing cycle and has become a bottleneck restricting overall production efficiency.

[0004] Therefore, there is an urgent need in this field for a double-end turning machine to solve the accuracy problem caused by secondary clamping and the efficiency problem caused by manual loading and unloading. Summary of the Invention

[0005] The purpose of this invention is to provide a double-head lathe to solve the problems in the prior art, such as the difficulty in ensuring the accuracy of both ends during secondary clamping of existing single-head lathes and the low efficiency caused by manual or semi-automatic loading and unloading of existing double-head lathes.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A double-head lathe, comprising:

[0008] The base, the positioning mechanism, and the feeding unit, the processing unit and the unloading unit installed on the base are arranged sequentially along the first direction;

[0009] The machining unit includes a spindle clamp, a first tool holder, a second tool holder, a first displacement mechanism, and a second displacement mechanism. The spindle clamp is mounted on a base and is used to clamp a bar or tube and drive the bar or tube to rotate around its axis. The first tool holder is mounted on one side of the spindle clamp via the first displacement mechanism, and the second tool holder is mounted on the other side of the spindle clamp via the second displacement mechanism, so that the first tool holder, spindle clamp, and second tool holder are arranged sequentially along a first direction. The first displacement mechanism is used to drive the first tool holder to move along a first direction and a second direction; the second displacement mechanism is used to drive the second tool holder to move along either the first direction or the second direction.

[0010] The feeding unit is used to pick up a single bar or tube, push it to the spindle clamp for processing, and push it to the unloading unit after processing is completed.

[0011] The unloading unit is used to receive a single bar or tube pushed by the loading unit and push it to the next process.

[0012] The positioning mechanism is located between the spindle clamp and the unloading unit, and the positioning mechanism can move along the third direction. When the positioning mechanism is in the first position, the positioning mechanism limits the extension length of the single bar or tube pushed by the loading unit to the spindle clamp. When the positioning mechanism is in the second position, the loading unit can push the processed single bar or tube to the unloading unit. The first direction, the second direction and the third direction are perpendicular to each other.

[0013] Furthermore, the positioning mechanism includes a base, an adjusting mounting seat, a material-blocking cylinder, a material-blocking slider, a material-blocking slide rail, and a material-blocking positioning block; the base is mounted on the upper end face of the spindle clamp and extends along a first direction; the adjusting mounting seat is mounted on the base and its position can be adjusted along the first direction; the material-blocking cylinder is distributed along a third direction and mounted on the top of the adjusting mounting seat; the output end of the material-blocking cylinder is connected to the material-blocking positioning block to drive the material-blocking positioning block to rise and fall along a third direction; the adjusting mounting seat is also provided with a material-blocking slide rail distributed along a third direction; the material-blocking positioning block is connected to the material-blocking slide rail through the material-blocking slider to improve the stability of the material-blocking positioning block.

[0014] Furthermore, the first displacement mechanism includes an X1-axis moving mechanism, a Y1-axis moving mechanism, and a first slide; the X1-axis moving mechanism extends along a first direction, the first slide is mounted on the output end of the X1-axis moving mechanism and can drive the first slide to move along the first direction, the Y1-axis moving mechanism is mounted on the first slide, and the first tool holder is mounted on the output end of the Y1-axis moving mechanism and is used to drive the first tool holder to move along a second direction.

[0015] Furthermore, the second displacement mechanism includes an X2-axis moving mechanism, a Y2-axis moving mechanism, and a second slide. The X2-axis moving mechanism extends along a first direction, and the second slide is mounted on the output end of the X2-axis moving mechanism, which can drive the second slide to move along the first direction. The Y2-axis moving mechanism is mounted on the second slide, and the second tool holder is mounted on the output end of the Y2-axis moving mechanism, which is used to drive the second tool holder to move along a second direction.

[0016] Furthermore, the feeding unit includes a first frame; the first frame is fixed to the base;

[0017] The material hopper is mounted on a first frame and includes a storage chute, a guide plate, and a loading guide chute. Along a second direction, the first end of the storage chute is the feeding side, and the second end of the storage chute is connected to the first end of the loading guide chute via the guide plate. The second end of the loading guide chute is the discharge side. The first end of the storage chute is higher than the second end of the material chute, allowing bars or tubes to automatically roll from the first end to the second end. Similarly, the first end of the loading guide chute is higher than the second end of the material chute, allowing bars or tubes to automatically roll from the first end to the second end of the material chute. The end of the guide plate connected to the loading guide chute is higher than the end connected to the storage chute, forming a stepped section at the connection between the loading guide chute and the storage chute. The stepped section has multiple top holes spaced apart along the first direction.

[0018] The material lifting mechanism is set on the first frame and located below the step. The material lifting mechanism is used to lift a single bar or tube through the material lifting hole and cooperate with the guide plate to transfer it from the storage slide to the loading guide slide.

[0019] Feeding mechanism; the feeding mechanism and the main shaft clamp are arranged along a first direction, the feeding mechanism is installed on the first frame and close to the discharge side of the feeding guide slide; used to receive the bar or tube rolling down the feeding guide slide and feed it to the main shaft clamp along the first direction.

[0020] Furthermore, the material-electroding mechanism includes a material-distributing rod and a material-electroding cylinder; the material-distributing rod includes a support and multiple material-electroding blocks; the multiple material-electroding blocks are spaced apart on the support along a first direction, and each material-electroding block corresponds to a material-electroding hole; the material-electroding cylinder is mounted on a first frame, and the output end of the material-electroding cylinder is connected to the support to drive the material-electroding blocks through the material-electroding holes.

[0021] Furthermore, the contact surface between the top material block and the single bar or tube is an inclined plane, so that the top material block lifts the single bar or tube to the feeding guide slide and then rolls automatically.

[0022] Furthermore, it also includes a height adjustment mechanism; the height adjustment mechanism includes a first lifting cylinder and a first base plate, the first lifting cylinder is disposed on the first frame, the output end of the first lifting cylinder is connected to the first base plate, and the output end of the first lifting cylinder can reciprocate along a third direction, and the feeding mechanism is installed on the first base plate.

[0023] Furthermore, it also includes an overall moving mechanism, which comprises a second base plate, a slide rail, a slide block, a first lifting connecting plate, and a moving drive mechanism; the slide rail is mounted on the side of the first base plate away from the feeding mechanism and extends along a first direction; the slide block is movably mounted on the slide rail; the output end of the first lifting cylinder is connected to the slide block through the first lifting connecting plate; the second base plate is mounted on the side of the first lifting connecting plate away from the slide block; the moving drive mechanism is mounted on the second base plate and its output end is connected to the first base plate, and can reciprocate along the first direction.

[0024] Furthermore, the first lifting connecting plate includes a first vertical section distributed along a third direction and a first horizontal section distributed along a second direction. The first vertical section and the first horizontal section are integrated. The first vertical section is used to connect to the output end of the first lifting cylinder. The upper end surface of the first horizontal section is used to fix the slide block, and the lower end surface of the first horizontal section is used to fix the second base plate.

[0025] Furthermore, the feeding mechanism includes a first receiving groove, a pushing drive assembly, and a pushing rod; the first receiving groove is disposed on the first frame and extends along a first direction; the pushing drive assembly is disposed on the first frame and located above the first receiving groove, and the output end of the pushing drive assembly is connected to the pushing rod for driving the pushing rod to reciprocate along the first direction, so as to feed the single bar or tube in the first receiving groove out along the first direction.

[0026] Furthermore, the first receiving trough includes a receiving plate and a V-shaped material trough, with the receiving plate disposed on both sides of the opening end of the material trough.

[0027] Furthermore, it also includes a baffle plate, which is disposed on a receiving plate away from the feeding guide slide, to prevent the bar or tube from falling out of the trough.

[0028] Furthermore, it also includes a discharge guide block; the discharge guide block is disposed in the receiving groove, and the discharge guide block has a guide hole extending through in the first direction to ensure that the bar or tube is fed out in the first direction.

[0029] Furthermore, the pusher drive assembly includes a pusher rodless cylinder, the cylinder body of which is mounted on the first base plate and located above the pusher rod. The cylinder body of the pusher rodless cylinder extends along a first direction, and the slider of the pusher rodless cylinder is connected to the pusher rod to push the pusher rod to reciprocate along the first direction.

[0030] Furthermore, the push rod includes a limiting block, a connecting rod, a push block, and a push spring; wherein, the limiting block, the connecting rod, and the push block are connected in sequence, the outer diameter of the limiting block and the outer diameter of the push block are both larger than the connecting rod, a positioning block extending towards the push rod is provided on the slider of the push rodless cylinder, the positioning block has a through hole that matches the outer diameter of the connecting rod, the connecting rod is disposed in the through hole, the push block is close to the main shaft clamp, the limiting block is away from the main shaft clamp, the push spring is sleeved on the outer periphery of the connecting rod, and the first end of the push spring abuts against the push block, and the other end of the push spring abuts against the positioning block.

[0031] Furthermore, the feeding unit includes:

[0032] The second frame is fixed to the base;

[0033] The material feeding chute is set on the second frame along the second direction. The first end of the material feeding chute is the receiving side, and the second end of the material feeding chute is the feeding side. The first end of the material feeding chute is higher than the second end of the material feeding chute, so that the bar or tube can automatically roll along the first end of the material feeding chute to the second end of the material feeding chute.

[0034] A receiving mechanism is provided, mounted on a second frame and arranged along a first direction with the main shaft clamp. The receiving mechanism includes a support base, a second receiving groove, a guide rail assembly, a mounting assembly, a reset assembly, a tilting assembly, and a receiving drive assembly. The guide rail assembly is mounted on the support base, and its axis extends along the first direction. Both the mounting assembly and the reset assembly are slidably mounted on the guide rail assembly, and the mounting assembly can rotate around the axis of the guide rail assembly. The output end of the receiving drive mechanism can reciprocate along the first direction, and the output of the receiving drive mechanism... The output end is used to drive the mounting component and the reset component to slide synchronously along the guide rail component; the tilting component is located away from the main shaft clamp, and the second receiving groove is connected to the mounting component so that the second receiving groove can follow the mounting component to reciprocate along the guide rail component and can rotate around the axis of the guide rail component; when the second receiving groove contacts the tilting component, the tilting component pushes the second receiving groove to fall to the discharge slide, so that the bar or tube in the second receiving groove rolls down the receiving groove to the discharge slide; when the second receiving groove leaves the tilting component, the reset component can drive the second receiving groove to return to the correct position.

[0035] Furthermore, the tipping assembly includes a tipping guide block and a top tipping component; the top tipping component is disposed on the side of the support base away from the main shaft clamp, the tipping guide block is fixed to the second receiving groove, and the tipping guide block is located on the side of the second receiving groove away from the discharge slide and the main shaft clamp, the top tipping component cooperates with the tipping guide block to make the second receiving groove tip over to the discharge slide.

[0036] Furthermore, the top-flipping component includes a rotatable rolling element, and the flipping guide block has a first end away from the main shaft clamp and a second end close to the main shaft clamp, as well as a flipping guide surface facing the rolling element. The distance between the flipping guide surface and the second receiving groove gradually increases from the first end to the second end of the flipping guide block. When the rolling element rolls from the first end to the second end of the flipping guide block, the rolling element can push the second receiving groove over. When the rolling element rolls from the second end to the first end of the flipping guide block, the reset component gradually drives the second receiving groove to return to its correct position.

[0037] Furthermore, the rolling element also includes a fixing block, which is installed on the side of the support base away from the main shaft clamp, and the rolling element is rotatably mounted on the top of the fixing block. The rolling element is a bearing, and the outer surface of the bearing can roll into contact with the tilting guide block, thereby applying a thrust to the tilting guide block and causing the second receiving groove to tilt towards the material chute.

[0038] Furthermore, the guide rail assembly includes a first guide rail and a second guide rail; the first guide rail and the second guide rail are arranged along a second direction and their axes both extend along a first direction; the first guide rail and the second guide rail are both mounted on a support base; the first guide rail is close to the unloading slide, and the second guide rail is away from the unloading slide; the reset assembly is connected to the first guide rail and the second guide rail; and the mounting assembly is connected to the first guide rail.

[0039] Furthermore, the reset assembly includes a first sliding sleeve, a second sliding sleeve, a reset base, a reset support block, and a reset spring; the first sliding sleeve is sleeved on a first guide rail, the second sliding sleeve is sleeved on a second guide rail, the reset base connects the first sliding sleeve and the second sliding sleeve, the material receiving drive assembly is connected to the reset base, the reset support block is installed on the reset base and close to the second guide rail, the first end of the reset spring is connected to the reset base, and the second end of the reset spring is connected to the second material receiving groove to pull the second material receiving groove to contact the reset support block.

[0040] Furthermore, the mounting assembly includes a first mounting block, a second mounting block, and a third sliding sleeve. The third sliding sleeve is fitted onto the first guide rail and is slidable along the first guide rail and rotatable about the axis of the first guide rail. The first mounting block is fixed to the third sliding sleeve, and the second mounting block is fitted onto the first sliding sleeve and is rotatable about the axis of the first guide rail. Both the first and second mounting blocks are used to mount the second receiving groove. The first, second, and third sliding sleeves are all existing stroke-type linear bearings, which can slide linearly along the guide rail and rotate about the axis of the guide rail.

[0041] Furthermore, the second receiving groove includes a first material plate and a second material plate. A first end of the first material plate is connected to a first end of the second material plate, and a second end of the first material plate is positioned away from the second material plate, so that the cross-section of the second receiving groove is V-shaped. The first material plate is close to the discharge slide and is connected to a first mounting block and a second mounting block. The second material plate is away from the discharge slide and is used to connect the tipping assembly and the reset assembly. The reset support block has an inclined surface that mates with the second material plate, so that when the second material plate contacts the reset support block, the second receiving groove returns to its correct position, preventing the rods or tubes inside the second receiving groove from coming out. To accommodate the shape and movement of the second receiving groove, the fixing block is installed obliquely on the side of the support base away from the processing device.

[0042] Furthermore, it also includes a lifting mechanism, which includes a second lifting cylinder. The output end of the second lifting cylinder can reciprocate along a third direction. The output end of the second lifting cylinder is connected to a support base to adjust the height of the second receiving trough along a third direction.

[0043] Furthermore, it also includes a second lifting connecting plate, which includes a second vertical section distributed along a third direction and a second horizontal section distributed along a second direction. The second vertical section and the second horizontal section are integrated. The first vertical section is used to connect to the output end of the second lifting cylinder, and the second horizontal section is used to connect to the support base.

[0044] Furthermore, the material receiving drive assembly is a rodless material receiving cylinder, the cylinder body of which is mounted on a support base and extends along a first direction, and the slider of which is connected to a reset base.

[0045] The present invention has the following advantages over the prior art:

[0046] 1. The double-head lathe of the present invention includes a positioning mechanism, a loading unit, a machining unit, and an unloading unit mounted on a base; wherein, the machining unit includes a spindle holder, a first tool holder, a second tool holder, a first displacement mechanism, and a second displacement mechanism; the spindle holder is used to clamp bars or tubes and drive the bars or tubes to rotate around their axes; the first tool holder is mounted on one side of the spindle holder through the first displacement mechanism, which can drive the first tool holder to move along a first direction and a second direction; the second tool holder is mounted on the other side of the spindle holder through the second displacement mechanism, which can drive the second tool holder to move along the first direction and a second direction; by means of the above device, double-end machining can be achieved in one clamping, completely eliminating secondary clamping errors, resulting in high workpiece concentricity and dimensional consistency, and the cutting tools on the first tool holder and the second tool holder can cut synchronously, merging two processes into one, greatly shortening the machining time. In addition, the feeding unit in this invention can pick up a single bar or tube, push it to the spindle clamp for processing, and push it to the unloading unit after processing. The unloading unit is used to receive the single bar or tube pushed by the feeding unit and push it to the next process. That is, this device integrates automatic feeding and unloading mechanisms to realize the complete automation of the processing process, reduce manual intervention, and significantly improve production efficiency.

[0047] 2. The feeding unit of this invention includes a first frame mounted on a base, a hopper, a top-feeding mechanism, and a feeding mechanism mounted on the first frame; wherein, the hopper includes a storage chute, a guide plate, and a feeding guide chute connected together, along a second direction, the first end of the storage chute is the feeding side, its second end is connected to the first end of the feeding guide chute through the guide plate, the second end of the feeding guide chute is the discharge side, the first end of the storage chute is higher than its second end, so that the bar or tube can automatically roll from the first end of the storage chute to the second end, the guide plate and the feeding guide chute... One end of the guide rail is higher than the end connecting the guide plate and the storage chute, forming a stepped section. Multiple ejector holes are spaced apart along a first direction on the stepped section. An ejector mechanism is located below the ejector holes and uses them to lift individual bars or tubes that have rolled down to the second end of the storage chute to the feeding guide chute. The first end of the feeding guide chute is higher than its second end, and a feeding mechanism is provided at the second end of the feeding guide chute. This allows the bars or tubes to automatically roll down along the first end of the feeding guide chute to the feeding mechanism, which then feeds them out along the first direction. This system enables automatic feeding, eliminating the need for prolonged repetitive manual work, effectively improving production efficiency and preventing production accidents.

[0048] 3. The feeding unit of the present invention includes a second frame installed on a base and a feeding slide and a receiving mechanism installed on the second frame. In the second direction, the first end of the feeding slide is the receiving side and the second end is the feeding side. The first end of the feeding slide is higher than the second end, so that the bar or tube can automatically roll along the first end of the feeding slide to the second end of the feeding slide. The receiving mechanism includes a support base, a second receiving groove, a guide rail assembly, a mounting assembly, a reset assembly, a tilting assembly, and a receiving drive assembly. The support base is located at the receiving end of the unloading slide and is arranged along a first direction with the main shaft clamp. The guide rail assembly extends along the first direction and is mounted on the support base. The mounting assembly and the reset assembly are both located on the guide rail assembly. The second receiving groove is connected to the mounting assembly. The receiving drive assembly drives the mounting assembly and the reset assembly to move synchronously along the guide rail assembly. When the second receiving groove contacts the tilting assembly, the tilting assembly pushes the second receiving groove down to the unloading slide, causing the bars or tubes in the second receiving groove to roll down the groove to the unloading slide. When the second receiving groove leaves the tilting assembly, the reset assembly pulls the groove back and keeps it in the correct position, ready to receive processed bars or tubes again. This device enables automatic unloading of bars or tubes, reducing labor costs, improving production efficiency, and preventing production accidents. Attached Figure Description

[0049] Figure 1 This is a front view of the double-headed lathe in an embodiment of the present invention;

[0050] Figure 2 This is an axonometric view of the double-headed lathe in an embodiment of the present invention;

[0051] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0052] Figure 4 This is a schematic diagram of the processing unit in an embodiment of the present invention;

[0053] Figure 5 This is a schematic diagram of the structure of the feeding unit at a first angle in an embodiment of the present invention;

[0054] Figure 6 This is a schematic diagram of the second angle of the feeding unit in an embodiment of the present invention;

[0055] Figure 7 This is a schematic diagram of the hopper structure of the feeding unit in an embodiment of the present invention;

[0056] Figure 8 This is a schematic diagram of the top material mechanism of the feeding unit in an embodiment of the present invention;

[0057] Figure 9This is a side view of the height adjustment mechanism and the feeding mechanism of the feeding unit in an embodiment of the present invention;

[0058] Figure 10 This is a schematic diagram of the feeding mechanism of the feeding unit in this embodiment;

[0059] Figure 11 for Figure 10 Enlarged view of point B in the middle;

[0060] Figure 12 for Figure 10 Enlarged view of point C in the middle;

[0061] Figure 13 This is a schematic diagram of the feeding unit in an embodiment of the present invention;

[0062] Figure 14 for Figure 13 Enlarged view of point D in the middle;

[0063] Figure 15 This is a schematic diagram of the structure of the reset component and guide rail component of the feeding unit in an embodiment of the present invention;

[0064] Figure 16 This is a front view of the reset assembly and guide rail assembly of the unloading unit in an embodiment of the present invention;

[0065] Figure 17 This is a schematic diagram of the first angle of the tipping guide block of the feeding unit in an embodiment of the present invention;

[0066] Figure 18 This is a schematic diagram of the second angle of the tilting guide block of the feeding unit in an embodiment of the present invention;

[0067] In the diagram: 1. Base; 2. Positioning mechanism; 201. Base; 202. Adjustable mounting seat; 203. Material blocking cylinder; 204. Material blocking slider; 205. Material blocking slide rail; 206. Material blocking positioning block; 3. Feeding unit; 301. First frame; 302. Material storage slide; 303. Guide plate; 304. Feeding guide slide; 305. Top material hole; 306. Top material cylinder; 307. Support; 308. Top material block; 309. Inclined plane; 310. First lifting... 311. Lifting cylinder; 312. First base plate; 313. Second base plate; 314. Slide rail; 315. First lifting connecting plate; 316. Moving drive mechanism; 317. First receiving groove; 318. Pushing drive assembly; 319. Positioning block; 310. Pushing rod; 311. Limiting block; 312. Pushing block; 313. Pushing spring; 314. Baffle plate; 325. Discharge guide block; 326. Top material cylinder mounting plate; 4. Unloading unit; 407. Second unit Frame; 402. Feeding chute; 403. Support base; 404. Second receiving groove; 405. Tilting guide block; 4051. Tilting guide surface; 406. Rolling element; 407. Fixing block; 408. First guide rail; 409. Second guide rail; 410. First sliding sleeve; 411. Second sliding sleeve; 412. Reset base; 413. Reset support block; 414. Reset spring; 415. First mounting block; 416. Second mounting block; 417. Third sliding sleeve; 418. First material plate; 419. Second material plate; 420. Second lifting cylinder; 421. Second lifting connecting plate; 422. Rodless receiving cylinder; 5. Spindle clamp; 6. First tool holder; 7. Second tool holder; 8. Servo motor; 9. X1 axis moving mechanism; 10. Y1 axis moving mechanism; 11. First slide; 12. X2 axis moving mechanism; 13. Y2 axis moving mechanism; 14. Second slide; 15. Bar or tube; X, first direction; Z, third direction. Detailed Implementation

[0068] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] It should be noted that in the description of this invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0070] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0071] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be further discussed and described in the description of the subsequent figures.

[0072] Example:

[0073] refer to Figures 1 to 4 This embodiment discloses a double-headed lathe, including: a base 1, a positioning mechanism 2, and a loading unit 3, a machining unit 4, and an unloading unit 5 mounted on the base 1. The loading unit 3, machining unit 2, and unloading unit 4 are located along a first direction ( Figure 1 The machining unit includes a spindle holder 5, a first tool holder 6, a second tool holder 7, a first displacement mechanism, and a second displacement mechanism. The spindle holder 5 is mounted on the base 1 and is used to clamp the bar or tube 15 and drive the bar or tube 15 to rotate around its axis. The first tool holder 6 is mounted on one side of the spindle holder 5 through the first displacement mechanism, and the second tool holder 7 is mounted on the other side of the spindle holder 5 through the second displacement mechanism, so that the first tool holder 6, the spindle holder 5, and the second tool holder 7 are arranged sequentially along the first direction. The first displacement mechanism is used to drive the first tool holder 6 to move along the first direction and the second direction. The second displacement mechanism is used to drive the second tool holder 7 to move along the first direction or the second direction. The first tool holder 6 and the second tool holder 7 are used to mount suitable turning tools. The main spindle holder 5 clamps the bar or tube 15 and drives the bar or tube 15 to rotate around its own axis. The first tool holder 6 and the second tool holder 7 are located at the two ends of the bar or tube (hereinafter referred to as the workpiece), respectively, which can process both ends of the workpiece simultaneously. Double-end processing can be achieved by clamping once, which completely eliminates the error of secondary clamping and effectively improves the processing accuracy. The concentricity and dimensional consistency of the workpiece are excellent. The two tool holders work synchronously, and the processing time is shortened by about 50% compared with the traditional single machine processing, which effectively improves the processing efficiency.

[0074] The loading unit 3 is used to pick up a single bar or tube, push it to the spindle clamp 5 for processing, and push it to the unloading unit 4 after processing is completed. The unloading unit 4 is used to receive the single bar or tube pushed by the loading unit and push it to the next process. Through the above settings, automatic loading and unloading of bars or tubes can be realized, effectively reducing labor costs, improving production efficiency, and avoiding production accidents.

[0075] The positioning mechanism 2 is located between the main shaft clamp 5 and the unloading unit 4, and the positioning mechanism 2 can move along a third direction ( Figure 1 The positioning mechanism 2 moves in the Z-direction. When the positioning mechanism 2 is in the first position, it limits the extension length of the single bar or tube pushed by the loading unit 3 to the spindle clamp. When the positioning mechanism 2 is in the second position, the loading unit 3 can push the processed single bar or tube to the unloading unit. The first, second, and third directions are perpendicular to each other. The positioning mechanism 2 is used to limit the position of the workpiece held by the spindle clamp 5, so as to cooperate with the first tool holder 6 and the second tool holder 7 to process both ends of the workpiece synchronously.

[0076] refer to Figure 3 The positioning mechanism includes a base 201, an adjusting mounting seat 202, a blocking cylinder 203, a blocking slider 204, a blocking slide rail 205, and a blocking positioning block 206. The base 201 is mounted on the upper end face of the spindle clamp 5 and extends along a first direction. The adjusting mounting seat 202 is mounted on the base 201 and its position can be adjusted along the first direction (the position of the adjusting mounting seat 202 is determined according to the extension length of the workpiece). The blocking cylinder 203 is distributed along a third direction and mounted on the top of the adjusting mounting seat 202. The output end of the blocking cylinder 203 is connected to the blocking positioning block 206 to drive the blocking positioning block 206 to rise and fall along the third direction. The adjusting mounting seat 202 is also provided with a blocking slide rail 205 distributed along the third direction. The blocking positioning block 206 is connected to the blocking slide rail 205 through the blocking slider 204 to improve the stability of the blocking positioning block 206. When the feeding unit pushes the workpiece to move along the first direction, the stop cylinder 203 drives the stop positioning block 206 to descend along the third direction, thereby blocking the workpiece from continuing to move and positioning the workpiece. Then the spindle holder clamps the workpiece, and the stop cylinder 203 drives the stop positioning block 206 to rise along the third direction (to avoid blocking the cutting tool from working), and the cutting tool on the tool holder begins to work.

[0077] Specifically, the spindle clamp 5 is an existing three-jaw chuck, driven by a servo motor 8 through a common transmission mechanism such as a belt, so that the spindle clamp 5 can hold the workpiece and drive the workpiece to rotate around its own axis. (Reference) Figure 4The first displacement mechanism includes an X1-axis moving mechanism 9, a Y1-axis moving mechanism 10, and a first slide 11. The X1-axis moving mechanism 9 extends along a first direction, and the first slide 11 is mounted on the output end of the X1-axis moving mechanism 9, which can drive the first slide 11 to move along the first direction. The Y1-axis moving mechanism 10 is mounted on the first slide 11, and the first tool holder 6 is mounted on the output end of the Y1-axis moving mechanism 9, which is used to drive the first tool holder 6 to move along a second direction. The X1-axis moving mechanism 9 includes an X-axis slide rail, a first lead screw, and a first motor. The axes of the X-axis slide rail and the first lead screw both extend along a first direction. The first motor drives the first lead screw to rotate. The ball nut of the first lead screw is connected to a first slide table, which is also slidably connected to the X-axis slide rail. With this configuration, the first slide table can move along the X-axis slide rail under the drive of the first motor. The Y1-axis moving mechanism 9 includes a Y-axis slide rail, a second lead screw, and a second motor. The axes of the Y-axis slide rail and the second lead screw extend along a second direction. The second motor drives the second lead screw to rotate. The ball nut of the second lead screw is connected to a first tool holder, which is also slidably connected to the Y-axis slide rail. With this configuration, the first tool holder can move along the Y-axis slide rail under the drive of the second motor. The X1-axis moving mechanism 9 and the Y1-axis moving mechanism 10 cooperate to realize the movement of the first tool holder 6 along the first and second directions. The first tool holder 6 has multiple mounting slots distributed along the first direction and extending along the second direction for mounting turning tools of different sizes.

[0078] The second displacement mechanism includes an X2-axis moving mechanism 12, a Y2-axis moving mechanism 13, and a second slide 14. The X2-axis moving mechanism 12 extends along a first direction. The second slide 14 is mounted on the output end of the X2-axis moving mechanism 12 and can be driven to move along the first direction. The Y2-axis moving mechanism 13 is mounted on the second slide 14, and the second tool holder 7 is mounted on the output end of the Y2-axis moving mechanism 12 and is used to drive the second tool holder 7 to move along a second direction. The specific structures of the X2-axis moving mechanism 12 and the Y2-axis moving mechanism 13 are the same as those of the X1-axis moving mechanism 9 and the Y1-axis moving mechanism 10, and are all driven by a combination of motor and lead screw. The X2-axis moving mechanism 12 and the Y2-axis moving mechanism 13 can drive the second tool holder to move along the first direction and the second direction, thereby adjusting the position of the second tool holder 7.

[0079] refer to Figure 5 , Figure 6 and Figure 7In this embodiment, the feeding unit 3 includes a first frame 301, which is fixed to the base 1. It also includes a hopper, a top-feeding mechanism, and a feeding mechanism. The hopper is disposed on the first frame 301 and includes a storage chute 302, a guide plate 303, and a feeding guide chute 304. Along the second direction, the first end of the storage chute 302 is the feeding side, and the second end of the storage chute 302 is connected to the first end of the feeding guide chute 304 via the guide plate 303. The second end of the feeding guide chute 304 is the discharging side. The first end of the storage chute 302 is higher than the second end of the storage chute 302, so that the bar or tube 15 can automatically roll along the first end of the storage chute 302 to the second end. The first end of the feeding guide chute 304 is higher than the second end of the feeding guide chute 304, so that the bar or tube can automatically roll along the first end of the feeding guide chute 304. The material automatically rolls to the second end of the feeding guide slide 304; the end of the guide plate 303 connected to the feeding guide slide 304 is higher than the end of the guide plate 303 connected to the storage slide 302, so that the connection between the feeding guide slide 304 and the storage slide 302 forms a stepped portion, and the stepped portion has a plurality of top-feeding holes 305 arranged at intervals along the first direction; the top-feeding mechanism is set on the first frame 301 and located below the stepped portion, and the top-feeding mechanism is used to pass through the top-feeding holes 305 and cooperate with the guide plate 303 to lift a single bar or tube, so as to transfer it from the storage slide 302 to the feeding guide slide 304; the feeding mechanism and the main shaft clamp 5 are arranged along the first direction, and the feeding mechanism is installed on the first frame 301 and close to the discharge side of the feeding guide slide 304; it is used to receive the bar or tube 15 rolling off the feeding guide slide 304 and feed it to the main shaft clamp 5 along the first direction.

[0080] In the feeding unit, the first end of the storage chute 302 is the feeding side. Bars or tubes are added to the first end of the storage chute 302 via a mechanical gripper or manually. Because the first end of the storage chute 302 is higher than its second end, the bars or tubes automatically roll down to the second end after entering the first end. A guide plate 303 is provided at the second end of the storage chute 302. The guide plate 303 first stops the bars or tubes, preventing them from rolling. Then, the ejector mechanism extends along the ejector hole 305, lifting the single bar or tube (the ejector surface of the ejector mechanism is flush with the single bar or tube). The diameter of the tube corresponds to the material being lifted, ensuring that only a single rod or tube can be lifted at a time. At this point, the guide plate 303 cooperates with the lifting mechanism to convey the single rod or tube upwards. When the single rod or tube (hereinafter referred to as the workpiece) is higher than the second end of the guide plate 303, it is transferred to the loading guide slide 304. Because the first end of the loading guide slide 304 is higher than its second end, and its first end is connected to the guide plate 303, while its second end is close to the feeding mechanism, the workpiece transferred to the loading guide slide will automatically roll down to the feeding mechanism, and then be fed to the spindle clamp along the first direction. The loading unit can realize automatic loading of rods or tubes, eliminating the need for long-term repetitive manual work, effectively improving production efficiency and avoiding production accidents.

[0081] refer to Figure 8 The material-ejecting mechanism includes a material-distributing ejector rod and an ejector cylinder 306. The material-distributing ejector rod includes a support 307 and a plurality of ejector blocks 308. The plurality of ejector blocks 308 are spaced apart on the support 307 along a first direction, and each ejector block 308 corresponds one-to-one with an ejector hole 305. The ejector cylinder 306 is mounted on a first frame 301, and the output end of the ejector cylinder 306 is connected to the support 307 to drive the ejector blocks 308 through the ejector holes 305. (Reference) Figure 5 and Figure 8 Since both the storage slide 302 and the loading guide slide 304 are inclined, in order to better lift the workpiece, the lifting cylinder 306 is inclinedly installed on the first frame 301 through the lifting cylinder mounting plate 321. Moreover, the contact surface between the lifting block 308 and the single bar or tube is an inclined plane 309. By setting the inclined plane 309, the contact area with the workpiece can be increased, making the lifting process more stable. At the same time, after the lifting block 308 lifts the single bar or tube to the loading guide slide, without the obstruction of the guide plate, the workpiece can roll along the inclined plane 309 to the loading guide slide.

[0082] refer to Figure 9The feeding unit also includes a height adjustment mechanism. This mechanism comprises a first lifting cylinder 310 and a first base plate 311. The first lifting cylinder 310 is mounted on the first frame 301, and its output end is connected to the first base plate 311. The output end of the first lifting cylinder 310 can reciprocate along a third direction. All feeding mechanisms are mounted on the first base plate 311. The height adjustment mechanism can adjust the height of the feeding mechanism along a third direction, thereby adapting it to different heights of the feeding guide slides 304 and the spindle grippers aligned with different heights. To improve the support capacity of the height adjustment mechanism, two or more first lifting cylinders 310 can be provided.

[0083] refer to Figure 9 and Figure 10 The feeding unit also includes an overall moving mechanism, which includes a second base plate 312, a slide rail 313, a slide block, a first lifting connecting plate 314, and a moving drive mechanism 315. The slide rail 313 is installed on the side of the first base plate 311 away from the feeding mechanism and extends along a first direction. The slide block is movably installed on the slide rail 313. The output end of the first lifting cylinder 310 is connected to the slide block through the first lifting connecting plate 314. The second base plate 312 is installed on the side of the first lifting connecting plate 314 away from the slide block. The moving drive mechanism 315 is installed on the second base plate 312 and its output end is connected to the first base plate 311 and can reciprocate along the first direction. The moving drive mechanism 315 is a rodless cylinder (commonly available rodless cylinders). The cylinder body of the rodless cylinder extends along the first direction and is mounted on the second base plate 312. The slider of the rodless cylinder is connected to the first base plate 311. The first base plate 311 is also provided with a slide rail 313. The slide rail 313 is connected to the first lifting connecting plate 314 through a sliding seat. Therefore, when the moving cylinder is activated, the first base plate and the feeding mechanism on the first base plate can move along the second direction (the slide rail and the sliding seat are slidably connected). In addition, the moving mechanism is connected to the first lifting connecting plate 314 through the second base plate 312. When the first lifting cylinder is activated, the second base plate 312, the moving drive mechanism and the feeding mechanism rise and fall simultaneously. With the above settings, the height of the feeding mechanism can be adjusted, and the range of movement of the feeding mechanism along the first direction can be extended to send a single bar or tube to the position corresponding to the spindle clamp. It can also push the single bar or tube that has been turned to the unloading station to achieve automatic unloading.

[0084] Specifically, the first lifting connecting plate 314 includes a first vertical section distributed along a third direction and a first horizontal section distributed along a second direction. The first vertical section and the first horizontal section are integrated. The first vertical section is used to connect to the output end of the first lifting cylinder. The upper end face of the first horizontal section is used to fix the slide block, and the lower end face of the first horizontal section is used to fix the second base plate 312. The first lifting connecting plate 314 is generally L-shaped. The upper end face of the first horizontal section is connected to the slide block, and the lower end face of the first horizontal section is connected to the second base plate 312. By setting the first lifting connecting plate 314, the first lifting cylinder 310 can adjust the height of the feeding mechanism along the third direction without affecting the movement of the feeding mechanism along the first direction.

[0085] refer to Figure 9 and Figure 10 The feeding mechanism includes a first receiving groove 316, a pushing drive assembly 317, and a pushing rod 318. The first receiving groove is mounted on a first substrate 311 and extends along a first direction. The pushing drive assembly 317 is disposed on the first substrate 311 and located above the first receiving groove 316. The output end of the pushing drive assembly 317 is connected to the pushing rod 318 and is used to drive the pushing rod 318 to reciprocate along the first direction, so as to feed a single rod or tube in the first receiving groove 316 out along the first direction. Specifically, the first receiving groove 316 is mounted on the upper surface of the first substrate 311, and the pushing drive assembly 317 is a rodless pushing cylinder (commonly available rodless cylinders). The cylinder body of the rodless pushing cylinder extends along a second direction and is mounted on the first substrate through a connecting bracket. The slider of the rodless pushing cylinder is connected to the pushing rod 318, thereby pushing the pushing rod 318 to slide along the cylinder body of the rodless pushing cylinder.

[0086] refer to Figure 12 The first receiving groove 316 includes a receiving plate and a V-shaped material trough. The receiving plate is disposed on both sides of the opening end of the material trough. The receiving plate is used to extend the opening of the material trough outward in the horizontal direction. When the bar or tube rolls down along the feeding guide slide, it can smoothly enter the material trough under the overlap of the receiving plate and prevent the bar or tube from falling out of the material trough.

[0087] refer to Figure 6 It also includes a baffle plate 319, which is disposed on a receiving plate away from the feeding guide slide 304 to prevent bars or tubes from falling out of the trough. (Reference) Figure 12 It also includes a discharge guide block 320; the discharge guide block 320 is disposed in the first receiving groove 316, and the discharge guide block 320 has a guide hole that runs through the first direction to ensure that the bar or tube is fed out in the first direction.

[0088] refer to Figure 10 and Figure 11The pusher drive assembly 317 includes a pusher rodless cylinder. The cylinder body of the pusher rodless cylinder is mounted on the first base plate 311 and located above the pusher rod 318. The cylinder body of the pusher rodless cylinder extends along a first direction. The slider of the pusher rodless cylinder is connected to the pusher rod 318 to push the pusher rod to reciprocate along the first direction. The push rod 318 includes a limiting block 3181, a connecting rod, a push block 3182, and a push spring 3183. The limiting block 3181, the connecting rod, and the push block 3182 are connected in sequence. The outer diameters of the limiting block 3181 and the push block 3182 are both larger than the connecting rod. A positioning block 3171 extending towards the push rod is provided on the slider of the push rodless cylinder. The positioning block 3171 has a through hole that matches the outer diameter of the connecting rod. The connecting rod is located in the through hole. The push block 3182 is close to the main shaft clamp 5, and the limiting block 3181 is away from the main shaft clamp 5. The push spring 3183 is sleeved on the outer periphery of the connecting rod, and the first end of the push spring 3183 abuts against the push block 3182, while the other end of the push spring 3183 abuts against the positioning block 3171. This setting provides a good buffering effect during the material feeding process, preventing damage to the bars or pipes.

[0089] refer to Figure 13 and Figure 14The unloading unit 4 includes: a second frame 401 fixed to the base 1; and an unloading slide 402 and a receiving mechanism. The unloading slide 402 is disposed on the second frame 401 along a second direction. The first end of the unloading slide 402 is the receiving side, and the second end is the unloading side. The first end of the unloading slide 402 is higher than the second end, so that the bar or tube 15 automatically rolls along the first end of the unloading slide 402 to the second end. The receiving mechanism is disposed on the second frame 401 and arranged with the main shaft clamp 5 along a first direction. The receiving mechanism includes a support base 403, a second receiving groove 404, a guide rail assembly, an installation assembly, a reset assembly, a tilting assembly, and a receiving drive assembly. The guide rail assembly is installed on the support base 403, and the axis of the guide rail assembly extends along the first direction. Both the mounting component and the reset component are slidably mounted on the guide rail assembly, and the mounting component can also rotate around the axis of the guide rail assembly. The output end of the receiving drive mechanism can reciprocate along a first direction, and the output end of the receiving drive mechanism is used to drive the mounting component and the reset component to slide synchronously along the guide rail assembly. The tilting component is located away from the main shaft clamp 5. The second receiving groove 404 is connected to the mounting component so that the second receiving groove 404 can follow the mounting component to reciprocate along the guide rail assembly and can rotate around the axis of the guide rail assembly. When the second receiving groove 404 contacts the tilting component, the tilting component pushes the second receiving groove 404 down to the discharge slide 402, causing the bar or tube in the second receiving groove 404 to roll down along the receiving groove 404 to the discharge slide 401. When the second receiving groove 404 leaves the tilting component, the reset component can drive the second receiving groove 404 to return to its original position. The unloading unit 4 can realize automatic unloading of bars or tubes, reduce labor costs, improve production efficiency, and avoid production accidents.

[0090] refer to Figure 14The tipping assembly includes a tipping guide block 405 and a top tipping component; the top tipping component is disposed on the side of the support base 403 away from the main shaft clamp 5, the tipping guide block 405 is fixed to the second receiving groove 404, and the tipping guide block 405 is located on the side of the second receiving groove 404 away from the discharge slide 402 and the main shaft clamp 5, the top tipping component cooperates with the tipping guide block 405 to make the second receiving groove tip over to the discharge slide. The top-flipping component includes a rotatable rolling element 406. The flipping guide block 405 has a first end away from the main spindle clamp 5 and a second end close to the main spindle clamp 5, as well as a flipping guide surface 4051 facing the rolling element 406. The distance between the flipping guide surface 4051 and the second receiving groove 404 gradually increases from the first end to the second end of the flipping guide block 405. When the rolling element 406 rolls from the first end to the second end of the flipping guide block (pushing the second receiving groove 404 away from the main spindle clamp 5), the rolling element 406 can push the second receiving groove 404 over. When the rolling element 406 rolls from the second end to the first end of the flipping guide block 405 (pushing the second receiving groove 404 close to the main spindle clamp 5), the reset component gradually drives the second receiving groove 404 to return to its correct position.

[0091] The rolling element 406 also includes a fixing block 407, which is installed on the side of the support base 403 away from the main shaft clamp 5. The rolling element 406 is rotatably mounted on the top of the fixing block 407. The rolling element 406 is a bearing, and the outer surface of the bearing can roll into contact with the tilting guide block 405, thereby applying a thrust to the tilting guide block 405, causing the second receiving groove 404 to tilt towards the material slide 402. Using a bearing as the rolling element can improve its service life; the tilting guide surface 401 is a smooth curved surface, and the bearing rolls along this surface, making the tilting process of the receiving groove more stable and smooth.

[0092] refer to Figure 15 and Figure 16 The guide rail assembly includes a first guide rail 408 and a second guide rail 409. The first guide rail 408 and the second guide rail 409 are arranged along a second direction, and their axes both extend along a first direction. Both the first guide rail 408 and the second guide rail 409 are mounted on a support base. The first guide rail 408 is closer to the discharge slide 402, and the second guide rail 409 is farther from the discharge slide 402. The reset assembly is connected to the first guide rail 408 and the second guide rail 409, and the mounting assembly is connected to the first guide rail 408. The mounting assembly, connected to the first guide rail 408, can slide along and rotate around the first guide rail 408, thus facilitating the tipping action of the second receiving groove 404. The reset assembly, simultaneously connected to the first guide rail 408 and the second guide rail 409, ensures the stability of the reset assembly during its sliding process.

[0093] refer to Figure 15 and Figure 16 The reset assembly includes a first sliding sleeve 410, a second sliding sleeve 411, a reset base 412, a reset support block 413, and a reset spring 414. The first sliding sleeve 410 is sleeved on a first guide rail 408, and the second sliding sleeve 411 is sleeved on a second guide rail 409. The reset base 412 connects the first sliding sleeve 410 and the second sliding sleeve 411. The material receiving drive assembly is connected to the reset base 412. The reset support block 413 is installed on the reset base 412 and close to the second guide rail 409. The first end of the reset spring 414 is connected to the reset base 412, and the second end of the reset spring 414 is connected to the second material receiving groove 404 to pull the second material receiving groove 404 to contact the reset support block 413. The reset spring 414 is always connected to the second receiving groove 404 (for easy viewing of the corresponding structure, the reset spring 414 is not connected to the second receiving groove in the attached diagram of the instruction manual, but in actual use, the second end of the reset spring 414 is always hooked on the spring hole on the second receiving groove). When the tilting guide block 405 on the second receiving groove 404 contacts the rolling element 406, the reset spring 141 is stretched. When the second receiving groove tilts and disengages from the top tilting element, the reset spring 414 pulls the second receiving groove to abut against the reset support block 413. At this time, the second receiving groove returns to its correct position and is ready to receive the next bar or tube.

[0094] The mounting assembly includes a first mounting block 415, a second mounting block 416, and a third sliding sleeve 417. The third sliding sleeve 417 is fitted onto the first guide rail 408 and is slidable along the first guide rail 408 and rotatable around the axis of the first guide rail 408. The first mounting block 415 is fixed to the third sliding sleeve 417. The second mounting block 416 is fitted onto the first sliding sleeve 410 and is rotatable around the axis of the first guide rail 408. Both the first mounting block 415 and the second mounting block 416 are used to mount the second receiving groove. The first sliding sleeve 410, the second sliding sleeve 411, and the third sliding sleeve 417 are all existing stroke-type linear bearings, which can slide linearly along the guide rail and rotate around the axis of the guide rail. However, after installation, since the first sliding sleeve 410 and the second sliding sleeve 411 are connected to the reset base 412, the axial rotation of the first sliding sleeve 410 and the second sliding sleeve 411 is restricted. Since the second mounting block 416 is fitted onto the first sliding sleeve 411, the second mounting block 416 can also rotate axially while moving linearly with the first sliding sleeve 411. The first mounting block is directly connected to the third sliding sleeve 417, and can also rotate around the axis of the guide rail while sliding linearly along the guide rail with the third sliding sleeve. Through the above settings, the second receiving trough can achieve the tipping and reset action during the sliding along the guide rail.

[0095] refer to Figure 14The second receiving groove 404 includes a first material plate 418 and a second material plate 419. The first end of the first material plate 418 is connected to the first end of the second material plate 419, and the second ends of the first material plate 418 and the second material plate 419 are separated, so that the cross-section of the second receiving groove is V-shaped. The first material plate 418 is close to the discharge slide 402 and is connected to the first mounting block 415 and the second mounting block 416. The second material plate 419 is located away from the discharge slide 402 and is used to connect the tipping guide block 405 and the return spring 414. By connecting the first material plate 418 to the first mounting block 415 and the second mounting block 416, and by mounting the tipping guide block 405 and connecting the return spring 414 on the second material plate 419, the second receiving groove 404 can slide along the guide rail and can also perform tipping and reset actions. The reset support block 413 has an inclined surface that mates with the second material plate, so that when the second material plate contacts the reset support block, the second receiving groove returns to its correct position, preventing the rod or tube in the second receiving groove from coming out. In order to match the shape and movement of the second receiving groove 404, the fixing block 407 is installed at an angle on the side of the support base away from the processing device.

[0096] It also includes a lifting mechanism, which comprises a second lifting cylinder 421. The output end of the second lifting cylinder 421 is reciprocating along a third direction. The output end of the second lifting cylinder 421 is connected to a support base 403 to adjust the height of the second receiving groove 404 along the third direction. This configuration allows adjustment of the height of the second receiving groove along the third direction to accommodate different heights of the unloading slide 402 and the main shaft clamp 5. It also includes a second lifting connecting plate 421, which comprises a second vertical section distributed along the third direction and a second horizontal section distributed along a second direction. The second vertical section and the second horizontal section are integrated. The first vertical section is used to connect to the output end of the second lifting cylinder 420, and the second horizontal section is used to connect to the support base 403.

[0097] The material receiving drive component is a rodless receiving cylinder 422 (a commercially available rodless cylinder). The cylinder body of the rodless receiving cylinder 422 is mounted on the support base 403 and extends along the first direction. The slider of the rodless cylinder 422 is connected to the reset base 412. By pushing the reset base 412 with the rodless receiving cylinder 422, the first sliding sleeve 410, the second sliding sleeve 411, and the third sliding sleeve 417 slide along the guide rail, realizing the synchronous movement of the second receiving groove 404, the first mounting block 415, the second mounting block 406, and the reset base 412. The use of a rodless cylinder saves installation space and makes the entire equipment structure more compact.

[0098] In this device, the base 1 is a sheet metal welded structure, which is then annealed and machined. The first slide 11, the second slide 14, the first tool holder 6, and the second tool holder 7 are high-strength casting structures, providing high stability and high precision for the long-term operation of the entire machine. The spindle holder 5 is located in the middle of the bed. The workpiece can pass through and be held in the middle of the spindle holder 5. It is driven to rotate by the servo motor 8, providing the main cutting motion for the workpiece. The size of the spindle holder 5 can be selected according to the diameter and length of the workpiece. The first slide and the first tool holder are located on the left side of the spindle holder. The first tool holder can move on the X1 and Y1 axes. The first tool holder has multiple positions for mounting turning tools, used for turning, drilling, tapping, and other machining on the left end of the workpiece. The second slide and the second tool holder are located on the right side of the spindle holder. The first tool holder can move on the X2 and Y2 axes, used for turning, drilling, tapping, and other machining on the right end of the workpiece.

[0099] In specific work:

[0100] 1. A bar or tube 15 is fed into the storage chute 302 from the outside. The bar or tube automatically rolls to the guide plate 202. At this time, the ejector cylinder 306 is activated, lifting the single bar or tube to the loading guide chute 304, and then automatically rolling down into the first receiving groove 316. The moving drive mechanism 315 is activated, moving the first substrate 311 along the slide rail 313 as a whole. Then the pushing drive assembly 317 is activated, pushing the bar or tube into the spindle clamp.

[0101] 2. In positioning mechanism 2, the stop positioning block 206 extends downward to prevent the workpiece from moving forward. The spindle chuck 5 clamps the workpiece, and the stop positioning block 206 rises to reset. Machining begins: the spindle chuck 5 rotates, and the left and right slides move synchronously towards the workpiece, simultaneously performing turning machining on both ends. After machining is completed, the spindle stops rotating, and the chuck is released. The moving drive mechanism 315 and the push drive assembly 317 actuate again, pushing the machined workpiece to the right via the push rod 318.

[0102] 3. The pushed-out workpiece falls into the second receiving groove 404 on the right. The receiving rodless cylinder 422 is activated, which moves the second receiving groove 404 away from and closer to the unloading slide. During this process, the reset spring 414 always pulls the second receiving groove 404 so that it abuts against the reset support block 413, keeping the second receiving groove 404 back to the correct position and preventing the workpiece from falling out.

[0103] 4. When the rolling element 406 contacts the tipping guide block 405 and slides along the tipping guide surface 4051, it flips the second receiving groove 404, causing it to fall onto the feeding slide 402. The workpiece is automatically discharged along the feeding slide 402. Then, the receiving rodless cylinder 422 drives the second receiving groove to return, the tipping guide block 405 leaves the tipping guide block 405, and the second receiving groove 404 is reset under the pulling force of the reset spring 414, abutting against the reset support block 413, ready to receive material again.

[0104] 5. The left and right slides return to their safe positions to prepare for the next cycle.

[0105] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-head lathe characterized by, The utility model relates to a double -end lathe, including: a base, a positioning mechanism and a feeding unit, a machining unit and a discharging unit mounted on the base, the feeding unit, the machining unit and the discharging unit are sequentially arranged along a first direction; The machining unit includes a spindle holder, a first tool holder, a second tool holder, a first displacement mechanism and a second displacement mechanism, the spindle holder is mounted on the base, the spindle holder is used to clamp a bar or a pipe and drive the bar or the pipe to rotate around its axis, the first tool holder is mounted on one side of the spindle holder through the first displacement mechanism, the second tool holder is mounted on the other side of the spindle holder through the second displacement mechanism, so that the first tool holder, the spindle holder and the second tool holder are sequentially arranged along the first direction, the first displacement mechanism is used to drive the first tool holder to move along the first direction and a second direction, and the second displacement mechanism is used to drive the second tool holder to move along the first direction or the second direction; The feeding unit is used to pick up a single bar or pipe, push it to the spindle holder for machining, and push it to the discharging unit after machining is completed; The discharging unit is used to receive the single bar or pipe pushed by the feeding unit and push it to the next process; The positioning mechanism is located between the spindle holder and the discharging unit, and the positioning mechanism can move along a third direction, when the positioning mechanism is in a first station, the positioning mechanism limits the extension length of the single bar or pipe pushed by the feeding unit to the spindle holder, when the positioning mechanism is in a second station, the feeding unit can push the machined single bar or pipe to the discharging unit, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The double-end lathe according to claim 1, wherein: The feeding unit includes a first rack, and the first rack is fixed to the base; a hopper, the hopper is arranged on the first rack, the hopper includes a storage chute, a guide plate and a feeding guide chute, along a second direction, a first end of the storage chute is an inlet side, a second end of the storage chute is connected to a first end of the feeding guide chute through the guide plate, a second end of the feeding guide chute is an outlet side, the first end of the storage chute is higher than the second end of the storage chute, so that the bar or the pipe can automatically roll along the first end of the storage chute to the second end of the storage chute, the first end of the feeding guide chute is higher than the second end of the feeding guide chute, so that the bar or the pipe can automatically roll along the first end of the feeding guide chute to the second end of the feeding guide chute, an end of the guide plate connected to the feeding guide chute is higher than an end of the guide plate connected to the storage chute, so that a stepped portion is formed at the connection between the feeding guide chute and the storage chute, and a plurality of top material holes are arranged at the stepped portion along the first direction; a top material mechanism, the top material mechanism is arranged on the first rack and located below the stepped portion, the top material mechanism is used to pass through the top material hole and cooperate with the guide plate to lift the single bar or pipe, so as to transfer it from the storage chute to the feeding guide chute. The feeding mechanism is arranged along the first direction with the spindle chuck, is installed on the first rack, and is close to the discharging side of the feeding guide chute.

3. A double-headed lathe according to claim 2, characterized in that: The feeding mechanism includes a first receiving groove, a pushing driving assembly, and a pushing rod. The first receiving groove is arranged on the first rack and extends along the first direction. The pushing driving assembly is arranged on the first rack and above the first receiving groove. The output end of the pushing driving assembly is connected with the pushing rod, and is used to drive the pushing rod to reciprocate along the first direction, so as to send the single bar or pipe in the first receiving groove out along the first direction.

4. A double-headed lathe according to claim 3, characterized in that: The contact surface of the feeding block and the single bar or pipe is an inclined plane, so that the single bar or pipe is automatically rolled after being lifted by the feeding block to the feeding guide chute.

5. The double-headed lathe of claim 1, wherein: The feeding mechanism includes a first receiving groove, a pushing driving assembly, and a pushing rod. The first receiving groove is arranged on the first rack and extends along the first direction. The pushing driving assembly is arranged on the first rack and above the first receiving groove. The output end of the pushing driving assembly is connected with the pushing rod, and is used to drive the pushing rod to reciprocate along the first direction, so as to send the single bar or pipe in the first receiving groove out along the first direction.

6. The double-head lathe according to claim 5, wherein: The feeding mechanism is arranged along the first direction with the spindle chuck, is installed on the first rack, and is close to the discharging side of the feeding guide chute. The feeding mechanism includes a first receiving groove, a pushing driving assembly, and a pushing rod. The first receiving groove is arranged on the first rack and extends along the first direction. The pushing driving assembly is arranged on the first rack and above the first receiving groove. The output end of the pushing driving assembly is connected with the pushing rod, and is used to drive the pushing rod to reciprocate along the first direction, so as to send the single bar or pipe in the first receiving groove out along the first direction. ​ ​ 7. A double-headed lathe according to claim 6, characterised in that: The overturning assembly comprises an overturning guide block and a top overturning piece; the top overturning piece is arranged on the side of the support seat away from the main shaft clamp seat; the overturning guide block is fixed to the second material receiving groove, and is located on the side of the second material receiving groove away from the material discharging slide and the main shaft clamp seat; the top overturning piece cooperates with the overturning guide block to make the second material receiving groove overturn to the material discharging slide.

8. A double-headed lathe according to claim 7, characterised in that: The top overturning piece comprises a rotatable rolling piece; the overturning guide block has a first end away from the main shaft clamp seat, a second end close to the main shaft clamp seat, and an overturning guide surface facing the rolling piece; the overturning guide surface gradually increases along the distance between the first end and the second end of the overturning guide block and the second material receiving groove; when the rolling piece rolls along the first end to the second end of the overturning guide block, the rolling piece can push down the second material receiving groove; when the rolling piece rolls along the second end to the first end of the overturning guide block, the reset assembly gradually drives the second material receiving groove to return to the normal position.

9. The double-headed lathe according to claim 6, characterized in that: The guide rail assembly comprises a first guide rail and a second guide rail; the first guide rail and the second guide rail are arranged along the second direction, and the axes of the first guide rail and the second guide rail extend along the first direction; the first guide rail and the second guide rail are both mounted on the support seat, and the first guide rail is close to the material discharging slide, and the second guide rail is away from the material discharging slide; the reset assembly is connected with the first guide rail and the second guide rail; and the mounting assembly is connected with the first guide rail.

10. A double-headed lathe according to claim 9, characterized in that: The reset assembly comprises a first sliding sleeve, a second sliding sleeve, a reset base, a reset support block and a reset spring; the first sliding sleeve is sleeved on the first guide rail, the second sliding sleeve is sleeved on the second guide rail, the reset base is connected with the first sliding sleeve and the second sliding sleeve, the material receiving driving assembly is connected with the reset base, the reset support block is mounted on the reset base and close to the second guide rail, the first end of the reset spring is connected with the reset base, and the second end of the reset spring is connected with the second material receiving groove to pull the second material receiving groove to contact the reset support block.

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