Hydraulic machine tool with multi-stage positioning device

Abstract

According to the hydraulic machine tool with the multi-stage positioning device applied to the field of hydraulic machine tools, a clamp and a fine adjustment platform are matched to clamp a workpiece, the moving function of a positioning driving table and a precise adjustment mechanism of a push rod below a rotating core are combined, rapid centering positioning of the workpiece before machining can be achieved, and the machining precision is remarkably improved; the machining deviation caused by initial deviation is avoided, the consistency and the qualified rate of finished products are improved, a rotatable leveling shaft structure is adopted, a push rod is driven by centrifugal force to extend outwards, a fine adjustment platform is pushed to achieve position correction, error compensation is automatically completed when a positioning driving table is not accurately centered, the deviation resistance of a system is enhanced, manual intervention is reduced, and the production efficiency is improved. When the rotating core rotates, the bottom plate and the fan blades are driven to rotate, air is supplied to the fan, the driving shaft in the mounting plate is driven to rotate, a power system which supplies energy through self-circulation of the rotating core is formed, use of extra motors is reduced, and structural complexity and energy consumption are reduced.

Description

Technical Field

[0001] The present invention relates to a hydraulic machine tool, in particular to a hydraulic machine tool with a multi-stage positioning device applied in the field of hydraulic machine tools. Background Art

[0002] Hydraulic machine tools are a common type of pressure processing equipment, widely used in industrial scenarios such as sheet metal stamping, metal stretching, and mold forming. During the processing, in order to ensure the forming accuracy of the workpiece, it must be accurately positioned. Especially on automated processing production lines, the positioning accuracy directly affects the consistency and yield of the product. Currently, common hydraulic machine tools mostly use a mobile platform with a positioning function to move the workpiece to the processing area to achieve preliminary positioning. However, in actual operation, due to interference from factors such as workpiece loading accuracy and mobile mechanism response error, the initial position of the workpiece may deviate, resulting in an offset of the final processing center, which in turn affects the quality of the finished product.

[0003] More importantly, traditional hydraulic machine tools generally use a single positioning structure or preset stroke to control the position of the workpiece. Once the positioning deviation of the mobile platform exceeds the error tolerance, the equipment itself lacks the ability to self-adjust, cannot perform secondary correction of the error, and cannot provide reliable real-time feedback. Therefore, how to build a structure with multi-level positioning functions based on existing hydraulic machine tools, review and fine-tune the workpiece before and during processing, and have a certain error compensation and feedback mechanism, has become a key direction for improving the processing accuracy and stability of hydraulic machine tools. Summary of the Invention

[0004] In response to the above-mentioned existing technologies, the technical problem to be solved by the present invention is that hydraulic machine tools need to accurately position the workpiece during metal forming processing, but existing equipment mostly relies on a single positioning method and lacks error compensation and adjustment mechanisms, which easily leads to the offset of the machining center and affects the accuracy of the finished product.

[0005] To solve the above problems, the present invention provides a hydraulic machine tool with a multi-stage positioning device, comprising a frame, a machine head is fixedly connected to the top of the frame, a rotating core is installed at the bottom of the machine head, a positioning drive platform is fixedly connected to the bottom end of the frame, a fine-tuning platform is fixedly connected to the top end of the positioning drive platform, a fixture is fixedly connected to the top end of the fine-tuning platform, and the fixture is used to clamp a workpiece, a plurality of evenly distributed mounting plates are fixedly connected to the inner side wall of the frame, an air duct is fixedly connected to the top end of the mounting plate, a partition is fixedly connected to the middle of the air duct, a drive shaft is rotatably connected to the middle end of the partition, a front drive wheel is fixedly connected to the bottom end of the drive shaft, a leveling shaft is rotatably connected to the top end of the mounting plate, a turntable is fixedly connected to the top end of the leveling shaft, a secondary piston is fixedly connected to the middle end of the leveling shaft, the turntable is located above the secondary piston, a main piston is rotatably connected between the front drive wheel and the secondary piston, a plurality of evenly distributed push rods are slidably connected to the top end of the turntable, a processing area is set between the plurality of turntables, the center point of the processing area and the center point of the rotating core are on the same straight line, and the center point of the fine-tuning platform and the center point of the fixture are on the same straight line.

[0006] As a further improvement of the present application, the bottom end of the machine head is fixedly connected to a wind frame, the wind frame is sleeved on the outside of the rotating core, the outer wall of the rotating core is fixedly connected to a bottom plate, and the bottom end of the bottom plate is fixedly connected to a plurality of evenly distributed fan blades.

[0007] As a further improvement of the present application, a plurality of evenly distributed blowing pipes are fixedly connected to the outer wall of the wind frame, the plurality of blowing pipes correspond one-to-one to the plurality of air ducts and one end of the blowing pipe is located directly above the air duct, and an air inlet hole is provided at the bottom end of the wind frame.

[0008] As a further improvement of the present application, a fan is fixedly connected to the top end of the drive shaft, and a plurality of air outlet holes are opened on the side wall of the air duct, and the air outlet holes are located on the upper side of the partition.

[0009] As another improvement of the present application, the fine-tuning platform includes a movable platform, a plurality of evenly distributed return springs are fixedly connected between the movable platform and the positioning drive platform, and a cross guide frame is fixedly connected between the movable platform and the positioning drive platform.

[0010] As another improved supplement to the present application, a tensioning cavity is opened inside the movable platform, a telescopic rod is fixedly connected to the top of the positioning drive platform, a pressure plate is fixedly connected to the output end of the telescopic rod, the pressure plate is located on the inner side of the tensioning cavity, and the bottom surfaces of the tensioning cavity and the pressure plate are respectively set to rough surfaces.

[0011] As another improved supplement to the present application, the top of the mounting plate is slidably connected to an arc plate, one end of the push rod is fixedly connected to a roller, the roller is attached to the side of the arc plate, both ends of the mounting plate close to the arc plate are fixedly connected to vertical plates, elastic ropes are fixedly connected between the two vertical plates and the arc plate, and a top rod is fixedly connected to the middle of the arc plate.

[0012] As another improvement of the present application, an intermediate tube is fixedly connected to the middle of the top of the turntable, and a plurality of evenly distributed branch tubes are fixedly connected to the side wall of the bottom end of the intermediate tube, and the plurality of branch tubes correspond one to one to the plurality of push rods.

[0013] As another improvement of the present application, one end of the push rod is fixedly connected to a secondary piston, and the secondary piston is slidingly connected to the branch pipe seal.

[0014] As another improvement of the present application, the inner wall of the intermediate tube is slidingly connected to the main piston, hydraulic oil is filled between the main piston and the secondary piston, a tension spring is fixedly connected between the top of the main piston and the inner wall of the top of the intermediate tube, an alarm is fixedly connected to the top of the intermediate tube, a tension sensor is fixedly connected between the tension spring and the main piston, and the tension sensor and the alarm are electrically connected.

[0015] In summary, the present invention achieves rapid centering of the workpiece before machining by cooperating between the fixture and the fine-tuning platform to clamp the workpiece, combined with the movement function of the positioning drive table and the precise adjustment mechanism of the push rod under the rotating core, significantly improving machining accuracy, avoiding machining offsets caused by initial deviations, and improving the consistency and qualified rate of the finished product. The rotatable leveling shaft structure is used to drive the push rod outward through centrifugal force, pushing the fine-tuning platform to achieve position correction. When the positioning drive platform fails to align accurately, error compensation is automatically completed, thereby enhancing the system's anti-deviation capability, reducing manual intervention, and improving automated positioning efficiency. When the rotor core rotates, it drives the base plate and fan blades to rotate, creating negative pressure to draw in external air. The air is then sent into the air duct through the wind frame and the blower pipe, supplying air to the fan and driving the drive shaft inside the mounting plate to rotate. This forms a power system that relies on the self-circulation of the rotor core for energy supply, reducing the use of additional motors, structural complexity, and energy consumption. Through the coordinated action of the arc plate, roller and push rod, the push rod drives the arc plate to move smoothly toward the fine-tuning platform under the centrifugal force, so that the push rod accurately pushes the platform to the center position, improving the transmission accuracy and stability of the positioning action and avoiding errors caused by structural vibration or excessive impact; Hydraulic oil is filled between the main and auxiliary pistons and cooperates with the tension spring to form a buffer structure. When the push rod fails to push the fine-tuning platform to the center position, the insufficient piston stroke causes the tension sensor feedback value to decrease, automatically triggering the alarm to send an alarm signal, which can clearly identify positioning failure and guide maintenance to prevent incorrect processing; A tensioning chamber is set under the fine-tuning platform, and the pressure plate is driven up and down by a telescopic rod. After the positioning adjustment is completed, the rough surface contact is pressed to prevent the platform from being displaced due to vibration or impact during the processing, effectively ensuring the stability of workpiece positioning and the consistency of processing dimensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the frame in the first embodiment of the present application; Figure 2 This is a front cross-sectional view of the air duct in the first and second embodiments of the present application; Figure 3 This is a front cross-sectional view of the intermediate pipe in the first and second embodiments of the present application; Figure 4 This is a front cross-sectional view of the wind frame in the first and second embodiments of the present application; Figure 5 This is a front cross-sectional view of the movable platform in the first and second embodiments of the present application; Figure 6 This is a top view of the arc plate in the second embodiment of the present application; Figure 7 This is a top view of multiple mounting plates in the second embodiment of the present application.

[0017] Description of the numbers in the figure: 1. Frame; 2. Machine head; 201. Rotating core; 3. Positioning drive platform; 4. Fine adjustment platform; 401. Movable platform; 402. Return spring; 403. Cross guide frame; 404. Tension chamber; 405. Telescopic rod; 406. Press plate; 5. Clamp; 6. Mounting plate; 601. Air duct; 602. Partition; 603. Drive shaft; 604. Air outlet; 605. Front drive wheel; 606. Air Fan; 7. Leveling shaft; 701. Turntable; 702. Middle pipe; 703. Push rod; 704. Branch pipe; 705. Auxiliary piston; 706. Main piston; 707. Roller; 708. Tension spring; 709. Warning device; 8. Wind frame; 801. Bottom plate; 802. Fan blades; 803. Air inlet; 804. Blowing pipe; 9. Arc plate; 901. Vertical plate; 902. Elastic rope; 903. Push rod. DETAILED DESCRIPTION

[0018] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0019] The first implementation method: Figure 1-Figure 5A hydraulic machine tool with a multi-stage positioning device is shown, comprising a frame 1, a machine head 2 fixedly connected to the top of the frame 1, a rotating core 201 installed at the bottom of the machine head 2, a positioning drive platform 3 fixedly connected to the top of the positioning drive platform 3, a fine-tuning platform 4 fixedly connected to the top of the fine-tuning platform 4, a fixture 5 fixedly connected to the top of the fixture 5 for clamping a workpiece, a plurality of evenly distributed mounting plates 6 fixedly connected to the inner side wall of the frame 1, a duct 601 fixedly connected to the top of the mounting plate 6, a partition 602 fixedly connected to the middle of the duct 601, a drive shaft 603 rotatably connected to the middle of the partition 602, and the drive shaft 60 3 is fixedly connected to the front transmission wheel 605, the top of the mounting plate 6 is rotatably connected to the leveling shaft 7, the top of the leveling shaft 7 is fixedly connected to the turntable 701, the middle of the leveling shaft 7 is fixedly connected to the secondary piston 705, the turntable 701 is located above the secondary piston 705, the front transmission wheel 605 and the secondary piston 705 are rotatably connected to the main piston 706, the top of the turntable 701 is slidably connected to a plurality of evenly distributed push rods 703, a processing area is set between the plurality of turntables 701, the center point of the processing area and the center point of the rotating core 201 are in the same straight line, the center point of the fine-tuning platform 4 and the center point of the clamp 5 are in the same straight line.

[0020] During operation, the workpiece is clamped on the fixture 5, and then the workpiece is driven by the positioning drive table 3 to move to the center point of the processing area for processing. At this time, the driving shaft 603 drives the leveling shaft 7 to rotate. When the leveling shaft 7 rotates, the push rod 703 extends outward under the action of centrifugal force. At this time, multiple push rods 703 can push the fine-tuning platform 4 to move to the center point of the processing area. Since the center point of the processing area and the center point of the rotating core 201 are on the same line, the workpiece can be positioned. Starting the rotating core 201 can process the workpiece. If the positioning of the positioning drive table 3 deviates, the push rod 703 can play a role in positioning and adjusting the workpiece.

[0021] The second implementation method: Figure 2-Figure 7 A hydraulic machine tool with a multi-stage positioning device is shown. Different from the first embodiment, the bottom end of the machine head 2 is fixedly connected to a wind frame 8, which is sleeved on the outside of the rotating core 201. The outer wall of the rotating core 201 is fixedly connected to a bottom plate 801, and the bottom end of the bottom plate 801 is fixedly connected to a plurality of evenly distributed fan blades 802. The outer wall of the wind frame 8 is fixedly connected to a plurality of evenly distributed blowing pipes 804, and the plurality of blowing pipes 804 correspond one-to-one to the plurality of air ducts 601, and one end of the blowing pipe 804 is located directly above the air duct 601. An air inlet hole 803 is provided at the bottom end of the wind frame 8, and a fan 606 is fixedly connected to the top of the drive shaft 603. The side wall of the air duct 601 is provided with a plurality of air outlet holes 604, and the air outlet holes 604 are located on the upper side of the partition 602.

[0022] Through the above-mentioned arrangement, when the rotating core 201 rotates, it can drive the base plate 801 to rotate. When the base plate 801 rotates, the fan blades 802, under the action of centrifugal force, allow air to be sucked into the interior of the wind frame 8 from the air inlet hole 803, and discharged to the interior of the air duct 601 through multiple blowing pipes 804. The wind entering the interior of the air duct 601 can drive the fan 606 to rotate, and the fan 606 provides power for the rotation of the drive shaft 603. Through the above-mentioned arrangement, when the rotating core 201 rotates, it can drive the drive shaft 603 to rotate.

[0023] The fine-tuning platform 4 includes a movable platform 401 , a plurality of evenly distributed return springs 402 are fixedly connected between the movable platform 401 and the positioning drive platform 3 , and a cross guide frame 403 is fixedly connected between the movable platform 401 and the positioning drive platform 3 .

[0024] Through the above arrangement, the movable platform 401 and the positioning drive platform 3 are movably connected, so that the push rod 703 can push the movable platform 401 for adjustment.

[0025] A tensioning chamber 404 is provided inside the movable platform 401, a telescopic rod 405 is fixedly connected to the top of the positioning drive platform 3, and a pressure plate 406 is fixedly connected to the output end of the telescopic rod 405. The pressure plate 406 is located on the inner side of the tensioning chamber 404, and the bottom surfaces of the tensioning chamber 404 and the pressure plate 406 are respectively set to rough surfaces.

[0026] Through the above arrangement, when adjusting the position of the movable platform 401, the telescopic rod 405 is started to separate the pressure plate 406 from the tensioning chamber 404. At this time, the position of the movable platform 401 can be adjusted. When the adjustment of the movable platform 401 is completed, the telescopic rod 405 drives the pressure plate 406 to move downward, so that the pressure plate 406 and the tensioning chamber 404 are tightly attached together, which plays a role in fixing the movable platform 401 and preventing the workpiece from shaking during the processing.

[0027] The top of the mounting plate 6 is slidably connected to the arc plate 9, one end of the push rod 703 is fixedly connected to the roller 707, the roller 707 is attached to the side of the arc plate 9, both ends of the mounting plate 6 close to the arc plate 9 are fixedly connected to the vertical plates 901, an elastic rope 902 is fixedly connected between the two vertical plates 901 and the arc plate 9, and the middle part of the arc plate 9 is fixedly connected to the top rod 903.

[0028] When the push rod 703 rotates, the roller 707 pushes the arc plate 9 to move toward the movable platform 401, so that the push rod 903 contacts the movable platform 401. Through the above arrangement, the push rod 703 indirectly pushes the movable platform 401 through the push rod 903 for adjustment, thereby improving the stability of the adjustment of the movable platform 401.

[0029] An intermediate tube 702 is fixedly connected to the middle of the top of the turntable 701, and a plurality of evenly distributed branch tubes 704 are fixedly connected to the side wall of the bottom end of the intermediate tube 702. The plurality of branch tubes 704 correspond to a plurality of push rods 703 one by one. A secondary piston 705 is fixedly connected to one end of the push rod 703. The secondary piston 705 is sealingly and slidingly connected to the branch tube 704. A main piston 706 is slidingly connected to the inner wall of the intermediate tube 702. Hydraulic oil is filled between the main piston 706 and the secondary piston 705. A tension spring 708 is fixedly connected between the top of the main piston 706 and the inner wall of the top end of the intermediate tube 702. An alarm 709 is fixedly connected to the top of the intermediate tube 702. A tension sensor is fixedly connected between the tension spring 708 and the main piston 706. The tension sensor and the alarm 709 are electrically connected.

[0030] Through the above arrangement, when the push rod 703 rotates, it can drive the main piston 706 to move downward. When the push rod 703 can push the movable table 401 to the center point of the processing area, the tension value received by the tension sensor is fixed. When the push rod 703 cannot push the movable table 401 to the center point of the processing area, the distance that the main piston 706 moves downward becomes shorter, and the tension value received by the tension sensor is reduced. At this time, the tension sensor sends a signal to the alarm 709 to alarm it. The above arrangement can issue an alarm when the workpiece cannot be centered, and promptly remind the staff to perform maintenance.

[0031] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A hydraulic machine tool with a multi-stage positioning device, comprising a frame (1), a machine head (2) fixedly connected to the top end of the frame (1), a rotating core (201) mounted on the bottom end of the machine head (2), and a positioning drive platform (3) fixedly connected to the bottom end of the frame (1), characterized in that: The top of the positioning drive platform (3) is fixedly connected to a fine-tuning platform (4), the top of the fine-tuning platform (4) is fixedly connected to a clamp (5), the clamp (5) is used to clamp a workpiece, the inner side wall of the frame (1) is fixedly connected to a plurality of evenly distributed mounting plates (6), the top of the mounting plate (6) is fixedly connected to an air duct (601), the middle of the air duct (601) is fixedly connected to a partition (602), the middle of the partition (602) is rotatably connected to a drive shaft (603), the bottom end of the drive shaft (603) is fixedly connected to a front drive wheel (605), and the top of the mounting plate (6) is rotatably connected to a leveling shaft (7). The top of the leveling shaft (7) is fixedly connected to a turntable (701), the middle of the leveling shaft (7) is fixedly connected to a secondary piston (705), the turntable (701) is located above the secondary piston (705), a main piston (706) is rotatably connected between the front drive wheel (605) and the secondary piston (705), the top of the turntable (701) is slidably connected to a plurality of evenly distributed push rods (703), a processing area is set between the plurality of turntables (701), the center point of the processing area and the center point of the rotating core (201) are on the same straight line, and the center point of the fine-tuning platform (4) and the center point of the clamp (5) are on the same straight line.

2. A hydraulic machine tool with a multi-stage positioning device according to claim 1, characterized in that: The bottom end of the machine head (2) is fixedly connected to a wind frame (8), the wind frame (8) is sleeved on the outside of the rotating core (201), the outer wall of the rotating core (201) is fixedly connected to a bottom plate (801), and the bottom end of the bottom plate (801) is fixedly connected to a plurality of evenly distributed fan blades (802).

3. The hydraulic machine tool with a multi-stage positioning device according to claim 2, characterized in that: The outer wall of the wind frame (8) is fixedly connected to a plurality of evenly distributed blowing pipes (804), the plurality of blowing pipes (804) correspond one-to-one to the plurality of air ducts (601), and one end of the blowing pipe (804) is located directly above the air duct (601), and an air inlet hole (803) is provided at the bottom end of the wind frame (8).

4. The hydraulic machine tool with a multi-stage positioning device according to claim 3, characterized in that: The top end of the driving shaft (603) is fixedly connected to a fan (606), and the side wall of the air duct (601) is provided with a plurality of air outlet holes (604), and the air outlet holes (604) are located on the upper side of the partition (602).

5. The hydraulic machine tool with a multi-stage positioning device according to claim 1, characterized in that: The fine-tuning platform (4) comprises a movable platform (401), a plurality of evenly distributed return springs (402) are fixedly connected between the movable platform (401) and the positioning drive platform (3), and a cross guide frame (403) is fixedly connected between the movable platform (401) and the positioning drive platform (3).

6. The hydraulic machine tool with a multi-stage positioning device according to claim 5, characterized in that: A tensioning chamber (404) is provided inside the movable platform (401), a telescopic rod (405) is fixedly connected to the top end of the positioning drive platform (3), a pressing plate (406) is fixedly connected to the output end of the telescopic rod (405), and the pressing plate (406) is located inside the tensioning chamber (404). The bottom surfaces of the tensioning chamber (404) and the pressing plate (406) are respectively configured as rough surfaces.

7. The hydraulic machine tool with a multi-stage positioning device according to claim 1, characterized in that: The top end of the mounting plate (6) is slidably connected to an arc plate (9), one end of the push rod (703) is fixedly connected to a roller (707), the roller (707) is in contact with the side of the arc plate (9), both ends of the mounting plate (6) close to the arc plate (9) are fixedly connected to vertical plates (901), an elastic rope (902) is fixedly connected between the two vertical plates (901) and the arc plate (9), and a top rod (903) is fixedly connected to the middle of the arc plate (9).

8. The hydraulic machine tool with a multi-stage positioning device according to claim 7, characterized in that: The middle portion of the top of the turntable (701) is fixedly connected to an intermediate tube (702), and the side wall of the bottom end of the intermediate tube (702) is fixedly connected to a plurality of evenly distributed branch tubes (704), and the plurality of branch tubes (704) correspond one to one to the plurality of push rods (703).

9. The hydraulic machine tool with a multi-stage positioning device according to claim 8, characterized in that: One end of the push rod (703) is fixedly connected to a secondary piston (705), and the secondary piston (705) is sealed and slidably connected to the branch pipe (704).

10. The hydraulic machine tool with a multi-stage positioning device according to claim 9, characterized in that: The inner wall of the intermediate tube (702) is slidably connected to a main piston (706), the space between the main piston (706) and the auxiliary piston (705) is filled with hydraulic oil, a tension spring (708) is fixedly connected between the top end of the main piston (706) and the inner wall of the top end of the intermediate tube (702), an alarm (709) is fixedly connected to the top end of the intermediate tube (702), a tension sensor is fixedly connected between the tension spring (708) and the main piston (706), and the tension sensor and the alarm (709) are electrically connected.

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