A numerical control machine tool for processing ball pins

Abstract

The present invention relates to a numerically controlled machine tool for processing ball pins. A spindle box, a tool rest saddle assembly, a tailstock sliding device, and a B-axis and U-axis mechanism are respectively provided on the upper surface of the machine bed. The spindle box is fixedly connected to the machine bed. The tailstock sliding device is slidably connected to the machine bed through a W-axis drive system. The workpiece is clamped between the hydraulic chuck of the spindle box and the tailstock center. The B-axis and U-axis mechanism is located on one side of the outer periphery of the workpiece, and the B-axis and U-axis mechanism is connected to the machine bed through a B-axis saddle assembly. The B-axis saddle assembly moves along the X2 direction, and the rotation axis of the B-axis and U-axis mechanism is perpendicular to the rotation axis of the electric spindle. A tool is provided at the other end of the workpiece, and the tool moves laterally along the Z1 direction through the tool rest saddle assembly via a Z1-axis drive system. This numerically controlled machine tool for processing ball pins has a reasonable layout and a compact structure. Multiple processes of the ball pin can be completed in one clamping, meeting the processing requirements of ball pin parts in related industries such as the automotive industry and greatly improving the processing efficiency.

Description

Technical Field

[0001] The present invention relates to a numerical control machine tool for processing ball head pins, belonging to the technical field of special part processing equipment. Background Art

[0002] Currently, the ball head pin processing equipment manufactured in China is all single-process processing. For a ball head pin workpiece, multiple pieces of equipment are required to complete the processing together. Not only does the equipment occupy a large area, but the processing efficiency is also low. Since the ball head pin workpiece is usually small, it is difficult to arrange the mechanism for a single machine tool to complete multi-process processing. It is necessary to avoid interference and ensure sufficient rigidity and accuracy, which is difficult to design, resulting in domestic equipment being difficult to meet the requirements. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a numerical control machine tool for processing ball head pins. In this numerical control machine tool for processing ball head pins, the rod turning and thread turning are processed by a front tool rest assembly, and the spherical surface turning and spherical surface rolling are processed by a rear B-axis U-axis assembly. The other functional components of the machine tool are reasonably arranged with a compact structure, and multi-process processing of the ball head pin can be completed in one clamping, meeting the processing requirements of ball head pin parts in related industries such as the automotive industry and greatly improving the processing efficiency.

[0004] To solve the above problems, the specific technical solution of the present invention is as follows: A numerical control machine tool for processing ball head pins is provided with a spindle box, a tool rest saddle assembly, a tailstock sliding device, and a B-axis U-axis mechanism on the upper surface of the bed body respectively; the spindle box is fixedly connected to the bed body, and the electric spindle in the spindle box is connected to a hydraulic chuck; the tailstock sliding device is slidably connected to the bed body through a W-axis transmission system, and the tailstock center of the tailstock sliding device is coaxially arranged with the electric spindle of the spindle box, and the tailstock sliding device moves along the W-axis direction parallel to the axis of the electric spindle, and the workpiece is clamped between the hydraulic chuck and the tailstock center; the B-axis U-axis mechanism is located on one side of the outer circumference of the workpiece, and the B-axis U-axis mechanism is connected to the bed body through a B-axis saddle assembly. The B-axis saddle assembly moves along the X2 direction, and the rotation axis of the B-axis U-axis mechanism is perpendicular to the rotation axis of the electric spindle; a tool is provided at the other end of the workpiece, and the tool moves horizontally along the Z1 direction through a Z1-axis transmission system of the tool rest saddle assembly, and at the same time, the tool moves obliquely along the X1 direction on the tool rest saddle assembly.

[0005] The B-axis saddle assembly includes an X2-axis transmission system and a Z2-axis transmission system; wherein the Z2-axis transmission system is connected to the bed body, and the running direction of the Z2-axis transmission system is parallel to the axis direction of the electric spindle; the X2-axis transmission system is located above the Z2-axis transmission system and is connected to the slider of the Z2-axis transmission system. The running direction of the X2-axis transmission system is perpendicular to the Z2-axis transmission system, and the slider of the X2-axis transmission system is connected to the B-axis mechanism.

[0006] The described tool rest saddle assembly includes a Z1-axis drive system and an X1-axis drive system; the running direction of the Z1-axis drive system is parallel to the axis direction of the main shaft; a tool rest saddle is connected to the slider of the Z1-axis drive system, and the tool rest drives the tool to move up and down on the surface of the tool rest saddle through the X1-axis drive system.

[0007] The sliding surface of the described tool rest saddle in contact with the tool is at an angle of 45° with the horizontal plane.

[0008] The structure of the B-axis U-axis mechanism is as follows: a B-axis servo motor is provided above the main housing, a tool holder is connected to the front of the main housing through a front base, a U-axis motor is provided at the rear end of the main housing, and the main shaft is supported by bearings in the main housing; among them, the B-axis servo motor is connected to the main shaft through a B-axis rotary drive device, a connecting seat is provided on the outer circumference of the front end of the main shaft, and both sides of the connecting seat are symmetrically connected to the front base through linear guides, and the tool holder is arranged on the front base; the main shaft is of a hollow structure, a pull rod is provided in the inner cavity, a pull block is provided at the front end of the pull rod, and the rear end of the pull rod is connected to the U-axis motor through a U-axis linear drive device; inclined racks I are provided on both sides of the pull block, and inclined racks II are provided at the corresponding positions of the tool holder, and the inclined rack II is in transmission cooperation with the inclined rack I.

[0009] The structure of the described B-axis rotary drive device is as follows: a pulley II is connected to the outer circumference of the main shaft through a key, and the pulley II is in transmission connection with a pulley I connected to the output shaft of the B-axis servo motor through a synchronous belt.

[0010] The structure of the described U-axis linear drive device is as follows: the output shaft of the U-axis motor is connected to a lead screw through a coupling, a nut is in threaded cooperation with the lead screw, the outer circumference of the nut is connected to a bearing block, and the inner ring of the bearing block is connected to the rear end of the pull rod.

[0011] The described tool holder is connected to the main shaft through a front base and a rear base in sequence, and the diameter of the rear base is larger than that of the front base; a support block is provided on the rear base, three guide rods are provided on the support block, a spring is provided on each guide rod, the top of the spring supports in the corresponding inner hole of the front base, and the bottom of the spring supports on the limit platform of the guide rod; the support direction of the spring is the same as the tool force direction.

[0012] Guide sleeves are provided at both ends inside the described main shaft, and the inner wall of the guide sleeve is in sliding fit with the pull rod.

[0013] A chip conveyor is provided on the bed, and the outlet of the chip conveyor is far from the machining position of the workpiece.

[0014] The ball head pin processing numerical control machine tool of this application adopts the above structure and has the following advantages:

[0015] 1) In this application, the spindle box is installed on the left side of the bed body, the tool rest saddle assembly is installed directly in front, the B-axis saddle and the tailstock are installed at the rear. The B-axis mechanism is installed on the B-axis saddle, and the U-axis is installed at the front end of the B-axis. This structural layout enables efficient and stable machining of parts and can ensure the machining accuracy of products.

[0016] 2) The spindle box is installed on the left side of the bed body, and an electric spindle and a hydraulic chuck are installed inside. The spindle can drive the chuck to rotate. At the same time, a blanking port is designed at the connection part between the spindle box and the bed body, and the workpiece can be directly recycled after machining, saving machining time.

[0017] 3) The tool rest saddle assembly is installed on the bed body and is driven by the Z1-axis drive system to achieve overall left and right movement. The tool rest is fixed above the saddle through a slide plate and is driven by the X1-axis drive system to drive the tool rest to move, thereby driving the tool to move.

[0018] 4) The tailstock is installed at the rear of the bed body and is driven by the W-axis drive system to drive the tailstock to move left and right. A center is installed at the front end of the tailstock, and the workpiece can be tightened during the movement of the tailstock.

[0019] 5) The B-axis saddle assembly is installed at the rear of the bed body and is driven by the Z2-axis drive system to achieve left and right movement.

[0020] 6) The B-axis rotary drive device is installed on the B-axis saddle and is driven by the X2-axis drive system installed on the B-axis saddle, which can drive the B-axis rotary drive device to move back and forth. The B-axis rotary drive device includes parts such as a B-axis motor, a B-axis spindle box, a B-axis belt, and a B-axis spindle. The B-axis motor can drive the spindle to rotate through a belt, and then drive the tool at the front end to achieve a rotating action.

[0021] 7) The U-axis linear drive device is installed inside the B-axis spindle box. Through the U-axis linear drive device installed at the end of the B-axis spindle box, the internal transmission rod can be driven to move. A rack is installed at the front end of the transmission rod and meshes with the rack installed at the base end. The tool is installed on the base, and when the transmission rod moves, it can drive the base to move, thereby driving the tool to achieve up and down movement in the U-axis direction. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of a CNC machine tool for ball head pin machining.

[0023] Figure 2 It is a schematic diagram of the overall B-axis saddle.

[0024] Figure 3 It is a schematic diagram of the overall part of the tool rest saddle assembly.

[0025] Figure 4It is a sectional view of the B-axis and U-axis mechanism.

[0026] Figure 5 It is Figure 4 A-A sectional view of

[0027] Figure 6 It is Figure 4 The enlarged detail view of

[0028] Figure 7 It is Figure 6 B-B sectional view of Detailed implementation manner

[0029] As Figures 1 to 3 shown, a numerical control machine tool for processing ball head pins has the following structure: It is characterized in that: on the upper surface of the bed 1, there are respectively arranged a spindle box 2, a tool rest saddle assembly 3, a tailstock sliding device 5 and a B-axis and U-axis mechanism 6; the spindle box 2 is fixedly connected to the bed 1, and the electric spindle in the spindle box 2 is connected to a hydraulic chuck 10; the tailstock sliding device 5 is slidably connected to the bed 1 through a W-axis transmission system, and the tailstock center of the tailstock sliding device 5 is coaxially arranged with the electric spindle of the spindle box 2, and the tailstock sliding device 5 moves along the W-axis direction parallel to the axis of the electric spindle, and the workpiece is clamped between the hydraulic chuck 10 and the tailstock center; the B-axis and U-axis mechanism 6 is located on one side of the outer periphery of the workpiece, and the B-axis and U-axis mechanism 6 is connected to the bed 1 through a B-axis saddle assembly 4, the B-axis saddle assembly 4 moves along the X2 direction, and the rotation axis of the B-axis and U-axis mechanism 6 is perpendicular to the rotation axis of the electric spindle; on the other end of the workpiece, there is a tool, and the tool moves horizontally along the Z1 direction through a Z1-axis transmission system 11 of the tool rest saddle assembly 3, and at the same time, the tool moves obliquely along the X1 direction on the tool rest saddle assembly 3.

[0030] The said B-axis saddle assembly 4 includes an X2-axis transmission system 4-1 and a Z2-axis transmission system 4-2; among them, the Z2-axis transmission system 4-2 is connected to the bed 1, and the running direction of the Z2-axis transmission system 4-2 is parallel to the axis direction of the electric spindle; the X2-axis transmission system 4-1 is located above the Z2-axis transmission system 4-2 and is connected to the slider of the Z2-axis transmission system 4-2, the running direction of the X2-axis transmission system 4-1 is perpendicular to the Z2-axis transmission system 4-2, and the slider of the X2-axis transmission system 4-1 is connected to the B-axis mechanism 6.

[0031] The said tool rest saddle assembly 3 includes a Z1-axis transmission system 3-1 and an X1-axis transmission system 3-2; the running direction of the Z1-axis transmission system 3-1 is parallel to the axis direction of the spindle; on the slider of the Z1-axis transmission system 3-1, a tool rest saddle 3-3 is connected, and the tool rest saddle 3-3 drives a tool holder 3-4 to move up and down on the surface of the tool rest saddle 3-3 through the X1-axis transmission system 3-2.

[0032] The sliding surface of the said tool rest saddle 3-3 in contact with the tool holder 3-4 forms a 45° angle with the horizontal plane.

[0033] As Figure 4 and Figure 5 shown, the structure of the B-axis and U-axis mechanism 6 is as follows: Above the main housing 6-9, there is a B-axis servo motor 6-1. In front of the main housing 6-9, there is a tool holder 6-13 connected through a front base 6-12. At the rear end of the main housing 6-9, there is a U-axis motor 6-14. Inside the main housing 6-9, the main shaft 6-5 is supported by bearings; among them, the B-axis servo motor 6-1 is connected to the main shaft 6-5 through a B-axis rotary transmission device. On the outer circumference of the front end of the main shaft 6-5, there is a connecting seat 6-11. The two sides of the connecting seat are symmetrically connected to the front base 6-12 through linear guide rails 6-24. The tool holder 6-13 is arranged on the front base 6-12; the main shaft 6-5 is of a hollow structure, and a pull rod 6-18 is arranged in the inner cavity. At the front end of the pull rod 6-18, there is a pull block 6-19. The rear end of the pull rod 6-18 is connected to the U-axis motor 6-14 through a U-axis linear transmission device; on both sides of the pull block 6-19, there are inclined racks I 6-20. At the corresponding position of the tool holder 6-13, there is an inclined rack II 6-21. The inclined rack II 6-21 is in transmission cooperation with the inclined rack I 6-20.

[0034] The structure of the B-axis rotary transmission device is as follows: On the outer circumference of the main shaft 6-5, a pulley II 6-6 is connected through a key. The pulley II 6-6 is in transmission connection with a pulley I 6-3 connected to the output shaft of the B-axis servo motor 6-1 through a synchronous belt 6-4.

[0035] The structure of the U-axis linear transmission device is as follows: The output shaft of the U-axis motor 6-14 is connected to a lead screw 6-7 through a coupling. A nut 6-16 is in threaded fit with the lead screw 6-7. The outer circumference of the nut 6-16 is connected to a bearing block 6-17. The inner ring of the bearing block 6-17 is connected to the rear end of the pull rod 6-18.

[0036] As Figure 6 and Figure 7 shown, the tool holder 6-13 is connected to the main shaft 6-5 through a front base 6-25 and a rear base 6-26 in sequence, and the diameter of the rear base 6-26 is larger than that of the front base 6-25; on the rear base 6-26, there is a support block 6-27. On the support block 6-27, three guide rods 6-28 are arranged. On each guide rod 6-28, there is a spring 6-29. The top of the spring 6-29 supports in the corresponding inner hole of the front base 6-25, and the bottom of the spring 6-29 supports on the limit platform of the guide rod 6-28; the supporting direction of the spring 6-29 is the same as the tool force direction.

[0037] At both ends inside the main shaft 6-5, there are guide sleeves 6-22. The inner wall of the guide sleeve 6-22 is in sliding fit with the pull rod 6-18.

[0038] On the bed body 1, there is a chip conveyor 8, and the outlet of the chip conveyor 8 is far from the workpiece machining position.

Claims

1. A numerical control machine tool for processing ball pins, Characterized in that: On the upper surface of the bed body (1), there are respectively arranged a spindle box (2), a tool rest saddle assembly (3), a tailstock sliding device (5), and a B-axis U-axis mechanism (6); the spindle box (2) is fixedly connected to the bed body (1), and the electric spindle in the spindle box (2) is connected to a hydraulic chuck (10); the tailstock sliding device (5) is slidably connected to the bed body (1) through a W-axis transmission system, and the tailstock center of the tailstock sliding device (5) is coaxially arranged with the electric spindle of the spindle box (2), and the tailstock sliding device (5) moves along the W-axis direction parallel to the axis of the electric spindle, and the workpiece is clamped between the hydraulic chuck (10) and the tailstock center; the B-axis U-axis mechanism (6) is located on one side of the outer periphery of the workpiece, and the B-axis U-axis mechanism (6) is connected to the bed body (1) through a B-axis saddle assembly (4), the B-axis saddle assembly (4) moves along the X2 direction, and the rotation axis of the B-axis U-axis mechanism (6) is perpendicular to the rotation axis of the electric spindle; the other end of the workpiece is provided with a tool, the tool is connected to the tool rest saddle assembly (3) and moves laterally along the Z1 direction through a Z1-axis transmission system, and at the same time the tool obliquely moves along the X1 direction on the tool rest saddle assembly (3); the B-axis saddle assembly (4) includes an X2-axis transmission system (4-1) and a Z2-axis transmission system (4-2); wherein the Z2-axis transmission system (4-2) is connected to the bed body (1), and the running direction of the Z2-axis transmission system (4-2) is parallel to the axis direction of the electric spindle; the X2-axis transmission system (4-1) is located above the Z2-axis transmission system (4-2) and is connected to the slider of the Z2-axis transmission system (4-2), the running direction of the X2-axis transmission system (4-1) is perpendicular to the Z2-axis transmission system (4-2), and the slider of the X2-axis transmission system (4-1) is connected to the B-axis U-axis mechanism (6); the tool rest saddle assembly (3) includes a Z1-axis transmission system (3-1) and an X1-axis transmission system (3-2); the running direction of the Z1-axis transmission system (3-1) is parallel to the axis direction of the spindle; a tool rest saddle (3-3) is connected to the slider of the Z1-axis transmission system (3-1), and the tool rest saddle (3-3) drives a tool holder (3-4) to obliquely move along the X1 direction on the surface of the tool rest saddle (3-3) through the X1-axis transmission system (3-2); the structure of the B-axis U-axis mechanism (6) is: a B-axis servo motor (6-1) is arranged above the main housing (6-9), a tool holder (6-13) is arranged in front of the main housing (6-9), a U-axis motor (6-14) is arranged at the rear end of the main housing (6-9), and a main shaft (6-5) is supported in the main housing (6-9) through bearings; wherein the B-axis servo motor (6-1) is connected to the main shaft (6-5) through a B-axis rotation transmission device, a front base (6-25) and a rear base (6-26) are arranged on the outer circumference of the front end of the main shaft (6-5), the rear base (6-26) is connected to the front base (6-25) through a linear guide (6-24), and the tool holder (6-13) is arranged on the front base (6-25).The main shaft (6-5) is of a hollow structure, and a pull rod (6-18) is arranged in the inner cavity. A pull block (6-19) is arranged at the front end of the pull rod (6-18), and the rear end of the pull rod (6-18) is connected to a U-axis motor (6-14) through a U-axis linear drive device; on both sides of the pull block (6-19), there are inclined racks I (6-20), and at the corresponding positions of the tool holder (6-13), there are inclined racks II (6-21), and the inclined racks II (6-21) are in meshing transmission with the inclined racks I (6-20).; 2. The numerical control machine tool for processing ball pins according to claim 1, Characterized in that: The sliding surface where the tool rest saddle (3-3) contacts the tool rest (3-4) forms a 45° angle with the horizontal plane.

3. The numerical control machine tool for processing ball pins according to claim 1, Characterized in that: The structure of the B-axis rotary drive device is: A pulley II (6-6) is connected to the outer circumference of the main shaft (6-5) through a key connection. The pulley II (6-6) is connected to a pulley I (6-3) connected to the output shaft of the B-axis servo motor (6-1) through a synchronous belt (6-4) for transmission connection.

4. The numerical control machine tool for processing ball pins according to claim 1, Characterized in that: The structure of the U-axis linear drive device is: The output shaft of the U-axis motor (6-14) is connected to a lead screw (6-7) through a coupling. A nut (6-16) is in threaded fit with the lead screw (6-7). The outer circumference of the nut (6-16) is connected to a bearing block (6-17). The inner ring of the bearing block (6-17) is connected to the rear end of a pull rod (6-18).

5. The numerical control machine tool for processing ball pins according to claim 1, Characterized in that: The tool holder (6-13) is sequentially connected to the main shaft (6-5) through a front base (6-25) and a rear base (6-26), and the diameter of the rear base (6-26) is larger than that of the front base (6-25); A support block (6-27) is provided on the rear base (6-26). Three guide rods (6-28) are provided on the support block (6-27). A spring (6-29) is provided on each guide rod (6-28). The top of the spring (6-29) is supported in the corresponding inner hole of the front base (6-25), and the bottom of the spring (6-29) is supported on the limiting platform of the guide rod (6-28); The supporting direction of the spring (6-29) is the same as the tool force direction.

6. The numerical control machine tool for processing ball pins according to claim 1, Characterized in that: Guide sleeves (6-22) are provided at both ends inside the main shaft (6-5). The inner wall of the guide sleeve (6-22) is in sliding fit with the pull rod (6-18).

7. The numerical control machine tool for processing ball pins according to claim 1, Characterized in that: A chip conveyor (8) is provided on the machine bed (1), and the outlet of the chip conveyor (8) is far from the workpiece processing position.

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