Vertical double-head turning, drilling and milling combined machine tool
By integrating milling and turning functions on a vertical lathe, two machining operations can be performed on a single setup, solving the problems of low efficiency and difficulty in guaranteeing accuracy in traditional CNC lathes. This improves machining efficiency and accuracy while reducing equipment costs and floor space.
Patent Information
- Application Number
- CN202511964021.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-01-23
AI Technical Summary
Traditional single-column CNC lathes have low processing efficiency, difficulty in guaranteeing accuracy, cumbersome production processes, and high equipment costs, making it difficult to meet the needs of integrated processing.
Design a vertical double-head turning, drilling and milling composite machining center, integrating turning, milling and turning functions on the same vertical lathe, with the left and right columns having independent movement in the X and Z axes, so that the workpiece can be processed in one clamping.
It improves processing efficiency, avoids positioning deviations caused by transfer clamping, enhances processing accuracy and equipment utilization, and reduces floor space.
Smart Images
Figure CN121374162A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of milling and pinning machine tool technology, specifically relating to a vertical double-head turning, drilling, and milling composite machining tool. Background Technology
[0002] In the field of machining, CNC lathes are key equipment for achieving precision machining of parts and are widely used in industries such as automotive, aerospace, and construction machinery. For parts that require multiple machining processes such as turning, drilling, tapping, and milling at both ends, traditional machining methods mainly rely on single-column CNC lathes.
[0003] However, traditional single-column CNC lathes have many technical drawbacks in practical applications: First, they have low processing efficiency. Due to the limitations of the machine tool structure, parts need to be clamped twice during processing, which not only increases clamping time but also makes it difficult to guarantee processing accuracy. The positioning errors generated during the second clamping process can easily cause problems such as dimensional deviations and out-of-tolerance geometric tolerances, affecting the product qualification rate. Second, the production process is cumbersome. In the traditional processing mode, turning and drilling processes are separated, requiring multiple processing equipment with different functions. Parts need to be transferred between multiple machines and clamped multiple times, which not only prolongs the production cycle but also increases equipment purchase costs and floor space. At the same time, the cumulative errors generated by multiple clamping further aggravate the fluctuation of part processing accuracy. Third, existing equipment cannot meet the needs of integrated processing. Currently, there is a lack of equipment on the market that can integrate turning and drilling functions and complete multiple processing steps at both ends of the workpiece in one clamping. It cannot meet the needs of modern manufacturing for efficient, high-precision, and compact processing equipment, thus restricting the improvement of production efficiency and the reduction of processing costs. Summary of the Invention
[0004] This invention provides a vertical double-head turning, drilling, and milling composite machining center, integrating turning and milling with pin turning on the same vertical lathe. Both the turning and milling heads have bidirectional mobility in the X and Z axes, and their movements are independent of each other. Only one workpiece clamping is required to complete both milling and pin turning on the same machine tool. This achieves the independent completion of milling and pin turning on a compact machine tool, meeting the requirements for efficient and continuous workpiece machining. This invention solves the problems of single-column CNC lathes only being able to complete a single machining mode, requiring secondary workpiece transfer and clamping, resulting in low machining efficiency and insufficient continuity; and increasing the machine tool table and footprint.
[0005] To achieve the above-mentioned technical objectives, the present invention is implemented through the following technical solution: A vertical double-head turning, drilling, and milling combined machining center includes: Base; The workpiece clamping disc is movably disposed within the base via a clamping disc drive assembly; The main column is located on the upper surface of the rear side of the base; The left column is located on the left side of the main column, and the left column has a horizontal degree of movement relative to the main column. The right column is located on the right side of the main column, and the right column also has a horizontal degree of movement relative to the main column. The pin drive block is mounted on the right column and has a vertical movement relative to the right column; A milling pin drive block is disposed on the left column and has a vertical movement relative to the left column; The pin plate is movably positioned below the pin drive block; The milling cutter mounting head is movably positioned below the milling pin drive block.
[0006] Preferably, the clamping disk drive assembly includes: The workpiece clamping disc drive motor is located on the rear side of the chassis; The transmission gear is coaxially mounted on the shaft of the drive motor of the workpiece clamping disc. The transmission disc is coaxially mounted on the rotating shaft below the workpiece clamping disc; A transmission belt is disposed on the transmission gear and the transmission disk; the transmission gear drives the transmission belt to transmit, the transmission belt drives the transmission disk to drive, and the transmission disk drives the workpiece clamping disk to rotate.
[0007] Preferably, at least two sets of X-axis column guide rails are arranged laterally on the contact surface between the integral main column and the left and right columns, and at least one set of X-axis column guide rails is arranged on the upper side of the integral main column. Slider blocks are provided on the contact surfaces of the left and right columns with the back and top sides of the overall large column, and the sliders are movably embedded in the X-axis column guide rail. The components used to drive the left and right columns to move along the X-axis include: The chassis frame is horizontally mounted on the main column, with one set of each of the left and right columns; X-axis drive motor, and a set of X-axis drive motors is provided on the first side of each set of chassis frames; Each X-axis drive motor is provided with a lead screw, the first end of which is provided, and the second end of which is rotatably provided on the second side of the chassis frame. Each set of the lead screws is provided with a set of sliding blocks through threaded engagement; the two sets of sliding blocks are respectively provided on the back side of the left column and the right column.
[0008] Preferably, a set of Z-axis drive motors is provided at the upper end of the left column and the right column, and the first end of the lead screw is vertically provided on the rotor of the Z-axis drive motor, and the second ends of the two sets of lead screws are respectively rotatably provided at the lower end of the left column and the lower end of the right column. The two sets of lead screws are respectively equipped with turning drive blocks and milling drive blocks through threaded engagement.
[0009] Preferably, at least two sets of Z-axis column guide rails are provided on the front of the left column and the right column respectively; sliders are provided on the contact side of the turning drive block and the milling drive block with the right column and the left column, and the sliders provided on the two sets of drive blocks are respectively movably embedded in the Z-axis column guide rails on the corresponding columns.
[0010] Preferably, a motor housing is provided on the front of the turning pin drive block, a turning disc motor is provided above the motor housing, and a turning disc is rotatably provided below the motor housing via a rotating shaft. The rotor of the turning disc motor is provided on the rotating shaft. Under the drive of the turning disc motor, the turning disc can generate rotational drive.
[0011] Preferably, a milling pin drive frame is provided on the milling pin drive block, and a hydraulic cylinder is provided above the milling pin drive frame. The telescopic movable end of the hydraulic cylinder is located inside the milling pin drive frame and is located above the cutter head drive motor box provided inside the milling pin drive frame; a milling cutter mounting head is provided on the rotor at the lower end of the cutter head drive motor box.
[0012] Preferably, a milling cutter magazine is provided on the outward-facing side of the milling pin drive frame; the milling cutter magazine includes: Tool magazine drive box; A disc is disposed on the side of the tool magazine drive box. Several sets of tool storage chambers are arranged along the circumference inside the disc. A tool outlet is opened on the lower side of the disc. The shift crossbar is mounted in the tool magazine drive box via a pivot at its intersection point; tool-holding slots are provided at all four ends of the shift crossbar; two tool-holding slots on the same straight line are located at the tool outlet and the milling cutter mounting head, respectively.
[0013] Preferably, the base has a hollow structure inside, which can be used to collect the debris generated by the milling pin; Two sets of chip removal boxes are provided on the rear side of the base, and each set of chip removal boxes is provided with a chip removal channel that communicates with the inside of the base. Each of the two sets of chip removal boxes is equipped with a negative pressure pump for sucking up debris from the base.
[0014] Preferably, a nitrogen balance cylinder is provided on the rear side of the integral large column. The nitrogen balance cylinder is connected to two sets of pneumatic columns. The telescopic ends of each set of pneumatic columns are respectively provided on the turning drive block and the milling pin drive block to assist the turning drive block and the milling pin drive block in moving in the vertical direction.
[0015] The beneficial effects of this invention are: On the same vertical machining center, two machining heads, one for milling and the other for turning and pinning, are integrated, and each set of machining heads has independent movement control drive in the X and Z axes. Only one clamping is required on the workpiece to complete both machining operations; there is no need to transfer and re-clamp the workpiece midway. Milling and pinning operations on the workpiece are continuous, improving machining efficiency. It is particularly suitable for machining high-precision workpieces, avoiding positioning deviations caused by transferring and re-clamping the workpiece, which could affect the final workpiece accuracy standard. Based on the main body of the column-type machine tool, the left and right double-headed columns have mobility in the X and Z axes, forming a moving column structure. Compared with the traditional fixed column structure, it is more outstanding in heavy cutting and precision feeding, and has a better vibration suppression effect, improving the stability of cutting. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a structural schematic diagram from a front and side view of the present invention; Figure 2 This is a schematic diagram of the structure from two perspectives: front and side views. Figure 3 This is a top-down view of the structure of the present invention from a side perspective; Figure 4 This is a schematic diagram of the bottom view structure of the present invention; Figure 5 This is a schematic diagram of the workpiece clamping disk driving structure of the present invention; Figure 6 This is a schematic diagram of the bottom front structure of the present invention; Figure 7 This is a schematic diagram of the overall structure of the back side of the present invention; Figure 8 This is a schematic diagram of the milling cutter disc magazine structure of the present invention; Figure 9 This is a schematic diagram of the milling cutter mounting head and its driving structure of the present invention.
[0018] In the attached diagram, the structural names represented by each number are as follows: 1-Base, 2-Integral main column, 3-Left column, 4-Right column, 5-Turning pin drive block, 6-Milling pin drive block, 7-Workpiece clamping disc, 701-Transmission disc, 702-Transmission belt, 703-Transmission gear, 704-Workpiece clamping disc drive motor, 8-Z-axis column guide rail, 801-Z-axis lead screw, 9-Z-axis drive motor, 10-Chip box, 1001-Chip removal channel, 11-X-axis column guide rail 1101-X-axis drive motor, 12-turning disc, 1201-turning pin disc motor, 13-milling cutter mounting head, 1301-hydraulic cylinder, 1302-cutter head drive motor box, 1303-milling pin drive frame, 14-milling cutter disc magazine, 1401-disc, 1402-tool storage compartment, 1403-tool magazine drive box, 1404-shifting crossbar, 1405-tool locking slot, 15-nitrogen balance cylinder. Detailed Implementation
[0019] 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.
[0020] Example 1 A vertical double-head turning, drilling and milling composite machining tool includes: a base 1 with an internal cavity structure and an open upper surface; a workpiece clamping plate 7 is set in the middle of the base 1; three sets of elastic clamping jaws are set on the workpiece clamping plate 7; the three sets of clamping jaws are set at equal angular intervals; the workpiece to be processed is placed between the three sets of clamping jaws for clamping the workpiece to be processed. The workpiece clamping disk 7 is mounted inside the base 1 via a clamping disk drive assembly, such as... Figure 5 As shown, the clamping disk drive assembly in this embodiment includes: a workpiece clamping disk drive motor 704 disposed on the rear side of the base 1; a transmission gear 703 coaxially disposed on the rotating shaft of the workpiece clamping disk drive motor 704; a rotating shaft disposed below the workpiece clamping disk 7; a transmission disk 701 disposed at the lower end of the rotating shaft and coaxially disposed with the rotating shaft; and a transmission belt 702 disposed on the transmission gear 703 and the transmission disk 701. The workpiece clamping disk drive motor 704 drives the transmission gear 703 to rotate. The transmission gear 703 and the transmission disk 701 are meshed with the transmission belt 702. Driven by the power source of the transmission gear 703, the transmission belt 702 and the transmission disk 701 can be synchronously driven. The transmission disk 701 can also drive the rotating shaft to rotate. The rotating shaft drives the workpiece clamping disk 7 to rotate, thereby synchronously driving the workpiece to be processed on the workpiece clamping disk 7 to rotate. like Figure 1 As shown, a large integral column 2 is located on the upper surface of the base 1, near the rear side of the base 1. The installation connection structure between the base and the large integral column 2 is as follows: a mounting plate is installed on the rear side of the upper surface of the base 1, and the large integral column 2 is fixed to the mounting plate with bolts; the large integral column 2 spans from one side of the base 1 to the other side, and its width is the same as that of the base 1; a left column 3 is located on the front of the large integral column 2, near the left side of the large integral column 2, and the left column 3 has free horizontal movement relative to the large integral column 2; similarly, a right column 4 is located on the front of the large integral column 2, near the right side of the large integral column 2, and the right column 4 also has free horizontal movement relative to the large integral column 2; as shown... Figure 2 as well as Figure 3 As shown, the free-moving structure between the left column 3 and the right column 4 and the overall large column 2 is set as follows: Two sets of X-axis column guide rails 11 are horizontally arranged on the front of the main column 2, that is, on the contact surface between the left column 3 and the right column 4 and the main column 2. One set of X-axis column guide rails 11 is located on the upper side of the main column 2. Slider blocks are located on the back side of the left column 3 and the right column 4, corresponding to the positions of the two sets of X-axis column guide rails 11. The sliders are movably embedded in the X-axis column guide rails 11. The upper ends of the left column 3 and the right column 4 are both set as protruding parts of triangular prisms, with the bottom surface of the triangular prism protrusions facing the upper side of the main column 2. Similarly, sliders are also set on the lower side of the triangular prism protrusions at the upper ends of the left column 3 and the right column 4. These sliders are also movably embedded in the X-axis column guide rails 11 on the upper side of the main column 2. By setting three sets of X-axis column guide rails 11 and sliders that cooperate with the X-axis column guide rails 11, the left column 3 and the right column 4 have free sliding relative to the main column 2. The sliding movement of the left column 3 and the right column 4 is driven by electronic control, such as... Figure 2 As shown, the electronic control components used to drive the left column 3 and the right column 4 include: A chassis frame is horizontally mounted on the front of the main column 2. A set of these frames is provided for each of the left and right columns 3 and 4. The electric drives of the left and right columns 3 and 4 are independent and do not interfere with each other. Each set of chassis frames has an X-axis drive motor 1101 on its first side. A lead screw is located at the end of the shaft of the X-axis drive motor 1101. The second end of the lead screw is rotatably mounted on the second side of the chassis frame via a rotating bearing sleeve. A sliding block is movably mounted on the lead screw via a threaded connection. The sliding blocks in each set are respectively located on the rear side of the left and right columns 3 and 4. The X-axis drive motor 1101 controls the rotation of the lead screw, which causes the sliding blocks to move laterally relative to the lead screw. This movement of the sliding blocks provides the power source, causing the left and right columns 2 and 4 to move laterally, thus achieving the electric drive of the left and right columns 3 and 4. like Figure 1 As shown, a milling pin drive block 6 is provided on the front of the left column 3, and the milling pin drive block 6 has vertical freedom of movement relative to the left column 3; a turning pin drive block 5 is provided on the front of the right column 4, and the turning pin drive block 5 also has vertical freedom of movement relative to the right column 4; the movement structure of the milling pin drive block 6 and the turning pin drive block 5 relative to the left column 3 and the right column 4 is set as follows: Two sets of Z-axis column guide rails 8 are provided on the front surfaces of the left column 3 and right column 4, that is, on the contact surfaces between them and the milling pin drive block 6 and the turning pin drive block 5. The two sets of Z-axis column guide rails 8 on the two columns are vertically positioned close to the left and right sides of the front surface of the columns. Two sets of sliders are correspondingly provided on the back surfaces of the milling pin drive block 6 and the turning pin drive block 5, directly opposite the two sets of Z-axis column guide rails 8. The Z-axis column guide rails 8 and the sliders allow the milling pin drive block 6 and the turning pin drive block 5 to connect to the left column 3 and the right column 4 respectively, while also having vertical up-and-down movement. The electronically controlled drive components of the milling pin drive block 6 and the turning pin drive block 5 are configured as follows: A Z-axis drive motor 9 is installed at the upper end of both the left column 3 and the right column 4. The first end of the lead screw is vertically connected to the rotor of each Z-axis drive motor 9. The second ends of the two lead screws are rotatably installed at the lower ends of the left column 3 and the right column 4 respectively through the shaft bearing sleeve. The back side of the milling pin drive block 6 and the turning pin drive block 5 passes vertically through the two lead screws and maintains a threaded engagement with the lead screws. When the two Z-axis drive motors 9 on the left and right columns are running, they drive the two lead screws to rotate. The rotation of the two lead screws can drive the milling pin drive block 6 and the turning pin drive block 5 to move up and down in the vertical direction respectively. like Figure 2As shown, a turning pin disk 12 is movably arranged below the turning pin drive block 5. A motor box is arranged on the front of the turning pin drive block 5. A turning pin disk motor 1201 is arranged above the motor box. The turning pin disk 12 is rotatably arranged below the motor box via a rotating shaft. The rotor of the turning pin disk motor 1201 is connected to the upper end of the rotating shaft, and the lower end of the rotating shaft is connected to the turning pin disk 12. The turning pin disk motor 1201 is driven and can synchronously drive the turning pin disk 12 to rotate via the rotating shaft. The turning pin disk motor 1201 is a servo motor, and the speed of the turning pin disk motor 1201 can be adjusted to control the turning processing speed. like Figure 9 As shown, a milling pin drive frame 1303 is provided on the front of the milling pin drive block 6, and the milling pin drive frame 1303 is connected and fixed to the milling pin drive block 6 by bolts; a hydraulic cylinder 1301 is provided above the milling pin drive frame 1303, and the telescopic movable end of the hydraulic cylinder 1301 is located inside the milling pin drive frame 1303 and is provided above the cutter head drive motor box 1302 provided inside the milling pin drive frame 1303. A milling cutter mounting head 13 is provided on the rotor at the lower end of the cutter head drive motor box 1302; under the drive of the hydraulic cylinder 1301, the cutter head drive motor box 1302 and the milling cutter mounting head 13 have vertical extension or retraction bounce; and the milling cutter mounting head 13 can rotate under the control of the cutter head drive motor box 1302; thereby driving the cutter head to rotate, realizing the milling of the pin; As a preferred embodiment, such as Figure 8As shown, a milling cutter disc magazine 14 is provided on the outward side of the milling pin drive frame 1303. The milling cutter disc magazine 14 includes: a tool magazine drive box 1403; an electronically controlled drive assembly located within the tool magazine drive box 1403; a disc 1401 located on the side of the tool magazine drive box 1403; several sets of tool storage chambers 1402 located within the disc 1401 and distributed circumferentially; each set of tool storage chambers 1402 holds a set of milling pin heads; a tool exit point is provided on the lower side of the disc 1401; the tool magazine drive box 1403... The motor-controlled disc 1401 inside the tool magazine 3 rotates. When the tool storage chamber 1402 containing the milling cutter model to be used rotates to the tool outlet, the milling cutter inside the tool magazine drive box 1403 disengages from the tool storage chamber 1402. A shifting crossbar 1404 is located below the tool magazine drive box 1403. The intersection of the shifting crossbar 1404 is connected to the tool magazine drive box 1403 via a rotating shaft, and the motor inside the tool magazine drive box 1403 drives the shifting crossbar 1404 to rotate. The four ends of the shifting crossbar 1404... Both slots 1405 are provided, allowing the milling pin head to be securely locked in. The two slots 1405, located on the same straight line, are positioned at the tool exit and the milling cutter mounting head 13, respectively. The milling pin head, detached from the tool storage chamber 1402, falls onto the slot 1405. The shifting crossbar 1404 rotates 180°, rotating the milling pin head to the milling cutter mounting head 13. The hydraulic cylinder 1301 then moves the milling cutter mounting head 13 downwards, mounting the milling pin head onto it. As the hydraulic cylinder... The air cylinder 1301 returns to its original position, and the milling cutter head is simultaneously driven upward to disengage from the tool slot 1405 at the end of the shift cross bar 1404. The milling cutter disc magazine is an existing structural component that is already maturely applied to milling machines for storing milling cutters and automatically replacing and installing the milling cutter heads. Those skilled in the art are capable of selecting, installing, and debugging the milling cutter disc magazine to achieve usability. Therefore, this embodiment will not describe the specific structure of the milling cutter disc magazine. The workpiece is clamped on the workpiece clamping plate 7. The workpiece is processed by either milling or turning. The left column 3 or the right column 4 moves to face the workpiece clamping plate 7. The turning drive block 5 or the milling drive block 6 moves up and down to control the vertical distance between the turning plate 12 or the milling cutter mounting head 13 and the workpiece, so that it can contact the workpiece to perform turning or milling.
[0021] Example 2 Based on Example 1, such as Figure 3As shown, a large amount of debris is generated during the turning and milling processes. This debris can fall into the cavity structure inside the base 1. In order to facilitate the unified collection of debris inside the base 1, two sets of chip removal boxes 10 are set on the rear side of the base 1. Both sets of chip removal boxes 10 are connected to the cavity structure inside the base 1 through chip removal channels. Each set of chip removal boxes 10 is equipped with a set of negative pressure pumps, which use negative pressure suction to collect the debris in the cavity of the base 1 through the chip removal channels into the chip removal box 10 for unified collection.
[0022] Example 3 Based on Example 1, such as Figure 3 As shown, a nitrogen balance cylinder 15 is installed on the rear side of the overall large column 2. The nitrogen balance cylinder 15 is connected to two sets of pneumatic columns through air pipes. The telescopic ends of each set of pneumatic columns are respectively installed on the turning drive block 5 and the milling pin drive block 6, which are used to assist the turning pin drive block 5 and the milling pin drive block 6 in moving in the vertical direction. By setting the nitrogen balance cylinder 15, the energy consumption of the drive motors of the turning pin drive block 5 and the milling pin drive block 6 can be reduced.
Claims
1. A vertical double-head turning, drilling, and milling combined machining center, characterized in that, include: Base; The workpiece clamping disc is movably disposed within the base via a clamping disc drive assembly; The main column is located on the upper surface of the rear side of the base; The left column is located on the left side of the main column, and the left column has a horizontal degree of movement relative to the main column. The right column is located on the right side of the main column, and the right column also has a horizontal degree of movement relative to the main column. The pin drive block is mounted on the right column and has a vertical movement relative to the right column; A milling pin drive block is disposed on the left column and has a vertical movement relative to the left column; The pin plate is movably positioned below the pin drive block; The milling cutter mounting head is movably positioned below the milling pin drive block.
2. The vertical double-head turning, drilling, and milling composite machining center according to claim 1, characterized in that, The clamping disk drive assembly includes: The workpiece clamping disc drive motor is located on the rear side of the chassis; The transmission gear is coaxially mounted on the shaft of the drive motor of the workpiece clamping disc. The transmission disc is coaxially mounted on the rotating shaft below the workpiece clamping disc; A transmission belt is disposed on the transmission gear and the transmission disc.
3. A vertical double-head turning, drilling, and milling composite machining center according to claim 1, characterized in that, At least two sets of X-axis column guide rails are arranged laterally on the contact surface between the main column and the left and right columns, and at least one set of X-axis column guide rails is arranged on the upper side of the main column. Slider blocks are provided on the contact surfaces of the left and right columns with the back and top sides of the overall large column, and the sliders are movably embedded in the X-axis column guide rail. The components used to drive the left and right columns to move along the X-axis include: The chassis frame is horizontally mounted on the main column, with one set of each of the left and right columns; X-axis drive motor, and a set of X-axis drive motors is provided on the first side of each set of chassis frames; Each X-axis drive motor is provided with a lead screw, the first end of which is provided, and the second end of which is rotatably provided on the second side of the chassis frame. Each set of the lead screws is provided with a set of sliding blocks through threaded engagement; the two sets of sliding blocks are respectively provided on the back side of the left column and the right column.
4. A vertical double-head turning, drilling, and milling composite machining center according to claim 1, characterized in that, Each of the left and right columns is equipped with a set of Z-axis drive motors at its upper end. The first end of the lead screw is vertically arranged on the rotor of the Z-axis drive motor, and the second ends of the two sets of lead screws are respectively rotatably arranged at the lower end of the left column and the lower end of the right column. The two sets of lead screws are respectively equipped with turning drive blocks and milling drive blocks through threaded engagement.
5. A vertical double-head turning, drilling, and milling composite machining center according to claim 4, characterized in that, At least two sets of Z-axis column guide rails are provided on the front of each of the left and right columns; sliders are provided on the contact sides of the turning drive block and the milling drive block with the right and left columns, and the sliders provided on the two sets of drive blocks are respectively movably embedded in the Z-axis column guide rails on the corresponding columns.
6. A vertical double-head turning, drilling, and milling composite machining center according to claim 1, characterized in that, The front of the turning pin drive block is provided with a motor box, the turning disc motor is provided above the motor box, and the turning disc is provided below the motor box via a rotating shaft. The rotor of the turning disc motor is provided on the rotating shaft.
7. A vertical double-head turning, drilling, and milling composite machining center according to claim 1, characterized in that, A milling pin drive frame is provided on the milling pin drive block, and a hydraulic cylinder is provided above the milling pin drive frame. The telescopic movable end of the hydraulic cylinder is located inside the milling pin drive frame and is located above the cutter head drive motor box provided inside the milling pin drive frame. A milling cutter mounting head is provided on the rotor at the lower end of the cutter head drive motor box.
8. A vertical double-head turning, drilling, and milling composite machining center according to claim 7, characterized in that, A milling cutter magazine is provided on the outward-facing side of the milling pin drive frame; the milling cutter magazine includes: Tool magazine drive box; A disc is disposed on the side of the tool magazine drive box. Several sets of tool storage chambers are arranged along the circumference inside the disc. A tool outlet is opened on the lower side of the disc. The shift crossbar is mounted in the tool magazine drive box via a pivot at its intersection point; tool-holding slots are provided at all four ends of the shift crossbar; two tool-holding slots on the same straight line are located at the tool outlet and the milling cutter mounting head, respectively.
9. A vertical double-head turning, drilling, and milling composite machining center according to claim 1, characterized in that, The base has an internal cavity structure, which can be used to collect the debris generated by the milling pin. Two sets of chip removal boxes are provided on the rear side of the base, and each set of chip removal boxes is provided with a chip removal channel that communicates with the inside of the base. Each of the two sets of chip removal boxes is equipped with a negative pressure pump for sucking up debris from the base.
10. A vertical double-head turning, drilling, and milling composite machining center according to claim 1, characterized in that, A nitrogen balance cylinder is installed on the rear side of the integral large column. The nitrogen balance cylinder is connected to two sets of pneumatic columns. The telescopic ends of each set of pneumatic columns are respectively set on the turning drive block and the milling pin drive block to assist the turning drive block and the milling pin drive block in moving in the vertical direction.