A gantry-type vertical and horizontal composite machining center

Abstract

This utility model relates to the field of machine tool technology, and in particular to a gantry-type vertical-horizontal composite machining center, comprising a crossbeam; two columns symmetrically fixed to the lower part of the crossbeam, forming a gantry structure; each column is a frame structure with a vertical moving cavity in the middle and several first sliders at the bottom for mounting on the machine tool's guide rails; a first servo motor is located at the bottom of the vertical moving cavity inside the column, and a gear is connected to the output end of the first servo motor, the gear extending from the bottom of the column for meshing with a rack on the machine tool; four vertically arranged guide rails are provided on the side wall of the column, a horizontal machining slide is provided inside the vertical moving cavity, and several second sliders are provided on the side wall of the horizontal machining slide, the second sliders being mounted on the corresponding guide rails of the column. This utility model combines a vertical milling machine and a horizontal milling machine, allowing four milling cutters to process simultaneously, enabling simultaneous processing of the workpiece's vertical and side surfaces, ensuring the perpendicularity of the vertical and side surface processing, and improving processing efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, and more specifically, to a gantry-type vertical and horizontal composite machining center. Background Technology

[0002] A machine tool is a mechanical device that processes metal or other materials into parts or products of required shapes, sizes, and surface qualities through various methods such as cutting, grinding, casting, forging, welding, stamping, and extrusion. It can precisely machine workpieces according to predetermined programs and requirements to meet the precision, quality, and production efficiency demands of different industrial sectors. A milling machine is a machine tool that uses a milling cutter to mill workpieces. Through the rotation of the milling cutter and the feed motion of the workpiece (or the milling machine table), excess material is removed from the workpiece, thereby producing parts with various complex shapes such as planes, grooves, gears, threads, and splined shafts. Milling machines are widely used in many industrial fields, including machinery manufacturing, mold making, aerospace, and automobile manufacturing.

[0003] Most existing milling machines are either horizontal or vertical, and there are no products that combine horizontal and vertical machining capabilities. Workpieces are typically machined on a vertical or horizontal milling machine first, and then moved to another horizontal or vertical milling machine for further processing, which affects both efficiency and accuracy. Therefore, there is an urgent need for a gantry-type vertical-horizontal composite machining center to achieve multi-face machining in a single setup, thereby improving efficiency and accuracy. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a gantry-type vertical and horizontal composite machining center that integrates vertical and horizontal machining functions, thereby improving machining efficiency and accuracy.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A gantry-type vertical and horizontal composite machining center, comprising:

[0007] beam;

[0008] Two uprights symmetrically fixed to the lower part of the crossbeam form a gantry structure.

[0009] Each of the columns is a frame structure with a vertical moving cavity in the middle and several first sliders at the bottom for mounting on the machine tool's guide rail;

[0010] The bottom of the vertical moving cavity inside the column is provided with a first servo motor, and the output end of the first servo motor is connected to a gear. The gear extends from the bottom of the column and is used to mesh with the rack on the machine tool.

[0011] The column sidewall is provided with four vertically arranged guide rails, the vertical moving cavity is provided with a horizontal machining slide, the sidewall of the horizontal machining slide is provided with a number of second sliders, and the second sliders are installed on the guide rails corresponding to the column.

[0012] The column sidewall is provided with a drive mechanism, and the nut seat on the drive mechanism is fixedly connected to the horizontal machining slide through a connecting plate;

[0013] The horizontal machining slide is provided with an installation groove inside, and a power machining unit is provided in the installation groove. The power machining unit is connected to the horizontal machining slide through a guide rail and a second slider.

[0014] A drive mechanism is provided on one side of the power processing unit, and the nut seat on the drive mechanism is fixedly connected to the horizontal processing slide through a connecting plate;

[0015] The crossbeam is a frame structure with a horizontal moving cavity in the middle, and two horizontally arranged guide rails are provided on its top and the lower part of its inner sidewall.

[0016] The horizontal moving cavity is provided with two vertical machining slides, and the side wall of the vertical machining slides is provided with several second sliders, which are installed on the corresponding guide rails on the crossbeam.

[0017] A drive mechanism is fixedly installed on the top of the crossbeam, and the nut seat on the drive mechanism is fixedly connected to the vertical machining slide through a connecting plate.

[0018] The vertical machining slide has an internal mounting groove, and a power machining unit is installed in the mounting groove. The power machining unit is connected to the horizontal machining slide through a guide rail and a second slider.

[0019] A drive mechanism is provided on one side of the power processing unit, and the nut seat on the drive mechanism is fixedly connected to the vertical processing slide through a connecting plate.

[0020] Furthermore, both the beams and columns are manufactured using a one-piece casting process.

[0021] Furthermore, the drive mechanism includes a second servo motor, a coupling, a lead screw, a connecting plate, a bearing seat, and a lead screw nut seat. Both ends of the lead screw are fixedly mounted on the column via the bearing seats. One end of the lead screw is connected to the second servo motor via the coupling. An adjustable lead screw nut seat is mounted on the lead screw. A connecting plate is connected to the lead screw nut seat. The connecting plate is fixedly connected to the horizontal machining slide.

[0022] Furthermore, the power processing unit includes a slide block, which is disposed in a mounting groove and is slidably connected to the inner wall of the mounting groove via a guide rail and a second slider. A main shaft is disposed inside the slide block, a milling cutter head is disposed at the front end of the main shaft, and a main shaft bracket is disposed at the rear end of the main shaft. The drive mechanism is disposed at the bottom of the slide block, and a drive motor is disposed on the upper side of the slide block. The drive motor is adjustably connected to the slide block via a motor bracket, and a pulley is mounted on the output end of the drive motor. The pulley is connected to the main shaft via a synchronous belt.

[0023] Furthermore, a hydraulic balancing cylinder is provided on the side wall of the column, the piston rod of the hydraulic balancing cylinder is fixedly connected to the column, and the cylinder body of the hydraulic balancing cylinder is fixedly connected to the horizontal machining slide.

[0024] Two hydraulic balance cylinders are provided on the upper side of the vertical machining slide. The piston rod of the hydraulic balance cylinder is fixedly connected to the top of the power machining unit through the top frame, and the cylinder body of the hydraulic balance cylinder is fixedly connected to the vertical machining slide.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. This utility model combines a vertical milling machine and a horizontal milling machine, which can simultaneously process the vertical and side surfaces of a workpiece. Four milling cutter heads can process simultaneously, ensuring the perpendicularity of the vertical and side surface processing, thus improving both processing efficiency and accuracy.

[0027] 2. With the configuration of four power processing units, the workpiece can be processed on four precision surfaces simultaneously with only one clamping operation, ensuring the consistency of processing dimensions and processing efficiency.

[0028] 3. In this utility model, both the crossbeam and the column are made by integral casting, which has higher strength than the welded structure and enhances the overall structural strength of the machine tool.

[0029] 4. The hydraulic balance cylinder in this utility model can move together with the horizontal machining slide and the power machining unit, and can balance most of the weight. During vertical feed, the influence of the weight of the horizontal machining slide and the spindle on the second servo motor and the lead screw on the drive mechanism, as well as the influence of the weight of the power machining unit on the servo motor and the lead screw, is minimized, making the transmission more sensitive and the response better. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0031] Figure 2 This is a schematic diagram of the structure of the column in this utility model.

[0032] Figure 3This is a schematic diagram of the column structure from another angle in this utility model.

[0033] Figure 4 This is a partial structural diagram of the column in this utility model.

[0034] Figure 5 This is a schematic diagram of the crossbeam structure in this utility model.

[0035] Figure 6 This is a schematic diagram of the crossbeam from another angle in this utility model.

[0036] Figure 7 This is a top view of the crossbeam in this utility model.

[0037] Figure 8 This is a schematic diagram of the horizontal machining slide and the power machining unit in this utility model.

[0038] Figure 9 This is a schematic diagram of the power processing unit in this utility model.

[0039] Figure 10 This is a schematic diagram of the bottom structure of the power processing unit in this utility model.

[0040] Figure 11 This is a cross-sectional view of the power processing unit in this utility model.

[0041] Figure 12 This is a schematic diagram of the vertical machining slide and the power machining unit in this utility model.

[0042] Figure 13 This is a schematic diagram of the vertical machining slide and power machining unit from another angle in this utility model.

[0043] Figure 14 This is a schematic diagram of the bottom structure of the vertical machining slide and the power machining unit in this utility model.

[0044] Figure 15 This is a partial cross-sectional view of the power processing unit in this utility model.

[0045] In the diagram: 1. Column; 2. Horizontal beam; 3. Guide rail; 4. Vertical moving cavity;

[0046] 5. Power processing unit; 51. Drive motor; 52. Motor bracket; 53. Milling cutter head; 54. Ram; 55. Spindle; 56. Synchronous belt; 57. Pulley; 58. Spindle frame;

[0047] 6. Horizontal machining slide; 7. Hydraulic balance cylinder; 8. First servo motor;

[0048] 9. Drive mechanism; 91. Second servo motor; 92. Coupling; 93. Lead screw; 94. Connecting plate; 95. Bearing housing; 96. Lead screw nut housing;

[0049] 10. First slider; 11. Gear; 12. Horizontal moving cavity; 13. Vertical machining slide; 14. Mounting slot; 15. Second slider; 16. Top frame. Detailed Implementation

[0050] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0051] Example:

[0052] like Figures 1 to 15 As shown, a gantry-type vertical and horizontal composite machining center includes...

[0053] Horizontal beam 2;

[0054] Two columns 1, symmetrically fixed to the lower part of the crossbeam 2, form a gantry structure;

[0055] Each column 1 has a frame structure with a vertical moving cavity 4 in the middle and several first sliders 10 at the bottom for mounting on the guide rail 3 of the machine tool. Since the column 1 has a frame structure, the horizontal machining slide 6 moves in the middle position of the column 1, so that the column 1 has good strength and can better support the horizontal machining slide 6.

[0056] The bottom of the vertical moving cavity 4 inside the column 1 is provided with a first servo motor 8. The output end of the first servo motor 8 is connected to a gear 11. The gear 11 extends from the bottom of the column 1 to mesh with the rack on the machine tool, thereby driving the gantry to move on the machine tool through the first servo motor 8.

[0057] The column 1 has four vertically arranged guide rails 3 on its side wall, and a horizontal machining slide 6 is provided in the vertical moving cavity 4. The horizontal machining slide 6 has several second sliders 15 on its side wall. The second sliders 15 are installed on the guide rails 3 corresponding to the column 1 so that the horizontal machining slide 6 can move vertically.

[0058] A drive mechanism 9 is provided on the side wall of the column 1. The lead screw 96 on the drive mechanism 9 is fixedly connected to the horizontal machining slide 6 through the connecting plate 94. The second servo motor 91 on the drive mechanism 9 drives the lead screw 93 to rotate, and the lead screw 93 drives the lead screw 96 to move, thereby enabling the horizontal machining slide 6 to move vertically.

[0059] The horizontal machining slide 6 has an internal mounting groove 14, and a power machining unit 5 is installed in the mounting groove 14. The power machining unit 5 is connected to the horizontal machining slide 6 through the guide rail 3 and the second slider 15.

[0060] A drive mechanism 9 is provided on one side of the power processing unit 5. The lead screw 96 on the drive mechanism 9 is fixedly connected to the horizontal processing slide 6 through the connecting plate 94. The second servo motor 91 on the drive mechanism 9 drives the lead screw 93 to rotate, so that the power processing unit 5 can move horizontally, thereby enabling the milling cutter on the power processing unit 5 to adjust the horizontal feed and process the workpiece.

[0061] The crossbeam 2 has a frame structure with a horizontal moving cavity 12 in the middle. Two horizontally arranged guide rails 3 are provided on its top and lower inner wall. Because the crossbeam 2 has a frame structure, the vertical machining slide 13 moves in the middle position of the crossbeam 2, which gives the crossbeam 2 better strength and can better support the vertical machining slide 13.

[0062] The horizontal moving cavity 12 is provided with two vertical processing slides 13. Several second sliders 15 are provided on the side wall of the vertical processing slides 13 and are installed on the corresponding guide rails 3 on the crossbeam 2, so that the vertical processing slides 13 can move horizontally.

[0063] A drive mechanism 9 is fixedly installed on the top of the crossbeam 2. The lead screw 96 on the drive mechanism 9 is fixedly connected to the vertical machining slide 13 through the connecting plate 94. The second servo motor 91 on the drive mechanism 9 drives the lead screw 93 to rotate, and the lead screw 93 drives the lead screw 96 to move, thereby enabling the vertical machining slide 13 to move horizontally.

[0064] The vertical machining slide 13 has an internal mounting groove 14, and a power machining unit 5 is installed in the mounting groove 14. The power machining unit 5 is connected to the horizontal machining slide 6 through the guide rail 3 and the second slider 15.

[0065] A drive mechanism 9 is provided on one side of the power processing unit 5. The lead screw 96 on the drive mechanism 9 is fixedly connected to the vertical processing slide 13 through the connecting plate 94. The second servo motor 91 on the drive mechanism 9 drives the lead screw 93 to rotate, so that the power processing unit 5 can move vertically, thereby enabling the milling cutter on the power processing unit 5 to adjust the vertical feed and process the workpiece.

[0066] This invention combines a vertical milling machine and a horizontal milling machine, enabling simultaneous processing of the workpiece's vertical and side surfaces. The four milling cutter heads 53 can process simultaneously, ensuring the perpendicularity of the vertical and side surface processing, thus improving both processing efficiency and accuracy.

[0067] This utility model is equipped with four power processing units 5. The workpiece only needs to be clamped once to process four precision surfaces at the same time, which ensures the consistency of processing dimensions and processing efficiency.

[0068] In this embodiment, both the beam 2 and the column 1 are made by integral casting, which has higher strength compared to welded structures.

[0069] See Figure 3 , Figure 4 In this embodiment, the drive mechanism 9 includes a second servo motor 91, a coupling 92, a lead screw 93, a connecting plate 94, a bearing seat 95, and a lead screw nut 96. Both ends of the lead screw 93 are fixedly mounted on the column 1 through the bearing seats 95. One end of the lead screw 93 is connected to the second servo motor 91 through the coupling 92. The second servo motor 91 serves as a power source, providing precise rotational power to drive the lead screw 93 to rotate. An adjustable lead screw nut 96 is mounted on the lead screw 93 to convert the rotational motion into linear motion, driving the horizontal machining slide 6 to move vertically. A connecting plate 94 is connected to the lead screw nut 96 and is fixedly connected to the horizontal machining slide 6. The connecting plate 94 is used to connect the lead screw nut 96 and the horizontal machining slide 6, transmitting the linear motion of the lead screw nut 96 to the horizontal machining slide 6.

[0070] In practical use, the second servo motor 91 transmits rotational power to the lead screw 93 via the coupling 92. The lead screw 93 rotates stably under the support of the bearing housing 95, driving the lead screw nut 96 to perform linear motion. The lead screw nut 96 is fixedly connected to the corresponding machining slide via the connecting plate 94, transmitting the linear motion to the corresponding machining slide. Driven by the lead screw nut 96, the corresponding machining slide moves linearly, thus machining the workpiece.

[0071] See Figures 8-11In this embodiment, the power processing unit 5 includes a slide 54, which is disposed in the mounting groove 14. The slide 54 serves as the main load-bearing component of the power processing unit 5, providing a mounting and support platform for the internal spindle 55 and other components. It is slidably connected to the inner wall of the mounting groove 14 via guide rails 3 and a second slider 15. The spindle 55 is located inside the slide 54, and a milling cutter head 53 is located at the front end of the spindle 55. The milling cutter head 53 is the component that directly processes the workpiece. The rotation of the spindle 55 drives the milling cutter head 53 to rotate, thereby achieving the cutting process on the workpiece. A spindle frame 58 is located at the rear end of the spindle 55, and a drive mechanism 9 is located at the bottom of the slide 54. The drive mechanism 9 provides power for the movement of the slide 54, driving the slide 54 to move vertically or horizontally within the mounting groove 14 according to the installation position, thereby adjusting the processing position of the milling cutter head 53. A drive motor 51 is mounted on the upper side of the slide 54. The drive motor 51 is tunably connected to the slide 54 via a motor bracket 52. The design of the motor bracket 52 allows for adjustable connection between the drive motor 51 and the slide 54, facilitating adjustment of the tension of the synchronous belt 56 between the drive motor 51 and the spindle 55, ensuring the stability and accuracy of power transmission. A pulley 57 is mounted on the output end of the drive motor 51. The pulley 57 is connected to the spindle 55 via the synchronous belt 56, transmitting the rotational power of the drive motor 51 to the spindle 55, driving the spindle 55 and the milling cutter head 53 to rotate for machining.

[0072] In this embodiment, a hydraulic balance cylinder 7 is provided on the side wall of the column 1. The piston rod of the hydraulic balance cylinder 7 is fixedly connected to the column 1, and the cylinder body of the hydraulic balance cylinder 7 is fixedly connected to the horizontal machining slide 6. Since the horizontal machining slide 6 and the machining spindle 55 mounted on it are relatively heavy, usually around one ton, the lead screw 93 needs to overcome a large weight when driving the horizontal machining slide 6. The cylinder body of the hydraulic balance cylinder 7 can move together with the horizontal machining slide 6 and can balance most of the weight. During vertical feed, the weight of the horizontal machining slide 6 and the spindle 55 has a minimal impact on the second servo motor 91 and the lead screw 93 on the drive mechanism 9, making the transmission more sensitive and the response better.

[0073] In addition, two hydraulic balance cylinders 7 are provided on the upper side of the vertical machining slide 13. The piston rods of the hydraulic balance cylinders 7 are fixedly connected to the top of the power machining unit 5 through the top frame 16, and the cylinder bodies of the hydraulic balance cylinders 7 are fixedly connected to the vertical machining slide 13. Since the vertical machining slide 13 and the power machining unit 5 installed inside it are relatively heavy, usually around one ton, the lead screw 93 needs to overcome a large weight when driving the power machining unit 5. The piston rods of the hydraulic balance cylinders 7 can move together with the power machining unit 5 and can balance most of the weight. During vertical feed, the influence of the weight of the power machining unit 5 on the servo motor and the lead screw 93 is minimized, making the transmission more sensitive and the response better.

[0074] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0075] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0076] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A gantry-type vertical and horizontal composite machining center, characterized in that: include Crossbeam (2); Two columns (1) are symmetrically fixed to the lower part of the crossbeam (2) to form a gantry structure; Each of the columns (1) is a frame structure with a vertical moving cavity (4) in the middle and several first sliders (10) at the bottom for mounting on the guide rail (3) of the machine tool; The bottom of the vertical moving cavity (4) inside the column (1) is provided with a first servo motor (8), and the output end of the first servo motor (8) is connected to a gear (11). The gear (11) extends from the bottom of the column (1) to mesh with the rack on the machine tool. The column (1) has four vertically arranged guide rails (3) on its side wall, and a horizontal machining slide (6) is provided in the vertical moving cavity (4). The horizontal machining slide (6) has several second sliders (15) on its side wall, and the second sliders (15) are installed on the guide rails (3) corresponding to the column (1). The column (1) is provided with a drive mechanism (9) on its side wall. The nut seat (96) on the drive mechanism (9) is fixedly connected to the horizontal machining slide (6) through a connecting plate (94). The horizontal machining slide (6) is provided with an installation groove (14), and a power machining unit (5) is provided in the installation groove (14). The power machining unit (5) is connected to the horizontal machining slide (6) through a guide rail (3) and a second slider (15). The power processing unit (5) is provided with a drive mechanism (9) on one side. The nut seat (96) on the drive mechanism (9) is fixedly connected to the horizontal processing slide (6) through the connecting plate (94). The crossbeam (2) is a frame structure with a horizontal moving cavity (12) in the middle, and two horizontally arranged guide rails (3) on its top and lower inner wall. The horizontal moving cavity (12) is provided with two vertical processing slides (13). The side wall of the vertical processing slides (13) is provided with several second sliders (15), which are installed on the corresponding guide rails (3) on the crossbeam (2). A drive mechanism (9) is fixedly installed on the top of the crossbeam (2), and the nut seat (96) on the drive mechanism (9) is fixedly connected to the vertical machining slide (13) through the connecting plate (94); The vertical machining slide (13) is provided with an installation groove (14), and a power machining unit (5) is provided in the installation groove (14). The power machining unit (5) is connected to the horizontal machining slide (6) through the guide rail (3) and the second slider (15). The power processing unit (5) is provided with a drive mechanism (9) on one side. The nut seat (96) on the drive mechanism (9) is fixedly connected to the vertical processing slide (13) through the connecting plate (94).

2. The gantry-type vertical and horizontal composite machining center according to claim 1, characterized in that: Both the crossbeam (2) and the column (1) are made by integral casting.

3. The gantry-type vertical and horizontal composite machining center according to claim 1, characterized in that: The drive mechanism (9) includes a second servo motor (91), a coupling (92), a lead screw (93), a connecting plate (94), a bearing seat (95), and a lead screw nut seat (96). The two ends of the lead screw (93) are fixedly mounted on the column (1) through the bearing seat (95). One end of the lead screw (93) is connected to the second servo motor (91) through the coupling (92). An adjustable lead screw nut seat (96) is mounted on the lead screw (93). A connecting plate (94) is connected to the lead screw nut seat (96). The connecting plate (94) is fixedly connected to the horizontal machining slide (6).

4. The gantry-type vertical and horizontal composite machining center according to claim 1, characterized in that: The power processing unit (5) includes a slide (54), which is located in the mounting groove (14). It is slidably connected to the inner wall of the mounting groove (14) through the guide rail (3) and the second slider (15). The slide (54) is equipped with a spindle (55). The front end of the spindle (55) is equipped with a milling cutter head (53). The rear end of the spindle (55) is equipped with a spindle frame (58). The drive mechanism (9) is located at the bottom of the slide (54). The upper side of the slide (54) is equipped with a drive motor (51). The drive motor (51) is tunably connected to the slide (54) through a motor bracket (52). The output end of the drive motor (51) is equipped with a pulley (57). The pulley (57) is connected to the spindle (55) through a synchronous belt (56).

5. The gantry-type vertical and horizontal composite machining center according to claim 1, characterized in that: A hydraulic balance cylinder (7) is provided on the side wall of the column (1). The piston rod of the hydraulic balance cylinder (7) is fixedly connected to the column (1), and the cylinder body of the hydraulic balance cylinder (7) is fixedly connected to the horizontal machining slide (6). Two hydraulic balance cylinders (7) are provided on the upper side of the vertical machining slide (13). The piston rod of the hydraulic balance cylinder (7) is fixedly connected to the top of the power machining unit (5) through the top frame (16), and the cylinder body of the hydraulic balance cylinder (7) is fixedly connected to the vertical machining slide (13).

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