CN116871914B

CN116871914B - A double-column horizontal machining center

Info

Publication number: CN116871914B
Application number: CN202310934651.7A
Authority: CN
Inventors: 谢欣航
Original assignee: Tongxiang Shenghui Precision Machinery Co ltd
Current assignee: Tongxiang Shenghui Precision Machinery Co ltd
Priority date: 2023-07-27
Filing date: 2023-07-27
Publication date: 2025-08-26
Anticipated expiration: 2043-07-27
Also published as: CN116871914A

Abstract

The present application relates to the field of workpiece processing equipment, and in particular to a double-column horizontal machining center, comprising a bed, a workbench provided on the bed and for placing the workpiece, a column slidably connected to the bed to approach or move away from the workpiece, a column power unit provided on the bed and for moving the column, a spindle slidably connected to the column and for processing the workpiece, and a spindle power unit provided on the column and for moving the spindle. A frame is provided above the bed, the frame is slidably connected to a frame slide, the frame is provided with a frame slide power unit for driving the frame slide to move, the frame slide is provided with two clamping mechanisms that can clamp the workpiece, and the two clamping mechanisms are arranged along the moving direction of the frame slide, so that when one clamping mechanism moves the processed workpiece from the workbench, the other clamping mechanism can move the workpiece to be processed and place it on the workbench for processing, which can effectively improve the processing efficiency.

Description

Double-acting column horizontal machining center

Technical Field

The application relates to the field of workpiece processing equipment, in particular to a double-acting column horizontal type processing center.

Background

The horizontal machining center is a machining center with a horizontal spindle axis, and is different from the vertical machining center in that the horizontal machining center can only machine the vertical side surfaces around the workpiece, and cannot machine the top surface of the workpiece, so that the horizontal machining center is mainly used for machining box-type workpieces. In order to improve the machining efficiency, a double-acting column horizontal machining center has two columns, and the two columns are provided with main shafts for simultaneously machining two opposite side surfaces of a workpiece.

For example, in a conventional horizontal machining center with double-sided double-acting columns and CN203077015U, a box-type workpiece is placed on a turntable to be clamped, then two opposite sides of the workpiece are machined by driving corresponding spindles by two opposite upright posts, and after machining of the two sides is completed, the turntable drives the workpiece to rotate, so that the two spindles can correspondingly machine the other two sides of the workpiece.

For the related art, the workpiece is clamped on the turntable, and when the processing is completed, the workpiece needs to be removed from the turntable, and then a new workpiece to be processed is clamped on the turntable again, so that the middle part is left empty for a long time, and the processing efficiency is lower.

Disclosure of Invention

In order to improve the machining efficiency, the application provides a double-acting column horizontal machining center.

The application provides a double-acting column horizontal machining center which adopts the following technical scheme.

The utility model provides a horizontal machining center of double acting post, includes the lathe bed, locates the lathe bed and supplies the workstation that the work piece was placed, sliding connection in the lathe bed in order to be close to or keep away from the stand of work piece, locate the lathe bed and make the stand carry out the stand power division that removes, sliding connection in stand and carry out the main shaft of processing to the work piece, locate stand and make the main shaft remove main shaft power division, the lathe bed top is equipped with the support body, and support body sliding connection has a frame slide, and the support body is equipped with the frame slide power division that drives frame slide and remove, and the frame slide is equipped with two fixture that can carry out the centre gripping to the work piece, and two fixture sets up along the direction of movement of frame slide.

Through adopting above-mentioned technical scheme for after the work piece processing is accomplished, the frame slide removes, makes the fixture that the work piece that processing was accomplished corresponds keep away from the workstation, and the fixture that has centre gripping the work piece of waiting to process removes to the workstation directly over, makes the work piece unloading of processing completion can also carry out the material loading of waiting to process the work piece simultaneously, and both can go on simultaneously, in order to promote machining efficiency.

Optionally, the fixture includes fixed station, the vertical movement platform of sliding connection in fixed station along orientation workstation direction in fixed station, locate fixed station and drive vertical movement platform power part that moves, fixed connection in vertical movement platform's rotation motor, rotate connect in vertical movement platform and driven by rotation motor and carry out pivoted revolving stage, sliding connection in revolving stage and to two sets of clamping slide blocks of work piece centre gripping, locate the revolving stage and drive the clamping motor that clamping slide block removed, two sets of clamping slide blocks all carry out the centre gripping to the side all around of work piece.

Through adopting above-mentioned technical scheme, every clamping part homoenergetic carries out independent perpendicular moving and rotating corresponding the work piece of centre gripping for carry out the process of processing and take off the work piece of processing completion from fixture on work piece placement workbench and will wait to process the work piece and remove the operation of carrying out the centre gripping, can independently go on unaffected, and two sets of centre gripping sliders promote the stability to the work piece centre gripping.

Optionally, two groups the equal threaded connection of centre gripping slider has a two-way lead screw, and two-way lead screw can drive two centre gripping sliders of same group and be close to or keep away from mutually, and two-way lead screws one-to-one coaxial fixedly connected with worm wheel and worm, worm wheel meshing and worm, centre gripping motor output shaft coaxial detachable connection in the two-way lead screw that sets up the worm.

Through adopting above-mentioned technical scheme for two sets of centre gripping sliders can synchronous motion, make every fixture to the centre gripping of work piece can be better keep unanimous mutually, the work piece position is difficult for appearing the deviation, makes the work piece carry out accurate processing according to established procedure, helps promoting work piece processingquality.

Optionally, keep away from the two-way lead screw rotation of centre gripping motor is connected with the lead screw slider, and lead screw slider sliding connection is in order to make worm wheel be close to or keep away from the worm in the revolving stage, and revolving stage fixedly connected with can dismantle the locating piece of connection in the lead screw slider.

By adopting the technical scheme, when certain deviation occurs in the specification of the workpiece, the distance between the two groups of clamping sliding blocks can be independently adjusted, so that the adaptability to workpieces with different specifications is improved.

Optionally, the workstation is along frame slide direction sliding connection in the lathe bed, and the lathe bed is equipped with the workstation power division that drives the workstation and remove, and the workstation is along self direction sliding connection that removes two bottom clamp sliders, and the workstation is equipped with the bottom clamp slider power division that control two bottom clamp sliders are close to or keep away from mutually.

By adopting the technical scheme, the stand column does not need to move in various directions, so that the rigidity of the stand column is improved, the machining quality is improved, and the two bottom clamping sliding blocks can also limit the workpiece to move randomly along the moving direction of the workbench, so that the workpiece can stably move along with the workbench during machining.

Optionally, the frame slide includes along workstation direction of movement sliding connection in the main slide of support body, along two branch slides of workstation direction of movement sliding connection in main slide, and main slide is driven by frame slide power portion and is removed, and every branch slide sets up a fixture.

By adopting the technical scheme, after the workpiece is machined, the main sliding plate moves to enable the two sub-sliding plates to synchronously move, so that the two clamping mechanisms and the corresponding workpiece synchronously move, and meanwhile, in the workpiece machining process, the movement of the workbench can drive the single sub-sliding plate to move, so that the machined workpiece is required to be put down, and the clamping mechanisms for clamping the new workpiece to be machined cannot move along with the movement of the workbench.

Optionally, the main slide fixedly connected with pole rack, branch slide sliding connection has the brake rack that can mesh in pole rack.

By adopting the technical scheme, when the workpiece is not processed, the brake rack is meshed with the rod rack, so that the movement of the main sliding plate can effectively drive the sub sliding plate to move.

Optionally, divide slide sliding connection to have can butt in the brake rack so that the brake rack meshes in the rack of pole rack and support the piece, rack support piece fixedly connected with expose in the inserted bar of dividing the slide, inserted bar sliding connection has can move with the removal of fixture support piece pole, support piece pole near workstation one end fixedly connected with passive wedge, bottom press from both sides the initiative wedge that the slider fixedly connected with can butt in passive wedge, divide to be equipped with in the slide and compel rack support piece butt in the compression spring of brake rack.

Through adopting above-mentioned technical scheme for when the bottom clamp slider removes with work piece centre gripping, the rack supports the piece and can keep away from in the brake rack, makes this moment divide the slide to remove relative main slide, and when work piece processing was accomplished the back or need work piece rotate in order to process other sides of work piece, the bottom clamp slider kept away from in the work piece, makes compression spring with rack support the piece promote to brake rack keep away from pole rack one side, so that this moment divide the slide can't carry out the removal that corresponds any more.

Optionally, the rack support piece is kept away from compression spring one side shaping has the piece inclined plane that can support in braking rack one side of keeping away from pole rack.

By adopting the technical scheme, the rack supporting block can stably enter one side of the brake rack far away from the rod rack, so that the brake rack can be effectively forced to be stably meshed with the rod rack by the rack supporting block.

Optionally, support the piece pole including fixed screw rod, the cover of locating fixed screw rod and threaded connection in fixed screw rod of fixed connection in the rack support the piece, fixed connection supports the limit bull stick that the piece just eccentrically worn to locate fixed screw rod, fixed connection in limit bull stick and passive wedge and supply to rotate the piece pole that the cover rotated and connect.

By adopting the technical scheme, after the height specification of the workpiece is changed, the height of the passive wedge block can be adjusted, so that the active wedge block and the passive wedge block are in stable contact with the workpieces with different height specifications.

In summary, the present application includes at least one of the following beneficial effects:

1. the workpiece to be processed can be fed simultaneously when the processed workpiece is fed, and the workpiece to be processed can be fed simultaneously, so that the processing efficiency is improved;

2. In the workpiece processing process, the movement of the workbench can drive a single sub-sliding plate to move, so that the processed workpiece needs to be put down, and a clamping mechanism for clamping a new workpiece to be processed cannot move along with the movement of the workbench.

Drawings

FIG. 1 is a schematic diagram of the structure of the present application;

FIG. 2 is a schematic view of the bottom structure of the table and one clamping structure;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

Fig. 5 is a schematic view of the turret removed to show the structure at the two bi-directional screws inside the turret.

The reference numerals are 1, a lathe bed, 2, a workbench, 21, a rotating sleeve, 22, a limiting rod, 23, a block rod, 24, a workbench power part, 25, a column power part, 26, a main shaft power part, 27, a worm, 28, a plug rod, 29, a rotary motor, 3, a column, 31, a rod rack, 32, a brake rack, a rack supporting block, 34, a supporting block rod, 35, a passive wedge, 36, an active wedge, 37, a compression spring, 38, a block inclined surface, 39, a fixed screw, 4, a main shaft, 41, a screw rod slide, 42, a positioning block, 43, a bottom clamping slide, 44, a bottom clamping slide power part, 45, a main slide plate, 46, a split slide plate, 47, a frame slide plate power part, 48, a middle rod, 49, a vertical moving table power part, 5, a frame body, 51, a frame slide plate, 52, a clamping mechanism, 53, a fixed table, 54, a vertical moving table, 55, a turntable, 56, a clamping slide block, 57, a clamping motor, 58, a screw rod, 59, and a worm gear.

Detailed Description

The present application will be described in further detail with reference to the accompanying drawings.

The embodiment of the application discloses a double-acting column horizontal machining center, which comprises a machine body 1 placed on the ground, wherein the horizontal upper surface of the machine body 1 is connected with a workbench 2 in a sliding manner along the width direction of the machine body, a workpiece is placed on the horizontal upper surface of the workbench 2, the workbench 2 passes through the center of the machine body 1, the machine body 1 is provided with a workbench power part 24, and the workbench power part 24 can drive the workbench 2 to move in a mode of matching a lead screw with a motor. The two ends of the length direction of the machine body 1 are both connected with upright posts 3 in a sliding manner, the upright posts 3 move along the length direction of the machine body 1, the machine body 1 is provided with upright post power parts 25 which can drive the upright posts 3 to move in a mode of a screw rod matched motor, the near sides of the two upright posts 3 are provided with main shafts 4 for processing the vertical side surfaces of workpieces, the axial direction of the main shafts 4 is consistent with the length direction of the machine body 1, and the upright posts 3 are provided with main shaft power parts 26 which can drive the main shafts 4 to move in a mode of the screw rod matched motor.

Referring to fig. 1 and 2, a frame 5 is installed right above a machine body 1, the length direction of the frame 5 is consistent with the width direction of the machine body 1, the bottom ends of two sides of the frame 5 are located on the ground on two sides of the length direction of the machine body 1, a frame sliding plate 51 is installed on the horizontal section of the upper portion of the frame 5, the frame sliding plate 51 comprises a main sliding plate 45 which is slidably connected to the frame 5 along the length direction of the frame 5, the length direction of the main sliding plate 45 is consistent with the length direction of the frame 5, a frame sliding plate power part 47 which can drive the main sliding plate 45 to move in a mode of a screw rod matched motor is installed on the frame 5, two sub sliding plates 46 are slidably connected along the length direction of the frame 5, a clamping mechanism 52 is correspondingly installed on the bottom surfaces of the two sub sliding plates 46, and the clamping mechanism 52 can clamp the upper portion of a workpiece and position the workpiece on a workbench 2. When one workpiece is finished, the main slide 45 is moved so that one clamping mechanism 52 removes the finished workpiece from the table 2 and the other clamping mechanism 52 moves the workpiece to be processed onto the table 2 for lowering.

Referring to fig. 1 and 2, two bottom clamping sliders 43 are slidably connected to the workbench 2 along the length direction of the main sliding plate 45, the workbench 2 is provided with a bottom clamping slider power part 44 capable of driving the bottom clamping sliders 43 to move by means of a screw rod matched motor, and the two bottom clamping sliders 43 are abutted to bottoms of two opposite vertical side surfaces of a workpiece, so that the workpiece can stably move along with the workbench 2 during machining.

Referring to fig. 2 and 3, the lower surface of the main slide 45 is fixedly connected with a rod rack 31 with the length direction consistent with the length direction of the main slide 45, the two sub slide 46 are both connected with the rod rack 31 in a sliding manner, the brake rack 32 is connected with the brake rack 32 in a sliding manner in the vertical direction in the two sub slide 46, the brake rack 32 can be meshed with the rod rack 31, the upper surface of the brake rack 32 is attached with a rack support block 33, the rack support block 33 is connected with the inside of the sub slide 46 in a sliding manner in the width direction of the main slide 45, the bottom of the rack support block 33 is fixedly connected with a vertical inserted rod 28, the bottom end of the inserted rod 28 is provided with a support block rod 34, the bottom end of the support block rod 34 is exposed out of the bottom surface of the sub slide 46, the bottom end of the support block rod 34 is provided with a driven inclined wedge 35, the bottom clamp slide 43 is fixedly connected with a driving inclined wedge 36, and when the bottom clamp slide 43 moves towards a workpiece, the inclined surface of the driving wedge 36 can be abutted against the inclined surface of the driven inclined wedge 35, so that the support block 33 can move away from the brake rack 32, the brake rack 32 can be separated from the brake rack 32, the brake rack 32 can be smoothly moved away from the rack 33, and the brake rack 32 can be moved away from the slide 46.

Referring to fig. 3, a compression spring 37 is installed in the sub-slide 46 to force the rack abutment 33 to move to a side of the brake rack 32 away from the rod rack 31, a block inclined surface 38 is formed at a lower portion of the side of the rack abutment 33 facing the brake rack 32, the block inclined surface 38 can abut against a side of the brake rack 32 away from the rod rack 31, so that after the corresponding side of the workpiece is processed, the bottom clamping slider 43 is away from the workpiece, the rack abutment 33 can enter the side of the brake rack 32 away from the rod rack 31 under the action of the compression spring 37, so that the bottom horizontal plane of the rack abutment 33 abuts against the upper horizontal plane of the brake rack 32, the brake rack 32 keeps engaged with the rod rack 31, and the sub-slide 46 can move along with the movement of the main slide 45. Meanwhile, when the bottom clamp sliding block 43 is abutted against the workpiece, the block inclined surface 38 always keeps contact with the brake rack 32, so that when the bottom clamp sliding block 43 is far away from the workpiece, the rack abutment block 33 can smoothly push the brake rack 32 to move towards the rod rack 31 and mesh.

Referring to fig. 2 and 4, the block-propping rod 34 includes a fixed screw 39 sleeved in the vertical direction and slidingly connected to the insert rod 28, the circumferential outer wall of the fixed screw 39 is coaxially screwed with the rotating sleeve 21, the bottom end of the rotating sleeve 21 is coaxially connected with the block rod 23, the bottom end of the block rod 23 is fixedly connected to the passive wedge 35, one end of the block rod 23, which is provided for the rotating sleeve 21 to rotate, is fixedly connected with the limited rotating rod 22, and the limited rotating rod 22 is eccentrically inserted and slidingly connected to the fixed screw 39, i.e. the axis of the limited rotating rod 22 is different from the axis of the fixed screw 39, so that when the rotating sleeve 21 rotates, the block rod 23 does not synchronously rotate, and when the height of the passive wedge 35 needs to be adjusted after the height specification of a workpiece changes, the passive wedge 35 is not easy to rotate, so that the active wedge 36 can stably contact with the passive wedge 35.

Referring to fig. 2, each clamping mechanism 52 includes a fixed table 53 fixedly connected to the corresponding sub-sliding plate 46, the fixed table 53 is slidably connected with a vertical moving table 54 along a vertical direction, the fixed table 53 is provided with a vertical moving table power portion 49 capable of driving the vertical moving table 54 to move by means of a screw rod matched motor, the vertical moving table 54 is slidably connected with a middle rod 48 along a width direction of the main sliding plate 45, one end of the middle rod 48, far away from the vertical moving table 54, is fixedly connected to the fixed screw rod 39, so that the driven inclined wedge 35 can be driven to synchronously and vertically move at the vertical moving table 54, and the driven inclined wedge 35 can smoothly avoid the bottom clamping sliding block 43. The bottom surface of the vertical moving table 54 is rotationally connected with a turntable 55, the rotation axis of the turntable 55 is vertical, a rotary motor 29 with a rotation axis coaxially and fixedly connected with the turntable 55 is fixedly connected in the vertical moving table 54, the bottom surface of the turntable 55 is slidably connected with two groups of two clamping slide blocks 56, one group of the clamping slide blocks 56 moves along the length direction of the main slide plate 45, and the other group of the clamping slide blocks 56 moves along the width direction of the main slide plate 45.

Referring to fig. 2 and 5, two bidirectional screws 58 are installed in the turntable 55, the directions of threads on two sides of a center point of the bidirectional screws 58 are opposite, and a group of two clamping sliding blocks 56 are in one-to-one corresponding threaded connection at equal distances on two sides of the center point of the bidirectional screws 58. The turntable 55 is fixedly connected with a clamping motor 57 with an output shaft coaxially connected with a bidirectional screw rod 58, the clamping motor 57 is connected with the bidirectional screw rod 58 with low height, and the bidirectional screw rod 58 with low height is rotatably connected with the turntable 55. The center of the high bidirectional screw rod 58 is coaxially and fixedly connected with a worm 27, the center of the high bidirectional screw rod 58 is coaxially and fixedly connected with a worm wheel 59, and the worm wheel 59 is meshed with the worm 27. The two ends of the high bidirectional screw 58 are both rotationally connected with screw slide blocks 41, the screw slide blocks 41 are slidably connected to the turntable 55 along the vertical direction, the outer wall of the turntable 55 is fixedly connected with a positioning block 42, the lower surface of the screw slide blocks 41 can be abutted to the upper surface of the positioning block 42, the screw slide blocks 41 can be detachably connected to the positioning block 42 in a bolt-nut mode, after the length or width specification of a workpiece is changed, the interval between each group of clamping slide blocks 56 can be independently adjusted in a suitable mode, and the two groups of clamping slide blocks 56 can be synchronously abutted to the vertical side surface of the workpiece.

The principle of implementation of the double-acting column horizontal machining center of the embodiment of the application is that after one workpiece is machined, the main sliding plate 45 moves, so that the corresponding clamping mechanism 52 moves the machined workpiece away from the workbench 2, the machined workpiece is removed and a new workpiece to be machined is clamped, and meanwhile, the clamping mechanism 52 which clamps the workpiece to be machined before moves to the position right above the workbench 2, so that the workpiece is machined.

The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.

Claims

1. The double-acting column horizontal machining center comprises a machine body (1), a workbench (2) arranged on the machine body (1) and used for placing a workpiece, a column (3) connected with the machine body (1) in a sliding manner so as to be close to or far away from the workpiece, a column power part (25) arranged on the machine body (1) and used for enabling the column (3) to move, a main shaft (4) connected with the column (3) in a sliding manner and used for machining the workpiece, and a main shaft power part (26) arranged on the column (3) and used for enabling the main shaft (4) to move, and is characterized in that a frame body (5) is arranged above the machine body (1), a frame sliding plate (51) is connected with the frame body (5) in a sliding manner, the frame sliding plate (5) is provided with a frame sliding plate power part (47) used for driving the frame sliding plate (51) to move, the frame sliding plate (51) is provided with two clamping mechanisms (52) capable of clamping the workpiece, and the two clamping mechanisms (52) are arranged along the moving direction of the frame sliding plate (51);

The workbench (2) is slidably connected with the lathe bed (1) along the moving direction of the frame sliding plate (51), the lathe bed (1) is provided with a workbench power part (24) for driving the workbench (2) to move, the workbench (2) is slidably connected with two bottom clamping sliding blocks (43) along the moving direction of the workbench (2), the workbench (2) is provided with a bottom clamping sliding block power part (44) for controlling the two bottom clamping sliding blocks (43) to approach or separate from each other, the frame sliding plate (51) comprises a main sliding plate (45) slidably connected with the frame body (5) along the moving direction of the workbench (2), two sub sliding plates (46) slidably connected with the main sliding plate (45) along the moving direction of the workbench (2), the main sliding plate (45) is driven by the frame sliding plate power part (47), each sub sliding plate (46) is provided with a clamping mechanism (52), the main sliding plate (45) is fixedly connected with a rod rack (31), the sub sliding plates (46) are slidably connected with a brake rack (32) capable of being meshed with the rod rack (31), the sub sliding plates (46) are slidably connected with the brake rack (32) so that the brake rack (32) can be meshed with the rod rack (33) in a fixed manner, the movable clamping device comprises a clamping mechanism (52), a push rod (34) capable of moving along with the movement of the clamping mechanism (28), a passive inclined wedge (35) is fixedly connected to one end of the push rod (34) close to the workbench (2), a driving inclined wedge (36) capable of being abutted to the passive inclined wedge (35) is fixedly connected to a bottom clamping sliding block (43), a compression spring (37) for forcing a rack push block (33) to be abutted to a brake rack (32) is arranged in a sliding plate (46), the push rod (34) comprises a fixed screw (39) sleeved in the vertical direction and connected with the push rod (28) in a sliding mode, a rotating sleeve (21) is coaxially connected with the circumferential outer wall of the fixed screw (39) in a threaded mode, a block rod (23) is coaxially connected to the bottom end of the rotating sleeve (21), the bottom end of the block rod (23) is fixedly connected to the passive inclined wedge (35), one end of the rotating sleeve (21) is fixedly connected with a limited rotating rod (22), and the limited rotating rod (22) is eccentrically inserted and connected to the fixed screw (39) in a sliding mode.

2. The double-acting column horizontal machining center according to claim 1, wherein the clamping mechanism (52) comprises a fixed table (53) fixedly connected with the frame sliding plate (51), a vertical moving table (54) slidingly connected with the fixed table (53) along the direction towards the workbench (2), a vertical moving table power part (49) arranged on the fixed table (53) and driving the vertical moving table (54) to move, a rotary motor (29) fixedly connected with the vertical moving table (54), a rotary table (55) rotationally connected with the vertical moving table (54) and driven by the rotary motor (29), two groups of clamping sliding blocks (56) slidingly connected with the rotary table (55) and used for clamping a workpiece, and a clamping motor (57) arranged on the rotary table (55) and used for driving the clamping sliding blocks (56) to move, wherein the two groups of clamping sliding blocks (56) clamp the peripheral side surfaces of the workpiece.

3. The double-acting column horizontal machining center according to claim 2, wherein two groups of clamping sliding blocks (56) are in threaded connection with a bidirectional screw rod (58), the bidirectional screw rod (58) can drive the two clamping sliding blocks (56) in the same group to be close to or far away from each other, worm wheels (59) and worms (27) are fixedly connected to the two bidirectional screw rods (58) in a one-to-one correspondence mode, the worm wheels (59) are meshed with the worms (27), and an output shaft of the clamping motor (57) is coaxially and detachably connected to the bidirectional screw rod (58) provided with the worms (27).

4. A double-acting column horizontal machining center according to claim 3, wherein a screw slider (41) is rotatably connected to a bidirectional screw (58) far away from the clamping motor (57), the screw slider (41) is slidably connected to a turntable (55) so that a worm wheel (59) can be close to or far away from the worm (27), and the turntable (55) is fixedly connected with a positioning block (42) detachably connected to the screw slider (41).

5. A double-acting column horizontal machining center according to claim 1, wherein a block inclined surface (38) capable of being abutted against one side of the brake rack (32) away from the rod rack (31) is formed on one side of the rack abutting block (33) away from the compression spring (37).