CN209793281U - Small parallel type engraving and milling machine - Google Patents

Abstract

The utility model relates to a small parallel fine carving machine, which comprises a base, a two-dimensional moving mechanism, and a 2R1T parallel mechanism. A knife handle is installed on the 2R1T parallel mechanism. Longitudinal movement, the two-dimensional moving mechanism is equipped with a workpiece table, and the 2R1T parallel mechanism includes a rotary table, a dynamic platform, a static platform, two UPS type active motion branch chains, a UPR type active motion branch chain, and a UP type passive motion branch chain, The rotary table is installed on the moving platform, the tool handle is installed in the middle of the moving platform, the tool handle, the rotary table, and the moving platform are concentric, the moving platform is connected with the static platform through each branch chain, and the static platform is fixed on the base, parallel Under the joint drive of three active branch chains, the mechanism can realize two rotations and one translation motion of the moving platform relative to the static platform, and the passive branch chain can enhance the overall structural rigidity of the mechanism. Machining of complex surfaces.

Description

Small Parallel Engraving Machine

technical field

The utility model relates to a small parallel fine carving machine.

Background technique

Jingdiao machine belongs to a kind of CNC machine tool, which can be used for drilling, cutting and surface engraving of metal or non-metal materials. At present, most of the engraving machines on the market are tandem and relatively large in size and high in cost. Compared with the series mechanism, the parallel mechanism has higher overall rigidity, better structural dexterity, and good positioning accuracy. In addition, the structure of the parallel mechanism is simple and easy to manufacture, the assembly is compact, the volume is small, and the manufacturing cost is relatively low, which is suitable for the design of new engraving machines.

Utility model content

In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a small parallel fine carving machine.

In order to solve the above technical problems, the technical solution of the present utility model is: a small parallel fine carving machine, which is characterized in that it includes a base, a two-dimensional moving mechanism arranged on the base in turn, a 2R1T parallel mechanism, and the 2R1T parallel mechanism A tool handle is installed on the tool handle, and a tool holder is installed on the tool handle. The two-dimensional moving mechanism can move horizontally and vertically, and the two-dimensional moving mechanism is equipped with a workpiece table;

The 2R1T parallel mechanism includes a rotary table, a moving platform, a static platform, the first branch chain, the second branch chain, the third branch chain and the fourth branch chain. The rotary table is installed on the moving platform, and the handle is installed on the moving platform In the middle, the tool handle, the rotary table, and the moving platform are concentric. The moving platform is connected to the static platform through the first branch chain, the second branch chain, the third branch chain and the fourth branch chain. The static platform is fixed on the base superior;

The first branch chain is a UPS type active movement branch chain, the second branch chain is a UPS type active movement branch chain, the third branch chain is a UPR type active movement branch chain, and the fourth branch chain is a UP type passive movement branch chain chain, the first branch chain and the second branch chain are arranged on the left and right sides of the static platform, the third branch chain is arranged on the upper side of the static platform, there is an installation through hole in the static platform, and the fourth branch chain is installed in the installation through hole, From the static platform to the moving platform, the Hooke hinge connected to the static platform, the moving pair connected to the Hooke hinge, the ball pair connected to the moving platform are successively distributed on the first branch chain and the second branch chain, and the third branch chain There are Hooke hinges connected to the static platform, moving joints connected to the Hooke hinges, and revolving joints connected to the moving platform.

Further, the first branch chain includes the first ball pair installed on the first branch chain body, the first lead screw, the first slide table, the first Hooke hinge, the first stepping motor, the first ball pair Installed at the end of one side of the first branch chain body, the first slide table is installed on the other side of the first branch chain body, the first slide table is set along the length direction of the first branch chain body, and the first lead screw position is the first slide Above the table, one end of the first lead screw is installed on the first branch chain body through the bearing seat, and the other end is connected to the first stepping motor through the coupling for transmission. The sliding block is fitted with a sliding block, the base of the first Hooke hinge is equipped with a first nut threaded with the first lead screw, the first nut is sleeved on the first lead screw, and the first ball pair is connected with the moving platform. The first Hooke hinge is connected with the static platform.

Further, the second branch chain includes a second ball pair installed on the second branch chain body, a second lead screw, a second slide table, a second Hooke hinge, a second stepping motor, and a second ball pair Installed at the end of one side of the second branched chain body, the second sliding table is installed on the other side of the second branched chain body, the second sliding table is set along the length direction of the second branched chain body, and the second lead screw is located on the second slide Above the table, one end of the second lead screw is installed on the second branch chain body through the bearing seat, and the other end is connected to the second stepping motor through the coupling for transmission. The sliding block is fitted with a sliding block, the base of the second Hooke hinge is equipped with a second nut threaded with the second lead screw, the second nut is sleeved on the second lead screw, and the second ball pair is connected with the moving platform. The second Hooke hinge is connected to the static platform.

Further, the third branch chain includes a rotating pair installed on the third branch chain body, a third lead screw, a third slide table, a third Hooke hinge, and a third stepping motor, and the rotating pair is installed on the third At the end of one side of the branch chain body, the third sliding table is installed on the other side of the third branch chain body, the third sliding table is arranged along the length direction of the third branch chain body, the third lead screw is located above the third sliding table, and the third sliding table is installed on the other side of the third branch chain body. One end of the three lead screws is installed on the third branch chain body through the bearing seat, and the other end is connected to the third stepping motor through the coupling for transmission. block, the base body of the third Hooke hinge is equipped with a third nut threaded with the third lead screw, the third nut is sleeved on the third screw rod, the rotating pair is connected with the moving platform, the third Hooke hinge is connected with the The static platform is connected.

Further, the fourth branch chain includes a fourth Hooke hinge, a fourth branch chain body, one end of the fourth branch chain is connected to the moving platform, the other end bearing of the fourth branch chain body is provided with a guide rail, and the slide table of the guide rail moves along the The length direction of the four branch chains is set, the base body of the fourth Hooke hinge is equipped with a slide block that slides and cooperates with the guide rail, the fourth Hooke hinge is connected with the static platform, and the axis of the fourth branch chain is connected with the return on the moving platform. The axis of the turntable coincides.

Further, the two-dimensional moving mechanism includes a lateral movement pair, a moving table, a longitudinal movement pair, and a mounting seat, and the lateral movement pair includes a horizontally placed traversing screw, and both ends of the traversing screw are installed on the base through bearing seats. Above, there are transverse guide rods arranged symmetrically on both sides of the front and rear sides of the traverse screw rod. Both ends of the traverse guide rod are connected to the base. The rod is covered with a traversing nut that fits with its thread, and the horizontal guide rod is covered with a guide sleeve A that slides with it. The guide sleeve and the traversing nut are connected to the lower side of the mobile table. The longitudinal movement pair includes a longitudinal The two ends of the vertical movement screw are installed on the upper side of the mobile platform through the bearing seat, and the left and right sides of the longitudinal movement screw are symmetrically provided with longitudinal guide rails, which are installed on the mobile platform, and one end of the longitudinal movement screw is passed through The coupling is connected to the longitudinal movement motor installed on the mobile platform for transmission. The longitudinal movement screw rod is covered with a longitudinal movement nut that fits with its thread, and the longitudinal guide rail is provided with a slider that slides and cooperates with it. The slider and the longitudinal movement nut All are connected with the lower side of the mounting seat, and the workpiece table is installed on the mounting seat.

Compared with the prior art, the utility model has the following beneficial effects: simple structure, small size, high degree of modularization, low manufacturing cost, the main working mechanism is a parallel mechanism with three degrees of freedom, and can realize 2R1T ( Two rotations and one translation) motion output, which can process complex curved surfaces.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Description of drawings

Figure 1 is a schematic diagram of the structure of the engraving machine;

Figure 2 is a schematic diagram of the structure of the 2R1T parallel mechanism;

Fig. 3 is the structural representation of the first branch;

Fig. 4 is the structural representation of the second branch;

Fig. 5 is the structural representation of the third branch;

Fig. 6 is the structural representation of the 4th branch;

Fig. 7 is a schematic structural diagram of a two-dimensional moving mechanism.

In the picture:

Ⅰ-two-dimensional moving mechanism; Ⅱ-workpiece table; Ⅲ-knife handle; Ⅳ-2R1T parallel mechanism;

1-base; 2-rotary disc; 3-moving platform; 4-second branch; 5-third branch; 6-static platform; 7-fourth branch; 8-first branch;

101-the first branch chain body; 102-the first moving pair; 103-the first stepping motor; 104-the first Hooke hinge; 105-the first slide table; 106-the first screw; 107-the first ball vice;

201-the second branch chain body; 202-the second ball pair; 203-the second screw; 204-the second slide table; 205-the second Hooke hinge; 206-the second stepping motor; 207-the second movement vice;

301-the third Hooke hinge; 302-the third sliding table; 303-the third screw; 304-the third branch chain; 305-rotating pair; 306-the third moving pair; 307-the third stepping motor;

401-the fourth Hooke hinge; 402-the fourth moving pair slider; 403-the fourth moving pair guide rail; 404-the fourth branch chain body;

501-transverse motor; 502-transverse guide rod; 503-transverse screw; 504-moving table; 505-longitudinal wire; 506-installation seat;

Detailed ways

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific examples are given together with the accompanying drawings and described in detail as follows.

As shown in Figure 1-7, a small parallel fine carving machine is characterized in that it includes a base, a two-dimensional moving mechanism arranged on the base in sequence, a 2R1T parallel mechanism, and a knife handle is installed on the 2R1T parallel mechanism. The tool holder is installed on the tool handle, and the two-dimensional moving mechanism can move horizontally and vertically. The workpiece table is installed on the two-dimensional moving mechanism, and the workpiece table is used to install the workpiece to be processed. Longitudinal working stroke;

The 2R1T parallel mechanism includes a rotary table, a moving platform, a static platform, the first branch chain, the second branch chain, the third branch chain and the fourth branch chain. The rotary table is installed on the moving platform, and the handle is installed on the moving platform In the middle, the tool handle, the rotary table, and the moving platform are concentric. The moving platform is connected to the static platform through the first branch chain, the second branch chain, the third branch chain and the fourth branch chain. The static platform is fixed on the base superior;

The first branch chain is a UPS type active movement branch chain, the second branch chain is a UPS type active movement branch chain, the third branch chain is a UPR type active movement branch chain, and the fourth branch chain is a UP type passive movement branch chain chain, the first branch chain and the second branch chain are arranged on the left and right sides of the static platform, the third branch chain is arranged on the upper side of the static platform, there is an installation through hole in the static platform, and the fourth branch chain is installed in the installation through hole, From the static platform to the moving platform, the Hooke hinge connected to the static platform, the moving pair connected to the Hooke hinge, the ball pair connected to the moving platform are successively distributed on the first branch chain and the second branch chain, and the third branch chain The Hooke hinge connected to the static platform, the moving pair connected to the Hooke hinge, and the revolving pair connected to the moving platform are successively distributed on the top. Driven by the three active branch chains, the 2R1T parallel mechanism realizes the relative static movement of the moving platform. The two rotations and one translation movement of the platform, and the passive branch chain can enhance the overall structural rigidity of the mechanism.

In this embodiment, the first branch chain includes a first ball pair installed on the first branch chain body, a first lead screw, a first slide table, a first Hooke hinge, a first stepping motor, a first A ball pair is installed at the end of one side of the first branch chain body, the first slide table is installed on the other side of the first branch chain body, the first slide table is arranged along the length direction of the first branch chain body, and the first lead screw is located at the Above the first sliding table, one end of the first lead screw is installed on the first branch chain body through the bearing seat, and the other end is connected to the first stepping motor through a coupling for transmission. A sliding block slidingly matched with a slide table, the first nut threaded with the first lead screw is installed on the base of the first Hookee hinge, the first nut is sleeved on the first lead screw, the first ball pair and the moving platform connected, the first Hooke hinge is connected with the static platform.

In this embodiment, the second branch chain includes a second ball pair installed on the second branch chain body, a second lead screw, a second slide table, a second Hooke hinge, a second stepping motor, and a second The second ball pair is installed at the end of one side of the second branch chain body, the second slide table is installed on the other side of the second branch chain body, the second slide table is arranged along the length direction of the second branch chain body, and the second lead screw position Above the second sliding table, one end of the second lead screw is installed on the second branch chain body through the bearing seat, and the other end is connected to the second stepping motor through a coupling for transmission. The sliding block of the second sliding table is slidably matched. The second nut is installed on the base of the second Hooke hinge threadedly matched with the second screw. The second nut is sleeved on the second screw. The second ball pair and the moving platform connected with each other, and the second Hooke hinge is connected with the static platform.

In this embodiment, the third branch chain includes a rotating pair installed on the third branch chain body, a third lead screw, a third slide table, a third Hooke hinge, and a third stepping motor, and the rotating pair is installed At the end of one side of the third branch chain body, the third sliding table is installed on the other side of the third branch chain body, the third sliding table is arranged along the length direction of the third branch chain body, and the third lead screw is located on the third sliding table Above, one end of the third lead screw is installed on the third branch chain body through the bearing seat, and the other end is connected to the third stepping motor through the coupling for transmission. The mated slider, the base body of the third Hooke hinge is equipped with a third nut threaded with the third lead screw, the third nut is sleeved on the third lead screw, the rotating pair is connected with the moving platform, the third tiger The gram hinge is connected with the static platform.

In this embodiment, the fourth branch chain includes a fourth Hooke hinge, a fourth branch chain body, one end of the fourth branch chain is connected to the moving platform, and the other end bearing of the fourth branch chain body is provided with a guide rail, and the guide rail slides The platform is set along the length direction of the fourth branch chain body, the base body of the fourth Hooke hinge is equipped with a slide block that slides and cooperates with the guide rail, the fourth Hooke hinge is connected with the static platform, and the axis of the fourth branch chain body is connected with the moving platform. The axis of the turntable on the top coincides.

In this embodiment, the two-dimensional moving mechanism includes a lateral movement pair, a moving table, a longitudinal movement pair, and a mounting seat, and the lateral movement pair includes a horizontally placed traversing screw, and the two ends of the traversing screw pass through the bearing seat Installed on the base, horizontal guide rods are symmetrically arranged on the front and rear sides of the traversing screw rod. The traversing screw rod is covered with a traversing nut matching its thread, and the traversing guide rod is provided with a guide sleeve A slidingly fitted with it. Both the guide sleeve and the traversing nut are connected with the lower side of the mobile table, and the longitudinal movement The pair includes vertically placed vertically moving screw rods, both ends of the vertically moving screw rods are installed on the upper side of the mobile platform through bearing seats, and longitudinal guide rails are arranged symmetrically on the left and right sides of the vertically moving screw rods, and the longitudinal guide rails are installed on the mobile platform. One end of the rod is connected to the longitudinal movement motor installed on the mobile platform through a coupling. The longitudinal movement screw rod is covered with a longitudinal movement nut that fits with its thread, and the longitudinal guide rail is provided with a slider that slides with it. The longitudinal movement nuts are all connected with the lower side of the mounting seat, and the workpiece table is installed on the mounting seat.

In this embodiment, in the first branch chain, the first ball pair includes the rotation axis L ₁₄ , the rotation axis L ₁₅ , and the rotation axis L ₁₆ , and the rotation axis L ₁₄ , the rotation axis L ₁₅ , and the rotation axis L ₁₆ intersect at one point and Not coplanar; the first Hooke hinge includes the rotation axis L ₁₁ and the rotation axis L ₁₂ , and the intersection of the two axes is recorded as the center of the kinematic pair of the first Hooke hinge; the moving axis of the first moving pair is L ₁₃ , and the rotation axis L ₁₁ is vertical; the first stepping motor provides driving force for the active movement of the first moving pair. Among them, the rotation axis L ₁₄ is perpendicular to the movable secondary axis L ₁₃ and parallel to the rotational axis L ₁₁ ; the rotational axis L ₁₅ is perpendicular to the movable secondary axis L ₁₃ and perpendicular to the rotational axis L ₁₁ ; the rotational axis L ₁₆ is perpendicular to the movable secondary axis L ₁₃ parallel.

In this embodiment, in the second branch chain, the second ball pair includes the rotation axis L ₂₄ , the rotation axis L ₂₅ , and the rotation axis L ₂₆ , and the rotation axis L ₂₄ , the rotation axis L ₂₅ , and the rotation axis L ₂₆ intersect at one point and are not coplanar; the second Hooke hinge includes the rotation axis L ₂₁ and the rotation axis L ₂₂ , and the intersection point of the two axes is marked as the motion pair center of the second Hooke hinge; the movement axis of the second moving pair is L ₂₃ , and the rotation axis L ₂₁ is vertical; the second stepping motor provides driving force for the active movement of the second moving pair. Among them, the rotation axis L ₂₄ is perpendicular to the movable secondary axis L ₂₃ and parallel to the rotational axis L ₂₁ ; the rotational axis L ₂₅ is perpendicular to the movable secondary axis L ₂₃ and perpendicular to the rotational axis L ₂₁ ; the rotational axis L ₂₆ is perpendicular to the movable secondary axis L ₂₃ parallel.

In this embodiment, in the third branch chain, the rotation axis of the rotating pair is L ₃₄ ; the third Hooke hinge includes the rotation axis L ₃₁ and the rotation axis L ₃₂ , and the intersection of the two axes is marked as the kinematic pair of the third Hooke hinge Center; the moving axis of the third moving pair is L ₃₃ ; the third stepping motor provides driving force for the active movement of the third moving pair. Wherein, the movement axis of the third moving pair is _L33 , which is perpendicular to the rotation axis _L31 ; the rotation axis of the rotation pair is _L34 , which is perpendicular to the movement axis _L33 and parallel to the rotation axis _L31 .

In this embodiment, in the fourth branch chain, the fourth Hookee hinge includes the rotation axis L ₄₁ and the rotation axis L ₄₂ , and the intersection point of the two axes is marked as the motion pair center of the fourth Hooke hinge; the movement axis of the fourth motion pair is L ₄₃ , which is perpendicular to the rotation axis L ₄₁ . When the mechanism is working, the fourth mobile pair performs passive motion.

In this embodiment, the first moving pair, the second moving pair, and the third moving pair are all slider guide rail modules, and the movement mode can be a screw slide driven by a stepping motor, or a linear motor, hydraulic , pneumatic push rod, etc. driven linear motion mechanism; the first Hooke hinge, the second Hooke hinge, the third Hooke hinge, the fourth Hooke hinge and the revolving pair of the revolving pair can use one or more sets of pins It is hinged with the bearing; the first ball pair and the second ball pair can use joint bearings or three-axis compound rotary joints, but are not limited thereto.

In this embodiment, the plane shape formed by the center of the first Hooke hinge, the center of the second Hooke hinge, and the center of the third Hooke hinge is not limited; the center of the first spherical pair, the center of the second spherical pair The planar shape formed by the center and the center of the rotating pair is not limited. Preferably, the center of the first Hooke hinge, the center of the second Hooke hinge, and the center of the third Hooke hinge are distributed on the static platform in an isosceles right triangle, wherein the center of the third Hooke hinge is located in the isosceles right triangle The center of the first spherical pair, the center of the second spherical pair, and the center of the rotating pair are correspondingly distributed on the moving platform in an isosceles right triangle, wherein the center of the rotating pair is located at the right angle vertex of the isosceles right triangle.

The utility model is not limited to the above-mentioned best implementation mode, and anyone can obtain other various forms of small-scale parallel-connected engraving machines under the enlightenment of the utility model. All equivalent changes and modifications made according to the patent scope of the utility model should belong to the scope of the utility model.

Claims (6)

1. A small parallel engraving machine, characterized in that: it comprises a base, a two-dimensional moving mechanism arranged on the base in turn, a 2R1T parallel mechanism, a knife handle is installed on the 2R1T parallel mechanism, and a knife handle is installed on the knife handle Frame, the two-dimensional moving mechanism can move horizontally and vertically, and the workpiece table is installed on the two-dimensional moving mechanism; The 2R1T parallel mechanism includes a rotary table, a moving platform, a static platform, the first branch chain, the second branch chain, the third branch chain and the fourth branch chain. The rotary table is installed on the moving platform, and the handle is installed on the moving platform In the middle, the tool handle, the rotary table, and the moving platform are concentric. The moving platform is connected to the static platform through the first branch chain, the second branch chain, the third branch chain and the fourth branch chain. The static platform is fixed on the base superior; The first branch chain is a UPS type active movement branch chain, the second branch chain is a UPS type active movement branch chain, the third branch chain is a UPR type active movement branch chain, and the fourth branch chain is a UP type passive movement branch chain chain, the first branch chain and the second branch chain are arranged on the left and right sides of the static platform, the third branch chain is arranged on the upper side of the static platform, there is an installation through hole in the static platform, and the fourth branch chain is installed in the installation through hole, From the static platform to the moving platform, the Hooke hinge connected to the static platform, the moving pair connected to the Hooke hinge, the ball pair connected to the moving platform are successively distributed on the first branch chain and the second branch chain, and the third branch chain There are Hooke hinges connected to the static platform, moving joints connected to the Hooke hinges, and revolving joints connected to the moving platform. 2. A small parallel fine carving machine according to claim 1, characterized in that: said first branch chain includes a first ball pair, a first lead screw, a first The sliding table, the first Hooke hinge, the first stepping motor, the first ball pair are installed at the end of one side of the first chain body, the first sliding table is installed at the other side of the first chain body, and the first sliding table is installed on the other side of the first chain body. The table is set along the length direction of the first branch chain body, the first screw is located above the first slide table, one end of the first lead screw is installed on the first branch chain body through the bearing seat, and the other end is connected to the first stepping body through the coupling. The motor is connected to the transmission, the base body of the first Hooke hinge is equipped with a slide block that slides and cooperates with the first slide table, the base body of the first Hooke hinge is equipped with a first nut threaded with the first lead screw, and the first nut Sleeved on the first screw rod, the first ball pair is connected with the moving platform, and the first Hooke hinge is connected with the static platform. 3. A small parallel fine engraving machine according to claim 1, characterized in that: the second branch chain includes a second ball pair, a second lead screw, a second The slide table, the second Hooke hinge, the second stepping motor, the second ball pair are installed at the end of the second branch chain body, the second slide table is installed at the other side of the second branch chain body, and the second slide The platform is set along the length direction of the second branch chain body, the second screw is located above the second slide table, one end of the second screw is installed on the second branch chain body through the bearing seat, and the other end is connected with the second stepper through the coupling. The motor is connected to the drive, and the base body of the second Hooke hinge is equipped with a slider that slides and fits with the second slide table, and the base body of the second Hooke hinge is equipped with a second nut threaded with the second lead screw. It is sleeved on the second screw rod, the second ball pair is connected with the moving platform, and the second Hooke hinge is connected with the static platform. 4. A small parallel fine engraving machine according to claim 1, characterized in that: the third branch chain includes a revolving pair installed on the third branch chain body, a third lead screw, and a third slide table , the third Hooke hinge, the third stepping motor, the rotating pair is installed at the end of one side of the third branch chain body, the third slide table is installed on the other side of the third branch chain body, and the third slide table is installed along the third branch chain body. The branch chain body is set in the length direction, the third lead screw is located above the third sliding table, one end of the third lead screw is installed on the third branch chain body through the bearing seat, and the other end is connected to the third stepping motor through a coupling for transmission. The base body of the third Hooke hinge is equipped with a slide block that is slidingly matched with the third slide table, and the base body of the third Hooke hinge is equipped with a third nut threaded with the third lead screw, and the third nut is sleeved on the third screw thread. On the three screw rods, the rotating pair is connected with the moving platform, and the third Hooke hinge is connected with the static platform. 5. A small parallel fine carving machine according to claim 1, characterized in that: the fourth branch chain includes the fourth Hooke hinge, the fourth branch chain body, and one end of the fourth branch chain is connected to the moving platform. The bearing at the other end of the fourth branch chain body is provided with a guide rail, and the slide table of the guide rail is arranged along the length direction of the fourth branch chain body. Connected with the static platform, the axis of the fourth branch chain coincides with the axis of the rotary disk on the moving platform. 6. A small parallel fine engraving machine according to claim 1, characterized in that: the two-dimensional moving mechanism includes a lateral moving pair, a moving table, a longitudinal moving pair, and a mounting seat, and the lateral moving pair includes a horizontal The two ends of the traversing screw are installed on the base through the bearing seat. The front and rear sides of the traversing screw are symmetrically equipped with transverse guide rods. The two ends of the transverse guide rod are connected with the base. Through the coupling, it is connected with the traverse motor installed on the base for transmission. The traverse screw rod is covered with a traverse nut that fits with its thread, and the traverse guide rod is covered with a guide sleeve A that slides with it. The guide sleeve, The traversing nuts are all connected to the lower side of the mobile platform, and the longitudinal movement pair includes a longitudinally moving screw rod. Both ends of the vertically moving screw rod are installed on the upper side of the moving table through bearing seats. A longitudinal guide rail is provided, and the longitudinal guide rail is installed on the mobile platform. One end of the longitudinal movement screw rod is connected to the longitudinal movement motor installed on the mobile platform through a coupling. , the longitudinal guide rail is provided with a slider slidingly matched with it, the slider and the longitudinal movement nut are all connected with the lower side of the mounting base, and the workpiece table is installed on the mounting base.