Double-head machining center and control method thereof

Abstract

The invention relates to a double-head machining center and a control method thereof.The double-head machining center comprises a machining center body, the machining center body comprises a lathe bed and a workbench, the workbench is installed on the lathe bed, a clamp is arranged on the workbench, the portions, on the two opposite sides of the clamp, of the lathe bed are each provided with a machine head in a horizontal sliding mode, and the two machine heads slide in parallel; drill bits are rotationally installed on the machine heads and are coaxial. After the workpiece is clamped and fixed to the workbench through the clamp, the two machine heads move oppositely to conduct opposite drilling on the two sides of the workpiece synchronously, after the hole depth of the two sides reaches the specified depth, one machine head retreats, the other machine head continues to advance to drill through the hole, compared with one-way drilling and two-way drilling, the length of a drill bit needed by two-way drilling is shorter, and the drilling efficiency is improved. The drill bit shakes less during drilling, the precision of drilled holes is higher, the drilling speed is higher, and the drill bit is not prone to breakage during high-speed rotating drilling due to the fact that the drill bit shakes less.

Description

Technical Field

[0001] The present application relates to the field of high-precision machine tools, and in particular to a double-head machining center and a control method thereof. Background Art

[0002] In the process of processing semiconductor materials, especially when drilling holes with smaller diameters, since the drill bit used for drilling is relatively thin, when drilling a hole with a greater depth, the drilling quality is prone to the phenomenon of the hole diameter being too large due to the excessive vibration of the long drill bit. In addition, since the hardness of semiconductor materials is relatively high and the rotation speed of the drill bit is relatively high, the excessive vibration of the drill bit can easily cause the drill bit to break and be damaged. Summary of the invention

[0003] In order to solve the problem that a traditional machining center is prone to low drilling quality due to excessive vibration of the drill bit when drilling deep holes in semiconductor materials, the present application provides a double-head machining center and a control method thereof.

[0004] In the first aspect, the double-head machining center provided by the present application adopts the following technical solution: A double-head machining center includes a machining center body, the machining center body includes a bed and a workbench, the workbench is installed on the bed, a clamp is arranged on the workbench, a machine head is horizontally slidably installed on the bed on opposite sides of the clamp, the two machine heads slide in parallel, a drill bit is rotatably installed on the machine head, and the two drill bits are coaxial.

[0005] After the workpiece is clamped on the workbench by a fixture, the two machine heads move relative to each other to drill holes on both sides of the workpiece simultaneously. When the hole depths on both sides reach the specified depth, one of the machine heads retreats and the other continues to move forward to drill the holes. Compared with unidirectional drilling, bidirectional drilling requires a shorter drill bit, and the drill bit shakes less during drilling. The drilled holes are more accurate and the drilling speed is faster. In addition, due to the smaller drill bit jitter, it is not easy to break during high-speed drilling.

[0006] Optionally, a first mounting seat, a second mounting seat and a dividing plate are provided on the bed, the first mounting seat is horizontally slidably mounted on the bed, the second mounting seat is vertically lifted and lowered on the first mounting seat, the dividing plate is mounted on the second mounting seat, and the workbench is mounted on the dividing plate, the axis of the dividing plate is parallel to the sliding direction of the first mounting seat, and the sliding direction of the first mounting seat is perpendicular to the sliding direction of the machine head.

[0007] Optionally, the workbench is penetrated by a mounting hole, and the fixture includes an annular clamp and a plurality of clamping members, the clamp is mounted on the workbench, the clamp is connected to the mounting hole, the clamp is mounted on the clamp and distributed around the inner hole of the clamp, the workpiece is located in the enclosed area of ​​the clamp, the clamp clamps the workpiece and fixes it on the clamp, and the workpiece is located in the mounting hole.

[0008] Optionally, a positioning piece is installed on one side of the clamping piece for mounting the clamp.

[0009] Optionally, the mounting hole is circular, the clamping plate is annular, an annular boss is coaxially arranged on one surface of the clamping plate, and the boss is slidably mounted in the mounting hole.

[0010] Optionally, two tool setters are installed on the side wall of the workbench, the two tool setters are coaxial, and the two tool setters are respectively used to set the two drill bits, and the setting direction of the tool setters is parallel to the normal of the worktable surface of the workbench.

[0011] Optionally, the clamping member includes a mounting block and a clamping block, the mounting block is mounted on the clamping plate, a fixing bolt is provided on the mounting block, one end of the clamping block is mounted on the mounting block through the fixing bolt, and the other end of the clamping block is pressed against the workpiece.

[0012] Optionally, the clamping member includes a mounting block and a clamping block, the mounting block is mounted on the clamping plate, a slider is slidably mounted on the mounting block, the clamping block is slidably mounted on the slider in a direction approaching or away from the clamping area of ​​the clamping plate, the slider is used to push the clamping block against the workpiece, a first driving member is provided in the mounting block for driving the clamping block to slide, a second driving member is provided in the mounting block for driving the slider to slide, the second driving member is transmission-connected to the first driving member, a third driving member 9 is provided on the clamping plate, and the first driving member is transmission-connected to the third driving member 9.

[0013] Optionally, the third driving member 9 includes a third driving screw threadedly mounted on the clamping plate, one end of the third driving screw is transmission-connected to the first driving member, two limit nuts are threadedly mounted on the third driving screw, a limit spring is sleeved on the third driving screw between the two limit nuts, and both ends of the limit spring are respectively pressed against the two limit nuts.

[0014] In a second aspect, the present application provides a double-head drilling control method, comprising the following steps: S1, clamping the workpiece; S2, tool setting; S3. Confirm the verticality of the workbench; S4. Confirm the verticality of the workpiece; S5, bidirectional punching; The workpiece is clamped by the above-mentioned workbench and fixture in S1, the tool is set by the above-mentioned tool setting instrument in S2, and the verticality of the workbench in S3 is confirmed by comparing the actual relative distance between the two drill bits during tool setting with the relative distance between the two drill bits during standard tool setting. When drilling in S4, when the two drill bits drill synchronously to the specified relative distance, one of the drill bits retracts, and the other drill bit continues to drill through and then retracts.

[0015] In summary, the present invention vertically fixes the semiconductor board on the workbench, and synchronously drills holes with two coaxial drill bits on both sides of the workbench. When the hole depth is the same, the drilling depth is 1 / 2 of that of the single-sided drilling, so that deeper and higher-quality holes can be drilled. Moreover, since the single-sided hole depth is shallower and the drill bit length is shorter, the vibration is not easy to be too large during high-speed rotation drilling, the drill bit is not easy to break, and the service life of the drill bit is longer. At the same time, due to the two symmetrically installed tool setting instruments, the verticality of the workbench can be calculated by comparing the difference between the actual distance between the two coaxial drill bits during tool setting and the standard distance, making it easier to determine and correct the verticality of the workbench. When installing the semiconductor board, after placing the semiconductor board on the workbench, the semiconductor board can be easily counterweighted by rotating the positioning column. At the same time, the positioning column can drive the clamping block to clamp the semiconductor board, which is convenient for clamping and fixing, and is not easy to accidentally touch the semiconductor board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of this application.

[0017] Figure 2 It is a three-dimensional structural diagram of the bed and its upper structure.

[0018] Figure 3 The figure is a three-dimensional structure diagram of the indexing plate and the workbench of the present application, in which the protective cover on the workbench is removed.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the workbench of the present application.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamp of the present application.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of another positioning member of the present application.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the clamping member of Example 1 of the present application.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the clamping member and the clamping plate in Example 2 of the present application.

[0024] Fig. 9 It is a schematic diagram of the three-dimensional structure of the clamping member of Example 2 of the present application.

[0025] Fig.10 It is an exploded schematic diagram of the clamping member in Example 2 of the present application.

[0026] Fig.11 This is a schematic diagram of the three-dimensional structure of the clamping member in Example 2 of the present application from another angle, in which the mounting block is cut.

[0027] Fig.12 It is a schematic structural diagram of the side of the splint facing away from the boss in Example 2 of the present application.

[0028] Fig.13 It is a schematic diagram of the three-dimensional structure of the third driving member 9 of the present application.

[0029] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be exaggerated relative to other elements to help improve understanding of the embodiments of the present invention.

[0030] Figure numerals: 1, machining center body; 11, bed; 12, machine head; 13, drill bit; 14, first mounting seat; 15, second mounting seat; 16, indexing plate; 17, tool setting instrument; 2, workbench; 21, mounting hole; 22, protection groove; 3, clamp; 31, clamping plate; 311, boss; 4, clamping member; 41, mounting block; 411, mounting groove; 42, clamping block; 421, connecting block; 422, long hole; 43, fixing bolt; 44, slider; 441, slide groove; 442, sliding hole; 45, first driving member; 45 1. First gear; 4511. Damping ring; 452. First drive screw; 453. Drive block; 454. Drive gear; 455. Rack; 456. Connecting rod; 46. Second drive member; 461. Second gear; 462. Second drive screw; 5. Positioning member; 51. Positioning column; 52. Positioning plate; 6. Bevel gear; 7. First transmission shaft; 8. Second transmission shaft; 9. Third drive member 9; 91. Third drive screw; 92. Bolt cap; 93. Limit nut; 94. Limit spring; 95. Baffle; 96. Warning spring. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-13 This application is described in further detail.

[0032] Embodiment 1: In the first aspect, Embodiment 1 of the present application discloses a double-head machining center, referring to Figure 1 and Figure 2 , including a machining center body 1, the machining center body 1 includes a bed 11 horizontally fixedly installed on the ground, a first mounting seat 14, a second mounting seat 15, a workbench 2 and a dividing plate 16.

[0033] Reference Figure 2 Two first linear guide rails are fixedly installed horizontally on the bed 11 by bolts, and the first mounting seat 14 is slidably installed on the first linear guide rails, and the first mounting seat 14 is driven to slide by a screw motor. A second linear guide rail is fixedly installed vertically on the first mounting seat 14, and a second mounting seat 15 is slidably installed on the second linear guide rail, and the second mounting seat 15 is also driven by a screw motor.

[0034] Reference Figure 2 and Figure 3 The indexing plate 16 is fixedly mounted on the second mounting seat 15, and the axis of the indexing plate 16 is parallel to the sliding direction of the first linear guide rail. The workbench 2 is in the shape of an octagonal plate, and a mounting plate is integrally provided on one end of the workbench 2. The mounting plate is coaxially fixedly mounted on the indexing plate 16, and the axis of the mounting plate is parallel to the table surface of the workbench 2. The workbench 2 is located in the middle of the mounting plate.

[0035] Reference Figure 2 A third linear guide is horizontally fixedly installed on the bed 11 on both sides of the workbench 2. The sliding direction of the third linear guide is perpendicular to the axis of the dividing plate 16. A machine head 12 is slidably installed on the third linear guide. Both machine heads 12 are also driven to slide by a screw motor. At the same time, the two machine heads 12 are symmetrically distributed on both sides of the axis direction of the dividing plate 16.

[0036] Reference Figure 2 A horizontal spindle is rotatably mounted on the machine head 12, and a spindle motor is fixedly mounted on the machine head 12, and the spindle motor is connected to the spindle. The two spindles are coaxial, and tool holders are coaxially mounted on the opposite ends of the two spindles. Two tool magazines are arranged on the bed 11, and the two tool magazines are used to cooperate with the two machine heads 12 to install drills 13 on the tool holders. At the same time, a probe is also installed in the tool magazine.

[0037] Reference Figure 2 and Figure 3 Two tool setting gauges 17 are fixedly mounted on the side wall of the workbench 2. The two tool setting gauges 17 are coaxial and the axis of the tool setting gauges 17 is perpendicular to the axis of the indexing plate 16. The tool setting gauges 17 are used to zero the drill bits 13. At the same time, since the tool setting gauges 17 are coaxial, the verticality of the workbench 2 can be judged by whether the actual distance between the two drill bits 13 when the two drill bits 13 are zeroed is the same as the theoretical distance when the workbench 2 is perpendicular.

[0038] Reference Figure 3 and Figure 4 A mounting hole 21 is coaxially formed on the workbench 2, and a fixture 3 is provided on the workbench 2. The fixture 3 fixes the circular semiconductor board coaxially with the mounting hole 21 on the workbench 2. The fixture 3 includes a clamp 31 and eight clamping members 4. The clamp 31 is in a circular ring shape. A protective groove 22 is coaxially formed on one side of the workbench 2, and the clamp 31 is located in the protective groove 22. This prevents the clamp 31 from contacting the equipment on the bed 11 when the workbench 2 rotates.

[0039] Reference Figure 3 and Figure 5 An annular boss 311 is coaxially arranged on one surface of the clamping plate 31, and the boss 311 is slidably installed in the mounting hole 21, and the clamping plate 31 is fixed to the workbench 2 by bolts.

[0040] Reference Figure 3 and Figure 5 A positioning member 5 is provided on the table surface of the boss 311. The positioning member 5 includes two positioning columns 51. One end of the positioning column 51 is fixedly mounted on the clamping plate, and the axis of the positioning column 51 is parallel to the axis of the boss 311. At the same time, the axis of the positioning column 51 is located on the concentric circle of the clamping plate 31. The diameter of the concentric circle is the standard diameter of the plate to be processed. When installing the clamping plate 31, first rotate the workbench 2 to vertical, and then slide the boss 311 into the mounting hole 21. When the clamping plate 31 rotates to stop and the positioning column 51 is located directly below the clamping plate 31, fix the clamping plate 31 to the workbench 2. If the bolt holes on the clamping plate 31 and the bolt holes on the workbench 2 do not correspond, it is necessary to check the workbench 2 and the clamping plate 31.

[0041] Reference Figure 3 and Figure 5 After the clamping plate 31 is installed, the circular semiconductor board is placed on the positioning column 51, and then the position of the semiconductor board is adjusted to be coaxial with the clamping plate 31 by rotating the semiconductor board.

[0042] Reference Figure 6 The positioning member 5 can also be two positioning plates 52. The two positioning plates 52 are relatively inclined and tangent to the concentric circles of the clamping plate. The diameter of the concentric circles is the standard diameter of the circular semiconductor plate to be processed.

[0043] Reference Figure 5 and Figure 7The eight clamping members 4 are all arranged on one end surface of the boss 311. The clamping member 4 includes a mounting block 41 and a clamping block 42. The eight mounting blocks 41 are fixedly mounted on the surface of the boss 311 at intervals around the axis of the clamping plate 31. The clamping block 42 is in a rectangular shape. A long hole 422 is formed through the clamping block 42. The long hole 422 is a countersunk hole. A fixing bolt 43 is passed through the long hole 422. The long hole 422 is formed along the length direction of the clamping block 42. One end of the fixing bolt 43 is arranged along the radial direction of the clamping plate 31, and is threadedly installed on the mounting block 41 through the long hole 422. Two protrusions are arranged on both ends of the length direction of the side of the clamping block 42 facing the mounting block 41. After tightening the specified bolts, the bolt cap 92 of the fixing bolt 43 presses against the step surface of the long hole 422, the two protrusions at one end of the clamping block 42 press against the mounting block 41, and the two protrusions at the other end of the protrusion press against the board surface of the semiconductor board, thereby fixing the semiconductor board on the clamping plate 31.

[0044] The implementation principle of a double-head machining center in Example 1 of the present application is as follows: before processing the semiconductor board, the workbench 2 is first rotated to vertical, and then the tool is aligned. After the tool alignment is completed and the verticality of the workbench 2 is corrected, the workbench 2 is rotated to horizontal, and the circular semiconductor board is placed on the clamping plate 31. After the positioning column 51 is rotated to adjust the semiconductor board to be coaxial with the clamping plate 31, the eight fixing bolts 43 are tightened to complete the fixed installation of the semiconductor board, and then the workbench 2 is rotated to vertical, and bidirectional drilling is performed using two drill bits 13.

[0045] In a second aspect, Example 1 of the present application discloses a double-head drilling control method, comprising the following steps: S1, clamping the workpiece; S2, tool setting; S3, confirm the verticality of workbench 2; S4. Confirm the verticality of the workpiece; S5, bidirectional punching; The workpiece is clamped in S1 using the workbench 2 and the fixture 3 in Example 1, the tool is set in S2 using the tool setting instrument 17, and the verticality of the workbench 2 in S3 is confirmed by comparing the actual relative distance between the two drill bits 13 during tool setting with the relative distance between the two drill bits 13 during standard tool setting. When drilling in S4, when the two drill bits 13 drill synchronously to the specified relative distance, one of the drill bits 13 retreats, and the other drill bit 13 continues to drill through and then retreats.

[0046] Embodiment 2: Embodiment 2 of the present application discloses a double-head machining center. The difference between Embodiment 2 and Embodiment 1 is that: Figure 8 , Fig. 9 and Fig.10A mounting groove 411 is provided on the side of the mounting block 41 facing away from the clamping plate 31, and a slider 44 is slidably installed in the mounting groove 411. The slider 44 slides along the axial direction of the clamping plate 31. A sliding groove 441 is provided on the slider 44, and the sliding groove 441 is designed as a dovetail groove. A connecting block 421 is integrally provided on the clamping block 42, and one end of the connecting block 421 is slidably installed in the sliding groove 441.

[0047] Reference Figure 8 and Fig. 9 The slide groove 441 is opened along the radial direction of the clamping plate 31 .

[0048] Reference Fig.10 and Fig.11 A first driving member 45 and a second driving member 46 are arranged in the mounting groove 411. The first driving member 45 includes a first gear 451 rotatably mounted on the slider 44. A damping ring 4511 is arranged at the rotation connection between the first gear 451 and the slider 44 to prevent the first gear 451 from reversing. A first driving screw 452 is rotatably mounted in the mounting groove 411. A driving block 453 is slidably mounted in the mounting groove 411. A driving gear 454 is rotatably mounted on the driving block 453. The first driving screw 452 coaxially passes through the driving gear 454 and the driving block 453. The first driving screw 452 is threadedly engaged with the driving block 453. The driving gear 454 is axially slidably engaged with the first driving screw 452 and is radially fixed.

[0049] Reference Fig.10 and Fig.11 , by rotating the first driving screw 452, the driving block 453 and the driving gear 454 are driven to slide, and the driving gear 454 is driven to rotate, and at this time, the driving gear 454 is meshed with the first gear 451. A rack 455 is provided on the clamping block 42, and the rack 455 is slidably installed in the slider 44 and meshed with the driving gear 454. A sliding hole 442 is opened through the slider 44, and a connecting rod 456 is fixedly installed on the rack 455, and one end of the connecting rod 456 is fixedly connected to the clamping block 42. The rotation of the driving gear 454 drives the rack 455 to slide, and then drives the clamping block 42 to slide.

[0050] Reference Fig.10 and Fig.11 The second driving member 46 includes a second gear 461 rotatably installed in the mounting groove 411. The first gear 451 and the second gear 461 are respectively located in the mounting grooves 411 at both ends of the first driving screw 452. When the driving block 453 slides to separate from the driving gear 454 and the first gear 451 and then slides a designed length, the driving gear 454 meshes with the second gear 461, and the driving gear 454 drives the second gear 461 to rotate.

[0051] Reference Fig.10 and Fig.11 A bevel gear 6 is coaxially mounted on the second gear 461, and a second driving screw 462 is rotatably mounted in the mounting groove 411. One end of the second driving screw 462 passes through the slider 44 and is threadedly engaged with the slider 44. The slider 44 is driven to slide by the rotation of the second driving screw 462. A bevel gear 6 is also coaxially mounted on the second driving screw 462. The two bevel gears 6 mesh with each other. When the second gear 461 rotates, the second driving screw 462 is driven to rotate by the cooperation between the two bevel gears 6, thereby driving the slider 44 to slide. The sliding of the slider 44 drives the clamping block 42 to press against the semiconductor board or to move away from the semiconductor board.

[0052] Reference Fig.11 and Fig.12 The first driving member 45 further includes a first transmission shaft 7, which is rotatably mounted in the mounting block 41, and one end of the first transmission shaft 7 is located in the mounting groove 411. One end of the first transmission shaft 7 located in the mounting groove 411 is connected to the first driving screw 452 through a bevel gear 6, and the other end of the first transmission shaft 7 passes through the mounting block 41 and the clamping plate 31 in sequence and is located on the side of the clamping plate 31 away from the boss 311.

[0053] Reference Figure 8 and Fig.13 A third driving member 9 is arranged on the clamping plate, and the third driving member 9 includes a third driving screw 91 which is coaxially threadedly mounted on the positioning column 51 on the side away from the dividing plate 16, one end of the third driving screw 91 passes through the clamping plate 31 and is located on the side of the clamping plate 31 away from the boss 311, and a bevel gear 6 is coaxially mounted on one end of the third driving screw 91 which is located on the side of the clamping plate 31 away from the boss 311, and the third driving screw 91 slides axially with the bevel gear and is circumferentially fixed.

[0054] Reference Fig.12 and Fig.13 Eight second transmission shafts 8 are rotatably installed on the side of the clamping plate 31 away from the boss 311, and a bevel gear 6 is coaxially installed on both ends of the second transmission shaft 8. One of the second transmission shafts 8 is connected to the third driving screw 91 through the bevel gear 6, and the other end of the second transmission shaft 8 is connected to the first transmission shaft 7 through the bevel gear 6. One end of the second second transmission shaft 8 is connected to the first transmission shaft 7 through the bevel gear 6, and the other end of the second second transmission shaft 8 is connected to the second transmission shaft through the bevel gear 6. The eight second transmission shafts 8 are connected in sequence in the above method, and the eight first transmission shafts 7 are also connected to the second transmission shaft 8 in the above method to receive the power of the positioning column 51.

[0055] Reference Figure 8 and Fig.13A bolt cap 92 is coaxially and integrally provided on one end of the third driving screw 91 located on one side of the positioning column 51, and two limit nuts 93 are threadedly installed on the third driving screw 91 between the bolt cap 92 and the positioning column 51. A limit spring 94 is sleeved on the third driving screw 91 between the fiber nuts, and the two ends of the limit spring 94 are respectively pressed against the two limit nuts 93. By adjusting the position of the limit nuts 93, the distance that the third driving screw 91 can rotate on the positioning column 51 can be adjusted, and the limit spring 94 is used to prevent the limit nuts 93 from loosening.

[0056] Reference Figure 8 and Fig.13 A baffle plate 95 is threadedly mounted on one end of the third driving screw 91 on the side where the second transmission shaft is mounted on the clamping plate. A warning spring 96 is sleeved on the third driving screw 91 between the baffle plate 95 and the bevel gear 6 on the third driving screw 91. The two ends of the warning spring 96 are respectively pressed against the bevel gear 6 and the baffle plate 95.

[0057] The implementation principle of a double-head machining center in Example 2 of the present application is as follows: after placing the semiconductor board on the boss 311, the workbench 2 is rotated until it is tilted and the positioning column 51 is located at the lower side of the rotation axis of the workbench 2, and the semiconductor board is rotated until the semiconductor board is adjusted to be coaxial with the clamping plate, and the third driving screw 91 is rotated. The third driving screw 91 drives the eight second transmission shafts 8 to rotate, the second transmission shaft 8 drives the first transmission shaft 7 to rotate, the first transmission shaft 7 drives the first driving screw 452 to rotate, the first driving screw 452 drives the driving block 453 to slide and drives the driving gear 454 to rotate, and the driving The gear 454 drives the first gear 451 to rotate, and the first gear 451 drives the rack 455 to slide and push a section of the clamping block 42 to slide into the range of the semiconductor board. At this time, the driving block 453 drives the driving gear 454 to separate from the first gear 451, and then engages with the second gear 461 after moving a fixed distance, and then drives the second gear 461 to rotate through the driving gear 454. The second gear 461 drives the second driving screw 462 to rotate through the bevel gear 6. The rotation of the second driving screw 462 drives the slider 44 to slide, and then drives the clamping block 42 to clamp the semiconductor board through the sliding of the slider 44.

[0058] When the clamp 42 is pressed against the semiconductor board, the positioning nut is pressed against the positioning column 51, and the third drive screw 91 stops rotating. At the same time, when the positioning nut is close to the positioning column 51, the warning spring 96 will push the bevel gear 6 on the third drive screw 91 to press against the bevel gear 6 on the second transmission shaft 8, thereby increasing the force required to rotate the third drive screw 91 and issuing a warning to the operator.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double-head machining center, comprising a machining center body (1), the machining center body (1) comprising a bed (11) and a workbench (2), the workbench (2) being mounted on the bed (11), and a fixture (3) being arranged on the workbench (2), characterized in that: A machine head (12) is horizontally slidably mounted on the bed (11) on opposite sides of the fixture (3), the two machine heads (12) slide in parallel, a drill bit (13) is rotatably mounted on the machine head (12), and the two drill bits (13) are coaxial.

2. A double-head machining center according to claim 1, characterized in that: A first mounting seat (14), a second mounting seat (15) and a dividing plate (16) are arranged on the bed (11); the first mounting seat (14) is horizontally slidably mounted on the bed (11); the second mounting seat (15) is vertically lifted and lowered on the first mounting seat (14); the dividing plate (16) is mounted on the second mounting seat (15); the workbench (2) is mounted on the dividing plate (16); the axis of the dividing plate (16) is parallel to the sliding direction of the first mounting seat (14); and the sliding direction of the first mounting seat (14) is perpendicular to the sliding direction of the machine head (12).

3. A double-head machining center according to claim 2, characterized in that: The workbench (2) is provided with a mounting hole (21) extending therethrough. The fixture (3) comprises an annular clamping plate (31) and a plurality of clamping members (4). The clamping plate (31) is mounted on the workbench (2). The clamping plate (31) is connected to the mounting hole (21). The clamping members (4) are mounted on the clamping plate (31) and are distributed around the inner hole of the clamping plate (31). The workpiece is located in an enclosed area of ​​the clamping members (4). The clamping members (4) clamp and fix the workpiece on the clamping plate (31). The workpiece is located in the mounting hole (21).

4. A double-head machining center according to claim 3, characterized in that: A positioning piece (5) is mounted on one surface of the clamping plate (31) on which the clamping piece (4) is mounted.

5. A double-head machining center according to claim 4, characterized in that: The mounting hole (21) is circular, the clamping plate (31) is annular, and an annular boss (311) is coaxially arranged on one surface of the clamping plate (31), and the boss (311) is slidably mounted in the mounting hole (21).

6. A double-head machining center according to claim 3, characterized in that: Two tool setting instruments (17) are installed on the side wall of the workbench (2), the two tool setting instruments (17) are coaxial, and the two tool setting instruments (17) are respectively used to set the two drill bits (13), and the tool setting direction of the tool setting instrument (17) is parallel to the normal of the workbench (2) surface of the workbench (2).

7. A double-head machining center according to claim 3, characterized in that: The clamping member (4) comprises a mounting block (41) and a clamping block (42); the mounting block (41) is mounted on the clamping plate (31); a fixing bolt (43) is provided on the mounting block (41); one end of the clamping block (42) is mounted on the mounting block (41) via the fixing bolt (43); and the other end of the clamping block (42) is pressed against a workpiece.

8. A double-head machining center according to claim 5, characterized in that: The clamping member (4) comprises a mounting block (41) and a clamping block (42); the mounting block (41) is mounted on the clamping plate (31); a slider (44) is slidably mounted on the mounting block (41); the clamping block (42) is slidably mounted on the slider (44) in a direction approaching or moving away from a clamping area of ​​the clamping plate (31); the slider (44) is used to push the clamping block (42) against a workpiece; a first driving member (45) is provided in the mounting block (41) for driving the clamping block (42) to slide; a second driving member (46) is provided in the mounting block (41) for driving the slider (44) to slide; the second driving member (46) is connected to the first driving member (45) in transmission connection; a third driving member (9) is provided on the clamping plate (31); the first driving member (45) is connected to the third driving member (9) in transmission connection.

9. A double-head machining center according to claim 8, characterized in that: The third driving member (9) comprises a third driving screw rod (91) threadedly mounted on the clamping plate (31), one end of the third driving screw rod (91) being drivingly connected to the first driving member (45), two limiting nuts (93) being threadedly mounted on the third driving screw rod (91), a limiting spring (94) being sleeved on the third driving screw rod (91) between the two limiting nuts (93), and two ends of the limiting spring (94) respectively pressing against the two limiting nuts (93).

10. A double-end drilling control method, comprising the following steps: S1, clamping the workpiece; S2, tool setting; S3. Check the verticality of the workbench (2); S4. Confirm the verticality of the workpiece; S5, bidirectional punching; The invention is characterized in that: S1, S2 and S3 are all operated by a double-head machining center as described in any one of claims 1 to 9, and the verticality of the workbench (2) in S3 is confirmed by comparing the actual relative distance between the two drill bits (13) during tool setting with the relative distance between the two drill bits (13) during standard tool setting. When drilling in S4, when the two drill bits (13) drill synchronously to a specified relative distance, one of the drill bits (13) retracts, and the other drill bit (13) continues to drill through and then retracts.

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