GB2452295A - CNC machine tool having a sliding member moveable at a high s peed - Google Patents

CNC machine tool having a sliding member moveable at a high s peed Download PDF

Info

Publication number
GB2452295A
GB2452295A GB0716861A GB0716861A GB2452295A GB 2452295 A GB2452295 A GB 2452295A GB 0716861 A GB0716861 A GB 0716861A GB 0716861 A GB0716861 A GB 0716861A GB 2452295 A GB2452295 A GB 2452295A
Authority
GB
United Kingdom
Prior art keywords
sliding member
direction
machine tool
member
sliding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0716861A
Other versions
GB0716861D0 (en
Inventor
Feng-Tien Chen
Original Assignee
Feng-Tien Chen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Feng-Tien Chen filed Critical Feng-Tien Chen
Priority to GB0716861A priority Critical patent/GB2452295A/en
Publication of GB0716861D0 publication Critical patent/GB0716861D0/en
Publication of GB2452295A publication Critical patent/GB2452295A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25Movable or adjustable work or tool supports
    • B23Q1/44Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/56Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/60Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/601Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism a single sliding pair followed parallelly by a single sliding pair
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25Movable or adjustable work or tool supports
    • B23Q1/44Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/445Movable or adjustable work or tool supports using particular mechanisms using a first carriage for a smaller workspace mounted on a second carriage for a larger workspace, both carriages moving on the same axes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00Automatic control or regulation of feed movement, cutting velocity or position of tool or work

Abstract

A machine tool includes a machine body (10), a first driving unit (30), a first sliding member (40) driven by the first driving unit (30) to move on the machine body (10) along a direction, a second driving unit (60) disposed on the first sliding member (40), and a second sliding member (70) driven by the second driving unit (60) to move on the first sliding member (40) along the direction.

Description

1 2452295 CNC MCBXNE TOOL H&VXNG A SLIDING

MEMBER MOVABLE AT A HIGH SPEED

This invention relates to a machine tool, and more particularly to a CNC (Computer-Numerical-Controlled) machine tool.

Referring to Fig. 1, a conventional CNC machine tool includes a machine body 1 consisting of a bottom seat 101 and a post member 102, a base 2 movable on the bottom seat 101 along a Y-axis direction, a worktable 3 movable on the base 2 along an X-axis direction, a driving unit 4 disposed on the post member 102, and a spindle seat 5 driven by the driving unit 4 to move on the post member 102 along a Z-axis direction. A workpiece (not shown) can be held on the worktable 3. The driving unit 4 includes a servomotor 401 and a threaded rod 402 driven by the servomotor 401 and journalled on the post member 102. The spindle seat 5 is movable vertically relative to the workpiece on the worktable 3 in response to rotation of the threaded rod 402.

The spindle seat 5 holds a cutter (not shown) for performing a cutting operation on the workpiece. When a first cutting operation is completed, a first cutter is removed from the workpiece, and is moved upwardly from a cutting position adjacent to the workpiece to a safety position by a first distance. Next, the first cutter is further moved upwardly to a cutter-exchanging position by a second distance. In the cutter-exchanging position, an * 2 automatic cutter-changing device (not shown) is operated to first remove the fist cutter from the spindle seat 5 and subsequently move a second cutter onto the spindle seat 5. When the cutter-exchanging operation is completed, the second cutter is moved downwardly to the safety position by the second distance, and subsequently is further moved downwardly to the cutting position by the first distance for performing a subsequent cutting operation on the workpiece. Since the first and second cutters are moved on the post member 102 by only the spindle seat 5, a significant amount of time is necessary for such a cutter exchange operation, thereby reducing the production capacity of the CNC machine tool. Furthermore, the length of the threaded rod 402 and the height of the post member 102 are substantial due to such sole reliance on the spindle seat 5 for movement of the first and second cutters. As a result, the volume and the fabrication costs of the CNC machine tool are increased.

The object of this invention is to provide a CNC machine tool that can overcome the above-mentioned drawbacks

associated with the prior art.

According to this invention, a machine tool includes: a machine body; a first driving unit; a first sliding member driven by the first driving unit to move on the machine body along a direction; a second driving unit disposed between the first and S 3 second sliding members; and a second sliding member driven by the second driving unit to move on the first sliding member along the direction.

If a spindle unit is mounted on the second sliding member, when the first and second sliding members are driven respectively and simultaneously by the first and second driving units, the spindle unit will move on the machine body at a high speed. Thus, the production capability of the CNC machine tool can be increased.

These and other features and advantages of this invention will become apparent in the following detailed description of the preferred embodiments of this invention, with reference to the accompanying drawings, in which: Fig. 1 is a perspective view of a conventional CNC machine tool; Fig. 2 is a perspective view of the first preferred embodiment of a CNC machine tool according to this invention; Fig. 3 is a partly exploded perspective view of the first preferred embodiment; Fig. 4 is a side view of the first preferred embodiment, illustrating how an automatic cutter-changing device is mounted thereto; Fig. 5 is a partly sectional view of the first preferred embodiment when a spindle unit is disposed in a cutter-exchanging position; O 4 Fig. 6 is a partly sectional view of the first preferred embodiment when the spindle unit is disposed in a cutting position; Fig. 7 is a perspective view of the second preferred embodiment of a CNC machine tool according to this invention; Fig. 8 is a front view of the third preferred embodiment of a CNC machine tool according to this invention; Fig. 9 is a sectional view of the third preferred embodiment; Fig. 10 is a perspective view of the fourth preferred embodiment of a CNC machine tool according to this invention; Fig. 11 is a partly sectional view of the fourth preferred embodiment; and Fig. 12 is a fragmentary sectional view of the fourth preferred embodiment taken along Line XII-XII in Fig. 11.

Before the present invention is described in greater detail in connection with the preferred embodiments, it should be noted that similar elements and structures are designated by like reference numerals throughout the entire

disclosure.

Referring to Figs. 2, 3, and 4, the first preferred embodiment of a CNC machine tool according to this invention includes a machine body 10, a worktable unit 20, a first driving unit 30 disposed on the machine body 10, a first sliding member 40 disposed on the machine body 10, a first 5 linear rail unit 50 disposed between the machine body 10 and the first sliding member 40, a second driving unit 60 disposed on the first sliding member 40, a second sliding member 70 disposed on the first sliding member 40, a second linear rail unit 80 disposed between the first and second sliding members 40, 70, and a spindle unit 90 disposed on the second sliding member 70.

The machine body 10 includes a bottom seat 1]. and a post member 12 fixed on and extending upwardly from the bottom seat 11 along a Z-axis direction. In this embodiment, the Z-axis direction is a vertical direction. An automatic cutter-changing device 100 (see Fig. 4) can be mounted to a top end of the post member 12.

The worktable unit 20 includes a Y-direction driving unit 21 disposed on the bottom seat 11, a Y-direction sliding member 22 movable on the bottom seat 11 along a Y-axis direction, a Y-direction linear rail unit 23 disposed between the bottom seat 11 and the Y-directiori sliding member 22, an X-direction driving unit 24 disposed on the Y-direction sliding member 22, a worktable 25 disposed on the Y-direction sliding member 22, and an X-direction linear rail unit 26 disposed between the Y-direction sliding member 22 and the worktable 25. The Y-direction driving unit 21 includes a servomotor 211 and a Y-direction threaded rod 212 journalled on a top portion of the bottom seat 11 and driven by the servomotor 211 to rotate. The Y-direction threaded rod 212 extends along the S 6 Y-axis direction. The X-direction driving unit 24 includes a servomotor 241 and an X-direction threaded rod 242 journalled on a top portion of the Y-direction sliding member 22 and driven by the servomotor 241 to rotate. The servomotor 211 is operable to rotate the Y-direction threaded rod 212 to thereby move the worktable 25 forwardly and rearwardly relative to the post member 12 along the Y-axis direction. The servomotor 24]. is operable to rotate the X-direction threaded rod 242 to thereby move the worktable 25 leftwardly and rightwardly relative to the post member 12 along an X-axis direction.

The first driving unit 30 includes a first servomotor 31 and a first threaded rod 32 journalled on the post member 12 and driven by the first servomotor 31 to rotate. The first threaded rod 32 extends along the Z-axis direction.

The first sliding member 40 is disposed on a front surface of the post member 12, and includes a fixed first internal thread member 41 engaging the first threaded rod 32. The first sliding member 40 is driven by the first driving unit 30 to move vertically relative to the post member 12 along the Z-axis direction.

The first linear rail unit 50 includes two parallel first slide rails 51 disposed fixedly on the front surface of the post member 12 and extending along the Z-axis direction, and two first sliding block units disposed fixedly on a rear surface of the first sliding member 40 and slidable respectively along the first slide rails 51. S 7

In this embodiment, each of the first sliding block units consists of two first sliding blocks 52, each of which is connected to the corresponding slide rail 51 by a dovetail tongue and groove engagement.

The second driving unit 60 includes a second servomotor 61 and a second threaded rod 62 journalled on a front surface of the first sliding member 40 and driven by the second servomotor 61 to rotate. The second threaded rod 62 extends along the Z-axis direction. The first and second driving units 30, 60 are capable of being operated simultaneously.

The second sliding member 70 includes a second internal thread member 71 engaging the second threaded rod 62. Upon simultaneous operation of the first and second driving units 30, 60, the first sliding member 40 is moved on the post member 12, and the second sliding member 70 is moved on the first sliding member 40. Hence, the spindle unit can move relative to the worktable 25 along the Z-axis direction at a high speed.

The second linear rail unit 80 includes two parallel second slide rails 81 fixed on a rear surface of the second sliding member 70 and extending along the Z-axis direction, and two second sliding block units disposed fixedly on a front surface of the first sliding member 40 and slidable respectively along the second slide rails 8.1. In this embodiment, each of the second sliding block units consists of two second sliding blocks 82.

The spindle unit 90 extends along the Z-axis direction, and has a bottom portion mounted with a cutter 91 for performing a cutting operation on a workpiece (not shown) held on the worktable 25.

As such, with particular reference to Fig. 4, by simultaneous operation of the first and second driving units 30, 60, the cutter 91 is movable along the Z-axis direction among a cutter-changing position (I) shown in Fig. 5, asafetyposition (II), andacuttingposition (III) shown in Fig. 6. Inthecutter-changingposition (I), with particular reference to Fig. 5, the first sliding member is disposed in an upper limit position relative to the post member 12, and the second sliding member 70 is disposed in an upper limit position relative to the first sliding member 40. In the cutting position, with particular reference to Fig. 6, the first sliding member 40 is disposed in a lower limit position relative to the post member 12, and the second sliding member 70 is disposed in a lower limit position relative to the first sliding member 40.

In view of the above, the CNC machine tool of this invention has the following advantages: (1) The cutter 91 can be moved along the Z-axis direction at a high speed, thereby promoting the production capability of the CNC machine tool, such as by reducing the time required to perform a cutter-changing operation.

(2) Since the cutter 91 is disposed on the second sliding member 70, and the second sliding member 70 is movable relative to the first sliding member 40, the distance traveled by the first sliding member 40 is shortened.

As such, the first and second threaded rods 32, 62 are shorter than the threaded rod 402 (see Fig. 1) of the above-mentioned conventional CNC machine tool.

As a consequence, the volume of the CNC machine tool is reduced. Furthermore, the CNC machine tool is manufactured at a low cost.

Fig. 7 shows the second preferred embodiment of a CNC machine tool according to this invention, which is similar in construction to the first preferred embodiment except that the second linear rail unit 80' includes two second slide rails 8].' disposed fixedly on the first slidingmember 40, and two second sliding block units disposed fixedly on the second sliding member 70 and slidable respectively along the second slide rails 81'. In this embodiment, each of the second sliding block units consists of two second sliding blocks 82'.

With reference to Figs. 8 and 9, the third preferred embodiment of a CNC machine tool according to this invention includes a Y-direction driving unit 21 disposed on a bottom seat 11 of a machine body 10, a Y-direction sliding member 22 disposed on the bottom seat 11, a Y-direction linear rail unit 23 disposed between the bottom seat 11 and the Y-direction sliding member 22, a first driving unit 30 disposed on the Y-direction sliding member 22, a first O 10 sliding member 40 disposed movably on the 1-direction sliding member 22, a first linear rail unit 50 disposed between the 1-direction sliding member 22 and the fist sliding member 40, a second driving unit 60 disposed on the first sliding member 40, a second sliding member 70 disposed movably on the first sliding member 40, and a second linear rail unit 80 disposed between the first and second sliding members 40, 70. The second sliding member is configured as a worktable.

When the first and second driving units 30, 60 are operated simultaneously, the first sliding member 40 is moved on the bottom seat 11 along the X-axis direction at a first speed, and the second sliding member 70 is moved on the first sliding member 40 along the X-axis direction at the first speed. Stated differently, the second sliding member 70 is moved relative to the bottom seat 11 along the X-axis direction at a high, second speed that is double the first speed.

Figs. 10, 11, and 12 show the fourth preferred embodiment of a CNC machine tool according to this invention, which is similar in construction to the first preferred embodiment except that the second driving unit 60 is configured as a linear motor. The second driving unit 60 includes an elongated stator member 61' disposed fixedly on the first sliding member 40 and mounted with a plurality of permanent magnets (not shown), and a slider 62' having a ti-shaped cross-section, disposed fixedly on the second sliding member 70, and straddling the stator member 61'.

When the linear motor 60 is operated, a magnetic levitation force is generated between the stator member 61' and the slider 62' to move the slider 62' relative to the stator member 61'. O 12

Claims (12)

  1. CLAIMS: 1. A machine tool comprising: a machine body; a first driving unit; a first sliding member driven by the first driving unit to move on the machine body along a direction; a second driving unit disposed between the first and second sliding members; and a second sliding member driven by the second driving unit to move on the first sliding member along the direction.
  2. 2. The machine tool as claimed in Claim 1, wherein the first driving unit includes a first servomotor and a first threaded rod driven by the first servomotor to rotate on the machine body, the first threaded rod extending along the direction, the first sliding member including a fixed first internal thread member engaging the first threaded rod.
  3. 3. The machine tool as claimed in Claim 2, wherein the second driving unit includes a second servomotor and a second threaded rod driven by the second servomotor to rotate on the first sliding member, the second threaded rod extending along the direction, the second sliding member including a fixed second internal thread member engaging the second threaded rod.
  4. 4. The machine tool as claimed in Claim 3, further comprising a first linear rail unit including two first slide rails disposed fixedly on the machine.body and extending along the direction, and two first sliding block units disposed fixedly on the first sliding member and slidable respectively along the first slide rails.
  5. 5. The machine tool as claimed in Claim 4, further comprising a second linear rail unit including two second slide rails disposed fixedly on the second sliding member and extending along the direction, and two second sliding block units disposed fixedly on the first sliding member and slidable respectively along the two second slide rails.
  6. 6. The machine tool as claimed in Claim 5, wherein the machine body includes a bottom seat and a post member fixed on and extending upwardly from the bottom seat, the direction being a vertical direction, the machine tool further comprising a spindle unit disposed on the second sliding member and extending along the direction.
  7. 7. The machine tool as claimed in Claim 5, wherein the machine body includes a bottom seat and a post member fixed on and extending upwardly from the bottom seat, the direction being a horizontal direction, the second sliding member being configured as a worktable.
  8. 8. The machine tool as claimed in Claim 4, further comprising a second linear rail unit including two second slide rails disposed fixedly on the first sliding member and extending along the direction, and two second sliding block units disposed fixedly on the second sliding member and slidable respectively along the second slide rails.
  9. 9. The machine tool as claimed in Claim 8, wherein the machine body includes a bottom seat and a post member fixed on and extending upwardly from the bottom seat, the direction being a vertical direction, the machine tool further comprising a spindle unit disposed on the second sliding member and extending along the direction.
  10. 10. The machine tool as claimed in Claim 8, wherein the niachine body includes a bottom seat and a post member fixed on and extending upwardly from the bottom seat, the direction being a horizontal direction, the second sliding member being configured as a worktable.
  11. 11. The machine tool as claimed in Claim 1, wherein the second driving' unit is configured as a linear motor including an elongated stator member disposed fixedly on the first sliding member, and a slider disposed fixedly on the second sliding member and straddling the stator member such that a magnetic levitation force is generated therebetween to move the slider relative to the stator member when the linear motor is operated.
  12. 12. Amachine tool substantiallyas hereinbefore described with reference to and as illustrated in Figures 2 to 12 of the accompanying drawings.
GB0716861A 2007-08-30 2007-08-30 CNC machine tool having a sliding member moveable at a high s peed Withdrawn GB2452295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0716861A GB2452295A (en) 2007-08-30 2007-08-30 CNC machine tool having a sliding member moveable at a high s peed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0716861A GB2452295A (en) 2007-08-30 2007-08-30 CNC machine tool having a sliding member moveable at a high s peed

Publications (2)

Publication Number Publication Date
GB0716861D0 GB0716861D0 (en) 2007-10-10
GB2452295A true GB2452295A (en) 2009-03-04

Family

ID=38616990

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0716861A Withdrawn GB2452295A (en) 2007-08-30 2007-08-30 CNC machine tool having a sliding member moveable at a high s peed

Country Status (1)

Country Link
GB (1) GB2452295A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104493614A (en) * 2014-12-19 2015-04-08 无锡大龙马数控机床制造有限责任公司 Z-axis feed drive device with counterweight balance

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1293615A (en) * 1969-05-15 1972-10-18 Kearney & Trecker Corp Tool change mechanism for a machine tool
US4122597A (en) * 1977-05-02 1978-10-31 The Monarch Machine Tool Company Tool utilization mechanism
US4763886A (en) * 1986-12-26 1988-08-16 Nippon Thompson Co., Ltd. XY-positioning table
US4897588A (en) * 1988-07-21 1990-01-30 Nippon Thompson Co., Ltd. Double motor feed control system
US5751586A (en) * 1995-12-01 1998-05-12 Grabovac; Bosko CNC machine tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1293615A (en) * 1969-05-15 1972-10-18 Kearney & Trecker Corp Tool change mechanism for a machine tool
US4122597A (en) * 1977-05-02 1978-10-31 The Monarch Machine Tool Company Tool utilization mechanism
US4763886A (en) * 1986-12-26 1988-08-16 Nippon Thompson Co., Ltd. XY-positioning table
US4897588A (en) * 1988-07-21 1990-01-30 Nippon Thompson Co., Ltd. Double motor feed control system
US5751586A (en) * 1995-12-01 1998-05-12 Grabovac; Bosko CNC machine tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104493614A (en) * 2014-12-19 2015-04-08 无锡大龙马数控机床制造有限责任公司 Z-axis feed drive device with counterweight balance

Also Published As

Publication number Publication date
GB0716861D0 (en) 2007-10-10

Similar Documents

Publication Publication Date Title
ES2313980T3 (en) Machine tool.
CN1323803C (en) Fast vertical/horizontal type boring and milling automatic processing center
KR20120081970A (en) Double spindle gang type cnc lathe
CN201415278Y (en) Double-beam planer type milling machine
CN101239530B (en) Stereo carving machine
CN202846171U (en) Sliding operating platform
CN103231246B (en) A kind of vertical numerical control drilling and milling machine tool
US9610668B2 (en) CNC dual-spindle transmission device
CN203401346U (en) Vertical type metal machining center machine
CN203316803U (en) Four-shaft linkage numerical control engraving and milling machine
CN202180495U (en) Plastic foam cutting machine
CN201970090U (en) Vertical-horizontal combined machining center
US20120020755A1 (en) Horizontal machine tool
CN101879632B (en) Cutting machine capable of automatically feeding
CN204771603U (en) Mobilizable numerical control machine tool of workstation
US9381607B2 (en) Feeding device and machine tool using the same
CN202715863U (en) General double-Y-axis numerically-controlled planer type milling machine
US8881626B2 (en) Lathe for machining curved surfaces
DE102009033649B4 (en) Beamsaw
CN201399607Y (en) Horizontal milling machine structure
CN102205437B (en) Four-head four-station numerically controlled milling machine for clamp blade edge
CA2316570A1 (en) High-speed production unit for machining operations
CN201423532Y (en) Numerical control machine
CN203712259U (en) Efficient numerical control milling and drilling machine tool
CN105127768B (en) Machine tool guide carriage component

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)