CN112872873A - Press tool changing device - Google Patents
Press tool changing device Download PDFInfo
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- CN112872873A CN112872873A CN202110302687.4A CN202110302687A CN112872873A CN 112872873 A CN112872873 A CN 112872873A CN 202110302687 A CN202110302687 A CN 202110302687A CN 112872873 A CN112872873 A CN 112872873A
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- cutter
- fixed
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- cylinder
- traction
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- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
- B23Q3/1552—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling parts of devices for automatically inserting or removing tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
The invention discloses a cutter changing device of a press, which comprises a cutter changing frame fixed on an upper machine body, wherein a cutter is connected to the cutter changing frame in a sliding manner, a limiting cylinder is installed on the upper machine body, the end part of a piston rod of the limiting cylinder is connected with a limiting plate for limiting the sliding stroke of the cutter, a plurality of cylinder bodies of traction oil cylinders are fixed on the upper machine body, traction pieces for hanging and pulling the cutter to move upwards are respectively fixed at the end parts of the piston rods of the traction oil cylinders, and a plurality of electric permanent magnetic chucks for adsorbing and fixing the cutter are installed in the upper machine body; the press tool changer has the advantages of high automation degree, less manual operation action during tool changing, high tool changing efficiency and high tool changing safety.
Description
Technical Field
The invention relates to the field of mechanical tool changing, in particular to a tool changing device of a press.
Background
The adjustment of the cutter in the press and the change in-process all need take out the cutter and put back, and the cutter is heavier and very sharp, gets the in-process at the round trip of carrying the artifical transport tool changing, if misoperation makes its landing, can cause the injury to the staff.
Referring to the attached drawing 1 of the specification, chinese patent with the prior publication number of CN110815365A discloses an upper die holder 2, an upper die plate 4, a lower die plate 3 and a lower die holder 1 which are sequentially arranged from top to bottom, wherein the lower die holder 1 is fixed on a die cutting machine, the lower die plate 3 is positioned on the upper surface of the lower die holder 1, the upper die plate 4 is positioned on the lower surface of the upper die holder 2, a knife is fixed on the lower surface of the upper die plate 4, four corners of the lower die holder 1 are all penetrated by lifting rods 5, and the tops of the lifting rods 5 are fixedly connected with the upper die holder 2. When the lifting rod 5 drives the upper die holder 2 to descend, the upper die plate 4 is pressed on the lower die plate 3, and die cutting of the material belt by the knife is achieved. A pair of L-shaped and symmetrical guide rails 24 are further fixed at one end of the lower die holder 1 facing the operation side of the die cutting machine, chamfers 25 are arranged at two ends of each guide rail 24, and the lower template 3 contacts the chamfers 25 firstly when moving from the lower die holder 1 to the guide rails 24; because lower bolster 3 is heavier metal sheet, after pulling out lower bolster 3, guide rail 24 holds lower bolster 3, can conveniently clear up the waste material that glues on lower bolster 3 on guide rail 24, need not to carry lower bolster 3, labour saving and time saving. The upper surface of the lower die holder 1 is provided with a groove 26, and the bottom of the groove 26 is along the conveying direction of the material belt. The upper surface of the upper die holder 2 is vertically screwed with a plurality of locking upright posts 6, the locking upright posts 6 penetrate through the upper die holder 2, and the lower surface of the upper die holder 2 is tightly attached with square bars 7. The square bar 7 is provided with a vertical threaded hole 8.
The principle of the above-mentioned comparison document is: when the upper die plate 4 is installed on the upper die base 2, the upper die plate 4 and the square bars 7 are firstly in plug-in fit (namely the square bars 7 are inserted into the through grooves 9 on the upper surface of the upper die plate 4), then one locking vertical rod 6 is rotated to enable the locking vertical rod to penetrate through the square bars 7 and be in threaded connection with the internal thread grooves 10 of the upper die plate 4, then the rest locking vertical rods 6 are rotated to the internal thread grooves 10 of the upper die plate 4, the horizontal direction of the upper die plate 4 can be positioned, finally, the L-shaped plate 12 is upwards pulled by the air cylinder 11 to clamp the upper die plate 4, and the vertical direction of the upper die plate 4 can.
The fast-changing die-cutting device has the advantages that the blade is fixed and reliable after changing, but the fast-changing die-cutting device still has some defects, such as: the manual operation steps are more when the tool is changed, and the automation level of tool changing is low, so that the tool changing efficiency is low, and accidents are easy to happen when the tool is changed.
Disclosure of Invention
In view of the problems mentioned in the background, the invention aims to provide a tool changing device of a press so as to solve the problems mentioned in the background.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a press toolchanger, is including fixing the tool changing frame on last fuselage, it is connected with the cutter to slide on the tool changing frame, install spacing cylinder on the upper machine body, the piston rod end connection of spacing cylinder has and is used for the restriction the limiting plate of cutter stroke of sliding, be fixed with the cylinder body that a plurality of pulled the hydro-cylinder on the upper machine body, a plurality of the piston rod end of pulling the hydro-cylinder is fixed with respectively and is used for articulating the pulling the piece that pulls that the cutter went upward, it is used for with to install a plurality of in the fuselage go up the electric permanent magnetic chuck that the cutter adsorbs fixedly.
Through the technical scheme, the press tool changer has the advantages of high automation degree when changing tools, less manual operation actions when changing tools, high tool changing efficiency and high tool changing safety; when the cutter is replaced, the cutter can be pushed on the cutter replacing frame, the cutter is enabled to be abutted against and limited by a limiting plate connected with the end part of a limiting cylinder, then a traction oil cylinder on the upper machine body can be started to drive a traction piece to lift the cutter to an appointed height, and then the cutter is firmly adsorbed and fixed by utilizing an electric permanent magnetic chuck.
Preferably, the cutter is fixed on the cutter fixing guide rail, the cutter changing frame is provided with a cutter changing frame guide rail, and the cutter fixing guide rail is horizontally connected on the cutter changing frame guide rail in a sliding manner.
Through the technical scheme, the cutter fixing guide rail can be used for facilitating the fixation of the cutter, and the cutter changing frame guide rail can be used for facilitating the sliding of the cutter fixing guide rail.
Preferably, the cutter and the cutter fixing guide rail are fixedly connected through a plurality of bolts, and the cutter changing frame guide rail is fixed on the upper machine body through a plurality of bolts.
Through the technical scheme, the guide rail of the tool changing frame and the upper machine body can be conveniently fixed by using the bolt, and the cutter fixing guide rail can be conveniently connected and fixed by using the bolt.
Preferably, the traction piece comprises a hanging block and a hanging groove, the hanging block is fixed at the end part of the piston rod of the traction oil cylinder, and the hanging groove is formed in the cutter fixed guide rail and used for the hanging block to be clamped in.
Through above-mentioned technical scheme, can conveniently promote the cutter after hanging the groove when the hanging piece card in the piece that pulls.
Preferably, the upper machine body is connected above the lower machine body in a sliding manner along the vertical direction, a jacking oil cylinder is fixed on the lower machine body, and the end part of a piston rod of the jacking oil cylinder is fixedly connected with the upper machine body.
Through the technical scheme, the upper machine body can be jacked up by utilizing the jacking oil cylinder fixed on the lower machine body, so that the operation is convenient.
Preferably, a pressure sensor is fixed on the limiting plate, a controller is fixed on the upper machine body, the pressure sensor is electrically connected with a control input end of the controller, and a control output end of the controller is electrically connected with the traction oil cylinder and the electric permanent magnetic chuck.
Through above-mentioned technical scheme, when pressure sensor perception collided the cutter on the limiting plate, can feed back the high-low level change to the controller, the controller can obtain the signal, and then control traction cylinder and electric permanent magnetic chuck and move.
Preferably, the end part of a piston rod of the traction oil cylinder is connected with a traction rod through a coupler, and the end part of the traction rod is connected with the traction piece used for hanging and pulling the cutter to move upwards.
Through the technical scheme, the traction rod connected by the coupler can facilitate the connection of the traction piece.
Preferably, the side lines of the cutter fixing guide rail and the cutter changing frame guide rail are respectively provided with a fillet.
Through above-mentioned technical scheme, the setting of fillet can reduce stress concentration phenomenon to can prevent the fish tail.
Preferably, a plurality of guide rods are fixed on the cutter fixing guide rail and are respectively connected with the cutter changing frame guide rail in a sliding manner.
Through above-mentioned technical scheme, utilize the guide arm can provide vertical direction to the cutter of lift process.
Preferably, a bearing is arranged at the end part of a piston rod of the traction oil cylinder.
Through above-mentioned technical scheme, the stability when drawing the cutter can be improved in the setting of bearing to can reduce corresponding impact.
In summary, the invention mainly has the following beneficial effects:
the press tool changer has the advantages of high automation degree when changing tools, less manual operation actions when changing tools, high tool changing efficiency and high tool changing safety; when the cutter is replaced, the cutter can be pushed on the cutter replacing frame, the cutter is enabled to be abutted against and limited by a limiting plate connected with the end part of a limiting cylinder, then a traction oil cylinder on the upper machine body can be started to drive a traction piece to lift the cutter to an appointed height, and then the cutter is firmly adsorbed and fixed by utilizing an electric permanent magnetic chuck.
Drawings
FIG. 1 is a drawing of a description of a reference document in the prior art;
FIG. 2 is one of the schematic structural diagrams of the present invention;
FIG. 3 is a second schematic structural diagram of the present invention;
FIG. 4 is a third schematic view of the present invention;
FIG. 5 is a fourth schematic structural view of the present invention;
FIG. 6 is a fifth schematic view of the present invention.
Reference numerals: 1. an upper body; 2. changing a tool rest; 3. a cutter; 4. a limiting cylinder; 5. a limiting plate; 6. a traction oil cylinder; 7. a traction member; 8. an electro-permanent magnetic chuck; 9. the cutter fixes the guide rail; 10. a tool changing rack guide rail; 71. hanging blocks; 72. hanging a groove; 11. a lower body; 12. a jacking oil cylinder; 13. a drawbar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a tool changer structure in the prior art is disclosed, and a principle thereof is that when an upper die plate 4 is installed on an upper die base 2, the upper die plate 4 is in plug-in fit with a square bar 7 (namely, the square bar 7 is inserted into a through groove 9 on the upper surface of the upper die plate 4), then one locking upright rod 6 is rotated to enable the locking upright rod to pass through the square bar 7 and be screwed in an internal thread groove 10 of the upper die plate 4, then the rest locking upright rods 6 are rotated into the internal thread groove 10 of the upper die plate 4, so that the horizontal direction of the upper die plate 4 can be positioned, and finally, an L-shaped plate 12 is pulled upwards by an air cylinder 11 to clamp the upper die plate 4, so that the vertical. The method has the defects of difficult operation, multiple manual operation steps, low efficiency and the like.
Fig. 2 to fig. 6, a press tool changing device that this device provided, it is including fixing the tool changing frame 2 on last fuselage 1, it is connected with cutter 3 to slide on the tool changing frame 2, it installs spacing cylinder 4 on the fuselage 1 to go up, the piston rod end connection of spacing cylinder 4 has the limiting plate 5 that is used for restricting 3 strokes of sliding of cutter, it draws the cylinder body of hydro-cylinder 6 to be fixed with a plurality of on the fuselage 1 to go up, the piston rod tip of a plurality of draws the hydro-cylinder 6 is fixed with respectively and is used for articulating the piece 7 that draws that pulls 3 upwords of pulling cutter, it is used for adsorbing fixed electric permanent magnetic chuck 8 with the cutter to install a plurality of in the fuselage.
Fig. 2 to 6 show that the press tool changer has the advantages of high automation degree, less manual operation actions during tool changing, high tool changing efficiency and high tool changing safety when the tool changer is used for tool changing; can promote cutter 3 on tool changing frame 2 when carrying out the tool changing, make its limiting plate 5 with 4 end connection of spacing cylinder conflict spacingly, later can start the traction cylinder 6 on the fuselage 1 and drive and pull 7 with 3 lifts of cutter to appointed height, later utilize electric permanent magnet sucking disc 8 to carry out firm absorption fixedly.
Referring to fig. 2, 4 and 6, in order to improve the stability of the cutter 3 during cutter changing, the cutter 3 is fixed on a cutter fixing guide rail 9, a cutter changing frame guide rail 10 is arranged on the cutter changing frame 2, the cutter fixing guide rail 9 is horizontally connected on the cutter changing frame guide rail 10 in a sliding manner, the cutter 3 can be conveniently fixed by using the cutter fixing guide rail 9, and the cutter fixing guide rail 9 can be conveniently slid by using the cutter changing frame guide rail 10; wherein it is fixed through a plurality of bolted connection between cutter 3 and the cutter fixed guide 9, and tool changing frame guide rail 10 passes through a plurality of bolt fastening on last fuselage 1, utilizes the bolt can make things convenient for tool changing frame guide rail 10 and last fuselage 1 to fix, and it is fixed to utilize the bolt to make things convenient for being connected of cutter 3 and cutter fixed guide 9.
Referring to fig. 2 and 6, the traction member 7 includes a hanging block 71 and a hanging groove 72, the hanging block 71 is fixed at the end of the piston rod of the traction cylinder 6, the hanging groove 72 is formed on the cutter fixing guide rail 9 for the hanging block 71 to be clamped in, and when the hanging block 71 in the traction member 7 is clamped in the hanging groove 72, the cutter 3 can be conveniently lifted; the upper machine body 1 is connected above the lower machine body 11 in a sliding mode in the vertical direction, the lower machine body 11 is fixedly provided with the jacking oil cylinder 12, the end portion of a piston rod of the jacking oil cylinder 12 is fixedly connected with the upper machine body 1, and the upper machine body 1 can be jacked up by the aid of the jacking oil cylinder 12 fixed on the lower machine body 11, so that operation is convenient.
Referring to fig. 2, wherein a pressure sensor is fixed on the limiting plate 5, a controller is fixed on the upper machine body 1, the pressure sensor is electrically connected with a control input end of the controller, and a control output end of the controller is electrically connected with the traction cylinder 6 and the electric permanent magnetic chuck 8, when the pressure sensor senses that the cutter 3 collides with the limiting plate 5, the level change can be fed back to the controller, and the controller can obtain a signal, so as to control the traction cylinder 6 and the electric permanent magnetic chuck 8 to act.
Referring to fig. 2 to 6, a traction rod 13 is connected to the end of a piston rod of the traction cylinder 6 through a coupling, a traction member 7 for hitching and pulling the cutter 3 to move upwards is connected to the end of the traction rod 13, and the traction rod 13 connected through the coupling can facilitate the connection of the traction member 7; wherein the sideline punishment of cutter fixed guide 9 and tool changing rack guide rail 10 do not is provided with the fillet, and the setting of fillet can reduce stress concentration phenomenon to can prevent the fish tail.
Referring to fig. 2 to 6, a plurality of guide rods are fixed on the cutter fixing guide rail 9, and are respectively connected with the cutter changing frame guide rail 10 in a sliding manner, so that the guide rods can provide vertical guide for the cutter 3 in the lifting process; wherein, a bearing 14 is arranged at the end part of the piston rod of the traction oil cylinder 6, and the arrangement of the bearing 14 can improve the stability when the cutter 3 is dragged and can reduce the corresponding impact.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a press tool changing device, is including fixing tool changing frame (2) on last fuselage (1), its characterized in that: it has cutter (3) to slide on tool changing rack (2), go up and install spacing cylinder (4) on fuselage (1), the piston rod end connection of spacing cylinder (4) has and is used for the restriction limiting plate (5) of the stroke that slides cutter (3), go up and be fixed with the cylinder body that a plurality of pull hydro-cylinder (6), a plurality of on fuselage (1) the piston rod tip of pulling hydro-cylinder (6) is fixed with respectively and is used for articulating the pulling traction piece (7) that go upward cutter (3), it is used for with to go up to install a plurality of in fuselage (1) cutter (3) adsorbs fixed electric permanent magnet sucking disc (8).
2. Press tool changer according to claim 1, characterized in that: the cutter (3) is fixed on the cutter fixed guide rail (9), a cutter changing frame guide rail (10) is arranged on the cutter changing frame (2), and the cutter fixed guide rail (9) is horizontally connected on the cutter changing frame guide rail (10) in a sliding mode.
3. Press tool changer according to claim 2, characterized in that: the cutter (3) is fixedly connected with the cutter fixing guide rail (9) through a plurality of bolts, and the cutter changing frame guide rail (10) is fixed on the upper machine body (1) through a plurality of bolts.
4. A press tool changer as claimed in claim 3, characterized in that: the traction piece (7) comprises a hanging block (71) and a hanging groove (72), the hanging block (71) is fixed at the end part of a piston rod of the traction oil cylinder (6), and the hanging groove (72) is formed in the cutter fixed guide rail (9) for the hanging block (71) to be clamped in.
5. Press tool changer according to claim 1, characterized in that: go up fuselage (1) and slide along vertical direction and connect fuselage (11) top down, be fixed with on fuselage (11) down and move hydro-cylinder (12), the piston rod tip that moves hydro-cylinder (12) with go up fuselage (1) and be connected fixedly.
6. Press tool changer according to claim 1, characterized in that: the electric permanent magnetic suction disc type tractor is characterized in that a pressure sensor is fixed on the limiting plate (5), a controller is fixed on the upper machine body (1), the pressure sensor is electrically connected with a control input end of the controller, and a control output end of the controller is electrically connected with the traction oil cylinder (6) and the electric permanent magnetic suction disc (8).
7. Press tool changer according to claim 1, characterized in that: the end part of a piston rod of the traction oil cylinder (6) is connected with a traction rod (13) through a coupler, and the end part of the traction rod (13) is connected with a traction piece (7) which is used for hanging and pulling the cutter (3) to move upwards.
8. Press tool changer according to claim 2, characterized in that: and the sidelines of the cutter fixing guide rail (9) and the cutter changing frame guide rail (10) are respectively provided with a fillet.
9. Press tool changer according to claim 2, characterized in that: a plurality of guide rods are fixed on the cutter fixing guide rail (9), and the guide rods are connected with the cutter changing frame guide rail (10) in a sliding mode respectively.
10. Press tool changer according to claim 1, characterized in that: and a bearing (14) is arranged at the end part of a piston rod of the traction oil cylinder (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110302687.4A CN112872873A (en) | 2021-03-22 | 2021-03-22 | Press tool changing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110302687.4A CN112872873A (en) | 2021-03-22 | 2021-03-22 | Press tool changing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112872873A true CN112872873A (en) | 2021-06-01 |
Family
ID=76041639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110302687.4A Pending CN112872873A (en) | 2021-03-22 | 2021-03-22 | Press tool changing device |
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| Country | Link |
|---|---|
| CN (1) | CN112872873A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333866A (en) * | 2021-06-21 | 2021-09-03 | 许碧环 | Numerical control metal cutting machine tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5827159A (en) * | 1996-05-15 | 1998-10-27 | Adachi; Hiroshi | Combination tool changer and storage device for die cutter |
| JPH11138500A (en) * | 1997-11-14 | 1999-05-25 | Wacoal Corp | Press cutting machine and cutting edge die |
| CN106734503A (en) * | 2016-11-25 | 2017-05-31 | 盐城市华森机械有限公司 | Automatic tool changer pattern abnormity material clicker press machine |
| CN106926316A (en) * | 2017-04-10 | 2017-07-07 | 盐城市华森机械有限公司 | A kind of sheet material cuts efficient guillotine |
| CN207656805U (en) * | 2017-12-05 | 2018-07-27 | 劲亚（上海）机械有限公司 | A kind of tool changing device of flat-press flat-die cutting machine |
| CN214770655U (en) * | 2021-03-22 | 2021-11-19 | 无锡前洲兴华机械有限公司 | Press tool changing device |
-
2021
- 2021-03-22 CN CN202110302687.4A patent/CN112872873A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5827159A (en) * | 1996-05-15 | 1998-10-27 | Adachi; Hiroshi | Combination tool changer and storage device for die cutter |
| JPH11138500A (en) * | 1997-11-14 | 1999-05-25 | Wacoal Corp | Press cutting machine and cutting edge die |
| CN106734503A (en) * | 2016-11-25 | 2017-05-31 | 盐城市华森机械有限公司 | Automatic tool changer pattern abnormity material clicker press machine |
| CN106926316A (en) * | 2017-04-10 | 2017-07-07 | 盐城市华森机械有限公司 | A kind of sheet material cuts efficient guillotine |
| CN207656805U (en) * | 2017-12-05 | 2018-07-27 | 劲亚（上海）机械有限公司 | A kind of tool changing device of flat-press flat-die cutting machine |
| CN214770655U (en) * | 2021-03-22 | 2021-11-19 | 无锡前洲兴华机械有限公司 | Press tool changing device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333866A (en) * | 2021-06-21 | 2021-09-03 | 许碧环 | Numerical control metal cutting machine tool |
| CN113333866B (en) * | 2021-06-21 | 2022-12-27 | 广东艾普升智能装备有限公司 | Numerical control metal cutting machine tool |
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