CN106825524A - A kind of automatic cutting machine with saw and its processing method for cutting Flat bottom container dead head - Google Patents

A kind of automatic cutting machine with saw and its processing method for cutting Flat bottom container dead head Download PDF

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Publication number
CN106825524A
CN106825524A CN201710207772.6A CN201710207772A CN106825524A CN 106825524 A CN106825524 A CN 106825524A CN 201710207772 A CN201710207772 A CN 201710207772A CN 106825524 A CN106825524 A CN 106825524A
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China
Prior art keywords
cutting
bottom container
flat bottom
band
bands
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CN201710207772.6A
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CN106825524B (en
Inventor
何荣华
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Xiamen Tianzheng Industry And Trade Co ltd
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Xiamen University Tan Kah Kee College
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00Cutting-off surplus material, e.g. gates; Cleaning and working on castings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Abstract

The present invention relates to a kind of automatic cutting machine with saw and its processing method for cutting Flat bottom container dead head, the lathe includes transport part, cutting part and drives the hold-down mechanism of transmission, transport part middle setting gathering sill;Cutting part includes the cutting working platform moved forward and backward along transmission direction, and cutting working platform middle setting gathering sill, the gathering sill of transport part communicates with the gathering sill of cutting working platform, is used to accommodate Flat bottom container dead head;The hold-down mechanism of transmission is driven to be arranged on transmission platform face with cutting working platform top, including translation mechanism, telescoping mechanism and compression flat board, translation mechanism includes translational block, the translational block left and right sides is set on optical axis, two optical axises be arranged in parallel, translational block bottom surface connects telescoping mechanism, the connection of telescoping mechanism end compresses flat board, compress flat board and the inner bottom surface for conforming to Flat bottom container is pushed by telescoping mechanism drive, drive mechanism drives translational block to be translated along optical axis and then driven and compresses flat board translation, and the translation for compressing flat board drives Flat bottom container to realize translation.The present invention can not only realize the surface trimming of Flat bottom container dead head, and simple and ingenious structure, low cost, be conducive to ensureing safety of workers.

Description

A kind of automatic cutting machine with saw and its processing for cutting Flat bottom container dead head Method
Technical field
The present invention relates to a kind of automatic cutting machine with saw and its processing method for cutting Flat bottom container dead head.
Background technology
In life, casting technique is more and more ripe, and during various casting are produced, casting inevitably pour by presence The phenomenon of rising head, enterprise is that dead head is tentatively cut with vertical band sawing machine to the handling process of dead head, after cutting Workpiece carries out other machinings again.For the cutting of Flat bottom container dead head, due to not being fixed easily for Workpiece structure, it is difficult to real Existing automatic production line, it is general using artificial fixed workpiece, and because saw blade of band saw exposed parts are relatively more, workman is using During danger than larger;Vertical band sawing machine belongs to side force cutting, accepts uneven, and workman easily breaks away, and bands for band is easy Hurt workman's arm;Hommization control effect can not be played, poor universality is dangerous higher, and low production efficiency.
The content of the invention
The present invention makes improvement for the problem that above-mentioned prior art is present, i.e., the technical problems to be solved by the invention are A kind of automatic cutting machine with saw and its processing method for cutting Flat bottom container dead head is provided, can not only be realized flat The surface trimming of container dead head, and simple and ingenious structure, occur with accident prevention.
In order to solve the above-mentioned technical problem, the technical scheme is that:It is a kind of for cutting Flat bottom container dead head Automatic cutting machine with saw includes transport part, cutting part and drives the hold-down mechanism of transmission, and transport part includes left side conveyer belt, the right side Side conveyer belt and the gathering sill positioned at centre, left side conveyer belt and right side conveyer belt are constituted by the roller be arrangeding in parallel, left side The transfer surface of conveyer belt and right side conveyer belt collectively forms transmission platform face, and left side conveyer belt transmits the gap of interband with right side Regulation realizes being oriented to the regulation of well width;Cutting part includes the cutting working platform moved forward and backward along transmission direction and moves up and down Bands for band, the flat surface of cutting working platform and transmission platform face are located at same level, cutting working platform middle setting gathering sill, The gathering sill of transport part is communicated with the gathering sill of cutting working platform, is used to accommodate Flat bottom container dead head;Drive the pressure of transmission Tight mechanism is arranged on transmission platform face and cutting working platform top, including translation mechanism, telescoping mechanism and compression flat board, translates machine Structure includes translational block and the drive mechanism being connected with translational block, and the translational block left and right sides is set on optical axis, and two optical axises are parallel Set, translational block bottom surface connection telescoping mechanism, the connection of telescoping mechanism end compresses flat board, under compression flat board is driven by telescoping mechanism The inner bottom surface for being bonded to Flat bottom container is overlayed, drive mechanism drives translational block to be translated along optical axis and then driven and compresses flat board translation, pressure The translation of tight flat board drives Flat bottom container to realize translation;Telescoping mechanism include be connected to translational block lower surface center telescoping cylinder and Two parallelogram connection-rods of translational block lower surface are hinged on, the expansion link end of telescoping cylinder connects a horizontal cross bar, level The end of cross bar two is all connected with a reverse V-shaped connecting rod, horizontal cross bar and the summit that the tie point of reverse V-shaped connecting rod is reverse V-shaped connecting rod, and two fall V-type connecting rod is parallel to each other and relative telescopic bar is symmetrical, and two ends of reverse V-shaped connecting rod are connected to the surface for compressing flat board, and parallel The relative pin joint of pin joint that quadrilateral connecting rod is arranged in translational block is arranged on the end of horizontal cross bar, positioned at horizontal cross bar It is in same perpendicular with the parallelogram connection-rod and reverse V-shaped connecting rod of one end.
Further, translation mechanism also includes being located at the internal thread of two screw mandrels being oriented between optical axis, screw mandrel and translational block Coordinate, screw mandrel is driven by feeding motor.
Further, translation mechanism also includes being located at two expansion links being oriented between optical axis, and expansion link is fixedly connected on flat Move on block, expansion link is driven by hydraulic pressure or air pressure.
Further, cutting part also includes base, the tensioning wheel being arranged on the left of base top and is arranged on base top The driving wheel on right side, bands for band sets bands for band tensioning governor motion on tensioning wheel and driving wheel above tensioning wheel, Base sidepiece driving wheel lower section is provided with a main motor, and main motor transmits power and drives drive by vee-belt and v-shaped pulley Driving wheel rotates, and tensioning wheel and driving wheel outside are respectively arranged with protective cover, in cutting working platform right front, bands for band cut coverage peripheral hardware Put console.
Further, bands for band lifting handwheel is set in base bottom, realizes lifting for adjusting band using screw structure Saw blade is highly;Or bands for band hoist cylinder or bands for band lift cylinder are set in base bottom, for adjusting bands for band highly.
Further, cutting working platform side sets cutting working platform movement handwheel, and hand is realized using elevating screw structure It is dynamic to adjust the movable of cutting working platform.
Further, drums inside sets roller bearing, and roller bearing is supported on support by bearing, drives the hold-down mechanism of transmission Support top is arranged on by column.
Further, side face is provided with bracket fixing device, and bracket fixing device is included more with connecting shaft, for solid The fixed rack left and right sides.
Further, support lower section sets cooling water tank at cutting part, by pump the coolant in cooling water tank Extraction is cooled down to bands for band, and used coolant flows into the coolant return tank below bands for band, then by coolant Released again after strainer filtering in return tank water-guiding hole recycling.
The processing method of the lathe is as follows, the width of the dead head size adjusting gathering sill according to Flat bottom container, will be flat The dead head of container is placed in gathering sill forward, and the horizontal bottom of Flat bottom container is placed on transport part by middle roller, controlling The expansion link tight flat board of elongated dynamic pressure of telescoping cylinder processed pushes the inner bottom surface for conforming to Flat bottom container, controls translational block to put down afterwards Move, and then drive compression flat board translation, the translation for compressing flat board drives Flat bottom container to realize transmitting, and moves to Flat bottom container and cuts Bands for band lower section on workbench is cut, stops translation;Dead head size according to Flat bottom container adjusts the height of bands for band, according to institute The front and back position of the dead head length adjustment cutting working platform of the Flat bottom container that need to be cut, control bands for band feeding is cut, After the completion of cutting, Flat bottom container by transport part can be transmitted back to home position as needed or transmitted to subsequent processing.
Compared with prior art, the invention has the advantages that:According to the design feature and dead head of Flat bottom container Presence, shaping-orientation groove to accommodate dead head, above transport part and cutting working platform set translation mechanism, telescoping mechanism and Flat board is compressed, transmission and the compression of Flat bottom container is realized, compressing flat board can not only realize the compression positioning of Flat bottom container, and it fits In the inner surface of Flat bottom container, the madial wall of Flat bottom container is resisted against when either compression, or its movement is caused It is resisted against the madial wall of Flat bottom container, can drive the translation of Flat bottom container, realizes the surface trimming of Flat bottom container dead head; The design of telescoping mechanism ensure that the steady lifting for compressing flat board;Be oriented to the adjustable of well width, bands for band height it is adjustable, The movable range of work for expanding equipment of cutting working platform, and simple and ingenious structure, occur with accident prevention.
Brief description of the drawings
Fig. 1 is embodiment of the present invention construction stereogram;
Fig. 2 is embodiment of the present invention construction front view;
Fig. 3 is embodiment of the present invention construction top view;
Fig. 4 is embodiment of the present invention construction left view;
Fig. 5 is embodiment of the present invention construction right view;
Fig. 6 is embodiment of the present invention construction rearview.
In figure:1- bases, 2- consoles, 3- bands for bands lifting handwheel, 4- bands for bands, 5- driving wheels, 6- main motors, 7- Bearing up pulley, 8- bands for bands tensioning governor motion, 9- cutting working platforms, 10- feedings motor, 11- are oriented to optical axis, 12- guide pads, 13- Screw mandrel, 14- compress flat board, 15- cooling water tanks, 16- roller bearings, 17- rollers, 18- columns, 19- bracket fixing devices, 20- supports, 21-V shapes belt pulley, 22-V shapes band, 23- filter screens, 24- cutting working platforms movement handwheel, 25- protective covers, 26- elevating screws.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
As illustrated, a kind of automatic cutting machine with saw for cutting Flat bottom container dead head includes transport part, cutting Portion and the hold-down mechanism of driving transmission, transport part include left side conveyer belt, right side conveyer belt and positioned at middle gathering sill, left side Conveyer belt and right side conveyer belt are constituted by the roller be arrangeding in parallel, and the transfer surface of left side conveyer belt and right side conveyer belt is common Transmission platform face is constituted, left side conveyer belt realizes being oriented to the regulation of well width with the gap adjustment of right side transmission interband;Cutting part Including the cutting working platform moved forward and backward along transmission direction and the bands for band for moving up and down, flat surface and the transmission of cutting working platform Flat surface is located at same level, cutting working platform middle setting gathering sill, the gathering sill of transport part and leading for cutting working platform Communicated to groove, be used to accommodate Flat bottom container dead head;The hold-down mechanism of transmission is driven to be arranged on transmission platform face with cutting work Make platform top, including translation mechanism, telescoping mechanism and compress flat board, translation mechanism includes translational block and is connected with translational block Drive mechanism, the translational block left and right sides is set on optical axis, and two optical axises be arranged in parallel, translational block bottom surface connection telescoping mechanism, is stretched The connection of contracting mechanism end compresses flat board, compresses flat board and pushes the inner bottom surface for conforming to Flat bottom container by telescoping mechanism drive, drives Mechanism drives translational block to be translated along optical axis and then drives compression flat board to translate, and the translation for compressing flat board drives Flat bottom container to realize putting down Move;Telescoping mechanism includes the telescoping cylinder for being connected to translational block lower surface center and be hinged on translational block lower surface two parallel four Side shape connecting rod, the expansion link end of telescoping cylinder connects a horizontal cross bar, and the end of horizontal cross bar two is all connected with a reverse V-shaped connecting rod, water Flat cross bar and the summit that the tie point of reverse V-shaped connecting rod is reverse V-shaped connecting rod, two reverse V-shaped connecting rods are parallel to each other and relative telescopic bar pair Claim, two ends of reverse V-shaped connecting rod are connected to the surface for compressing flat board, and being hinged in translational block is arranged on parallelogram connection-rod The relative pin joint of point is arranged on the end of horizontal cross bar, positioned at horizontal cross bar with one end parallelogram connection-rod with it is reverse V-shaped Connecting rod is in same perpendicular.
Further, translation mechanism also includes being located at the internal thread of two screw mandrels being oriented between optical axis, screw mandrel and translational block Coordinate, screw mandrel is driven by feeding motor.
Further, translation mechanism also includes being located at two expansion links being oriented between optical axis, and expansion link is fixedly connected on flat Move on block, expansion link is driven by hydraulic pressure or air pressure.
Further, cutting part also includes base, the tensioning wheel being arranged on the left of base top and is arranged on base top The driving wheel on right side, bands for band sets bands for band tensioning governor motion on tensioning wheel and driving wheel above tensioning wheel, Base sidepiece driving wheel lower section is provided with a main motor, and main motor transmits power and drives drive by vee-belt and v-shaped pulley Driving wheel rotates, and tensioning wheel and driving wheel outside are respectively arranged with protective cover, in cutting working platform right front, bands for band cut coverage peripheral hardware Put console.
Further, bands for band lifting handwheel is set in base bottom, realizes lifting for adjusting using elevating screw structure Section bands for band is highly;Or bands for band hoist cylinder or bands for band lift cylinder are set in base bottom, for adjusting bands for band Highly.
Further, cutting working platform side sets cutting working platform movement handwheel, realizes adjusting manually using screw structure Save the movable of cutting working platform.
Further, drums inside sets roller bearing, and roller bearing is supported on support by bearing, drives the hold-down mechanism of transmission Support top is arranged on by column.
Further, side face is provided with bracket fixing device, and bracket fixing device is included more with connecting shaft, for solid The fixed rack left and right sides.
Further, support lower section sets cooling water tank at cutting part, by pump the coolant in cooling water tank Extraction is cooled down to bands for band, and used coolant flows into the coolant return tank below bands for band, then by coolant Released again after strainer filtering in return tank water-guiding hole recycling.
The processing method of the lathe is as follows, the width of the dead head size adjusting gathering sill according to Flat bottom container, will be flat The dead head of container is placed in gathering sill forward, and the horizontal bottom of Flat bottom container is placed on transport part by middle roller, controlling The expansion link tight flat board of elongated dynamic pressure of telescoping cylinder processed pushes the inner bottom surface for conforming to Flat bottom container, controls translational block to put down afterwards Move, and then drive compression flat board translation, the translation for compressing flat board drives Flat bottom container to realize transmitting, and moves to Flat bottom container and cuts Bands for band lower section on workbench is cut, stops translation;Dead head size according to Flat bottom container adjusts the height of bands for band, according to institute The front and back position of the dead head length adjustment cutting working platform of the Flat bottom container that need to be cut, control bands for band feeding is cut, After the completion of cutting, Flat bottom container by transport part can be transmitted back to home position as needed or transmitted to subsequent processing.
Being oriented to the adjustment of well width can transmit the gap of interband by adjusting left and right, and then card article is arranged on support both sides So that left and right transmission belt is positioned.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with Modification, should all belong to covering scope of the invention.

Claims (10)

1. a kind of automatic cutting machine with saw for cutting Flat bottom container dead head, it is characterised in that:Including transport part, cutting Portion and the hold-down mechanism of driving transmission, transport part include left side conveyer belt, right side conveyer belt and positioned at middle gathering sill, left side Conveyer belt and right side conveyer belt are constituted by the roller be arrangeding in parallel, and the transfer surface of left side conveyer belt and right side conveyer belt is common Transmission platform face is constituted, left side conveyer belt realizes being oriented to the regulation of well width with the gap adjustment of right side transmission interband;Cutting part Including the cutting working platform moved forward and backward along transmission direction and the bands for band for moving up and down, flat surface and the transmission of cutting working platform Flat surface is located at same level, cutting working platform middle setting gathering sill, the gathering sill of transport part and leading for cutting working platform Communicated to groove, be used to accommodate Flat bottom container dead head;The hold-down mechanism of transmission is driven to be arranged on transmission platform face with cutting work Make platform top, including translation mechanism, telescoping mechanism and compress flat board, translation mechanism includes translational block and is connected with translational block Drive mechanism, the translational block left and right sides is set on optical axis, and two optical axises be arranged in parallel, translational block bottom surface connection telescoping mechanism, is stretched The connection of contracting mechanism end compresses flat board, compresses flat board and pushes the inner bottom surface for conforming to Flat bottom container by telescoping mechanism drive, drives Mechanism drives translational block to be translated along optical axis and then drives compression flat board to translate, and the translation for compressing flat board drives Flat bottom container to realize putting down Move;Telescoping mechanism includes the telescoping cylinder for being connected to translational block lower surface center and be hinged on translational block lower surface two parallel four Side shape connecting rod, the expansion link end of telescoping cylinder connects a horizontal cross bar, and the end of horizontal cross bar two is all connected with a reverse V-shaped connecting rod, water Flat cross bar and the summit that the tie point of reverse V-shaped connecting rod is reverse V-shaped connecting rod, two reverse V-shaped connecting rods are parallel to each other and relative telescopic bar pair Claim, two ends of reverse V-shaped connecting rod are connected to the surface for compressing flat board, and being hinged in translational block is arranged on parallelogram connection-rod The relative pin joint of point is arranged on the end of horizontal cross bar, positioned at horizontal cross bar with one end parallelogram connection-rod with it is reverse V-shaped Connecting rod is in same perpendicular.
2. a kind of automatic cutting machine with saw for cutting Flat bottom container dead head according to claim 1, its feature It is:Translation mechanism also includes being located at the screw-internal thread fit of two screw mandrels being oriented between optical axis, screw mandrel and translational block, and screw mandrel is by entering Driven to motor.
3. a kind of automatic cutting machine with saw for cutting Flat bottom container dead head according to claim 1, its feature It is:Translation mechanism also includes being located at two expansion links being oriented between optical axis, and expansion link is fixedly connected in translational block, expansion link Driven by hydraulic pressure or air pressure.
4. according to a kind of automatic cutting machine with saw for cutting Flat bottom container dead head that one of claim 1-3 is described, It is characterized in that:Cutting part also includes base, the tensioning wheel being arranged on the left of base top and is arranged on the right side of base top Driving wheel, bands for band sets bands for band tensioning governor motion, in base side on tensioning wheel and driving wheel above tensioning wheel Portion driving wheel lower section is provided with a main motor, and main motor transmits power and drives driving wheel to revolve by vee-belt and v-shaped pulley Turn, tensioning wheel and driving wheel outside are respectively arranged with protective cover, and control is set outside cutting working platform right front, bands for band cut coverage Platform.
5. a kind of automatic cutting machine with saw for cutting Flat bottom container dead head according to claim 4, its feature It is:Bands for band lifting handwheel is set in base bottom, realizes lifting for adjusting bands for band highly using screw structure;Or Bands for band hoist cylinder or bands for band lift cylinder are set in base bottom, for adjusting bands for band highly.
6. according to a kind of automatic cutting machine with saw for cutting Flat bottom container dead head that one of claim 1-3 is described, It is characterized in that:Cutting working platform side sets cutting working platform movement handwheel, and regulation manually is realized using elevating screw structure Cutting working platform it is movable.
7. according to a kind of automatic cutting machine with saw for cutting Flat bottom container dead head that one of claim 1-3 is described, It is characterized in that:Drums inside sets roller bearing, and roller bearing is supported on support by bearing, drives the hold-down mechanism of transmission by vertical Post is arranged on support top.
8. a kind of automatic cutting machine with saw for cutting Flat bottom container dead head according to claim 7, its feature It is:Side face is provided with bracket fixing device, and bracket fixing device is included more with connecting shaft, for fixed support or so two Side.
9. according to a kind of automatic cutting machine with saw for cutting Flat bottom container dead head that one of claim 1-3 is described, It is characterized in that:Support lower section sets cooling water tank at cutting part, and the coolant in cooling water tank is extracted out right by pump Bands for band is cooled down, and used coolant flows into the coolant return tank below bands for band, then by coolant return tank Released again after strainer filtering in water-guiding hole recycling.
10. according to a kind of automatic cutting machine with saw for cutting Flat bottom container dead head that one of claim 1-9 is described Processing method, it is characterised in that:The width of the dead head size adjusting gathering sill according to Flat bottom container, by pouring for Flat bottom container Rising head is placed in gathering sill forward, and the horizontal bottom of Flat bottom container is placed on transport part by middle roller, controlling telescoping cylinder The expansion link tight flat board of elongated dynamic pressure push the inner bottom surface for conforming to Flat bottom container, translational block translation, and then band are controlled afterwards The tight flat board translation of dynamic pressure, the translation for compressing flat board drives Flat bottom container to realize transmission, Flat bottom container is moved to cutting working platform Upper bands for band lower section, stops translation;Dead head size according to Flat bottom container adjusts the height of bands for band, according to required cutting The front and back position of the dead head length adjustment cutting working platform of Flat bottom container, control bands for band feeding is cut, and cutting is completed Afterwards, Flat bottom container by transport part can be transmitted back to home position as needed or is transmitted to subsequent processing.
CN201710207772.6A 2017-03-31 2017-03-31 It is a kind of for cutting the automatic cutting machine with saw and its processing method of Flat bottom container dead head Active CN106825524B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111872701A (en) * 2020-06-19 2020-11-03 芜湖仅一机械有限公司 Automatic cooling and gate removing production line of battery fixing support

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0919724A (en) * 1995-07-06 1997-01-21 Hitachi Metals Ltd Press system cutting tool and cutting method of casting part using the same
JP3547674B2 (en) * 1999-12-22 2004-07-28 有限会社スグロ鉄工 Deburring device for molded products
CN202062126U (en) * 2011-04-19 2011-12-07 福州钜全汽车配件有限公司 Piston blank riser cutting device
CN202845933U (en) * 2012-10-19 2013-04-03 石家庄博思特非标设备制造有限公司 Automatic milling machine used for piston casting head
CN202845936U (en) * 2012-10-19 2013-04-03 石家庄博思特非标设备制造有限公司 Automatic cutting sawing machine used for piston casting head
CN203061856U (en) * 2013-01-14 2013-07-17 翔德(福州)精密机械有限公司 Piston insulated feeder automatic sawing machine
CN205342076U (en) * 2015-11-26 2016-06-29 崔明生 Tire mould rising head sawing machine
CN206717012U (en) * 2017-03-31 2017-12-08 厦门大学嘉庚学院 A kind of automatic cutting machine with saw for being used to cut Flat bottom container dead head

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0919724A (en) * 1995-07-06 1997-01-21 Hitachi Metals Ltd Press system cutting tool and cutting method of casting part using the same
JP3547674B2 (en) * 1999-12-22 2004-07-28 有限会社スグロ鉄工 Deburring device for molded products
CN202062126U (en) * 2011-04-19 2011-12-07 福州钜全汽车配件有限公司 Piston blank riser cutting device
CN202845933U (en) * 2012-10-19 2013-04-03 石家庄博思特非标设备制造有限公司 Automatic milling machine used for piston casting head
CN202845936U (en) * 2012-10-19 2013-04-03 石家庄博思特非标设备制造有限公司 Automatic cutting sawing machine used for piston casting head
CN203061856U (en) * 2013-01-14 2013-07-17 翔德(福州)精密机械有限公司 Piston insulated feeder automatic sawing machine
CN205342076U (en) * 2015-11-26 2016-06-29 崔明生 Tire mould rising head sawing machine
CN206717012U (en) * 2017-03-31 2017-12-08 厦门大学嘉庚学院 A kind of automatic cutting machine with saw for being used to cut Flat bottom container dead head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111872701A (en) * 2020-06-19 2020-11-03 芜湖仅一机械有限公司 Automatic cooling and gate removing production line of battery fixing support

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Address before: 363105 Zhangzhou campus of Xiamen University

Patentee before: XIAMEN UNIVERSITY TAN KAH KEE College