CN115870559A - Finish machining tool for cam groove - Google Patents

Finish machining tool for cam groove Download PDF

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Publication number
CN115870559A
CN115870559A CN202211564375.1A CN202211564375A CN115870559A CN 115870559 A CN115870559 A CN 115870559A CN 202211564375 A CN202211564375 A CN 202211564375A CN 115870559 A CN115870559 A CN 115870559A
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CN
China
Prior art keywords
rotating ring
rack
wall
cam groove
base
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.)
Pending
Application number
CN202211564375.1A
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Chinese (zh)
Inventor
毛海堂
杨守良
任继勇
李珍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Binzhou Lude Crankshaft Co ltd
Original Assignee
Binzhou Lude Crankshaft Co ltd
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 Binzhou Lude Crankshaft Co ltd filed Critical Binzhou Lude Crankshaft Co ltd
Priority to CN202211564375.1A priority Critical patent/CN115870559A/en
Publication of CN115870559A publication Critical patent/CN115870559A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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Abstract

The invention discloses a cam groove finish machining tool, which relates to the field of cam groove machining and comprises a base, wherein an upper frame is installed at the top end of the base, a driving motor is installed on the inner side of the upper frame through an installation support, a working platform is installed on the inner side of the upper frame below the driving motor, a triangular claw disc and an adjusting mechanism arranged in the base are rotatably connected to the inner wall of the working platform; the adjusting mechanism comprises a main motor and an air cylinder which are arranged in the base, and the main motor is positioned below the air cylinder. The invention can adjust the diameters of two ends of the transmission belt by arranging the adjusting structure and the transmission mechanism, so that the diameters of the upper end and the lower end of the transmission belt are in a large state and a small state, and the first rotating ring, the second rotating ring, the third rotating ring and the fourth rotating ring which are connected with the transmission belt do acceleration motion or deceleration motion, thereby adjusting the rotating speed of materials.

Description

Finish machining tool for cam groove
Technical Field
The invention relates to the field of cam groove machining, in particular to a cam groove finish machining tool.
Background
A cam refers to a mechanical rotary or sliding member (such as a wheel or a projecting part of a wheel) which transmits the motion to a roller moving against its edge or to a needle bar moving freely on a grooved surface, or which withstands the forces from such a roller and a needle bar, a "tooling" in the field of mechanical production, i.e. production process equipment: refers to the collective term for the various tools used in the manufacturing process.
The existing cam groove is machined through a tool, materials such as cylinders are generally fixed at a preset position, a rotary cutter is arranged above the materials, the materials are moved back and forth synchronously in the process of rotating the materials, the materials are in contact with the cutter, and therefore a required cam groove is formed, the distance length of the cam groove is determined by the rotating speed of the materials, namely the rotating speed of a driving unit, the gear selection of the rotating speed of the existing driving unit is limited, and therefore in order to machine cam grooves with different lengths, the invention provides a cam groove finish machining tool.
Disclosure of Invention
The invention aims to: in order to solve the limited problem of being not convenient for process out the cam groove of multiple difference of present drive unit slew velocity fender position selection, provide a cam groove finish machining frock.
In order to achieve the purpose, the invention provides the following technical scheme: a cam groove finish machining tool comprises a base, wherein an upper frame is installed at the top end of the base, a driving motor is installed on the inner side of the upper frame through an installation support, a working platform is installed on the inner side of the upper frame and located below the driving motor, a triangular claw disc and an adjusting mechanism arranged inside the base are rotatably connected to the inner wall of the working platform;
the adjusting mechanism comprises a main motor and an air cylinder which are arranged in the base, the main motor is positioned below the air cylinder, the output end of the main motor is connected with a first rotating ring, and one end of the first rotating ring is sleeved with a second rotating ring;
the outer walls of the second rotating ring and the first rotating ring are sleeved with a transmission belt, the inner side of the other end of the transmission belt is provided with a third rotating ring and a fourth rotating ring in a fit mode, and the third rotating ring and the fourth rotating ring are sleeved with each other;
a first rack is arranged on the outer wall of one end of the second rotating ring, a first straight gear is meshed with the top end of the first rack, a second rack is meshed with the top end of the first straight gear, and the outer wall of the second rack is fixedly connected with the output end of the air cylinder;
the transmission mechanism is arranged inside the third rotating ring and the fourth rotating ring and fixed on the outer wall of the first rack, the transmission mechanism comprises a fourth rack fixed on the inner wall of the third rotating ring, the inner wall of the fourth rotating ring is provided with a third rack extending to the inside of the third rotating ring, a second straight gear rotatably connected with the inner wall of the third rotating ring is meshed between the third rack and the fourth rack, and the outer wall of the first rack is provided with a positioning block extending to the inner wall of the second rotating ring.
As a still further scheme of the invention: the adjusting mechanism is characterized by further comprising a reciprocating screw rod sleeved at one end of a second rotating ring, the outer wall of the reciprocating screw rod is incidentally sleeved with a positioning rod through a crescent, the top end of the positioning rod is fixedly connected with the bottom end of the working platform, a loop bar is sleeved at one end of a third rotating ring, and one end of the loop bar penetrates through the working platform and the triangular claw disc to be fixedly connected.
As a still further scheme of the invention: a first transverse sliding groove matched with transverse moving tracks of the first rack and the second rack is formed in the base, and the first straight gear is rotatably connected with the inner wall of the base.
As a still further scheme of the invention: the outer walls of the first rack and the second rack are of L-shaped structures, and a second transverse sliding groove matched with the transverse moving track of the positioning rod is formed in the inner wall of the base.
As a still further scheme of the invention: the outer wall of drive belt is the inclined plane attitude, the outer wall of first rotating ring, second rotating ring, third rotating ring, fourth rotating ring all is the inclined plane attitude, and laminates with the outer wall of drive belt.
As a still further scheme of the invention: the number of the positioning blocks is two, and the two positioning blocks are uniformly distributed on the outer walls of one ends of the first rack and the second rack.
As a still further scheme of the invention: and the outer walls of the second rotating ring and the third rotating ring are provided with rotating grooves matched with the rotating track of the positioning block.
As a still further scheme of the invention: the number of the third rack, the fourth rack and the second straight gear is two, the third rack, the fourth rack and the second straight gear are uniformly distributed in the third rotating ring, the fourth rotating ring, the first rotating ring and the second rotating ring, and a movable groove matched with the entering track of the third rack is formed in the inner wall of the fourth rotating ring.
As a still further scheme of the invention: the utility model discloses a multi-thread rod's structure, including first rotating ring, second rotating ring, outer wall fixedly connected with lug, the inner wall of fourth rotating ring is provided with the constant head tank with lug outer wall assorted, loop bar and third rotating ring, second rotating ring and toward the junction of multi-filament rod with the same processing, driving motor's output is connected with the cutter, driving motor's top is connected with the electric putter that top driving motor removed.
Compared with the prior art, the invention has the beneficial effects that:
through setting up regulation structure, drive mechanism, can adjust the diameter at drive belt both ends, both ends diameter is in the state of one big one little about making the drive belt, makes first rotating ring, second rotating ring and third rotating ring, the fourth rotating ring be the speed-raising motion or the speed-lowering motion of being connected with the drive belt to adjust the slew velocity of material, according to the rotational speed difference, can set up the cam groove of different length to the material.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the base of the present invention;
FIG. 3 is a schematic of the drive belt configuration of the present invention;
FIG. 4 is an enlarged view of a portion of the present invention at A;
FIG. 5 is a schematic view of the right side of the first rotating ring of the present invention;
fig. 6 is a schematic view of the left side structure of the first rotating ring of the present invention.
In the figure: 1. a base; 2. an upper frame; 3. a drive motor; 4. a working platform; 5. a triangular claw disk; 6. an adjustment mechanism; 601. a main motor; 602. a first rotating ring; 603. a second rotating ring; 604. a reciprocating screw rod; 605. positioning a rod; 606. a first rack; 607. a transmission belt; 608. a third rotating ring; 609. a fourth rotating ring; 610. a second rack; 611. a first straight gear; 612. a cylinder; 613. a loop bar; 7. a transmission mechanism; 701. a third rack; 702. a fourth rack; 703. a second spur gear; 704. and (5) positioning the blocks.
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 to 6, in an embodiment of the present invention, a cam groove finish machining tool includes a base 1, an upper frame 2 is installed at a top end of the base 1, a driving motor 3 is installed on an inner side of the upper frame 2 through an installation support, a working platform 4 is installed on an inner side of the upper frame 2 below the driving motor 3, a triangular claw disc 5 and an adjusting mechanism 6 arranged inside the base 1 are rotatably connected to an inner wall of the working platform 4;
the adjusting mechanism 6 comprises a main motor 601 and an air cylinder 612 which are arranged in the base 1, the main motor 601 is positioned below the air cylinder 612, the output end of the main motor 601 is connected with a first rotating ring 602, and one end of the first rotating ring 602 is sleeved with a second rotating ring 603;
the outer walls of the second rotating ring 603 and the first rotating ring 602 are sleeved with a driving belt 607, the inner side of the other end of the driving belt 607 is provided with a third rotating ring 608 and a fourth rotating ring 609 in a fit manner, and the third rotating ring 608 and the fourth rotating ring 609 are sleeved with each other;
a first rack 606 is arranged on the outer wall of one end of the second rotating ring 603, a first straight gear 611 is meshed with the top end of the first rack 606, a second rack 610 is meshed with the top end of the first straight gear 611, and the outer wall of the second rack 610 is fixedly connected with the output end of the air cylinder 612;
the transmission mechanism 7 is arranged inside the third rotating ring 608 and the fourth rotating ring 609 and fixed on the outer wall of the first rack 606, the transmission mechanism 7 comprises a fourth rack 702 fixed on the inner wall of the third rotating ring 608, the inner wall of the fourth rotating ring 609 is provided with a third rack 701 extending into the third rotating ring 608, a second straight gear 703 rotatably connected with the inner wall of the third rotating ring 608 is meshed between the third rack 701 and the fourth rack 702, and the outer wall of the first rack 606 is provided with a positioning block 704 extending to the inner wall of the second rotating ring 603.
In this embodiment: when the opening length of the groove needs to be adjusted, the air cylinder 612 can be started, the air cylinder 612 works to pull one end of the second rack 610 to move transversely along the first transverse sliding groove, the transverse movement of the second rack 610 synchronously gives thrust to the first straight gear 611 to rotate, the first straight gear 611 transmits the rotating thrust to the first rack 606, the first rack 606 moves transversely under the rotating thrust, and the moving directions of the first rack 606 and the second rack 610 are opposite, so that the moving directions of the third rotating ring 608 connected with the second rack 610 and the second rotating ring 603 connected with the first rack 606 are opposite, when the third rotating ring 608 gives the driving belt 607 with the larger diameter at one end of the driving belt 607, the second rotating ring 603 gradually gets away, the smaller diameter at the other end of the driving belt 607, and the loop bar 613 connected with the outer wall of the third rotating ring 608 performs speed reduction movement, so as to reduce the rotating speed of the material, when the second rotating ring 603 and the third rotating ring 608 move under the pulling force of the cylinder 612, the fourth rack 702 disposed inside the third rotating ring 608 will also move synchronously, the fourth rack 702 will provide a pushing force to the second spur gear 703, the second spur gear 703 will rotate under the pushing force, the second spur gear 703 rotates to transmit the pushing force to the third rack 701, the third rack 701 will drive the fourth rotating ring 709 to move transversely under the pushing force, the third rotating ring 608 and the fourth rotating ring 609 will approach each other, and the pressing force to the transmission belt 607 will be further increased, it should be noted that the surfaces of the transmission belt contacting with the first rotating ring 602, the second rotating ring 603, the third rotating ring 608 and the fourth rotating ring 608 are made of rubber material and wrapped on the outer wall of the steel transmission belt 607, so as to ensure that the transmission belt 607 remains with the first rotating ring 602, the third rotating ring 608 and the fourth rotating ring 608 after being changed, friction between the second rotating ring 603.
Please refer to fig. 2-6, the adjusting mechanism 6 further includes a reciprocating screw 604 sleeved at one end of the second rotating ring 603), an outer wall of the reciprocating screw 604 is sleeved with a positioning rod 605 through a crescent, a top end of the positioning rod 605 is fixedly connected with a bottom end of the working platform 4, one end of the third rotating ring 608 is sleeved with a sleeve rod 613, and one end of the sleeve rod 613 penetrates through the working platform 4 and is fixedly connected with a triangular claw disc 5.
In this embodiment: when the main motor 601 is started, the rotation of the main motor 601 drives the first rotating ring 602, the second rotating ring 603 and the reciprocating screw rod 604 to synchronously rotate, and the rotation of the reciprocating screw rod 604 drives the positioning rod 605 to move along the outer wall thread of the reciprocating screw rod 604, so that the working platform 4 connected with the positioning rod 605 synchronously moves, and the material arranged on the inner side of the working platform 4 is driven to synchronously move.
Please refer to fig. 2-6, a first transverse sliding slot matching with a transverse moving track of the first rack 606 and the second rack 610 is disposed inside the base 1, the first straight gear 611 is rotatably connected with an inner wall of the base 1, outer walls of the first rack 606 and the second rack 610 are in an "L" shape, the inner wall of the base 1 is provided with a second transverse sliding slot matching with a transverse moving track of the positioning rod 605, an outer wall of the transmission belt 607 is in an inclined plane shape, outer walls of the first rotating ring 602, the second rotating ring 603, the third rotating ring 608 and the fourth rotating ring 609 are in an inclined plane shape and are attached to an outer wall of the transmission belt 607, two protrusions are fixedly connected to an outer wall of the third rotating ring 608, a positioning slot matching with an outer wall of the protrusion is disposed on an inner wall of the fourth rotating ring 609, a connecting position of the sleeve rod 613, the third rotating ring 608, the second rotating ring 603 and the reciprocating screw 604 is the same, an output end of the driving motor 3 is connected with a cutter, and an electric push rod 609 for driving the top end of the driving motor 3 to move.
In this embodiment: with this structure, when the third rotating ring 608 is moved by the pushing force of the air cylinder 612, it can move along the track inside the fourth rotating ring 609, on which the cams move, and when the third rotating ring 608 and the fourth rotating ring 609 rotate under the friction force of the transmission belt 607, the cams can make the rotating speeds of the third rotating ring 608 and the fourth rotating ring 609 uniform.
Please refer to fig. 2-6, the number of the positioning blocks 704 is two, the two positioning blocks 704 are uniformly distributed on the outer walls of one ends of the first rack 606 and the second rack 610, the outer walls of the second rotating ring 603 and the third rotating ring 608 are provided with rotating grooves matched with the rotating track of the positioning blocks 704, the number of the third rack 701, the fourth rack 702 and the second spur gear 703 is two, the two positioning blocks are uniformly distributed inside the third rotating ring 608, the fourth rotating ring 609, the first rotating ring 602 and the second rotating ring 603, and the inner wall of the fourth rotating ring 609 is provided with a movable groove matched with the entering track of the third rack 701.
In this embodiment: through the structure, when the first rotating ring 602 and the second rotating ring 603 rotate under the driving action of the main motor 601, the positioning block 704 can move relative to the second rotating ring 603 along the rotating groove on the outer wall of the second rotating ring 603, so that the rotation of the second rotating ring 603 is not influenced by the first rack 606 and the positioning block 704, and when the positioning block 704 is subjected to transverse tension, the second rotating ring 603 can drive the second rotating ring 603 to synchronously move under the connection of the positioning block 704.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims (9)

1. A cam groove finish machining tool comprises a base (1), wherein an upper frame (2) is installed at the top end of the base (1), a driving motor (3) is installed on the inner side of the upper frame (2) through a mounting bracket, a working platform (4) is installed on the inner side of the upper frame (2) and located below the driving motor (3), and the inner wall of the working platform (4) is rotatably connected with a triangular claw disc (5) and is characterized in that an adjusting mechanism (6) is arranged inside the base (1);
the adjusting mechanism (6) comprises a main motor (601) and an air cylinder (612) which are arranged in the base (1), the main motor (601) is positioned below the air cylinder (612), the output end of the main motor (601) is connected with a first rotating ring (602), and one end of the first rotating ring (602) is sleeved with a second rotating ring (603);
the outer walls of the second rotating ring (603) and the first rotating ring (602) are sleeved with a transmission belt (607), the inner side of the other end of the transmission belt (607) is provided with a third rotating ring (608) and a fourth rotating ring (609) in a fit manner, and the third rotating ring (608) and the fourth rotating ring (609) are sleeved with each other;
a first rack (606) is arranged on the outer wall of one end of the second rotating ring (603), a first straight gear (611) is meshed at the top end of the first rack (606), a second rack (610) is meshed at the top end of the first straight gear (611), and the outer wall of the second rack (610) is fixedly connected with the output end of the air cylinder (612);
the transmission mechanism (7) is arranged inside a third rotating ring (608) and a fourth rotating ring (609) and fixed on the outer wall of the first rack (606), the transmission mechanism (7) comprises a fourth rack (702) fixed on the inner wall of the third rotating ring (608), the inner wall of the fourth rotating ring (609) is provided with a third rack (701) extending to the inside of the third rotating ring (608), a second straight gear (703) rotatably connected with the inner wall of the third rotating ring (608) is meshed between the third rack (701) and the fourth rack (702), and a positioning block (704) extending to the inner wall of the second rotating ring (603) is arranged on the outer wall of the first rack (606).
2. The tool for finish machining of the cam groove according to claim 1, wherein the adjusting mechanism (6) further comprises a reciprocating screw rod (604) which is transversely slidably connected to one end of a second rotating ring (603), a positioning rod (605) is sleeved on the outer wall of the reciprocating screw rod (604), the top end of the positioning rod (605) is fixedly connected to the bottom end of the working platform (4), a sleeve rod (613) is sleeved on one end of a third rotating ring (608), and one end of the sleeve rod (613) penetrates through the working platform (4) and is fixedly connected with a triangular claw disc (5).
3. The cam groove finish machining tool according to claim 1, wherein a first transverse sliding groove matched with transverse moving tracks of the first rack (606) and the second rack (610) is formed in the base (1), and the first straight gear (611) is rotatably connected with the inner wall of the base (1).
4. The tool for finish machining of the cam groove according to claim 1, wherein outer walls of the first rack (606) and the second rack (610) are of an L-shaped structure, and a second transverse sliding groove matched with a transverse moving track of the positioning rod (605) is formed in an inner wall of the base (1).
5. A tool set forth in claim 1, wherein the outer wall of the driving belt (607) is in a slant state, and the outer walls of the first rotating ring (602), the second rotating ring (603), the third rotating ring (608) and the fourth rotating ring (609) are in a slant state and are attached to the outer wall of the driving belt (607).
6. The cam groove finish machining tool as claimed in claim 1, wherein two positioning blocks (704) are arranged, and the two positioning blocks (704) are symmetrically distributed on outer walls of one ends of the first rack (606) and the second rack (610).
7. The cam groove finish machining tool according to claim 1, wherein the outer walls of the second rotating ring (603) and the third rotating ring (608) are provided with rotating grooves matched with rotating tracks of the positioning block (704).
8. The cam groove finish machining tool is characterized in that two third racks (701), two fourth racks (702) and two second straight gears (703) are arranged and evenly distributed in a third rotating ring (608), a fourth rotating ring (609), a first rotating ring (602) and a second rotating ring (603), and movable grooves matched with the entering tracks of the third racks (701) are formed in the inner wall of the fourth rotating ring (609).
9. The cam groove finish machining tool according to claim 2, characterized in that two protruding blocks are fixedly connected to the outer wall of the third rotating ring (608) entering the fourth rotating ring (609), a positioning groove matched with the outer wall of the protruding block is formed in the inner wall of the fourth rotating ring (609), the connecting positions of the loop bar (613) and the third rotating ring (608), the second rotating ring (603) and the reciprocating screw rod (604) are the same, a cutter is connected to the output end of the driving motor (3), and an electric push rod for moving the top end driving motor (3) is connected to the top end of the driving motor (3).
CN202211564375.1A 2022-12-07 2022-12-07 Finish machining tool for cam groove Pending CN115870559A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211564375.1A CN115870559A (en) 2022-12-07 2022-12-07 Finish machining tool for cam groove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211564375.1A CN115870559A (en) 2022-12-07 2022-12-07 Finish machining tool for cam groove

Publications (1)

Publication Number Publication Date
CN115870559A true CN115870559A (en) 2023-03-31

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Application Number Title Priority Date Filing Date
CN202211564375.1A Pending CN115870559A (en) 2022-12-07 2022-12-07 Finish machining tool for cam groove

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB332146A (en) * 1928-10-22 1930-07-17 Joseph Dawson Improvements in or relating to apparatus for cutting cam grooves
US2053597A (en) * 1934-03-13 1936-09-08 Bishop Reginald Machine for generating cams of the worm type
CN1613602A (en) * 2004-11-29 2005-05-11 盐城市机床有限公司 Low-speed rotary apparatus for machining cylindrical cam groove
CN103170682A (en) * 2013-04-09 2013-06-26 山东硕泰科技发展有限公司 Machining method for constant angle self-swing cylindrical cam special groove
CN106002412A (en) * 2016-07-26 2016-10-12 山西农业大学信息学院 Fixture special for machining of cam shaft slot curved surface
CN212682710U (en) * 2020-07-02 2021-03-12 海盐金牛机械科技股份有限公司 High-precision transmission screw machining device
CN113102846A (en) * 2021-04-17 2021-07-13 江涛 Precision machining machine and method for manufacturing screw fittings of air compressor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB332146A (en) * 1928-10-22 1930-07-17 Joseph Dawson Improvements in or relating to apparatus for cutting cam grooves
US2053597A (en) * 1934-03-13 1936-09-08 Bishop Reginald Machine for generating cams of the worm type
CN1613602A (en) * 2004-11-29 2005-05-11 盐城市机床有限公司 Low-speed rotary apparatus for machining cylindrical cam groove
CN103170682A (en) * 2013-04-09 2013-06-26 山东硕泰科技发展有限公司 Machining method for constant angle self-swing cylindrical cam special groove
CN106002412A (en) * 2016-07-26 2016-10-12 山西农业大学信息学院 Fixture special for machining of cam shaft slot curved surface
CN212682710U (en) * 2020-07-02 2021-03-12 海盐金牛机械科技股份有限公司 High-precision transmission screw machining device
CN113102846A (en) * 2021-04-17 2021-07-13 江涛 Precision machining machine and method for manufacturing screw fittings of air compressor

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Application publication date: 20230331

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