CN110280844B - Rack chamfering machine - Google Patents
Rack chamfering machine Download PDFInfo
- Publication number
- CN110280844B CN110280844B CN201910672874.4A CN201910672874A CN110280844B CN 110280844 B CN110280844 B CN 110280844B CN 201910672874 A CN201910672874 A CN 201910672874A CN 110280844 B CN110280844 B CN 110280844B
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- China
- Prior art keywords
- feeding platform
- rack
- guide
- chamfering machine
- roller seat
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F19/00—Finishing gear teeth by other tools than those used for manufacturing gear teeth
- B23F19/10—Chamfering the end edges of gear teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/02—Loading, unloading or chucking arrangements for workpieces
- B23F23/06—Chucking arrangements
-
- 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
- B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Gear Processing (AREA)
Abstract
The invention provides a rack chamfering machine, and belongs to the technical field of machine tools. The chamfering machine solves the technical problems that an existing chamfering machine can only chamfer one or two angles at a time, chamfering efficiency is low and the like. The rack chamfering machine comprises a feeding platform, a tool apron and a discharging platform which are sequentially arranged on a machine body from left to right, wherein the feeding platform is in a strip shape and is transversely arranged along the transverse direction, limiting rollers for longitudinally positioning racks on the feeding platform are arranged on the front side and the rear side of the feeding platform along the transverse direction at intervals, and a push rod for driving the racks to transversely enter the tool apron is arranged on the feeding platform. The chamfering machine can automatically jack the racks into the tool apron, and simultaneously chamfer four corners of the racks, so that the working efficiency is high.
Description
Technical Field
The invention belongs to the technical field of machine tools, and particularly relates to a rack chamfering machine.
Background
Racks are very important driving transmission components and are widely applied to industries such as machinery, aviation, instruments and the like. The common production process of the rack mainly comprises the steps of a, milling four sides of a steel bar to form a rack steel billet meeting the size requirement, b, chamfering four edges of the steel bar, c, tooth-shaped processing of the rack steel billet to form the rack (planing, milling, inserting and the like), d, finish milling, grinding and other accurate processing of the rack, and e, processing a positioning mounting hole on the rack. The four edges of the steel bar are chamfered through a chamfering machine, the existing chamfering machine comprises planing, milling and manual chamfering, one or two corners can be chamfered at a time, and chamfering efficiency is low.
Disclosure of Invention
The invention aims to provide a rack chamfering machine capable of improving chamfering efficiency, and chamfering can be performed at the same time by four edges.
The purpose of the invention is realized in the following way:
the utility model provides a rack chamfering machine, includes from left to right sets gradually feeding platform, blade holder and the platform of unloading on the lathe bed, its characterized in that: the feeding platform is long-strip-shaped and is transversely arranged, limiting rollers for longitudinally positioning racks on the feeding platform are arranged on the front side and the rear side of the feeding platform at intervals in the transverse direction, and ejector rods for driving the racks to transversely enter the tool apron are arranged on the feeding platform.
In the rack chamfering machine, a push plate is fixed above the ejector rod, and the push plate is connected with a driving piece for driving the push plate to move transversely. The driving piece comprises a hydraulic oil cylinder and a screw rod, and a connecting part in threaded connection with the screw rod is arranged in the middle of the push plate.
In the rack chamfering machine, two guide rods are transversely arranged above the feeding platform, guide rings are formed at the front end and the rear end of the pushing plate, the guide rings are sleeved on the guide rods and can transversely slide relative to the guide rings, and the driving piece is connected with the middle of the pushing plate.
In the rack chamfering machine, a plurality of bottom plates are arranged on the lathe bed at intervals in the transverse direction, the length direction of the bottom plates is parallel to the longitudinal direction, the feeding platform frame is arranged in the middle of the bottom plates, longitudinal guide rails are arranged at the front end part and the rear end part of each bottom plate, roller seats are fixed on sliding blocks arranged on each longitudinal guide rail in a sliding mode, adjusting mechanisms used for adjusting the relative positions of the guide rails and the sliding blocks are arranged on the bottom plates, and limiting rollers are fixed at the inner ends of the roller seats.
In the above-mentioned rack chamfering machine, the inner end of each roller seat is provided with two spacing rollers along the transverse interval, the inner ends of the spacing rollers positioned on the same side of the feeding platform are all positioned in the same plane, and the plane where the spacing rollers are positioned is positioned on the inner side of the inner side surface of the roller seat on the same side.
In the rack chamfering machine, a cushion block is arranged between each roller seat and each sliding block.
In the rack chamfering machine, the roller seat positioned at the front side of the feeding platform is a fixed roller seat, the adjusting mechanism comprises a baffle fixedly connected with the front end part of the guide rail and an adjusting bolt longitudinally arranged, the adjusting bolt is in threaded connection with a threaded hole on the baffle, and the rear end of the adjusting bolt is connected with the fixed roller seat. The adjusting bolt and the baffle are matched to manually adjust the position of the fixed roller seat in the longitudinal direction, and the front side surface of the rack is limited by the limiting roller arranged at the inner end of the fixed roller seat, so that the rack can be matched with the inlet of the tool apron and smoothly fed into the tool apron by the ejector rod to carry out chamfering operation.
In the rack chamfering machine, the roller seat positioned at the rear side of the feeding platform is a movable roller seat, the adjusting mechanism comprises an air cylinder fixed at the rear side of the guide rail, and the air cylinder can drive the movable roller seat to longitudinally move on the guide rail. Further, the air cylinder is fixed on the bottom plate through the mounting block and is higher than the upper side surface of the movable roller seat, the front end of a piston rod of the air cylinder is fixed with the fixing clip, the upper end surface of the movable roller seat is fixed with the connecting plate, and the connecting plate and the fixing clip are fixedly connected through the forehead connecting rod which is vertically arranged; the arrangement of the cylinder can drive the movable roller seat to move forward when the rack is placed on the feeding platform, so that the front side surface of the rack abuts against the limiting roller arranged on the fixed roller seat, and therefore the rack is positioned, the structure is simple, the operation is convenient, and the stability is high.
In the rack chamfering machine, the left side and the right side of the tool apron are respectively fixed with the guide seats, the outer sides of the two guide seats are detachably fixed with the guide sleeves, and square holes matched with the racks are formed in the middle of the guide sleeves. The guide seat and the guide sleeve are designed to fix the rack longitudinally and vertically, so that the rack cannot deviate when the tool apron chamfers the rack, and the chamfering effect is better and more stable; meanwhile, the detachable guide sleeve can be adapted to racks of different sizes by replacing the guide sleeve, so that the applicability of the rack chamfering machine is improved.
In the rack chamfering machine, the middle part of the tool apron is provided with a cylindrical cavity, the central axis of the cavity and the central axis of the rack are positioned on the same straight line, the lower end of the tool apron is provided with a discharge chute communicated with the cavity, four broaches capable of moving along the radial direction of the cavity are radially arranged on the tool apron, and the connecting lines of the two broaches which are oppositely arranged in the same vertical plane coincide with the connecting lines of the two opposite angles of the rack. The design of the broach is in order to achieve the same included angle between each broach and four angles of the rack during chamfering, and the chamfering effect is improved.
In the rack chamfering machine, the broach is fixed at the inner end part of the clamping cutter bodies, each clamping cutter body can move along the radial direction of the cavity under the driving of the corresponding driving bolt, and the left end and the right end of each driving bolt are respectively provided with a limiting bolt for limiting the outer end of the clamping cutter body in the radial direction. The inner end of the driving bolt is in threaded connection with the clamping cutter body, and the inner end of the limiting bolt abuts against the outer end of the clamping cutter body.
In the rack chamfering machine, the inner ends of the broaches are provided with the tool bits perpendicular to the central axis of the cavity along the transverse interval, the distance between the tool bits and the central axis of the cavity is sequentially reduced from left to right, the distance difference between the two adjacent tool bits ranges from 0.05mm to 0.15mm, and preferably, the distance difference between the two tool bits is 0.1mm. Further, the distance between two adjacent tool bits from left to right increases gradually, and the design that above-mentioned tool bit and cavity axis from left to right reduces in proper order can carry out chamfering operation to the rack by layer, and the rack of chamfer department behind the chamfer is smoother, and is rough less to the damage to the tool bit is little, is favorable to improving the life of broach.
In the rack chamfering machine, two ends of the feeding platform are fixed on the bottom plates arranged at two ends of the feeding platform through the guide clamping grooves, the guide clamping grooves comprise a base plate and two clamping blocks formed on the base plate, the feeding platform is clamped between the two clamping blocks, the base plate is fixedly connected with the bottom plates, and the two ends of the feeding platform are respectively provided with a connecting bolt used for being connected with the base plate and a jacking bolt used for controlling the distance between the two clamping blocks and the base plate.
Compared with the prior art, the invention has the following outstanding and beneficial technical effects:
the chamfering tool can automatically jack the rack into the tool apron, and simultaneously chamfer four corners of the rack, so that the working efficiency is high.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a transverse cross-sectional view of the tool holder of the present invention.
Fig. 4 is a longitudinal sectional view of the tool holder of the present invention.
Fig. 5 is an oblique cross-sectional view of the tool holder of the present invention.
Fig. 6 is a longitudinal cross-sectional view at the bottom plate of the present invention.
In the figure, 1, a feeding platform; 11. a driving member; 111. a push rod; 112. a push plate; 113. a guide rod; 12. a bottom plate; 121. a longitudinal guide rail; 122. a slide block; 123. a cushion block; 124. a roller seat; 125. limiting idler wheels; 126. a baffle; 127. an adjusting bolt; 128. a cylinder; 13. a guide clamping groove; 2. a tool apron; 21. a cavity; 22. a discharge chute; 23. broaching tool; 231. a cutter head; 24. a clamping cutter body; 25. driving a bolt; 26. a limit bolt; 27. a guide seat; 28. a guide sleeve; 3. a discharging platform; 4. a bed body; 5. a rack.
Detailed Description
The invention is further described in the following by way of specific embodiments with reference to the accompanying drawings, see fig. 1-6:
the rack chamfering machine comprises a feeding platform 1, a tool apron 2 and a discharging platform 3 which are sequentially arranged on a machine body 4 from left to right, wherein the feeding platform 1 is in a strip shape and is transversely arranged along the transverse direction, limiting rollers 125 for longitudinally positioning racks 5 on the feeding platform 1 are arranged on the front side and the rear side of the feeding platform 1 along the transverse direction at intervals, and ejector rods 111 for driving the racks 5 to transversely enter the tool apron 2 are arranged on the feeding platform 1. According to the invention, the rack 5 can be automatically jacked into the tool apron 2, chamfering operation is simultaneously carried out on four corners of the rack 5, and the working efficiency is high.
As shown in fig. 1 and 2, a push plate 112 is fixed above the push rod 111, the push plate 112 is connected with a driving piece 11 for driving the push plate 112 to move transversely, the driving piece 11 comprises a hydraulic cylinder and a screw rod, and the middle part of the push plate 112 is provided with a connecting part in threaded connection with the screw rod; two guide rods 113 are transversely arranged above the feeding platform 1, guide rings are formed at the front end and the rear end of the push plate 112, the guide rings are sleeved on the guide rods 113 and can transversely slide relative to the guide rings, and the driving piece 11 is connected with the middle of the push plate 112.
As shown in fig. 2, a plurality of bottom plates 12 are arranged on the machine body 4 at intervals along the transverse direction, the length direction of the bottom plates 12 is parallel to the longitudinal direction, a feeding platform 1 is erected in the middle of the bottom plates 12, longitudinal guide rails 121 are arranged at the front end part and the rear end part of each bottom plate 12, roller seats 124 are fixed on sliding blocks 122 slidably arranged on each longitudinal guide rail 121, an adjusting mechanism for adjusting the relative positions of the guide rails and the sliding blocks 122 is arranged on the bottom plates 12, and limiting rollers 125 are fixed at the inner end parts of the roller seats 124; the inner end of each roller seat 124 is provided with two limiting rollers 125 at intervals along the transverse direction, the inner ends of the limiting rollers 125 positioned on the same side of the feeding platform 1 are positioned in the same plane, and the plane where the limiting rollers 125 are positioned is positioned on the inner side of the inner side surface of the roller seat 124 on the same side; a cushion block 123 is arranged between each roller seat 124 and the sliding block 122; the two ends of the feeding platform 1 are fixed on the bottom plates 12 arranged at the two ends of the feeding platform 1 through the guide clamping grooves 13, the guide clamping grooves 13 comprise a substrate and two clamping blocks formed on the substrate, the feeding platform 1 is clamped between the two clamping blocks, the substrate is fixedly connected with the bottom plates 12, and the two ends of the feeding platform 1 are respectively provided with a connecting bolt used for being connected with the substrate and a jacking bolt used for controlling the distance between the substrate and the connecting bolts.
As shown in fig. 6, the roller seat 124 at the front side of the feeding platform 1 is a fixed roller seat 124, the adjusting mechanism comprises a baffle 126 fixedly connected with the front end of the guide rail and an adjusting bolt 127 longitudinally arranged, the adjusting bolt 127 is in threaded connection with a threaded hole on the baffle 126, and the rear end of the adjusting bolt 127 is connected with the fixed roller seat 124; the roller seat 124 at the rear side of the feeding platform 1 is a movable roller seat 124, and the adjusting mechanism comprises an air cylinder 128 fixed at the rear side of the guide rail, wherein the air cylinder 128 can drive the movable roller seat 124 to longitudinally move on the guide rail. The adjusting bolt 127 and the baffle 126 are matched to manually adjust the position of the fixed roller seat 124 in the longitudinal direction, and limit the front side surface of the rack 5 through the limiting roller 125 arranged at the inner end of the fixed roller seat 124, so that the rack 5 can be matched with the inlet of the tool apron 2 and smoothly conveyed into the tool apron 2 by the ejector rod 111 to perform chamfering operation; further, the air cylinder 128 is fixed on the bottom plate 12 through a mounting block, the air cylinder 128 is higher than the upper side surface of the movable roller seat 124, a fixing clip is fixed at the front end of a piston rod of the air cylinder 128, a connecting plate is fixed at the upper end surface of the movable roller seat 124, and the connecting plate and the fixing clip are fixedly connected through a forehead connecting rod which is vertically arranged; the arrangement of the cylinder 128 can drive the movable roller seat 124 to move forward when the rack 5 is placed on the feeding platform 1, so that the front side surface of the rack 5 abuts against the limiting roller 125 arranged on the fixed roller seat 124, thereby positioning the rack 5, having simple structure, convenient operation and high stability.
As shown in fig. 3-5, guide seats 27 are respectively fixed at the left side and the right side of the tool apron 2, guide sleeves 28 are detachably fixed at the outer sides of the two guide seats 27, and square holes matched with the racks 5 are formed in the middle of the guide sleeves 28; the middle part of the tool apron 2 is provided with a cylindrical cavity 21, the central axis of the cavity 21 and the central axis of the rack 5 are positioned on the same straight line, the lower end of the tool apron 2 is provided with a discharge chute 22 communicated with the cavity 21, four broaches 23 which can move along the radial direction of the cavity 21 are radially arranged on the tool apron 2, and the connecting lines of the two broaches 23 which are oppositely arranged in the same vertical plane are overlapped with the connecting lines of the two opposite angles of the rack 5; the broach 23 is fixed at the inner end part of the clamping cutter bodies 24, each clamping cutter body 24 can move along the radial direction of the cavity 21 under the drive of the corresponding driving bolt 25, and the left end and the right end of each driving bolt 25 are provided with limiting bolts 26 for radially limiting the outer ends of the clamping cutter bodies 24; the inner ends of the broaches 23 are provided with tool bits 231 which are perpendicular to the central axis of the cavity 21 at intervals in the transverse direction, the distances between the tool bits 231 and the central axis of the cavity 21 are sequentially reduced from left to right, and the distance difference between two adjacent tool bits 231 is 0.05mm-0.15mm, preferably, the distance difference between the two tool bits is 0.1mm. The design of the guide seat 27 and the guide sleeve 28 can fix the rack 5 longitudinally and vertically, so that the rack 5 cannot deviate when the tool apron 2 chamfers the rack 5, and the chamfering effect is better and more stable; meanwhile, the detachable guide sleeve 28 can be adapted to racks 5 with different sizes by replacing the guide sleeve 28, so that the applicability of the rack chamfering machine is improved; the design of the broaches 23 is to make the included angles of each broach 23 and the four angles of the rack 5 consistent during chamfering, which is beneficial to improving chamfering effect; the inner end of the driving bolt 25 is in threaded connection with the clamping cutter body 24, and the inner end of the limiting bolt 26 abuts against the outer end of the clamping cutter body 24; the distance between two adjacent tool bits 231 from left to right increases gradually, and the design that above-mentioned tool bit 231 from left to right reduces in proper order with the distance of cavity 21 axis can carry out the chamfer operation to rack 5 by layer, and rack 5 of chamfer department behind the chamfer is smoother, and is rough less to the damage to tool bit 231 is little, is favorable to improving broach 23's life.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (8)
1. The utility model provides a rack chamfering machine, includes from left to right feeding platform (1), blade holder (2) and platform (3) of unloading that set gradually on lathe bed (4), its characterized in that: the feeding platform (1) is in a strip shape and is transversely arranged along the transverse direction, limiting rollers (125) for longitudinally positioning racks (5) on the feeding platform (1) are arranged at the front side and the rear side of the feeding platform (1) along the transverse direction at intervals, a push rod (111) for driving the racks (5) to transversely enter a tool apron (2) is arranged on the feeding platform (1), a plurality of bottom plates (12) are arranged on the machine bed (4) along the transverse direction at intervals, the length direction of the bottom plates (12) is parallel to the longitudinal direction, the feeding platform (1) is erected in the middle of the bottom plates (12), longitudinal guide rails (121) are respectively arranged at the front end part and the rear end part of each bottom plate (12), roller seats (124) are respectively fixed on sliding blocks (122) arranged on each longitudinal guide rail (121), cushion blocks (123) are respectively arranged between each roller seat (124) and each sliding block (122), adjusting mechanisms for adjusting the relative positions of the guide rails and the sliding blocks (122) are respectively fixed at the inner end parts of the tool apron (124), the left guide rails (2) and the right guide sleeves (27) are respectively fixed at the two guide sleeves (28) which can be matched with the guide rails (28), the middle part of blade holder (2) has cylindric cavity (21), the axis of cavity (21) is located same straight line with the axis of rack (5), the lower extreme of blade holder (2) is equipped with discharge chute (22) with cavity (21) intercommunication, be radially on blade holder (2) and be provided with four broach (23) that can follow the radial movement of cavity (21), the line of two broach (23) of relative setting in the same vertical plane coincides with the line of two diagonal angles of rack (5).
2. A rack chamfering machine as defined in claim 1, wherein: a push plate (112) is fixed above the ejector rod (111), and the push plate (112) is connected with a driving piece (11) for driving the push plate (112) to move transversely.
3. A rack chamfering machine as defined in claim 2, wherein: two guide rods (113) are transversely arranged above the feeding platform (1), guide rings are formed at the front end and the rear end of the push plate (112), the guide rings are sleeved on the guide rods (113) and can transversely slide relative to the guide rings, and the driving piece (11) is connected with the middle of the push plate (112).
4. A rack chamfering machine as defined in claim 1, wherein: the two ends of the feeding platform (1) are fixed on a bottom plate (12) arranged at the two ends of the feeding platform (1) through guide clamping grooves (13), the guide clamping grooves (13) comprise a substrate and two clamping blocks formed on the substrate, the feeding platform (1) is clamped between the two clamping blocks, the substrate is fixedly connected with the bottom plate (12), and connecting bolts used for being connected with the substrate and jacking bolts used for controlling the distance between the substrate and the two ends of the feeding platform (1) are arranged.
5. A rack chamfering machine as defined in claim 1, wherein: the inner end of each roller seat (124) is provided with two limiting rollers (125) along the transverse interval, the inner ends of the limiting rollers (125) positioned on the same side of the feeding platform (1) are positioned in the same plane, and the plane where the limiting rollers (125) are positioned is positioned on the inner side of the inner side surface of the roller seat (124) on the same side.
6. A rack chamfering machine as defined in claim 1, wherein: the roller seat (124) positioned at the front side of the feeding platform (1) is a fixed roller seat (124), the corresponding adjusting mechanism comprises a baffle plate (126) fixedly connected with the front end part of the guide rail and an adjusting bolt (127) longitudinally arranged, the adjusting bolt (127) is in threaded connection with a threaded hole on the baffle plate (126), and the rear end of the adjusting bolt (127) is connected with the fixed roller seat (124); the roller seat (124) positioned at the rear side of the feeding platform (1) is a movable roller seat (124), the corresponding adjusting mechanism comprises an air cylinder (128) fixed at the rear side of the guide rail, and the air cylinder (128) can drive the movable roller seat (124) to longitudinally move on the guide rail.
7. A rack chamfering machine as defined in claim 1, wherein: the broach (23) is fixed to the inner end part of the clamping cutter bodies (24), each clamping cutter body (24) can move along the radial direction of the cavity (21) under the driving of the corresponding driving bolt (25), and limiting bolts (26) for radially limiting the outer ends of the clamping cutter bodies (24) are arranged at the left end and the right end of each driving bolt (25).
8. The rack chamfering machine as recited in claim 7, wherein: the inner end of the broach (23) is provided with tool bits (231) which are perpendicular to the central axis of the cavity (21) along the transverse interval, and the distance between the tool bits (231) and the central axis of the cavity (21) is sequentially reduced from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910672874.4A CN110280844B (en) | 2019-07-24 | 2019-07-24 | Rack chamfering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910672874.4A CN110280844B (en) | 2019-07-24 | 2019-07-24 | Rack chamfering machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110280844A CN110280844A (en) | 2019-09-27 |
| CN110280844B true CN110280844B (en) | 2023-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910672874.4A Active CN110280844B (en) | 2019-07-24 | 2019-07-24 | Rack chamfering machine |
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| Country | Link |
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| CN (1) | CN110280844B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4662804A (en) * | 1985-04-22 | 1987-05-05 | Kabushikigaisha Iwasa Tekkosho | Automatic chamfering machine |
| CN103846481A (en) * | 2014-03-31 | 2014-06-11 | 浙江博雷重型机床制造有限公司 | Combined processing production line for rack steel billet |
| CN103878444A (en) * | 2014-03-31 | 2014-06-25 | 浙江博雷重型机床制造有限公司 | Toothed bar billet chamfering machine with discharging platform |
-
2019
- 2019-07-24 CN CN201910672874.4A patent/CN110280844B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4662804A (en) * | 1985-04-22 | 1987-05-05 | Kabushikigaisha Iwasa Tekkosho | Automatic chamfering machine |
| CN103846481A (en) * | 2014-03-31 | 2014-06-11 | 浙江博雷重型机床制造有限公司 | Combined processing production line for rack steel billet |
| CN103878444A (en) * | 2014-03-31 | 2014-06-25 | 浙江博雷重型机床制造有限公司 | Toothed bar billet chamfering machine with discharging platform |
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| CN110280844A (en) | 2019-09-27 |
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