CA1082507A - Helical pot broaching machine - Google Patents
Helical pot broaching machineInfo
- Publication number
- CA1082507A CA1082507A CA297,090A CA297090A CA1082507A CA 1082507 A CA1082507 A CA 1082507A CA 297090 A CA297090 A CA 297090A CA 1082507 A CA1082507 A CA 1082507A
- Authority
- CA
- Canada
- Prior art keywords
- pot
- broach
- helical
- workpiece
- pot broach
- 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.)
- Expired
Links
Landscapes
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
HELICAL POT BROACHING MACHINE
ABSTRACT OF THE DISCLOSURE
A helical pot broaching machine has a pot broach mounted to a base support structure. Means for rotating a part while it is being pushed through the pot broach is mounted in-line with the pot broach and is connected to a driving piston mounted in-line with the rotating means. The rotating means includes a helical nut housing mounted on the inlet of the pot broach and a threaded helical lead bar connected to the driving piston at one end through a swivel joint. The lead bar has a collet attached to the other end which attaches to a part at the inlet of the pot broach. As the piston vertically pushes the lead bar and attached part through the pot broach, the helical nut imparts rotary motion to the lead bar causing the part attached thereto to be also rotated as it passes through the pot broach.
ABSTRACT OF THE DISCLOSURE
A helical pot broaching machine has a pot broach mounted to a base support structure. Means for rotating a part while it is being pushed through the pot broach is mounted in-line with the pot broach and is connected to a driving piston mounted in-line with the rotating means. The rotating means includes a helical nut housing mounted on the inlet of the pot broach and a threaded helical lead bar connected to the driving piston at one end through a swivel joint. The lead bar has a collet attached to the other end which attaches to a part at the inlet of the pot broach. As the piston vertically pushes the lead bar and attached part through the pot broach, the helical nut imparts rotary motion to the lead bar causing the part attached thereto to be also rotated as it passes through the pot broach.
Description
~O~Z5V7 BACKGROUND OF THE INVENTION
Field of the Invention The present invention generally relates to pot broach-ing machines and particularly to helical pot broaching machines having an in-line driving means and rotating means to rotatably translate a part through a pot broach.
Description of the Prior Art Machines for broaching the teeth on a gear as a conse-quence of a single passage of a work blank through a broach are known. The teeth of the broach are located in a pot broach f`or internal broaching and are usually arranged in longitudinal alignment and are appropriately stepped to perform the required tooth cutting operation. If the gear is a spur gear the teeth are arranged in series extending parallel to the axis of the broach. If the gear is a helical gear the teeth are arranged in helically extending series.
A single passage of the gear blank upwardly through the broach results in a complete cutting operation forming the required teeth on the periphery of the gear. The gear is moved upwardly above the upper open end of the broach into a clearance position relative to the broach. It is at this time moved from the work support to a chute which may be downwardly directed.
If the gear is to be a helical gear the gear blank must also be rotated relative to the broach while it is being pushed through the broach.
Prior art helical broaching has been accomplished by rotating mechanisms of various sorts offset mounted from the broach and being driven by similarly offset driving means. Off-setting the rotating and driving means from the broach intro-duces unsymmetr;c loadingj error, and backlash in the system.
Field of the Invention The present invention generally relates to pot broach-ing machines and particularly to helical pot broaching machines having an in-line driving means and rotating means to rotatably translate a part through a pot broach.
Description of the Prior Art Machines for broaching the teeth on a gear as a conse-quence of a single passage of a work blank through a broach are known. The teeth of the broach are located in a pot broach f`or internal broaching and are usually arranged in longitudinal alignment and are appropriately stepped to perform the required tooth cutting operation. If the gear is a spur gear the teeth are arranged in series extending parallel to the axis of the broach. If the gear is a helical gear the teeth are arranged in helically extending series.
A single passage of the gear blank upwardly through the broach results in a complete cutting operation forming the required teeth on the periphery of the gear. The gear is moved upwardly above the upper open end of the broach into a clearance position relative to the broach. It is at this time moved from the work support to a chute which may be downwardly directed.
If the gear is to be a helical gear the gear blank must also be rotated relative to the broach while it is being pushed through the broach.
Prior art helical broaching has been accomplished by rotating mechanisms of various sorts offset mounted from the broach and being driven by similarly offset driving means. Off-setting the rotating and driving means from the broach intro-duces unsymmetr;c loadingj error, and backlash in the system.
2 ~
SUMMARY OF THE INYENTION
The present invention solves the forementioned problemsassociated with the prior art devices as well as others by pro-viding an in-line helical pot broaching machine in which the pot broach is mounted in-line with the rotating means and the driving means.
In a specific embodiment the present invention has a support base having a horizontal face on which the pot broach is vertically mounted with the inlet side of the pot broach being affixed to the horizontal face of the support base. This mount-ing yields a symmetrical loading around the center line of the work and tool axis and provides more rigidity than the usual vertical surface mounted pot broaches. A helical nut housing having a helical nut is mounted to the support base in-line with the pot broach. A helical lead bar is connected to a hydraulic drive piston through a swivel joint to allow the lead bar to ro-tate in the helical nut in response to the translational motion . of the drive piston. The lead bar has an expanding collet at the end to grasp the part. Thus the part is rotated while it is being pushed through the stationary pot broach by a drive assem-bly which is in-line with the pot broach eliminating slop and backlash found in known prior art offset drive mechanisms.
From the foregoing it will be seen that one aspect of the present invention is to provide a helical pot broaching machine.
Another aspect of the present invention is to provide a helical pot broach having a drive assembly mounted in-line with the pot broach.
These and other aspects of the present invention will be more fully understood after a review of the following description of the preferred embodiments and the drawings.
RIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a side view of the present pot broach machine in the down pos1tion.
6 Fig. 2 is an expanded view of the helical nut and lead bar of the machine of Fig. 1 in the up position.
Fig. 3 is a top view of the machine of Fig. 1.
DESCRIPTION OF THE PREFER~ED EMBODIMENT
Referring now to the drawings, Fig. 1 discloses a pot broaching machine 10 which has a known pot broach 12 vertically mounted along its horizontal base 74 to a support structure 16.
The horizontal base 14 has the pot broach 12 rigidly affixed thereto by well known means such as nuts and bolts 18.
The pot broach 12 has an opening 20 through which a blank work-plece 22 is inserted into the pot broach 12 by known loading mechanisms (not shown~, The support structure 16 affixed to a floor 24 which supports a known piston and cylinder device 26 in which a piston (not shown) is vertically movable in-line with the pot broach 12. The vertical mounting of the pot broach 12 along a horizontal end to the support structure 16 provides a symmetri-cal loading around the center line of the machine 10 yielding added rigidity to the entire structure.
The machine 10 in operation loads the blank workpiece 22 to one end of the pot broach 12 and unloads the finished work-piece 22 from the top of the pot broach 12. To accomplish this loading-unloading, a known work transfer mechanism (not shown) is provided which operates between a loading chute and an un-loading chute. An example of such a mechanism is shown in U.S. Patent No. 4,027,574, issued to The Babcock & Wilcox Company; John Xavier Russell, inventor; title, POT BROACHING
MACHINE, and the reader is referred thereto for a more detailed description.
Since the broaching operation requires liquid cooling and results in the formation of metal chips, a liquid and chip collector 28 is sealably mounted around the base of the support structure 16. The collector 28 directs the metal chips and cooling liquid along an outlet to a reservoir where the chips are filtered from the coolant and the coolant is recycled back to the machine 10.
As can be seen from Figs. 1 through 3, the driving means for pushing and simultaneously rotating the blank work-piece 22 through the pot broach 12 is such that all required mo-tion is performed in a straight line along the vertical axis of the pot broach 12. This eliminates the necessity of utilizing an offset hydraulic cylinder or other means of supplying linear motion or an offset location for the pot broach as is prevalent in known prior art devices. As a result of this in-line arrange-ment, the machine 10 requires minimum floor space and produces less downtime and maintenance cost due to the reduction of the number of components required and the simpler constructional nature of the few remaining components necessary for the opera-tion of the in-line arrangement. The in-line arrangement also makes possible the taking advantage of high speed broaching.
Linear vertical motion of the blank workpiece 22 through the pot broach 12 is provided by the piston and cylinder assembly 26 being mounted directly under the pot broach 12 to allow the piston 32 to be extended up and down in response to fluid pressure provided to the piston assembly 26 through hy-draulic connecting lines 34~ The piston 32 is connected to a shaft 36 which terminates in an expandable collet 38 used to '1~50~
~igidly hold the blank workpiece 22 to the shaft 36 by way of the collet 38. The shaft 36 is connected to the piston 32 through a collet actuating device 42 well known to those skilled in the art. From the foregoing it will be understood that as the blank workpiece 22 is slid into the pot broach 12 through the passageway 20, it is aligned with the expandable collet 38.
An actuating signal to the hydraulic cylinder 26 causes the piston 32 to move up actuating the collet actuating device 42 and causing the expandable collet 38 to slide into a hole 46 of the blank workpiece 22 and expand therein causing the blank workpiece 22 to be securely and nonrotatably fixed onto the shaft 36. Without any further mechanisms the blank workpiece 22 would now be pushed up through the pot broach 12 to provide a finished workpiece 22. However, since the workpiece 22 must be rotated while it is being pushed through the pot broach 12, a helical nut housing 48 having a helical nut 50 and a helical lead bar 52 are provided.
The helical nut housing 48 is mounted in-line below the pot broach 12 to be rigidly secured to the frame 16. The helical lead bar 52 is fixed to the shaft 36 and the collet actuating device by known means such as a pin 54 to require the helical lead bar 52, the collet actuating device 42 and the shaft 36 to move and rotate as a single unit. The helical lead bar 52 is coupled to the piston 32 through a swivel ioint 56 which allows the piston 32 to exhibit purely linear motion to push the collet actuating device 42 to the shaft 36 and the lead bar 52 in a vertical direction while allowing the lead bar 52 along with the shaft 36 and the collet actuating device 42 to rotate around the piston 32. The helical lead bar 52 is made of hardened and ground high speed steel that has ground helical ~ 5V7 guide grooves 58 ground on the lower portion of the lead bar 52 where these grooves 58 engage the helical nut 50 which has complimentary grooves.
In the down position shown in Fig. 1, the grooves 58 5 are engaged with the complimentary grooves of the helical nut 50.
Thus, when the blank workpiece 22 is aligned with the expandable collet 38 and a upward stroke is initiated, the upward movement of the piston 32 will cause the helical lead bar 52 to rotate as it is laterally pushed through the stationary helical nut housing 48. Since the shaft 36 is rigidly connected to the helical iead bar 52, the workpiece 22 rigidly afflxed to the expandable collet 38 will also be rotated as it is pushed through the pot broach 12. Towards the end of the upward stroke as the broached work-piece 22 approaches the exit 60 of the pot broach 12, the work-piece 22 encounters a series of spring-loaded stripper fingers 62. Further motion of the workpiece 22 causes the stripper finger 62 to be pushed out by cam action unt.l the workpiece is raised above the stripper finger 62 at which time they will spring back and provide a rest for the finished workpiece 22.
Release of pressure from the shaft 32 on the collet actuating device 42 will cause the expandable collet 38 to release its grip on the finished workpiece 22 allowing the drive assembly 30 to be lowered with the finished workpiece 22 remaining on the pot broach outlet 60 in its resting position on the stripper finger 62. The finished workpiece 22 may now be moved out by a work transfer mechanism with another unfin;shed blank workpiece 22 being inserted into the pot broach 12.
To prevent any contaminants such as chips and chip and coolant mixture from entering the helical grooves of either the lead bar or the helical nut 50, a guide and wiper assembly 64 is . .
10~ 50'7 mounted between the inlet of the pot broach 12 and the helical nut housing 48. This guide and wiper assembly 64 includes a flexible member 66 which allows the shaft 36 to move through it while preventing any chips and coolant from by-passing the flexible member 66 to reach the helical grooves 58. Although the foregoing discussion has dealt with a bottom-loading push-up broaching machine, it will be understood that the described in-line broaching principle equally applies to push-down, pull-up, or pull-down broaching arrangements which may be further accom-plished either horizontally or vertically. Since such modifica-tions would be well within the expertise of people skilled in the art, these various embodiments are not shown for the sake of conciseness and readability but are intended to be covered by the scope of the following claims.
SUMMARY OF THE INYENTION
The present invention solves the forementioned problemsassociated with the prior art devices as well as others by pro-viding an in-line helical pot broaching machine in which the pot broach is mounted in-line with the rotating means and the driving means.
In a specific embodiment the present invention has a support base having a horizontal face on which the pot broach is vertically mounted with the inlet side of the pot broach being affixed to the horizontal face of the support base. This mount-ing yields a symmetrical loading around the center line of the work and tool axis and provides more rigidity than the usual vertical surface mounted pot broaches. A helical nut housing having a helical nut is mounted to the support base in-line with the pot broach. A helical lead bar is connected to a hydraulic drive piston through a swivel joint to allow the lead bar to ro-tate in the helical nut in response to the translational motion . of the drive piston. The lead bar has an expanding collet at the end to grasp the part. Thus the part is rotated while it is being pushed through the stationary pot broach by a drive assem-bly which is in-line with the pot broach eliminating slop and backlash found in known prior art offset drive mechanisms.
From the foregoing it will be seen that one aspect of the present invention is to provide a helical pot broaching machine.
Another aspect of the present invention is to provide a helical pot broach having a drive assembly mounted in-line with the pot broach.
These and other aspects of the present invention will be more fully understood after a review of the following description of the preferred embodiments and the drawings.
RIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a side view of the present pot broach machine in the down pos1tion.
6 Fig. 2 is an expanded view of the helical nut and lead bar of the machine of Fig. 1 in the up position.
Fig. 3 is a top view of the machine of Fig. 1.
DESCRIPTION OF THE PREFER~ED EMBODIMENT
Referring now to the drawings, Fig. 1 discloses a pot broaching machine 10 which has a known pot broach 12 vertically mounted along its horizontal base 74 to a support structure 16.
The horizontal base 14 has the pot broach 12 rigidly affixed thereto by well known means such as nuts and bolts 18.
The pot broach 12 has an opening 20 through which a blank work-plece 22 is inserted into the pot broach 12 by known loading mechanisms (not shown~, The support structure 16 affixed to a floor 24 which supports a known piston and cylinder device 26 in which a piston (not shown) is vertically movable in-line with the pot broach 12. The vertical mounting of the pot broach 12 along a horizontal end to the support structure 16 provides a symmetri-cal loading around the center line of the machine 10 yielding added rigidity to the entire structure.
The machine 10 in operation loads the blank workpiece 22 to one end of the pot broach 12 and unloads the finished work-piece 22 from the top of the pot broach 12. To accomplish this loading-unloading, a known work transfer mechanism (not shown) is provided which operates between a loading chute and an un-loading chute. An example of such a mechanism is shown in U.S. Patent No. 4,027,574, issued to The Babcock & Wilcox Company; John Xavier Russell, inventor; title, POT BROACHING
MACHINE, and the reader is referred thereto for a more detailed description.
Since the broaching operation requires liquid cooling and results in the formation of metal chips, a liquid and chip collector 28 is sealably mounted around the base of the support structure 16. The collector 28 directs the metal chips and cooling liquid along an outlet to a reservoir where the chips are filtered from the coolant and the coolant is recycled back to the machine 10.
As can be seen from Figs. 1 through 3, the driving means for pushing and simultaneously rotating the blank work-piece 22 through the pot broach 12 is such that all required mo-tion is performed in a straight line along the vertical axis of the pot broach 12. This eliminates the necessity of utilizing an offset hydraulic cylinder or other means of supplying linear motion or an offset location for the pot broach as is prevalent in known prior art devices. As a result of this in-line arrange-ment, the machine 10 requires minimum floor space and produces less downtime and maintenance cost due to the reduction of the number of components required and the simpler constructional nature of the few remaining components necessary for the opera-tion of the in-line arrangement. The in-line arrangement also makes possible the taking advantage of high speed broaching.
Linear vertical motion of the blank workpiece 22 through the pot broach 12 is provided by the piston and cylinder assembly 26 being mounted directly under the pot broach 12 to allow the piston 32 to be extended up and down in response to fluid pressure provided to the piston assembly 26 through hy-draulic connecting lines 34~ The piston 32 is connected to a shaft 36 which terminates in an expandable collet 38 used to '1~50~
~igidly hold the blank workpiece 22 to the shaft 36 by way of the collet 38. The shaft 36 is connected to the piston 32 through a collet actuating device 42 well known to those skilled in the art. From the foregoing it will be understood that as the blank workpiece 22 is slid into the pot broach 12 through the passageway 20, it is aligned with the expandable collet 38.
An actuating signal to the hydraulic cylinder 26 causes the piston 32 to move up actuating the collet actuating device 42 and causing the expandable collet 38 to slide into a hole 46 of the blank workpiece 22 and expand therein causing the blank workpiece 22 to be securely and nonrotatably fixed onto the shaft 36. Without any further mechanisms the blank workpiece 22 would now be pushed up through the pot broach 12 to provide a finished workpiece 22. However, since the workpiece 22 must be rotated while it is being pushed through the pot broach 12, a helical nut housing 48 having a helical nut 50 and a helical lead bar 52 are provided.
The helical nut housing 48 is mounted in-line below the pot broach 12 to be rigidly secured to the frame 16. The helical lead bar 52 is fixed to the shaft 36 and the collet actuating device by known means such as a pin 54 to require the helical lead bar 52, the collet actuating device 42 and the shaft 36 to move and rotate as a single unit. The helical lead bar 52 is coupled to the piston 32 through a swivel ioint 56 which allows the piston 32 to exhibit purely linear motion to push the collet actuating device 42 to the shaft 36 and the lead bar 52 in a vertical direction while allowing the lead bar 52 along with the shaft 36 and the collet actuating device 42 to rotate around the piston 32. The helical lead bar 52 is made of hardened and ground high speed steel that has ground helical ~ 5V7 guide grooves 58 ground on the lower portion of the lead bar 52 where these grooves 58 engage the helical nut 50 which has complimentary grooves.
In the down position shown in Fig. 1, the grooves 58 5 are engaged with the complimentary grooves of the helical nut 50.
Thus, when the blank workpiece 22 is aligned with the expandable collet 38 and a upward stroke is initiated, the upward movement of the piston 32 will cause the helical lead bar 52 to rotate as it is laterally pushed through the stationary helical nut housing 48. Since the shaft 36 is rigidly connected to the helical iead bar 52, the workpiece 22 rigidly afflxed to the expandable collet 38 will also be rotated as it is pushed through the pot broach 12. Towards the end of the upward stroke as the broached work-piece 22 approaches the exit 60 of the pot broach 12, the work-piece 22 encounters a series of spring-loaded stripper fingers 62. Further motion of the workpiece 22 causes the stripper finger 62 to be pushed out by cam action unt.l the workpiece is raised above the stripper finger 62 at which time they will spring back and provide a rest for the finished workpiece 22.
Release of pressure from the shaft 32 on the collet actuating device 42 will cause the expandable collet 38 to release its grip on the finished workpiece 22 allowing the drive assembly 30 to be lowered with the finished workpiece 22 remaining on the pot broach outlet 60 in its resting position on the stripper finger 62. The finished workpiece 22 may now be moved out by a work transfer mechanism with another unfin;shed blank workpiece 22 being inserted into the pot broach 12.
To prevent any contaminants such as chips and chip and coolant mixture from entering the helical grooves of either the lead bar or the helical nut 50, a guide and wiper assembly 64 is . .
10~ 50'7 mounted between the inlet of the pot broach 12 and the helical nut housing 48. This guide and wiper assembly 64 includes a flexible member 66 which allows the shaft 36 to move through it while preventing any chips and coolant from by-passing the flexible member 66 to reach the helical grooves 58. Although the foregoing discussion has dealt with a bottom-loading push-up broaching machine, it will be understood that the described in-line broaching principle equally applies to push-down, pull-up, or pull-down broaching arrangements which may be further accom-plished either horizontally or vertically. Since such modifica-tions would be well within the expertise of people skilled in the art, these various embodiments are not shown for the sake of conciseness and readability but are intended to be covered by the scope of the following claims.
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A pot broaching machine comprising:
a mounting member;
a pot broach mounted to said mounting member and having a workpiece inlet at one end and a workpiece outlet at an opposite end; and means mounted to said mounting member to be in-line with said pot broach for simultaneously pushing and rotating a workpiece through the pot broach including vertical motion means mounted in-line with said pot broach, a helical nut mounted in-line with the inlet of said pot broach and a helical lead bar rotatable in said helical nut in response to vertical motion from said vertical motion means.
a mounting member;
a pot broach mounted to said mounting member and having a workpiece inlet at one end and a workpiece outlet at an opposite end; and means mounted to said mounting member to be in-line with said pot broach for simultaneously pushing and rotating a workpiece through the pot broach including vertical motion means mounted in-line with said pot broach, a helical nut mounted in-line with the inlet of said pot broach and a helical lead bar rotatable in said helical nut in response to vertical motion from said vertical motion means.
2. A pot broaching machine as set forth in claim 1 wherein said mounting member includes a rigid base structure for mounting the workpiece inlet end of said pot broach thereto to provide symmetrical force loading of the machine.
3. A pot broaching machine as set forth in claim 1 including means for sealing said pushing and rotating means from cooling fluid and work chips from said pot broach.
4. A pot broaching machine comprising:
a pot broach having an inlet end for inserting a rough workpiece therein and an outlet end for extracting a finished workpiece therefrom;
a base structure for supporting said pot broach thereon along a horizontal surface, the inlet end of said pot broach being rigidly affixed to said base structure; and means, mounted to said base structure, for simultan-eously pushing and rotating said rough workpiece through said pot broach including linear motion means, mounted in-line with said pot broach, for linearly pushing the workpiece through said pot broach, and rotational means responsive to said linear motion means for rotating the workpiece as it is pushed through said pot broach by said linear motion means.
a pot broach having an inlet end for inserting a rough workpiece therein and an outlet end for extracting a finished workpiece therefrom;
a base structure for supporting said pot broach thereon along a horizontal surface, the inlet end of said pot broach being rigidly affixed to said base structure; and means, mounted to said base structure, for simultan-eously pushing and rotating said rough workpiece through said pot broach including linear motion means, mounted in-line with said pot broach, for linearly pushing the workpiece through said pot broach, and rotational means responsive to said linear motion means for rotating the workpiece as it is pushed through said pot broach by said linear motion means.
5. A pot broaching machine as set forth in claim 4 wherein said linear motion means includes a hydraulic piston and cylinder assembly mounted to said base structure to have the piston in-line with the inlet end of said pot broach and said rotational means includes a helical nut assembly mounted to said base structure to be in-line with the inlet end of said pot broach and a helical lead bar rotatably connected to the piston of said piston and cylinder assembly at one end and being coupled to the helical nut at the opposite end to rotate in said helical nut in response to lateral motion of the piston of said piston and cylinder assembly.
6. A pot broaching machine as set forth in claim 5 including:
workpiece holding means extending from the opposite end of said helical lead bar for holding the workpiece thereon;
and a seal assembly mounted to said base structure proximately to the inlet of said pot broach to allow said workpiece holding means to laterally move and rotate therein while preventing any workpiece chips from passing therethrough.
workpiece holding means extending from the opposite end of said helical lead bar for holding the workpiece thereon;
and a seal assembly mounted to said base structure proximately to the inlet of said pot broach to allow said workpiece holding means to laterally move and rotate therein while preventing any workpiece chips from passing therethrough.
7. A pot broaching machine as set forth in claim 5 wherein said helical nut assembly has a nut mounted therein having helical internal threads and wherein said helical lead bar has helical external threads cut along a portion thereof complimentary to the internal threads of said nut.
8. A pot broaching machine as set forth in claim 4 including a seal assembly mounted proximate to the inlet of said pot broach for sealing said rotational means from work-piece chips resulting from the workpiece being pushed and rotated through said pot broach.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81202077A | 1977-06-30 | 1977-06-30 | |
| US812,020 | 1977-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1082507A true CA1082507A (en) | 1980-07-29 |
Family
ID=25208243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA297,090A Expired CA1082507A (en) | 1977-06-30 | 1978-02-14 | Helical pot broaching machine |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1082507A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6085418A (en) * | 1997-08-27 | 2000-07-11 | Honda Giken Kogyo Kabushiki Kaisha | Apparatus for and method of sizing helical gears |
| CN109551044A (en) * | 2019-01-21 | 2019-04-02 | 常州润泽天成液压机械有限公司 | Double acting beam is vertical to move up broaching machine |
-
1978
- 1978-02-14 CA CA297,090A patent/CA1082507A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6085418A (en) * | 1997-08-27 | 2000-07-11 | Honda Giken Kogyo Kabushiki Kaisha | Apparatus for and method of sizing helical gears |
| CN109551044A (en) * | 2019-01-21 | 2019-04-02 | 常州润泽天成液压机械有限公司 | Double acting beam is vertical to move up broaching machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |