CN216179610U - Machine tool and accurate grinding cam clamp thereof - Google Patents
Machine tool and accurate grinding cam clamp thereof Download PDFInfo
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- CN216179610U CN216179610U CN202122506578.2U CN202122506578U CN216179610U CN 216179610 U CN216179610 U CN 216179610U CN 202122506578 U CN202122506578 U CN 202122506578U CN 216179610 U CN216179610 U CN 216179610U
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Abstract
The application discloses lathe and fine grinding cam anchor clamps thereof, wherein fine grinding cam anchor clamps include: the shifting fork positioning seat is arranged on the end surface of the machine tool spindle, and the end part of the shifting fork positioning seat is provided with a boss; the chicken heart clamp is used for clamping a workpiece and is provided with a sleeve hole matched with the boss, the sleeve hole is sleeved on the boss, the axial direction of the sleeve hole is parallel to the axial direction of the machine tool spindle, and the two side surfaces of the chicken heart clamp, which are positioned in the sleeve hole, are provided with threaded holes communicated with the sleeve hole; the center clamp is provided with a workpiece and is aligned and clamped between the fixed center and the clamping center; and the positioning screw is connected in the threaded hole, and the tail end of the positioning screw is propped against the side surface of the boss. The accurate grinding cam clamp can improve the machining precision of workpieces, reduce the abrasion of the heart clamp positioning surface, ensure that two heart clamps can be simultaneously machined, and improve the utilization rate of a machine tool. Another object of the present application is to provide a machine tool comprising the above-mentioned finish grinding cam jig, which is advantageous as the same as the finish grinding cam jig.
Description
Technical Field
The application relates to the field of machining industry, in particular to a fine grinding cam clamp. In addition, the application still relates to a lathe including above-mentioned accurate grinding cam anchor clamps.
Background
The structure of a typical refining cam clamp in the prior art is shown in fig. 1, and the specific using method is as follows: the workpiece 4 is arranged in the mounting hole of the heart-shaped clamp 3, and the heart-shaped clamp 3 is locked by the locking bolt 10; aligning the chicken heart clamp 3 provided with the workpiece 4 with the fixed center 9, arranging the chicken heart clamp into a clamping groove between the shifting fork positioning seats 2, and placing the other end of the chicken heart clamp on the bracket 11; adjusting the position of the bracket 11 to enable the gap between the bracket 11 and the supported position of the workpiece to be 1.5-2 mm; starting the machine tool, pushing a clamping center 5 to clamp a workpiece 4 by a hydraulic mechanism, and rotating a main shaft 1 of the machine tool; the machine tool spindle 1 rotates to drive the shifting fork positioning seat 2 to rotate, and the positioning screw 8 on the shifting fork positioning seat 2 pushes the positioning surface 7 to rotate along with the machine tool spindle 1 until the machining is finished.
However, the sizes of the positioning surfaces 7 of the heart-shaped clamps 3 are not consistent in thickness in the manufacturing process, so that the contact positions of the positioning surfaces 7 and the positioning screws 8 are deflected, the consistency of the angles of the positioning holes of the machined workpieces and the top points of the cams is poor, or the two heart-shaped clamps are debugged and machined at the same time, and the angles of the workpieces machined by the two heart-shaped clamps are inconsistent, so that the angles are not qualified.
In addition, in the processing process, the positioning screw 8 continuously applies pressure to the positioning surface 7 of the heart-shaped clamp 3, the abrasion of the positioning surface is large, if two heart-shaped clamps are adopted, the abrasion areas and the depths of the two heart-shaped clamp positioning surfaces 7 are different, the mutual positioning accuracy is inaccurate, and the positioning hole and the cam vertex angle are difficult to guarantee. Therefore, only one heart-shaped clamp 3 can be used for debugging and processing to ensure the angle, so that the utilization rate of the machine tool is low, the heart-shaped clamp 3 with the workpiece 4 needs to be taken down from the machine tool after the workpiece is processed, the locking nut of the locking bolt 10 is loosened, the workpiece 4 is taken down, and the workpiece to be processed is mounted again, and the process needs about 15 seconds, so that the productivity is wasted, and the labor hour and cost are increased.
In summary, how to effectively solve the problems of inconsistent angles of two heart-shaped clamps for processing workpieces, low utilization rate of a machine tool and the like in the processing process is a problem which needs to be solved by technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a fine grinding cam clamp which can improve the machining precision of a workpiece and ensure the consistency of the workpiece; the abrasion of the positioning surfaces of the heart clamps is reduced, the two heart clamps can be simultaneously processed, and the utilization rate of a machine tool is improved; another object of the present application is to provide a machine tool comprising the above-mentioned finish grinding cam jig, which is advantageous as the same as the finish grinding cam jig.
In order to solve the technical problem, the application provides the following technical scheme:
a finish grinding cam jig comprising:
the shifting fork positioning seat is arranged on the end surface of the machine tool spindle, and the end part of the shifting fork positioning seat is provided with a boss;
the chicken heart clamp is used for clamping a workpiece and is provided with a sleeve hole matched with the boss, the sleeve hole is sleeved on the boss, the axial direction of the sleeve hole is parallel to the axial direction of a machine tool spindle, and two side faces of the chicken heart clamp, which are positioned in the sleeve hole, are provided with threaded holes communicated with the sleeve hole;
the center clamp is provided with a workpiece and is aligned and clamped between the fixed center and the clamping center;
and the positioning screw is connected in the threaded hole, and the tail end of the positioning screw is propped against the side surface of the boss.
Preferably, the trepanning is the slot hole, the boss is the rectangle head.
Preferably, the gap between the boss of the shifting fork positioning seat and the trepanning of the heart clip is 0.1-0.2 mm.
Preferably, the side surface of the boss contacting with the positioning screw is a positioning surface.
Preferably, the opening of the heart-shaped clamp is fastened by a locking bolt.
Preferably, the shifting fork positioning seat is installed on the end face of the machine tool spindle through a locking screw.
The application still provides a lathe, including the lathe body and install in the accurate grinding cam anchor clamps of lathe body, accurate grinding cam anchor clamps specifically are above-mentioned arbitrary accurate grinding cam anchor clamps.
The application provides a correct grinding cam anchor clamps, including shifting fork positioning seat, set screw, chicken heart clamp fixed tip and clamping tip. The shifting fork positioning seat is specifically an L-shaped seat, and the vertical plate is attached to the end face of the machine tool spindle and fixedly installed on the end face of the machine tool spindle. The transverse plate is parallel to the axial direction of the machine tool spindle, a protruding part is arranged at the end part of the transverse plate to form a boss, namely, the section of the boss is smaller than that of the transverse plate in the direction vertical to the axial direction of the machine tool spindle, and a step surface is formed at the joint of the transverse plate and the boss. The middle part of the heart-shaped clamp is provided with a mounting hole, and one end of a workpiece is clamped in the mounting hole. The heart presss from both sides and has seted up the trepanning in the outside of mounting hole, and the shape of trepanning, size and the shape of the boss of shifting fork positioning seat, the trepanning matches with the boss, and the trepanning just suit on the boss.
The fixed center and the clamping center are matched for use, the fixed center is fixed at the center of a main shaft of a machine tool, a workpiece is arranged on the heart clamp, the heart clamp provided with the workpiece is aligned to the fixed center and sleeved on a boss of the shifting fork positioning seat, and the back of the heart clamp is tightly attached to the step face of the shifting fork positioning seat. The axial direction of the boss and the sleeve hole is parallel to the axial direction of the machine tool spindle, the heart clamp provided with the workpiece is hung on the shifting fork positioning seat, and the shifting fork positioning seat has a supporting effect on the heart clamp provided with the workpiece. The heart presss from both sides and all has the screw hole that communicates the trepanning at the both sides face that is located the trepanning, and set screw connects in the screw hole and its terminal top in the side of boss, will shift fork positioning seat and heart and press from both sides the location locking.
And starting the machine tool, pushing the clamping center to clamp the other end of the workpiece by the hydraulic mechanism, and rotating the main shaft of the machine tool. The machine tool spindle rotates to drive the shifting fork positioning seat to rotate, and the positioning screw on the shifting fork positioning seat pushes the positioning surface to rotate along with the machine tool spindle until the machining is finished.
According to the accurate grinding cam clamp, the sleeve hole of the heart clamp is sleeved on the boss of the shifting fork positioning seat, the boss of the shifting fork positioning seat in the vertical direction supports the heart clamp, a workpiece can be clamped, the heart clamp cannot fall off, other parts are not needed to support or support the heart clamp and the workpiece in the vertical direction, the bracket structure is simplified, and the installation and debugging time of different workpieces on the bracket in the debugging process can be greatly reduced; the trepanning of chicken heart clamp and the boss connected mode of shifting fork positioning seat are unique, and connection accuracy is higher, guarantees that the centre bore of the work piece other end and the tight top of clamp are in same position, and the tight top of clamp can withstand the work piece smoothly and press from both sides tightly, and labour saving and time saving improves work piece machining precision, promotes output in class by a wide margin, guarantees work piece uniformity, stability.
The application still provides a lathe, includes the lathe body and installs in the accurate grinding cam anchor clamps of lathe body, and this accurate grinding cam anchor clamps specifically are any kind of above-mentioned accurate grinding cam anchor clamps. Due to the technical effects of the fine grinding cam clamp, the machine tool with the fine grinding cam clamp also has corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Figure 1 is a diagram of a typical prior art finish grinding cam jig configuration;
fig. 2 is a schematic structural view of a refining cam jig according to an embodiment of the present application.
The drawings are numbered as follows:
the machine tool comprises a machine tool spindle 1, a shifting fork positioning seat 2, a heart clamp 3, a workpiece 4, a clamping center 5, a locking screw 6, a positioning surface 7, a positioning screw 8, a fixing center 9, a locking bolt 10 and a bracket 11.
Detailed Description
The core of the application is to provide a fine grinding cam clamp which can improve the processing precision of workpieces and ensure the consistency of the workpieces; the abrasion of the positioning surfaces of the heart clamps is reduced, the two heart clamps can be simultaneously processed, and the utilization rate of a machine tool is improved; another core of the present application is to provide a machine tool comprising the above-mentioned finish grinding cam jig, which is the same in advantageous effects as the finish grinding cam jig.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
Referring to fig. 2, fig. 2 is a schematic structural view of a refining cam jig according to an embodiment of the present application.
In one embodiment, the present application provides a finish grinding cam jig, mounted on a machine tool, comprising:
the shifting fork positioning seat 2 is arranged on the end surface of the machine tool main shaft 1, and a boss is arranged at the end part of the shifting fork positioning seat 2;
the chicken heart clamp 3 is used for clamping a workpiece 4, a sleeve hole matched with the boss is formed in the chicken heart clamp 3, the sleeve hole is sleeved on the boss, the axial direction of the sleeve hole is parallel to the axial direction of the machine tool spindle 1, and threaded holes communicated with the sleeve hole are formed in two side faces of the chicken heart clamp 3, which are located in the sleeve hole;
the center clamp 3 is provided with a workpiece 4 and is aligned and clamped between the fixed center 9 and the clamping center 5;
and the positioning screw 8 is connected in the threaded hole, and the tail end of the positioning screw 8 is propped against the side surface of the boss.
In the structure, the fine grinding cam clamp comprises a shifting fork positioning seat 2, a positioning screw 8, a heart clamp 3, a fixing tip 9 and a clamping tip 5.
The shifting fork positioning seat 2 is specifically an L-shaped seat, and a vertical plate is attached to the end face of the machine tool spindle 1 and fixedly installed on the end face of the machine tool spindle 1. The transverse plate is parallel to the axial direction of the machine tool spindle 1, a protruding part is arranged at the end part of the transverse plate to form a boss, namely, the cross section of the boss is smaller than that of the transverse plate in the direction vertical to the axial direction of the machine tool spindle 1, and a step surface is formed at the connecting part of the transverse plate and the boss.
The middle part of the heart-shaped clamp 3 is provided with a mounting hole, and one end of the workpiece 4 is clamped in the mounting hole. The heart presss from both sides 3 and has seted up the trepanning in the outside of mounting hole, and the shape of trepanning, size and the shape of the boss of shifting fork positioning seat 2, size are equivalent, and the trepanning matches with the boss, and the trepanning just suit on the boss.
The fixed center 9 and the clamping center 5 are used in a matched mode, the fixed center 9 is fixed at the center of the machine tool spindle 1, the workpiece 4 is installed on the heart clamp 3, the heart clamp 3 with the workpiece 4 is aligned to the fixed center 9 and sleeved on the boss of the shifting fork positioning seat 2, the sleeve hole of the heart clamp 3 is sleeved on the boss, and the back face of the heart clamp 3 is tightly attached to the step face of the shifting fork positioning seat 2. The axial direction of the boss and the sleeve hole is parallel to the axial direction of the machine tool spindle 1, the heart clamp 3 provided with the workpiece 4 is hung on the shifting fork positioning seat 2, and the shifting fork positioning seat 2 has a supporting function on the heart clamp 3 provided with the workpiece 4.
The heart clamp 3 is provided with threaded holes communicated with the sleeve holes on two side faces of the sleeve hole, the positioning screw 8 is connected in the threaded holes, the tail end of the positioning screw is propped against the side face of the boss, and the shifting fork positioning seat 2 and the heart clamp 3 are positioned and locked.
And starting the machine tool, pushing the clamping center 5 by the hydraulic mechanism to clamp the other end of the workpiece 4, and rotating the main shaft 1 of the machine tool. The machine tool spindle 1 rotates to drive the shifting fork positioning seat 2 to rotate, and the positioning screw 8 on the shifting fork positioning seat 2 pushes the positioning surface 7 to rotate along with the machine tool spindle 1 until the machining is finished.
According to the accurate grinding cam clamp, the sleeve hole of the heart clamp 3 is sleeved on the boss of the shifting fork positioning seat 2, the boss of the shifting fork positioning seat 2 in the vertical direction has a supporting effect on the heart clamp 3, the workpiece 4 and the heart clamp 3 can be clamped and cannot fall off, other parts are not needed to support or lift the heart clamp 3 and the workpiece 4 in the vertical direction, the bracket structure is simplified, and the mounting and debugging time of different workpieces 4 on a bracket in the debugging process can be greatly reduced; the trepanning of chicken heart clamp 3 and the boss connected mode of shifting fork positioning seat 2 are unique, and connection accuracy is higher, guarantees that the centre bore of the 4 other ends of work pieces and clamping center 5 are in same position, and clamping center 5 can withstand work pieces 4 and press from both sides tightly smoothly, and labour saving and time saving improves 4 machining precision of work pieces, promotes output in class by a wide margin, guarantees 4 uniformity of work pieces, stability.
On the basis of the specific embodiment, a person skilled in the art can change the fine grinding cam clamp according to different specific occasions, wherein the sleeve hole is a rectangular hole, the boss is a rectangular head, the rectangular hole is sleeved in the rectangular head, the connection mode is unique, and accurate and quick connection can be realized; after the connection, the rectangular hole cannot rotate around the rectangular head, the relative positions of the heart clamp 3 and the shifting fork positioning seat 2 are determined, the central hole at the other end of the workpiece 4 and the clamping center 5 are ensured to be at the same position, and the clamping center 55 can smoothly support and clamp the workpiece 4.
Further optimize above-mentioned technical scheme, technical personnel in the field can carry out a plurality of changes to above-mentioned embodiment according to the difference of specific occasion, and the boss of shifting fork positioning seat 2 and the trepanning clearance that the heart pressed from both sides 3 are arbitrary value between 0.1mm ~ 0.2mm, including endpoint value, for example for 0.15mm, the boss of shifting fork positioning seat 2 and the clearance of the trepanning of heart pressed from both sides 3 are moderate, both make things convenient for the connection of them, can guarantee again that the clearance is less, and the boss blocks work piece 4 and heart and presss from both sides 3, prevents that the too big lead to rocking of clearance from dropping.
On the basis of the above embodiments, the side surface of the boss contacting with the set screw 8 is the positioning surface 7, and the positioning surface 7 of the fork positioning seat 2 is fixed. In the processing, the positioning screws 8 on various types of the heart clamps 3 are positioned, and no matter what abrasion degree the positioning surface 7 is, the workpiece 4 to be processed can be adjusted to be qualified through the positioning screws 8 on the heart clamps 3. The abrasion of the positioning surface 7 of the heart-shaped clamp 3 is reduced, the two heart-shaped clamps 3 can be simultaneously machined, the other heart-shaped clamp 3 is in the process of assembling when the machine tool is used for machining, and after the workpiece 4 machined on the machine tool is finished, the workpiece 4 to be machined can be quickly assembled on the machine tool for machining, so that the stand-by time of the machine tool is reduced, the utilization rate of the machine tool is improved, the on-duty yield is improved, and the machining cost is reduced; meanwhile, the angles of the positioning holes of the workpieces 4 processed by the two heart-shaped clamps 3 and the top point of the cam can be kept consistent by finely adjusting the positioning screws 8.
In another more reliable embodiment, on the basis of any one of the above embodiments, an opening is formed in one side of the heart-shaped clamp 3, and the opening is communicated with the mounting hole of the heart-shaped clamp 3, so that the workpiece 4 can be conveniently and rapidly mounted. The heart presss from both sides 3 at the open-ended both sides through-hole, and the through-hole is mutually perpendicular with the open-ended axis, and after work piece 4 installed into the mounting hole of heart presss from both sides 3, locking bolt 10 connects and locks the opening in the through-hole, prevents that work piece 4 from dropping from the heart presss from both sides 3.
In another more reliable embodiment, on the basis of any one of the above embodiments, the vertical plate of the fork positioning seat 2 and the end surface of the machine tool spindle 1 are both provided with threaded holes, and the locking screw 6 sequentially penetrates through the vertical plate of the fork positioning seat 2 and the threaded hole of the machine tool spindle 1 to mount the fork positioning seat 2 on the end surface of the machine tool spindle 1. The shifting fork positioning seat 2 is installed on the end face of the machine tool spindle 1 through a locking screw 6, is convenient to connect and is easy to detach.
Based on the fine grinding cam clamp provided in the above embodiment, the present application also provides a machine tool, which includes a machine tool body and a fine grinding cam clamp installed on the machine tool body, wherein the fine grinding cam clamp is any one of the fine grinding cam clamps in the above embodiments. Since the machine tool adopts the finish grinding cam clamp in the above embodiment, please refer to the above embodiment for the beneficial effect of the machine tool. For the structure of other parts of the machine tool, reference is made to the prior art, and details are not repeated herein.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The machine tool and the finish grinding cam clamp thereof provided by the application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a fine grinding cam anchor clamps installs on the lathe which characterized in that includes:
the shifting fork positioning seat (2) is arranged on the end face of the machine tool spindle (1), and a boss is arranged at the end part of the shifting fork positioning seat (2);
the chicken heart clamp (3) is used for clamping a workpiece (4), a sleeve hole matched with the boss is formed in the chicken heart clamp (3), the sleeve hole is sleeved on the boss, the axial direction of the sleeve hole is parallel to the axial direction of the machine tool spindle (1), and threaded holes communicated with the sleeve hole are formed in two side faces of the chicken heart clamp (3) located in the sleeve hole;
the fixture comprises a fixed center (9) and a clamping center (5), wherein the fixed center (9) is fixed at the center of a machine tool spindle (1), and a heart clamp (3) provided with a workpiece (4) is aligned and clamped between the fixed center (9) and the clamping center (5);
and the positioning screw (8) is connected in the threaded hole, and the tail end of the positioning screw (8) is propped against the side surface of the boss.
2. The finish grinding cam jig of claim 1, wherein the trepan bore is a rectangular bore and the boss is a rectangular head.
3. The refining cam clamp according to claim 2, characterized in that the gap between the boss of the fork positioning seat (2) and the trepan boring of the heart-shaped clamp (3) is 0.1 mm-0.2 mm.
4. Refining cam jig according to claim 1, characterized in that the side of the boss in contact with the set screw (8) is the setting surface (7).
5. Refining cam jig according to any of claims 1-4, characterized in that the opening of the heart-piece clamp (3) is fastened by means of a locking bolt (10).
6. Refining cam clamp according to any of claims 1-4, characterized in that the yoke positioning seat (2) is mounted on the end face of the machine spindle (1) by means of a locking screw (6).
7. A machine tool comprising a machine tool body and a finish grinding cam jig mounted to the machine tool body, wherein the finish grinding cam jig is particularly a finish grinding cam jig according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122506578.2U CN216179610U (en) | 2021-10-18 | 2021-10-18 | Machine tool and accurate grinding cam clamp thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122506578.2U CN216179610U (en) | 2021-10-18 | 2021-10-18 | Machine tool and accurate grinding cam clamp thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216179610U true CN216179610U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122506578.2U Active CN216179610U (en) | 2021-10-18 | 2021-10-18 | Machine tool and accurate grinding cam clamp thereof |
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|---|---|
| CN (1) | CN216179610U (en) |
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2021
- 2021-10-18 CN CN202122506578.2U patent/CN216179610U/en active Active
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