CN209918911U - Cutter for machining back of tractor shell - Google Patents
Cutter for machining back of tractor shell Download PDFInfo
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- CN209918911U CN209918911U CN201920314419.2U CN201920314419U CN209918911U CN 209918911 U CN209918911 U CN 209918911U CN 201920314419 U CN201920314419 U CN 201920314419U CN 209918911 U CN209918911 U CN 209918911U
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- cutter
- handle
- knife
- hole
- tool
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Abstract
A tool for back machining of tractor housings, comprising: the cutter comprises a cutter handle, a connecting part, a front cutter bar, a blade, a locking screw and a cutter head; a cutter handle is arranged at one end of the front cutter bar, a cutter head is arranged at the other end of the front cutter bar, and a connecting part is arranged between the cutter handle and the cutter head; the knife handle, the connecting part, the front knife bar and the knife head are coaxial; the blade is fastened on the cutter head through a locking screw; connecting portion are the cylinder, and the terminal surface that connecting portion are close to the one end of handle of a knife is the plane of perpendicular to handle of a knife axis, and the external diameter of connecting portion is greater than the external diameter of handle of a knife, and the handle of a knife center is equipped with the coolant liquid inlet hole, and the coolant liquid inlet hole one end is stretched out the handle of a knife left end, and the other end is located the tool bit left side. The cutter structure and the processing method are simple and practical, full-automatic processing is carried out on the horizontal processing center by adopting the clamp, and the process of turning the shell twice during processing on the rocker arm drilling machine is cancelled. The adaptability to the processing of the shell structure is good, the labor intensity of operators is reduced, and the working efficiency is improved.
Description
Technical Field
The utility model belongs to the machining field relates to a machining cutter, especially relates to a cutter that is used for processing of tractor casing screw via hole back.
Background
Tractors have been developed rapidly in our country in recent years as an important component of agricultural machinery. The tractor housing is one of the important basic components of a tractor. The front end surface and the rear end surface of the shell are respectively provided with a group of more than ten screw through holes (through holes for short), matched screws are adopted to be connected with an engine at the front end through the through holes from the back of the through holes at the front end surface of the shell during assembly, the back of the through holes at the rear end surface of the shell is connected with a rear transmission case shell at the rear end through the through holes, and the back of the through holes of the shell is required to be attached to the screw end surfaces; because of being limited by the product structure, the space of the back of the via hole of the shell is narrow, and a cutter is easy to interfere with the appearance of the shell during processing. At present, when the situation occurs, the following processing method is generally adopted:
the general processing technology comprises two procedures: 1. flattening the back surface of the through hole on the rear end surface of the shell 1; 2. and (5) facing the back of the through hole on the front end surface of the shell 1 flat. The machining is usually carried out by counterboring a radial drilling machine: the preceding process is with via hole processing completion back on the machining center, transports casing 1 to radial drill department, makes its rear end face up place on radial drill and compress tightly with casing 1 upset again, and the manual work removes the main shaft handle and stretches out cutter arbor 2 from the via hole, overlaps 3 covers of terminal surface countersink drill on cutter arbor 2 and rotatory 90, starts the equipment operation and artifical manual upwards gently carry the main shaft handle simultaneously, drives terminal surface countersink drill 3 and carries out anti-countersink terminal surface. After the machining is finished, manually rotating the end face countersink drill 3 in the opposite direction by 90 degrees and then withdrawing the end face countersink drill from the cutter bar 2, manually lifting the main shaft upwards to drive the cutter bar 2 to extend out of the through hole, finishing the machining of the back face of the through hole, and rotating the rocker arm to move the main shaft to the next through hole to start the above actions; after the hole system back of the surface is completely processed, the part shell 1 is turned over, the front end face is placed upwards and then is pressed tightly, and the hole system back of the surface is processed. For the processing of the small plane on the back surface of the through hole of the shell 1, the processing technology can ensure the processing quality within a certain application range. However, there are some disadvantages, mainly the following:
1. potential safety hazards exist: according to the safe operation regulation of the machine tool, the drilling machine with the gloves is not allowed, so that an operator needs to manually sleeve the end face countersink drill on the cutter bar and rotate 90 degrees in the machining process, the back of the bolt through hole and the space of the side face are narrow and small due to the limitation of a product structure, the manual tool mounting is difficult, and the operator is easily scratched by a cutter.
2. The work efficiency is low: in the single hole machining process, an operator needs to manually sleeve the end face countersink drill on the cutter bar twice and rotate 90 degrees, a group of dozens of screw through holes are formed in the front end face and the rear end face of the part respectively, the part needs to be overturned twice and clamped twice when a shell is machined, and the cutter is installed and removed dozens of times.
3. The labor intensity of an operator is high, because the height of a part is 600 ~ 700mm, when an operator processes the shell, the operator manually operates the main shaft handle in an upright state to enable the cutter bar to move downwards to the back of the through hole, the left hand in a stooping state sleeves the end face countersink drill on the cutter bar, the right hand still holds the main shaft handle, the operator processes the shell in the upright state, the left hand in the stooping state retreats the end face countersink drill from the cutter bar, the cutter bar in the upright state retreats from the through hole to complete the processing of the back of the through hole, the upright stooping action needs to be repeated for a plurality of times in the process, a group of more than ten through holes are respectively arranged on the front end face and the rear end face of the shell, and.
In conclusion, if can provide a cutter that is applied to processing of casing class part via hole back to the realization adopts horizontal machining center lathe automated processing via hole back with the cutter, it is this the utility model discloses a task place.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is existing just to overcome in the prior art defect and not enough to combine the in-service use requirement, provide a cutter that adopts horizontal machining center machine tool machining casing via hole back.
In order to achieve the above object, the present invention adopts the following technical solution to achieve the above object.
A tool for back machining of tractor housings, comprising: the cutter comprises a cutter handle, a connecting part, a front cutter bar, a blade, a locking screw and a cutter head; a cutter handle is arranged at one end of the front cutter bar, a cutter head is arranged at the other end of the front cutter bar, and a connecting part is arranged between the cutter handle and the cutter head; the knife handle, the connecting part, the front knife bar and the knife head are coaxial; the blade is fastened on the cutter head through a locking screw; connecting portion are the cylinder, and the terminal surface that connecting portion are close to the one end of handle of a knife is the plane of perpendicular to handle of a knife axis, and the external diameter of connecting portion is greater than the external diameter of handle of a knife, and the handle of a knife center is equipped with the coolant liquid inlet hole, and the coolant liquid inlet hole one end is stretched out the handle of a knife left end, and the other end is located the tool bit left side.
A cutter holder is arranged on the left upper side of the cutter head, a slotted hole is formed in the cutter holder, a blade fixed through a locking screw is arranged on the slotted hole, and the position of the blade can be adjusted through the slotted hole.
The blade is a standard C-shaped 80-degree diamond-shaped blade.
The tool holder is a cylinder, and the diameter size of the tool holder is phi 16 ~ phi 20 mm.
The utility model adopts the above technical scheme can reach following positive effect after: the cutter has simple structure, good processing adaptability to the shell structure, and is particularly suitable for popularization and application on equipment such as a processing center and the like; during machining, the cutter eccentrically enters the back of the through hole from the through hole, and within the allowable range of the size of the through hole, the cutter rotates 360 degrees by taking the central axis of the through hole as the center of a circle to perform full-automatic machining, so that the machining of the back of the through hole is realized. The complicated process and heavy labor of manual processing on the radial drilling machine are simplified, and potential safety hazards caused easily are avoided; the device meets the actual use requirement, is convenient to install and replace, and improves the production efficiency.
Drawings
FIG. 1 is a schematic illustration of the construction of a tractor housing;
FIG. 2 is a schematic view of a conventional tool machining the back of a tractor housing via hole;
FIG. 3 is a schematic structural view of the cutter for machining the back of the screw through hole of the tractor shell according to the present invention;
fig. 4 is the utility model discloses a cutter theory of operation schematic diagram for processing of tractor casing screw via hole back.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples. As shown in fig. 1-4: a cutter for machining the back of a through hole of a screw of a tractor shell comprises a cutter handle 4, a connecting part 5, a front cutter bar 6, a blade 7, a locking screw 8 and a cutter head 9; a connecting part 5 is arranged on the right side of the handle 4, a front cutter bar 6 is arranged on the right side of the connecting part 5, a cutter head 9 is arranged on the right side of the front cutter bar 6, and the blade 7 is positioned at one end, far away from the handle 4, of the cutter head 9; the knife handle 4, the connecting part 5, the front knife bar 6 and the knife head 9 are coaxial; the connecting part 5 is a cylinder, the end face of the connecting part 5, which is close to one end of the knife handle 4, is a plane vertical to the axis of the knife handle 4, and the outer diameter of the connecting part 5 is larger than that of the knife handle 4, so that the cost of the knife is reduced on the premise of ensuring the strength of the knife during processing; a cooling liquid inlet hole is formed in the cutter handle 4, one end of the cooling liquid inlet hole is located at the left end of the cutter handle 4, and the other end of the cooling liquid inlet hole is located above the cutter head 9; a cutter holder is arranged below the cutter head 9, a slotted hole is formed in the cutter holder, a blade 7 fixed through a locking screw 8 is arranged on the slotted hole, and the position of the blade 7 can be adjusted through the slotted hole; the blade 7 is a standard C-shaped 80-degree rhombic blade, and the width size of the blade is determined according to the comprehensive consideration of the size of the via hole and the size of the back surface;
the cutter handle 4 is a cylinder, the diameter size of the cutter handle is determined according to the size of an inner hole of a clamping cutter handle of a machine tool in a horizontal machining center, the cutter handle is generally designed to be universal phi 16 ~ phi 20mm, the cutter handle 4 is installed in an inner hole at one end of a main cutter handle, a screw perpendicular to the inner hole at one end of the main cutter handle is screwed at the side part of the main cutter handle to fix the cutter handle 4 in the main cutter handle, the other end of the main cutter handle is provided with a 7:24 taper outer diameter matched with the inner hole taper of the machine tool main shaft, a cutter and a machine tool main shaft are tightened through a pull nail to be connected with machining equipment, the size of the front cutter rod 6 is determined according to the size of a shell through hole and the size of a circular plane at the back of a machined through hole, and due to the fact that the diameter of the through hole of a part is small, the outer;
for better explanation of the invention, reference is made to fig. 4 of the drawings which form a part hereof, and in which: firstly, the diameter of a shell through hole is set to be phi D1, the diameter of a through hole back circular plane to be processed is set to be phi D2, the radius of the through hole back circular plane to be processed is set to be A1, the distance between the axis of a cutter and the axis of the through hole is set to be L, the distance between the maximum radius of a front cutter bar 6 and the radius of the through hole is set to be B, and the structural design idea of the reverse countersink is as: because the diameter dimension phi D2 of the circular plane on the back of the through hole to be machined is larger than the dimension (the diameter of the shell through hole) phi D1 at the entrance of the cutter, when the front cutter bar 6 moves to the diameter limit dimension of the through hole, namely the dimension B =0mm, and A1 is smaller than phi D2/2, the boring cannot be finished; therefore, the diameter of the front cutter bar 6 needs to be compatible with the dimensions L and B when the front cutter bar reaches the limit position, A1 is larger than phi D2/2 when the front cutter bar reaches the limit position, and the circular plane processing of the back of the through hole can be smoothly finished.
Examples
The tool is designed according to the comprehensive consideration of the size of the shell through hole and the size of the circular plane on the back surface of the processed through hole, then the tool is installed on a main shaft of a horizontal machining center machine tool, and parts are installed on a workbench for automatic machining.
In the example, the diameter phi D3 of the via holes on the rear end surface of the processed shell is phi 13mm, the diameter of the back circular plane of the processed shell is phi 22mm, the number n3=12 of the via holes requires that the back circular plane of the via holes is sunk flat; the diameter phi D4 of the through holes on the front end surface of the processed shell is phi 15mm, the diameter of the back circular plane of the processed shell is phi 24mm, the number n4=8 of the through holes requires that the back circular plane of the through holes is reamed flat.
The specific parameters of the cutter used in this example are as follows: processing a reverse countersinking boring cutter of the front end face: the length of the knife handle 4 is 50mm, the diameter of the knife handle 4 is phi 16mm, the distance from the axis of the front knife bar 6 to the knife tip of the blade 7 is 12.6mm, and the distance from the knife tip of the blade 7 to the outer diameter of the front knife bar 6 is 4.8 mm; tool for machining rear end face: the length of the knife handle 4 is 50mm, the diameter of the knife handle 4 is phi 16mm, the distance from the axis of the front knife bar 6 to the knife tip of the blade 7 is 14.6mm, and the distance from the knife tip of the blade 7 to the outer diameter of the front knife bar 6 is 4.8 mm.
In this embodiment, the method for processing the back surface of the through hole of the housing by using the tool includes the following steps:
1. because the front procedure (including the front end surface, the rear end surface, the via hole and the like) of the shell is processed on a horizontal processing center machine tool in a prone position, the processing of the back surface of the via hole is arranged in the procedure for processing;
2. firstly, a cutter is arranged in a tool magazine of a horizontal machining center machine tool;
3. the machine tool workbench rotates to drive the shell to rotate to 0 degree, and the machine tool picks the tool from the tool magazine through the tool arm and then installs the tool on the main shaft of the machine tool.
4. The rotating speed of the main shaft is set to be 800r/min, the feeding is 60 mm/min, the main shaft drives the cutter to rotate and rapidly move to a position 10mm in front of one through hole in the front end face of the shell, the main shaft drives the cutter to move along the horizontal direction, the cutter moves to a position where the distance between the cutter point and the side wall of the through hole is 0.5mm, the main shaft drives the cutter to move to the center of the through hole in the vertical direction, and the main shaft;
5. the main shaft drives a cutter to enter the position 2mm away from the back of the shell from the via hole, the cutter moves in the reverse direction along the horizontal direction and moves to the position 0.5mm away from the side wall of the via hole of a front cutter bar of the cutter, the main shaft drives the cutter to rotate, the reverse boring cutter retreats by 2mm, and the reverse boring cutter rotates by 360 degrees by taking the central axis of the via hole as the center of a circle to perform reverse boring processing;
6. after the back of the via hole is machined, the cutter advances by 2mm, the main shaft drives the cutter to stop in a directional mode, the main shaft drives the cutter to move in the horizontal direction, and after the cutter point moves to a position 0.3 ~ 0.5.5 mm away from the side wall of the via hole, the cutter retreats to a position 10mm in front of the via hole.
7. The main shaft drives the cutter to rotate, the cutter is rapidly moved to a position 10mm in front of another through hole on the front end surface of the shell, and the processing process of the back surfaces of all the through holes on the front end surface of the shell can be finished by repeating the steps;
8. and (3) rotating the machine tool workbench to drive the shell to rotate the rear end face of the shell to 0 degree, setting the rotating speed of the main shaft to 870 r/min, feeding the main shaft for 60 mm/min, and repeating the step 4 ~ 7 to complete the processing of the back faces of all the through holes on the rear end face of the shell.
In a word, a cutter is designed according to the requirements of the diameter size of the through hole and the back surface of the processed shell, the cutter eccentrically enters the back surface of the through hole from the through hole during processing, and the cutter rotates 360 degrees by taking the central axis of the through hole as the center of a circle within the allowable range of the size of the through hole to perform full-automatic processing so as to realize processing of the back surface of the through hole. The complicated process and heavy labor of manual processing on the radial drilling machine are simplified, and potential safety hazards caused easily are avoided; the device meets the actual use requirement, is convenient to install and replace, and improves the production efficiency.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. All changes, modifications, equivalents and the like which come within the spirit of the invention are intended to be embraced therein.
Claims (4)
1. A tool for back machining of tractor housings, comprising: the tool comprises a tool handle (4), a connecting part (5), a front tool bar (6), a blade (7), a locking screw (8) and a tool bit (9); the method is characterized in that: a cutter handle (4) is arranged at one end of the front cutter bar (6), a cutter head (9) is arranged at the other end of the front cutter bar (6), and a connecting part (5) is arranged between the cutter handle (4) and the cutter head (9); the knife handle (4), the connecting part (5), the front knife bar (6) and the knife head (9) are coaxial; the blade (7) is fastened on the cutter head (9) through a locking screw (8); connecting portion (5) are the cylinder, and the terminal surface that connecting portion (5) are close to the one end of handle of a knife (4) is the plane of perpendicular to handle of a knife (4) axis, and the external diameter of connecting portion (5) is greater than the external diameter of handle of a knife (4), and handle of a knife (4) center is equipped with the coolant liquid inlet hole, and the coolant liquid inlet hole one end is stretched out handle of a knife (4) left end, and the other end is located tool bit (9) left side.
2. The tool for machining the back of the tractor housing as claimed in claim 1, wherein: a cutter holder is arranged on the upper left side of the cutter head (9), a slotted hole is formed in the cutter holder, a blade (7) fixed through a locking screw (8) is arranged on the slotted hole, and the position of the blade (7) can be adjusted through the slotted hole.
3. The tool for machining the back of the tractor housing as claimed in claim 1, wherein: the blade (7) is a standard C-shaped 80-degree diamond-shaped blade.
4. The cutter for machining the back of the tractor shell as claimed in claim 1, wherein the cutter handle (4) is a cylinder with the diameter size of phi 16 ~ phi 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920314419.2U CN209918911U (en) | 2019-03-13 | 2019-03-13 | Cutter for machining back of tractor shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920314419.2U CN209918911U (en) | 2019-03-13 | 2019-03-13 | Cutter for machining back of tractor shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209918911U true CN209918911U (en) | 2020-01-10 |
Family
ID=69069789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920314419.2U Expired - Fee Related CN209918911U (en) | 2019-03-13 | 2019-03-13 | Cutter for machining back of tractor shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209918911U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848448A (en) * | 2019-03-13 | 2019-06-07 | 第一拖拉机股份有限公司 | A kind of cutter and processing method for the processing of tractor back side of shell |
-
2019
- 2019-03-13 CN CN201920314419.2U patent/CN209918911U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848448A (en) * | 2019-03-13 | 2019-06-07 | 第一拖拉机股份有限公司 | A kind of cutter and processing method for the processing of tractor back side of shell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200110 Termination date: 20210313 |
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| CF01 | Termination of patent right due to non-payment of annual fee |