CN213858571U

CN213858571U - Positioning tool for grinding of camshaft

Info

Publication number: CN213858571U
Application number: CN202022813214.4U
Authority: CN
Inventors: 杨卫国; 朱海清
Original assignee: Jingjiang Guomao Auto Parts Manufacturing Co ltd
Current assignee: Jingjiang Guomao Auto Parts Manufacturing Co ltd
Priority date: 2020-11-28
Filing date: 2020-11-28
Publication date: 2021-08-03
Anticipated expiration: 2030-11-28

Abstract

The application relates to a positioning tool for grinding a camshaft, which comprises a supporting center and a mounting disc, wherein the supporting center can be abutted against the inner side wall of a central hole at one end of a spline for arranging the camshaft, and the mounting disc can be fixedly connected with the periphery of a machine tool; the supporting center can be rotatably connected with the machine tool around the axis of the supporting center; the mounting disc is provided with a mounting center which can be abutted against the inner side wall of the central hole at one end of the cam shaft, which is provided with the cam; the mounting disc is provided with a butt joint block capable of being abutted against the outer peripheral wall of the cam. The mounting center is matched with the supporting center to support the camshaft, and the abutting block abuts against the cam to drive the camshaft to rotate along with the mounting disc. The frock is only butt joint piece and cam contact, and the area of contact of the camshaft of frock is little, and this application has the effect that reduces the wearing and tearing of frock to the camshaft, packing camshaft outward appearance and size precision.

Description

Positioning tool for grinding of camshaft

Technical Field

The application relates to the field of camshaft machining tools, in particular to a camshaft grinding and positioning tool.

Background

The camshaft is a part for automobile braking, and before assembly, the part where the camshaft is matched with the bearing needs to be ground to ensure that the camshaft can be assembled and combined with the bearing.

A camshaft, refer to fig. 1, which comprises a shaft lever and a cam group positioned at one end of the shaft lever, wherein the cam group comprises two cams which are arranged along the center of the end wall of the shaft lever in a centrosymmetric manner; a spline is arranged at one end of the shaft lever, which is far away from the cam group; the shaft lever is provided with a mounting part for mounting the bearing between the cam group and the spline. Before the camshaft leaves the factory or before the camshaft is assembled with the bearing, the installation part needs to be ground, so that the size of the installation part meets the assembly requirement.

In view of the above-mentioned related art, the inventor believes that during grinding, the camshaft must rotate around its own axis, and the rotation direction of the camshaft should be opposite to the rotation direction of the grinding wheel used for grinding. Because the one end of axostylus axostyle is provided with the cam group, and the axostylus axostyle other end is for being provided with the spline, when using anchor clamps such as chuck clamping camshaft, makes the surface of cam or makes the spline produce wearing and tearing easily, influences the outward appearance and the dimensional accuracy of product, so wait to improve.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem of easy emergence wearing and tearing during camshaft abrasive machining clamping, this application provides a camshaft positioning tool for abrasive machining.

The application provides a camshaft positioning tool for abrasive machining adopts following technical scheme:

a positioning tool for grinding a camshaft comprises a supporting center and a mounting disc, wherein the supporting center can be abutted against the inner side wall of a central hole at one end, provided with a spline, of the camshaft, and the mounting disc can be fixedly connected with a machine tool spindle; the supporting center can be rotatably connected with the machining bed around the axis of the supporting center; the mounting disc is provided with a mounting center which can be abutted against the inner side wall of the central hole at one end of the cam shaft, which is provided with the cam; the mounting disc is provided with a butt joint block capable of being abutted against the outer peripheral wall of the cam.

By adopting the technical scheme, the supporting center is arranged on the tailstock of the machine tool, and the mounting disc is fixedly connected with the main shaft of the machine tool. When the camshaft is ground, the inner side wall of the central hole at the end, provided with the spline, of the camshaft is abutted against the supporting top tip, and the inner side wall of the central hole at the end, provided with the cam, of the camshaft is abutted against the mounting top tip; manually rotating the cam shaft along the direction opposite to the rotating direction of the machine tool spindle until the outer peripheral wall of the cam is abutted against the abutting block; starting equipment, the lathe main shaft drives the mounting disc and rotates, and the butt piece rotates and drives the camshaft rotation along with the mounting disc, and the lathe emery wheel contacts and grinds camshaft axostylus axostyle periphery wall with camshaft axostylus axostyle periphery wall to the realization is to the processing of camshaft. The mounting center is matched with the supporting center to support the camshaft; the butt joint piece rotates and drives the camshaft rotation along with the mounting disc with cam periphery wall butt. Only the contact of butt joint piece and cam periphery wall has reduced the wearing and tearing of frock to the camshaft, has guaranteed the outward appearance and the size precision of camshaft. When the camshaft is clamped or disassembled, only the tailstock needs to be moved, and the operation is simple and convenient.

Optionally, the side wall of the abutting block abutting against the cam is provided with an arc-shaped surface.

By adopting the technical scheme, after the camshaft and the machine tool are installed, when the machine tool is started, the abutting block impacts the peripheral wall of the cam; the arcwall face contacts with the cam periphery wall, prevents the sharp limit and the cam contact of butt joint piece, can reduce the butt joint piece and strike and wearing and tearing to the cam periphery wall, guarantees the quality of camshaft.

Optionally, the abutting block is detachably connected with the mounting plate.

Through adopting above-mentioned technical scheme, the butt piece can be dismantled with the mounting disc and be connected, can reduce the volume of mounting disc with butt piece and mounting disc separation, the accomodating and depositing of the mounting disc of being convenient for.

Optionally, the side wall of the mounting disc provided with the abutting block is provided with an embedding groove along the axial direction of the mounting disc, and one end of the abutting block can be matched with the embedding groove in an inserting manner.

Through adopting above-mentioned technical scheme, butt piece and embedding groove cooperation, the installation and the fixed of butt piece and embedding groove of being convenient for. The embedding groove has a positioning effect on the abutting block, and the arc-shaped surface is conveniently positioned, so that the arc-shaped surface is ensured to be in contact fit with the peripheral wall of the cam.

Optionally, the embedding groove is provided with a plurality of grooves along the radial direction of the mounting disc.

Through adopting above-mentioned technical scheme, according to the size of cam and the size of the camshaft body of rod diameter, the relative and the mounting disc central distance of butt block of operating personnel to with the cooperation of butt block and the embedded groove of corresponding position and fixed, improved mounting disc and not unidimensional camshaft complex suitability.

Optionally, each embedding groove is respectively and evenly provided with at least two along the mounting disc circumference in proper order, the butt joint quantity correspondence is provided with at least two.

Through adopting above-mentioned technical scheme, the embedding groove evenly sets up along mounting disc circumference to evenly set up two at least butt pieces along mounting disc circumference, can reduce the skew degree of mounting disc focus and rotation center. Because an assembly gap exists between the machine tool spindle and the machine tool power component; when the mounting disc rotated, if the mounting disc focus deviated the rotation center, then can lead to the mounting disc to take place the vibration because of rotatory unbalance, aroused the camshaft easily and take place vibrations in course of working to make the camshaft take place radial run-out at its by the grinding position, influence machining precision. The embedding groove and the abutting block are uniformly distributed along the axial direction of the mounting disc, so that the dynamic balance of the mounting disc can be guaranteed, the vibration of the mounting disc during rotation is reduced, and the machining precision of the camshaft is higher.

Optionally, the side wall of the mounting disc provided with the abutting block is provided with a mounting groove along the axial direction of the mounting center, and one end of the mounting center facing the direction of the mounting disc is in inserting fit with the mounting groove.

Through adopting above-mentioned technical scheme, the top and the mounting groove cooperation of installation realize installing top and being connected with dismantling of mounting disc, are convenient for with installing top and the mounting disc separation, reduce the volume of mounting disc, make things convenient for accomodating and depositing of frock.

Optionally, a sliding groove is formed in the outer peripheral wall of one end, inserted into the mounting groove, of the mounting center along the radial direction of the mounting center, a fixing rod is connected to the inner side wall of the sliding groove in a sliding manner, and a fixing groove into which one end of the fixing rod can be inserted is formed in the inner side wall of the mounting groove; an elastic part capable of driving the fixed rod to move towards the direction of the fixed groove is arranged between the fixed rod and the mounting tip; the peripheral wall of the mounting tip, which is positioned outside the mounting groove, is provided with an operating rod connected with the fixed rod in a sliding manner along the radial direction of the mounting tip.

Through adopting above-mentioned technical scheme, dead lever and fixed slot cooperation, it is fixed with the mounting disc to be convenient for install top, prevents that the installation top from breaking away from with the mounting disc and dropping because operating personnel bumps by mistake to it damages to touch with lathe or ground to lead to the installation top. The operating rod is stirred, and the operating rod can drive the fixed rod to move, so that the fixed rod is separated from the fixed groove, and the operation is convenient; the elastic piece can drive the fixed rod to abut against the bottom wall of the fixed groove, so that the fixed rod is prevented from being separated from the fixed groove.

Optionally, a positioning groove communicated with the mounting groove is respectively arranged in the side wall of each fixing groove facing the bottom wall direction of the mounting groove in a penetrating manner along the axial direction of the mounting groove, and one end of the fixing rod can be connected with the inner side wall of the positioning groove in a sliding manner; the depth of the positioning groove is smaller than that of the fixing groove.

Through adopting above-mentioned technical scheme, the dead lever cooperates with the constant head tank, and the dead lever of being convenient for aligns with the fixed slot, and the installation top is more convenient.

Optionally, the fixed rod and the operating rod are respectively and sequentially provided with at least two fixing grooves along the circumferential direction of the mounting tip, and the two fixing grooves are in one-to-one correspondence with the fixed rod.

Through adopting above-mentioned technical scheme, fixed slot, dead lever, action bars are equallyd divide and are evenly provided with a plurality ofly along the top circumference of installation respectively, can reduce the skew degree of mounting disc focus rather than rotation center to guarantee the dynamic balance nature of mounting disc.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the mounting center is matched with the supporting center to support the camshaft, the abutting block can abut against the cam and drive the camshaft to rotate along with the main shaft of the lathe, only the cam of the camshaft is in contact with the abutting block, the tool is less in abrasion to the camshaft, and the camshaft is more convenient to match with the tool;

2. the position of the abutting block can be adjusted along the radial direction of the mounting disc, so that the tool can be conveniently matched with camshafts of different sizes;

3. the installation is top and the mounting groove cooperation, is convenient for install top and the dismantled being connected of mounting disc, makes things convenient for accomodating and depositing of mounting disc.

Drawings

Fig. 1 is a schematic structural view of a camshaft in the related art.

FIG. 2 is a schematic overall structure diagram of a positioning tool for camshaft grinding according to an embodiment of the present application.

Fig. 3 is an exploded view for showing a connection structure of the abutment block and the mounting plate.

Fig. 4 is a schematic cross-sectional view showing a connection structure of the mounting center and the mounting plate.

Description of reference numerals: 1. a camshaft; 11. a shaft lever; 111. a spline; 112. an installation part; 12. a cam; 2. supporting the tip; 3. mounting a disc; 31. mounting a centre; 311. a sliding groove; 3111. fixing the rod; 3112. a yielding groove; 312. an elastic member; 313. an operation slot; 3131. an operating lever; 314. a connecting rod; 32. a butting block; 321. a counter bore; 3211. countersunk head screws; 322. an arc-shaped surface; 33. mounting grooves; 331. fixing grooves; 3311. positioning a groove; 34. an embedding groove; 341. a threaded hole; 4. and (4) a tail seat.

Detailed Description

The present application is described in further detail below with reference to figures 2-4.

The embodiment of the application discloses camshaft abrasive machining is with location frock. Referring to fig. 2, the positioning tool for camshaft grinding comprises a supporting center 2 and a mounting disc 3, wherein the mounting disc 3 is disc-shaped, and the mounting disc 3 is coaxially provided with a mounting center 31; the tip of the supporting center 2 is abutted against the inner side wall of the central hole at the end of the camshaft 1 provided with the spline 111, and the tip of the mounting center 31 is abutted against the inner side wall of the central hole at the end of the camshaft 1 provided with the cam 12. The mounting disc 3 can be coaxially and fixedly connected with a main shaft of a grinding machine tool through a three-jaw chuck, the supporting tip 2 can be mounted on a tailstock 4 of the grinding machine tool, and the supporting tip 2 can rotate around the axis of the supporting tip. The support center 2 cooperates with the mounting center 31 to support the camshaft 1. The side wall of the mounting plate 3 facing the tailstock 4 is provided with an abutment block 32. The abutment block 32 may abut against the outer peripheral wall of the cam 12; when the mounting disc 3 rotates along with the machine tool spindle, the abutting block 32 abuts against the cam 12, so that the camshaft 1 is driven to rotate, and the camshaft 1 is ground by a grinding wheel for grinding of a machine tool.

Referring to fig. 3, the side wall of the mounting disc 3 provided with the abutting block 32 is provided with a mounting groove 33, the mounting groove 33 is coaxial with the mounting disc 3, the mounting groove 33 is axially formed along the mounting center 31, and one end of the mounting center 31 facing the mounting disc 3 can be matched with the mounting groove 33 in an inserting manner, so that the mounting center 31 can be conveniently detached and installed. The lateral wall that the mounting disc 3 was provided with butt piece 32 has seted up along the mounting disc 3 axial and has set up groove 34, and the one end and the groove 34 grafting cooperation of setting up of butt piece 32 are convenient for tear, adorn butt piece 32 open. The installation centre 31 and the butt joint block 32 are respectively detachably connected with the installation disc 3, so that the tool is convenient to store and store.

Referring to fig. 3, the embedding groove 34 radially distributes in proper order along the mounting disc 3 and has a plurality ofly, and the butt piece 32 can be inserted and is located different embedding grooves 34 to adjust the distance at butt piece 32 and the mounting disc 3 center, in order to guarantee that butt piece 32 can with the cam 12 butt of unidimensional camshaft 1, improve the suitability of frock. At least two embedding grooves 34 are respectively and uniformly distributed along the circumferential direction of the mounting disc 3, in the embodiment, the number of the embedding grooves 34 on the same circumference is two, and the number of the abutting blocks 32 is correspondingly provided with two; two butt piece 32 simultaneously with the cam 12 butt of camshaft 1, have improved the stability of frock to camshaft 1 clamping, have reduced the unbalance nature when mounting disc 3 rotates simultaneously, camshaft 1 rotates more steadily to the lathe main shaft, has improved abrasive machining's precision.

Referring to fig. 3, a counter bore 321 is formed in the side wall of the abutting block 32 away from the mounting disc 3 in the axial direction of the mounting disc 3, a through hole is formed in the bottom wall of the counter bore 321 in the axial direction of the mounting disc 3 in a penetrating manner, and a threaded hole 341 is formed in the bottom wall of each embedding groove 34 in the axial direction of the mounting disc 3; the through hole of the abutting block 32 is internally penetrated and inserted with a countersunk screw 3211, the countersunk screw 3211 is in threaded connection with the inner side wall of the threaded hole 341 to fix the abutting block 32, and the abutting block 32 is prevented from falling off due to mistaken collision of an operator when the workpiece is dismounted and mounted. In this embodiment, the embedding block is a rectangular block, the abutting block 32 is made of aluminum alloy, and the side wall of the abutting block 32 abutting against the cam 12 is an arc-shaped surface 322, so as to prevent the sharp edge of the abutting block 32 from contacting the cam 12 to wear the cam 12.

Referring to fig. 4, a sliding groove 311 is formed in an outer circumferential wall of one end of the mounting tip 31 inserted into the mounting groove 33, the sliding groove 311 is formed along a radial direction of the mounting tip 31, the sliding groove 311 is a rectangular groove, and a fixing rod 3111 is slidably connected to an inner side wall of the sliding groove 311. The fixed slot 331 is seted up along its radial to the mounting groove 33 inside wall, and the dead lever 3111 is kept away from the one end of the groove 311 diapire that slides and is pegged graft with fixed slot 331 and cooperate. An elastic part 312 is arranged between the fixed rod 3111 and the mounting tip 31, one end of the elastic part 312 is abutted against the end wall of one end of the fixed rod 3111 in the sliding groove 311, and the other end of the elastic part 312 is abutted against the bottom wall of the sliding groove 311, so that the fixed rod 3111 can be driven to move towards the direction of the fixed groove 331, the end wall of one end of the fixed rod 3111 inserted into the fixed groove 331 is abutted against the bottom wall of the fixed groove 331, the fixed rod 3111 is prevented from being separated from the fixed groove 331, and the mounting tip 31 is prevented from being separated from the mounting groove 33.

Referring to fig. 4, an operation groove 313 is formed in the outer circumferential wall of the mounting tip 31 located outside the mounting groove 33 along the radial direction of the mounting tip 31, and an operation rod 3131 is slidably connected to the inner side wall of the operation groove 313. The lateral wall of the groove 311 that slides towards the bottom wall direction of mounting groove 33 has seted up along the installation top 31 axial and has stepped down groove 3112, and stepped down groove 3112 communicates with each other with operation groove 313, and the groove 3112 inside wall that steps down is connected with connecting rod 314 along the radial sliding of installation top 31, the one end and the dead lever 3111 welded fastening of connecting rod 314, the other end and the action bars 3131 welded fastening of connecting rod 314. An operator presses the operating rod 3131, so that the fixing rod 3111 is separated from the fixing groove 331, the tip 31 can be detachably mounted, and the device is simple in structure and convenient to operate.

Referring to fig. 3 and 4, a positioning groove 3311 is formed in a sidewall of the fixing groove 331 facing the bottom wall of the mounting groove 33, the positioning groove 3311 is axially perforated along the mounting groove 33, and the positioning groove 3311 is communicated with the mounting groove 33; the depth of the positioning groove 3311 is smaller than that of the fixing groove 331. The one end that dead lever 3111 inserted the fixed slot 331 and slides the cooperation with constant head tank 3311, after the end wall of the installation top 31 and the diapire butt of mounting groove 33, the fixed block aligns with fixed slot 331, and the installation operation of the installation top 31 is more convenient.

Referring to fig. 3 and 4, a plurality of fixing rods 3111 and operating rods 3131 are uniformly arranged in sequence along the circumferential direction of the mounting center 31, in this embodiment, the number of the fixing rods 3111 and the number of the operating rods 3131 are two, and the number of the fixing grooves 331 is also two. Two dead levers 3111 of edge installation top 31 circumference evenly distributed are convenient for reduce the rotatory unbalance of mounting disc 3, improve camshaft 1 pivoted stability.

The implementation principle of camshaft processing location frock of the embodiment of this application does:

when the camshaft 1 needs to be ground, an operator fixes the mounting disc 3 with a main shaft of a grinding machine tool through a three-jaw chuck and installs the supporting center 2 on the tailstock 4; assembling and fixing the mounting center 31 and the mounting disc 3; the inner side wall of a center hole at one end, far away from the spline 111, of the camshaft 1 is abutted against the mounting center 31, and the tailstock 4 is moved, namely the support center 2 is abutted against the inner side wall of the center hole at one end, provided with the spline 111, of the camshaft 1; mounting the abutment block 32; and rotating the camshaft 1 along the direction opposite to the main shaft of the machine tool until the cam 12 abuts against the abutting block 32, namely completing the clamping of the camshaft 1 and the tool.

During batch processing, the abutting block 32 is adjusted and fixed only during first processing; when a subsequent workpiece is machined, the workpiece can be easily clamped only by moving the tailstock 4. Only butt piece 32 and cam 12 lateral wall butt, frock and camshaft 1 area of contact are little, and the frock is less to camshaft 1's wearing and tearing, has guaranteed camshaft 1's outward appearance and precision.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a camshaft abrasive machining is with location frock which characterized in that: comprises a supporting center (2) which can be abutted against the inner side wall of a central hole at one end of a camshaft (1) provided with a spline (111) and a mounting disc (3) which can be fixedly connected with a machine tool spindle; the supporting center (2) can be rotatably connected with a machine tool around the axis of the supporting center; the mounting disc (3) is provided with a mounting centre (31) which can be abutted against the inner side wall of the central hole at one end of the cam shaft (1) provided with the cam (12); the mounting disc (3) is provided with an abutting block (32) which can abut against the peripheral wall of the cam (12).

2. The camshaft grinding process of claim 1 uses location frock, characterized in that: the side wall of the abutting block (32) abutting against the cam (12) is set to be an arc-shaped surface (322).

3. The camshaft grinding process of claim 2 uses location frock, its characterized in that: the abutting block (32) is detachably connected with the mounting disc (3).

4. The camshaft positioning tool for abrasive machining according to claim 3, characterized in that: the side wall that mounting disc (3) was provided with butt block (32) is provided with along mounting disc (3) axial and inlays groove (34), the cooperation of pegging graft can be followed with embedding groove (34) to the one end of butt block (32).

5. The camshaft positioning tool for abrasive machining according to claim 4, characterized in that: the embedding grooves (34) are radially provided with a plurality of embedding grooves along the mounting disc (3).

6. The camshaft positioning tool for abrasive machining according to claim 5, characterized in that: every embedding groove (34) evenly is provided with two at least along mounting disc (3) circumference respectively in proper order, butt joint piece (32) quantity correspondence is provided with two at least.

7. The camshaft grinding process of claim 1 uses location frock, characterized in that: the side wall of the mounting disc (3) provided with the abutting block (32) is provided with a mounting groove (33) along the axial direction of the mounting tip (31), and one end of the mounting tip (31) facing the mounting disc (3) is in plug fit with the mounting groove (33).

8. The camshaft grinding process of claim 7 is with location frock, its characterized in that: the outer peripheral wall of one end, inserted into the mounting groove (33), of the mounting tip (31) is provided with a sliding groove (311) along the radial direction of the mounting tip (31), the inner side wall of the sliding groove (311) is connected with a fixing rod (3111) in a sliding manner, and the inner side wall of the mounting groove (33) is provided with a fixing groove (331) for inserting one end of the fixing rod (3111); an elastic part (312) capable of driving the fixing rod (3111) to move towards the direction of the fixing groove (331) is arranged between the fixing rod (3111) and the mounting tip (31); the outer peripheral wall of the mounting center (31) located outside the mounting groove (33) is provided with an operating rod (3131) connected with the fixed rod (3111) in a sliding mode along the radial direction of the mounting center (31).

9. The camshaft grinding process of claim 8 is with location frock, its characterized in that: the fixing rod (3111) and the operating rod (3131) are respectively and uniformly arranged at least two in sequence along the circumferential direction of the mounting tip (31), and the number of the fixing grooves (331) is the same as that of the fixing rod (3111).

10. The camshaft grinding process of claim 9 uses location frock, characterized in that: a positioning groove (3311) communicated with the mounting groove (33) is respectively arranged on the side wall of each fixing groove (331) facing the bottom wall direction of the mounting groove (33) in a penetrating manner along the axial direction of the mounting groove (33), and one end of the fixing rod (3111) can be connected with the inner side wall of the positioning groove (3311) in a sliding manner; the depth of the positioning groove (3311) is smaller than that of the fixing groove (331).