CN218461870U

CN218461870U - Automatic positioning, centering and clamping device for cylindrical grinding part

Info

Publication number: CN218461870U
Application number: CN202222376004.2U
Authority: CN
Inventors: 顾星; 宋辉; 陈德源; 晏冲; 白坤; 顾乐瑶; 秦宇乐; 李翔
Original assignee: Suzhou Vocational University
Current assignee: Suzhou Vocational University
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2023-02-10
Anticipated expiration: 2032-09-07

Abstract

The invention provides an automatic positioning, centering and clamping device for cylindrical grinding parts, which comprises a front center body, a shell and a pinch roller disc, wherein the front center body, the shell and the pinch roller disc are coaxial, the shell and the pinch roller disc are sleeved outside the rear section of the front center body, an outer dustproof cover is arranged outside the shell in a matched manner, an inner dustproof cover is arranged in the rear end in a matched manner, two bearings are arranged in an inner cavity, the pinch roller disc is of a hollow disc-shaped structure, a through hole is formed in the middle of the pinch roller disc, spiral groove groups are arranged on the front side surface and the rear side surface, each spiral groove group comprises three spiral grooves which are uniformly distributed along the circumferential direction, pinch rollers are arranged between the left spiral groove and the right spiral groove, and a transmission boss is further arranged on the side surface of the front end of the shell. The automatic aligning, positioning and clamping device not only can realize automatic aligning, positioning and clamping of the machined part, has a compact structure, is simple, convenient and quick to use, but also can quickly take and place the clamp of the machined part; the problem of the quick location clamp of axle type part is solved, production efficiency has been improved, manufacturing cost and intensity of labour have been reduced, the high-efficient clamping requirement of axle type part has been satisfied.

Description

Automatic positioning, centering and clamping device for cylindrical grinding part

Technical Field

The invention relates to the technical field of clamps, in particular to an automatic positioning, centering and clamping device for cylindrical grinding parts.

Background

The fine machining of the outer cylindrical surface of the shaft part is usually completed by grinding and machining through a cylindrical grinding machine. When the cylindrical grinding machine grinds the outer surface of a part, in order to ensure the shape precision and the geometric characteristic position precision of the part, the part is usually positioned by adopting a front and back double-center positioning mode, and is clamped by adopting a spindle end heart-shaped chuck, so that the spindle drives the heart-shaped chuck to rotate the part, and the precision grinding work is completed. However, the heart-shaped chuck clamps the parts, the action is complicated, the efficiency is low, and the fastening screw on the heart-shaped chuck is easy to deform the machined parts.

Disclosure of Invention

In order to solve the problems, the invention discloses an automatic positioning, centering and clamping device for cylindrical grinding parts, which can realize automatic alignment, positioning and clamping of the machined parts, has compact structure and simple, convenient and quick use, and can also be used for quickly taking and placing a clamp of the machined parts; the problem of the quick location clamp of axle type part is solved, production efficiency has been improved, manufacturing cost and intensity of labour have been reduced, the high-efficient clamping requirement of axle type part has been satisfied.

The specific scheme is as follows:

the utility model provides an excircle grinding part automatic positioning centering clamping device which characterized in that: the front center body, the shell and the pinch roller disc share the same central axis, the shell and the pinch roller disc are arranged in the front and at the back and are sleeved outside the back section of the front center body in a matching mode, the shell is of a cylindrical structure, an outer dust cover is installed outside the front end of the shell in a matching mode, an inner dust cover is installed inside the back end of the shell in a matching mode, two bearings which are arranged in the front and at the back are arranged in an inner cavity, the inner ring and the outer ring of each bearing are connected with the outer side of the front center body and the inner side of the shell respectively, the pinch roller disc is of a hollow disc-shaped structure, a through hole for the front center body to penetrate through is formed in the middle of the pinch roller disc, spiral groove groups are symmetrically arranged on the front side face and the back side face of the pinch roller disc and comprise three spiral grooves which are evenly distributed in the circumferential direction, each spiral groove is an arc-shaped strip hole, one end of each spiral groove is close to the through hole, the other end of each spiral groove is far away from the through hole, the middle of the pinch roller disc protrudes outwards, pinch roller disc sliding wheels are installed between the spiral grooves in a matching mode, when the shell drives the pinch roller disc to rotate, three pinch rollers can synchronously do spiral centripetal rolling motion, and a transmission boss is further arranged on the front side face of the shell.

As a further improvement of the invention, the front center body consists of a truncated cone body, a first cylinder, a second cylinder and a cone which are sequentially arranged from front to back, wherein the truncated cone body is small in front and large in back, the diameter of the first cylinder is larger than that of the second cylinder, a ring body is arranged outside the middle of the truncated cone body, the cone head of the cone body faces to the back side, and the truncated cone body, the first cylinder, the second cylinder and the cone share a central axis.

As a further improvement of the invention, the inner ring of the bearing is connected with the outer side of the first cylinder, and the two bearings are respectively arranged at the front side and the rear side of the annular body.

As a further improvement of the invention, an outer dustproof cover is arranged outside the front end of the shell in a matched mode through a dustproof cover screw.

As a further improvement of the present invention, the pressure wheel disc is mounted at the rear end of the housing by screw fitting.

As a further improvement of the invention, the front side of the pressure wheel disc is provided with a boss which is of a circular ring structure. The boss is used for being matched with the shell in a high-precision mode to ensure that the boss and the front center body have higher central concentricity, and further, the center point of the front center body can be used as the center to ensure that three pressing wheels on the device can be kept on the same circumferential track when moving in the spiral groove.

As a further improvement of the invention, the front side and the rear side of the clamping device are respectively provided with a front centre fixing shaft and a rear centre which share the same central axis with the front centre fixing shaft, the middle part of the rear end of the front centre fixing shaft is provided with a taper hole for inserting the front section of the front centre body, the rear section is externally provided with a machine tool main shaft power disc, the rear side edge of the machine tool main shaft power disc is provided with a transmission pin which can be in contact with a transmission boss, and a shaft part is arranged between the rear centre and the front centre body.

Compared with the prior art, the invention has the beneficial effects that:

1. the front center body of the device is directly inserted into a front center fixed shaft taper hole of a main shaft box of a machine tool, and then the fixed connection with grinding machine equipment is completed.

2. The device has compact integral structure, is convenient and quick to assemble and disassemble workpieces, and does not need other auxiliary tools.

3. The machined part can be automatically centered only by aligning the front tip and the rear tip.

4. The centering and taking and placing of the workpiece can be quickly realized by moving the rear center, the front center and the rear center are positioned, the repeated positioning precision is high, the use precision is high, and the position precision and the machining precision of parts are easily ensured.

5. The machine tool can drive the shell of the device to rotate when being started, and the pinch roller can be contacted with a workpiece under the action of inertia.

6. When the device works, the device automatically clamps the workpiece under the action of the grinding force of the grinding wheel on the workpiece.

7. After the machining is finished, the workpiece can be taken down by slightly rotating the workpiece in the opposite direction.

8. The device is simple to operate, and has high reliability, repeatability and use consistency.

10. The automatic centering and clamping actions improve the production efficiency and the clamping and positioning precision, and reduce the production cost and the labor intensity.

Drawings

FIG. 1 is an external schematic view of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

FIG. 3 is a schematic diagram of the construction of the puck of the present invention.

Fig. 4 is a cross-sectional view of the present invention in an operating state.

FIG. 5 is an exterior view of the invention under a work sill.

List of reference numerals:

1-pressure wheel disc, 2-shell, 3-outer dust cover, 4-front center body, 5-dust cover screw, 6-bearing, 7-inner dust cover, 8-screw, 9-pressure wheel, 10-machine tool spindle power disc, 11-front center fixed shaft, 12-shaft part, 13-rear center, 14-driving pin, 15-driving boss, 21-boss and 22-spiral groove.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.

As shown in fig. 1-3, an automatic positioning, centering and clamping device for cylindrical grinding parts comprises a front center body 4, a shell 2 and a pressure wheel disc 1, wherein the front center body 4, the shell 2 and the pressure wheel disc 1 share a common central axis, the shell 2 and the pressure wheel disc 1 are arranged in front and at back and are matched and sleeved outside the back section of the front center body 4, the shell 2 is of a cylindrical structure, the front end of the shell is externally matched and provided with an outer dust cover 3, the back end of the shell is internally matched and provided with an inner dust cover 7, two bearings 6 arranged in front and at back are arranged in an inner cavity, the inner ring and the outer ring of each bearing 6 are respectively connected with the outer side of the front center body 4 and the inner side of the shell 2, the pressure wheel disc 1 is of a hollow disc-shaped structure, a through hole for the front center body 4 to pass through is arranged in the middle of the pressure wheel disc, spiral groove groups are symmetrically arranged on the front side face and the back side face, each spiral groove group comprises three spiral grooves 22 uniformly distributed along the circumferential direction, the spiral grooves 22, the spiral grooves are arc-shaped bar holes, one end of each spiral groove 22 is close to the through hole, the other end of the through hole is far away from the through hole, the middle of the edge of the pressure wheel disc 1 protrudes outwards, wherein, the left symmetrical spiral grooves are arranged between the left spiral grooves 22 and right symmetrical grooves, the left spiral grooves, the pressure wheel disc 2, when the pressure wheel disc 1 rotates, the pressure wheel disc 2, the pressure wheel disc can synchronously roll, and the front side face of the pressure wheel disc 2, and the pressure wheel disc can synchronously roll, and the shell 2, and a boss 15 is arranged on the shell.

In this embodiment, preceding apex body 4 comprises round platform body, first cylinder, second cylinder and the cone that sets gradually from the past backward, and wherein, round platform body front is little big back, and the diameter of first cylinder is greater than the diameter of second cylinder, and is equipped with the tourus outside the middle part, and the conical head of cone is towards the rear side, and round platform body, first cylinder, second cylinder and cone share the axis.

In this embodiment, the inner ring of the bearing 6 is connected to the outer side of the first cylinder, and the two bearings 6 are respectively disposed on the front and rear sides of the torus.

In the present embodiment, the outer dust cap 3 is fittingly mounted to the outer front end of the housing 2 by a dust cap screw 5, and the pressure wheel disk 1 is fittingly mounted to the rear end of the housing 2 by a screw 8.

In the present embodiment, the boss 21 is provided on the front side of the platen wheel 1, and the boss 21 has an annular structure. The boss 21 is used for being matched and installed with the shell 2 in a high-precision mode so as to ensure that the boss and the front center body 4 have higher central concentricity, and further, the center point of the front center body 4 can be used as the center, and the three pressing wheels 9 on the device can be kept on the same circumferential track when moving in the spiral groove 22.

In this embodiment, a front tip fixing shaft 11 and a rear tip 13, which share a central axis with the front and rear sides of the clamping device, are respectively disposed on the front and rear sides of the clamping device, a tapered hole for inserting the front section of the front tip body 4 is disposed in the middle of the rear end of the front tip fixing shaft 11, a machine tool spindle power disc 10 is disposed outside the rear section, a transmission pin 14 capable of contacting with a transmission boss 15 is disposed on the rear side edge of the machine tool spindle power disc 10, and a shaft part 12 is disposed between the rear tip 13 and the front tip body 4.

The working principle of the invention is as follows (as shown in fig. 4 and 5):

(1) When the device is used, the front center body 4 of the device is inserted into a taper hole of a front center fixing shaft 11 of a spindle box of a machine tool, so that the device is fixedly connected with grinding machine equipment.

(2) The machined shaft part 12 is inserted into the device and is in contact with the conical surface of the front center body 4. And moving the tailstock of the machine tool to enable the rear center 13 of the machine tool to abut against the rear center hole of the shaft part 12 to be processed. Under the action of the conical surfaces of the front centre and the rear centre, the central line of the processed shaft part 12 is superposed with the central line of the centre, so that the automatic centering and positioning of the parts are realized.

(3) When the cylindrical grinding machine is started, the machine tool spindle power disc 10 rotates along the N direction, and at the moment, the transmission pin 14 on the machine tool spindle power disc contacts the transmission boss 15 on the shell 2, so that the purpose that the machine tool spindle rotates to drive the shell of the device is achieved.

(4) The shell 2 drives the pressure wheel disc 1 to rotate simultaneously, and three pressure wheels 9 arranged in the pressure wheel disc 1 realize contact with the processed shaft part 12 under the action of rotational inertia.

(5) When the grinding process is started, the shaft-like part 12 to be processed is rotated in the R direction by the cutting force of the grinding wheel. At this time, under the action of friction force between the pressing wheels 9 and the machined shaft part 12, the pressing wheels 9 centripetally roll in spiral grooves of the pressing wheel disc, and finally, the three pressing wheels are in close contact with the cylindrical surface of the machined shaft part 12, so that the machined shaft part is driven to rotate along with the main shaft power disc. The automatic clamping of the device to the shaft parts to be machined is realized.

(6) After the grinding operation of the parts is finished, the grinding wheel is withdrawn, the rotation of the main shaft is stopped, the rear center 13 of the machine tool is removed, the shaft parts to be machined are held by hands and rotated along the reverse direction of R, the pinch roller 9 is separated from the shaft parts 12 to be machined, and the shaft parts to be machined can be taken out easily.

The technical means disclosed in the scheme of the invention are not limited to the technical means disclosed in the above embodiments, but also include the technical means formed by any combination of the above technical features. It should be noted that modifications and adaptations can be made by those skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims

1. The utility model provides an excircle grinding part automatic positioning centering clamping device which characterized in that: including preceding apex body (4), casing (2) and pinch roller dish (1) of sharing axis, casing (2) and pinch roller dish (1) set up around and cooperate the cover to establish outside the back end of preceding apex body (4), casing (2) are cylindric structure, and outer shield (3) are installed to its front end outer cooperation, and interior shield (7) are installed to the rear end fit in, are equipped with bearing (6) that set up around two in the inner chamber, the inner circle and the outer lane of bearing (6) are connected with the outside of preceding apex body (4) and the inboard of casing (2) respectively, pinch roller dish (1) are hollow discoid structure, and its middle part is equipped with the perforation that supplies preceding apex body (4) to pass, and the symmetry is equipped with spiral slot group on the both sides face around, spiral slot group includes three spiral slot (22) along circumferencial direction evenly distributed, spiral slot (22) are arc strip hole, and its one end is close to the perforation, and the other end is kept away from the perforation, and middle part is to the edge of pinch roller dish (1), wherein, and the spiral slot (22) of controlling two symmetry installs between spiral slot (9) and still be equipped with the cooperation boss (15) in the preceding side of transmission.

2. The automatic positioning, centering and clamping device for cylindrical grinding parts according to claim 1, is characterized in that: preceding apex body (4) comprises round platform body, first cylinder, second cylinder and the cone that sets gradually from the past backward, and wherein, big end back before the round platform body, the diameter of first cylinder is greater than the diameter of second cylinder, and is equipped with the tourus outside the middle part, and the conical head of cone is towards the rear side, round platform body, first cylinder, second cylinder and cone axis altogether.

3. The automatic positioning, centering and clamping device for the cylindrical grinding part as claimed in claim 2, characterized in that: the inner ring of the bearing (6) is connected with the outer side of the first cylinder, and the two bearings (6) are respectively arranged on the front side and the rear side of the circular ring body.

4. The automatic positioning, centering and clamping device for the cylindrical grinding part as recited in claim 1, characterized in that: an outer dustproof cover (3) is installed outside the front end of the shell (2) in a matched mode through a dustproof cover screw (5).

5. The automatic positioning, centering and clamping device for cylindrical grinding parts according to claim 1, is characterized in that: the pressure wheel disc (1) is installed at the rear end of the shell (2) through a screw (8) in a matching mode.

6. The automatic positioning, centering and clamping device for cylindrical grinding parts according to claim 1, is characterized in that: the front side of the pressure wheel disc (1) is provided with a boss (21), and the boss (21) is of a circular ring structure.

7. The automatic positioning, centering and clamping device for the cylindrical grinding part as recited in claim 1, characterized in that: the front side and the rear side of the clamping device are respectively provided with a front center fixing shaft (11) and a rear center (13) which share the same central axis, the middle of the rear end of the front center fixing shaft (11) is provided with a taper hole for inserting the front section of the front center body (4), the rear section is externally provided with a machine tool spindle power disc (10), the rear side edge of the machine tool spindle power disc (10) is provided with a transmission pin (14) which can be in contact with a transmission boss (15), and a shaft part (12) is arranged between the rear center (13) and the front center body (4).