KR20170090769A - Crankshaft machining device - Google Patents

Crankshaft machining device Download PDF

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Publication number
KR20170090769A
KR20170090769A KR1020160011523A KR20160011523A KR20170090769A KR 20170090769 A KR20170090769 A KR 20170090769A KR 1020160011523 A KR1020160011523 A KR 1020160011523A KR 20160011523 A KR20160011523 A KR 20160011523A KR 20170090769 A KR20170090769 A KR 20170090769A
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KR
South Korea
Prior art keywords
crankshaft
machining
rotating
center
polishing head
Prior art date
Application number
KR1020160011523A
Other languages
Korean (ko)
Inventor
백영종
Original Assignee
주식회사 에스케이이엠
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 에스케이이엠 filed Critical 주식회사 에스케이이엠
Priority to KR1020160011523A priority Critical patent/KR20170090769A/en
Publication of KR20170090769A publication Critical patent/KR20170090769A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/065—Steady rests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • B24B5/421—Supports therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • B24B5/423—Single-purpose machines or devices for grinding crankshafts or crankpins having a grinding wheel turning around the workpiece

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crankshaft machining apparatus for machining a journal and a fin portion of a crankshaft. More particularly, the present invention relates to a crankshaft machining apparatus capable of machining a pin portion in a state in which the shaft center of the crankshaft is fixed.
The crankshaft machining apparatus according to the present invention includes: a rotating portion (2) for rotating the center of a shaft while holding both ends of the crankshaft (1); A machining portion 3 disposed on one side of the rotary portion 2 and capable of machining the outer peripheral surface of the journal 11 and the fin 12 of the crankshaft 1 rotated by the rotary portion 2; A crankshaft 1 which is disposed on the opposite side of the machining portion 3 with respect to the rotating portion 2 and is in contact with the journal 11 of the crankshaft 1 rotated by the rotating portion 2, (4) for attenuating the work vibration transmitted to the work (1).

Description

[0001] Crankshaft machining device [0002]

The present invention relates to a crankshaft machining apparatus that allows machining of journals and fin portions of a crankshaft.

Normally, the crankshaft has a journal rotating on the same line as the center of the shaft and a pin portion eccentrically rotating from the center of the shaft. In the case of the above-described journal, the outer peripheral surface of the journal can be easily processed by fixing the center of the shaft by using a fixing method such as a lathe. However, since the pin portion is eccentrically rotated from the center of the shaft, it is difficult to process the pin portion from the above-described fixing method. Conventional processing methods for the above-mentioned fin portions generally process the outer peripheral surface of the fin portion by eccentrically fixing and rotating the center of the shaft of the crankshaft so as to rotate about the center of the fin portion. However, the above-mentioned conventional processing method has a problem that the number of processing steps is increased and the production speed is slowed because the crankshaft has to be separately machined for the journal and fin portions.

Japanese Patent Application Laid-Open No. 10-2015-0112929

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to enable machining of the pin portion in a state where the axis center of the crankshaft is fixed.

The present invention provides a means for achieving the above object, which is capable of rotating a shaft center of a crankshaft in a fixed state, wherein a center of the shaft is horizontally aligned on the side of the shaft center side of the crankshaft, Wherein the polishing head is configured to process the outer circumferential surface of the fin portion while horizontally moving back and forth on the side surface in accordance with the turning radius of the fin portion that eccentrically rotates from the axis center of the crankshaft during machining of the fin portion of the crankshaft do.

According to the above configuration, it is possible to finish machining of the fin portion and the journal in a state that the crankshaft is grasped at a time. This makes it possible to reduce the number of machining steps, reduce the number of equipments, reduce the cost, improve the production speed, and improve the productivity of the crankshaft, because the crankshaft fixing method is divided into the axial rotation and eccentric rotation, , Productivity is remarkably improved.

1 is a plan view showing a crankshaft working apparatus according to the present invention.
Fig. 2 is a front view showing the rotating part of Fig. 1
3 is a side elevational view showing the machining portion of Fig.
Fig. 4 is an operation example showing a processing method for the machining portion of Fig. 3
Fig. 5 is a side elevation view showing the dustproof portion of Fig. 1

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings may be exaggerated, omitted, or outlined for convenience of description, and the terms and names used in the description are intended to be implicitly construed according to the shape, And the description of the position will be described with reference to the drawings unless otherwise specified. And specific descriptions of well-known and commonly-used techniques may be omitted to avoid obscuring the subject matter, or to be omitted or replaced with a simple code or name.

first, 1  Reference will now be made to the following.

1 is a plan view of a crankshaft working apparatus according to the present invention. As shown in the figure, the crankshaft working apparatus according to the present invention is capable of rotating the center of a shaft while holding both ends of the crankshaft 1 A rotating part 2 for rotating the rotating part 2; A machining portion 3 disposed on one side of the rotary portion 2 and capable of machining the outer peripheral surface of the journal 11 and the fin 12 of the crankshaft 1 rotated by the rotary portion 2; A crankshaft 1 which is disposed on the opposite side of the machining portion 3 with respect to the rotating portion 2 and is in contact with the journal 11 of the crankshaft 1 rotated by the rotating portion 2, (4) for attenuating the work vibration transmitted to the work (1).

Hereinafter, each of the above-described configurations will be described in more detail as follows.

first, 2  Reference will now be made to the following.

2 is a front view showing the rotating part of FIG. 1, in which the rotating part 2 is in the form of a lathe, and is capable of rotating the center of the shaft by gripping the one-end flange part 13 of the crank shaft 1 (21); And a tailstock (22) capable of idling while supporting the other end drive shaft portion (14) of the crankshaft (1) to guide the rotation of the crankshaft (1).

As shown in the figure, the crushing block 21 is installed at one end of the main shaft 51 on the base 5, and the inside of the crushing block 51 is supported by the crushing roller 21 The spindle 52 is rotated by a motor mounted inside the pivot shaft 51. The spindle 52 is rotatable by a motor mounted inside the pivot shaft 51.

As shown in the figure, the tail stock 22 is structured so as to be seated on the conveying bed 53 on the base 5 located on the opposite side of the crest 21 and horizontally slid and fixed in the direction of the crest 21 .

Below, 3  Reference will now be made to the following.

Fig. 3 is a side view showing the machining portion of Fig. 1. As shown in Fig. 3, the machining portion 3 is provided with a polishing head (not shown) which is rotated on the side of the axis center of the crankshaft 1, 31); And a transfer unit 6 capable of transferring the polishing head 31 vertically, horizontally, and laterally while supporting the polishing head 31.

More specifically, as shown in the figure, the polishing head 31 includes a main shaft 32 capable of supporting the polishing head 31; A spindle 33 provided inside the main shaft 32 and capable of rotating the polishing head 31; Although not shown in the drawings, the polishing head 31 includes a motor that is mounted inside the spindle 32 and is capable of rotating the spindle 33. Although not shown, .

As shown in the drawing, the conveying unit 6 includes a conveying bed 61 formed on the upper surface of the base 5 on which the conveying unit 6 is located; A conveyance plate 62 conveyed along the conveyance bed 61; A ball screw 63 connected between the transfer plate 62 and the base 5; (Not shown), and a motor for driving the ball screw. In the above-described structure, a structure in which two layers are stacked with different transport directions is provided, and a support table 51 is installed on the uppermost transfer plate 64 .

Below, 4  Reference will now be made to the following.

3, the crankshaft 1 is rotated in place by the rotating portion 2, and the machining portion 3 is rotated by the crankshaft 1, The polishing head 31 of the machining portion 3 is horizontally moved forward and backward along the radius of rotation of the fin 12 that eccentrically rotates from the axis center of the crankshaft 1 during machining of the fin portion 12 of the machining portion 1 The outer peripheral surface of the fin portion 12 is processed while moving.

Since the journal 11 does not eccentrically rotate from the center of the axis of the crankshaft 1, the crankshaft 1 is not subjected to eccentric rotation so that the polishing head 31 does not need to move back and forth, You can process it.

Below, 5  Reference will now be made to the following.

Fig. 5 is a side view illustrating the dustproof portion of Fig. 1. As shown in Fig. 5, the dustproof portion 4 is disposed horizontally and horizontally on the side of the other side of the axis of the crankshaft 1, (41) for making idle while being in contact with one side of the outer circumferential surface of the journal (11); And a transfer unit 6 capable of transferring the fluid in the up, down, left, and right directions on the plane while supporting the fluid outlet 41.

As shown in the figure, the discharge port 41 is provided with a support 40 for mounting and supporting the discharge port 41, and the discharge port 40 of the support 40 And a cylinder 42 provided on the opposite side of the crankshaft 1 so as to be capable of forwardly and backwardly pushing and pushing the crankshaft 1 toward the crankshaft 1.

As shown in the figure, the transfer part 6 has the same shape as the transfer part 6 of the processing part 3 described above.

Hereinafter, a description will be made of a portion which is shown but not explained.

As shown in Fig. 1, the crankshaft processing apparatus according to the present invention has the machining portion 3 and the dust-proof portion 4 on both sides with respect to the center in the longitudinal direction of the crankshaft 1 in plan view. That is, the machining portion 3 and the dustproof portion 4 are formed of two pieces. In this way, the middle portion of the crankshaft 1 can be divided into two parts, and the rotation of the crankshaft 1 can be guided from the machining portion 3 at the time of machining, so that the machining process is reduced in half , It is possible to attenuate the machining vibration for the machined portion, thereby making it possible to remarkably improve the machining speed as well as the precise machining.

Hereinafter, the operation of the present invention will be described.

1, the flange portion 13 of the crankshaft 1 is gripped by the crankshaft 21 of the rotating portion 2 and the crankshaft 21 is pushed against the crankshaft 22 1 is fixed. The dustproof portion 4 is advanced to the crankshaft 1 side so as to be brought into close contact with the journal 11 of the crankshaft 1 positioned nearest to the fin 12 to be processed. Thereafter, the machining portion 3 is advanced to the crankshaft 1 side to be brought into contact with the outer peripheral surface of the fin portion 12 to be machined. Then, the rotating portion 2 and the machining portion 3 are driven to rotate the crankshaft 1 and the polishing head 31.

The machining unit 3 calculates the radius of rotation of the fin 12 and the circumference of the circumference of the polishing head 31 from the axis center of the crankshaft 1 so that the polishing head 31 The outer peripheral surface of the fin 12 is machined while advancing and retracting horizontally.

On the other hand, the journal 11 of the crankshaft 1 is machined in the same manner as described above, except that the polishing head 31 rotates about the axis of the crankshaft 1, It is sufficient to process the outer peripheral surface of the base 11.

Hereinafter, the effects of the present invention according to the above-described operation will be described.

A crankshaft processing apparatus according to the present invention includes a crankshaft 1 having a crankshaft 1 and a crankshaft 1. The crankshaft 1 includes a crankshaft 1 and a crankshaft 1, 31 are moved forward and backward horizontally in accordance with the radius of rotation of the fin portion 12 while the outer peripheral surface of the fin portion 12 is machined.

Therefore, the crankshaft machining apparatus according to the present invention has the effect of finishing the machining of the fin 12 and the journal 11 while holding the crankshaft 1 at a time.

This is because the fixing method of the crankshaft 1 is divided into the axial rotation and the eccentric rotation and is not required to be separately machined, thereby reducing the number of processing steps, thereby reducing the number of equipments and cost, And the productivity is remarkably improved.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations that can be added to or modified from the configuration of the present invention will be described.

1, the machining unit 3 includes a spindle 33 for rotating the polishing head 31 from the inside of the motor M to the polishing head 31, And a single shaft may be integrally connected to a portion extending to a portion extending from the center of the shaft.

The bearing inside the main shaft 32 supporting the spindle 33 to idle may be a hydraulic bearing.

In this way, the output of the motor M is transmitted to the polishing head 31 as it is, thereby improving the rotation speed and improving the accuracy of machining because no abrasion error occurs due to the mechanical bearing.

Although not shown in the drawings, the above-described method can be applied to the fulcrum 21 of the rotary unit 2 as it is.

In this way, the machining error is remarkably reduced due to the interaction between the polishing head 31 and the fulcrum 21 at the time of machining, leading to an effect that the machining accuracy is further maximized.

Although not shown in the drawings, the above-mentioned fulcrum 21 of the rotating part 2 may be constituted by a special collet chuck having a floating function. In this case, disturbance is not generated with respect to the workpiece other than the rotational force during rotation while grasping the crankshaft 1, thereby improving the accuracy of machining.

The conveying bed 61 of the machining unit 3 may be configured as a pair of a V-shaped guide surface and a flat guide surface. In this way, the transfer inertia force at the time of transfer of the main shaft 33 is minimized, so that the accuracy of transfer is improved and the accuracy of the processing is improved.

Hereinafter, an application example of the present invention will be described.

It is most preferable that the present invention includes all of the above-described configurations, but it is possible to select only a part of the configurations described above according to cost reduction, manufacturing convenience, or necessity. In addition, each of the above-described configurations may be independently applied to a technical field other than the technical field in consideration of the purpose, function, role, action, and the like. Based on this, the present invention can be variously specified as follows.

It will thus be appreciated by those skilled in the art that the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment of the invention, Will be possible.

1: Crankshaft 11: Journal
12: Fins 2:
21: Fracture 22:
3: machining part 31: polishing head
4: anti-vibration part 41: anti-
5: Base 6:

Claims (7)

A crankshaft working apparatus for machining a journal (11) and a fin (12) of a crankshaft (1)
A rotating portion 2 for rotating the center of the shaft while holding both ends of the crankshaft 1;
A machining portion 3 disposed on one side of the rotary portion 2 and capable of machining the outer peripheral surface of the journal 11 and the fin 12 of the crankshaft 1 rotated by the rotary portion 2;
A crankshaft 1 which is disposed on the opposite side of the machining portion 3 with respect to the rotating portion 2 and is in contact with the journal 11 of the crankshaft 1 rotated by the rotating portion 2, (4) capable of attenuating the machining vibration transmitted to the crankshaft (1).
The method according to claim 1,
The rotating portion 2 includes a fulcrum 21 capable of holding the one-end flange portion 13 of the crankshaft 1 and rotating the center of the shaft; And a tailstock (22) capable of idling while receiving the other end drive shaft portion (14) of the crankshaft (1) to guide the rotation of the crankshaft (1).
The method according to claim 1,
The machining portion (3) comprises a polishing head (31) rotating on the side of the axis center of the crankshaft (1) with the center of the axis horizontally arranged side by side; And a transfer unit (6) capable of transferring the polishing head (31) in the up, down, left and right directions while supporting the polishing head (31).
The method according to claim 1,
The polishing head 31 is provided with a polishing head 31 which is disposed on the side of the crankshaft 1 along the rotation radius of the fin 12 rotating eccentrically about the axis of the crankshaft 1 when the fin 12 of the crankshaft 1 is machined, And the outer peripheral surface of the fin portion (12) is machined.
The method according to claim 1,
The dustproof portion 4 is provided at the side opposite to the center of the crankshaft 1 so as to be horizontally orthogonal to the side surface thereof and to be rotatably supported by a discharge port 41 ); And a transfer part (6) capable of transferring the fluid in the upper, lower, left, and right directions on a plane while supporting the fluid discharge port (41).
The method of claim 3,
Wherein the machining portions (3) are provided on both sides of the center of the crankshaft (1) in plan view.
The method according to claim 2 or 3,
The grinding head 21 or the polishing head 31 is rotated by a spindle for rotating the grinding head 21 or the grinding head 31. The spindle is rotated from the inside of the motor for driving the spindle 21 ) Or the part leading to the polishing head (31), and the bearing for supporting the spindle to idle is made of a hydraulic bearing.
KR1020160011523A 2016-01-29 2016-01-29 Crankshaft machining device KR20170090769A (en)

Priority Applications (1)

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KR1020160011523A KR20170090769A (en) 2016-01-29 2016-01-29 Crankshaft machining device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160011523A KR20170090769A (en) 2016-01-29 2016-01-29 Crankshaft machining device

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11241767B2 (en) 2018-06-01 2022-02-08 Fives Landis Corp. Pendulum grinding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11241767B2 (en) 2018-06-01 2022-02-08 Fives Landis Corp. Pendulum grinding machine

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