JPH0871816A - Automatic aligning type knurling device - Google Patents

Abstract

PURPOSE: To obviate the technology and time heretofore required for alignment and obtain the uniform and fine knurled finished surface even with dislocation between the rotational center of machined material and the fitting position center of two knurling pieces. CONSTITUTION: An automatic aligning type knurling device is constituted of a holding member 3 with knurling pieces 1, 2 rotatably engaged by pins 7, 8, a supporting member 4 mounted to the tool post of a lathe or the like in use, and a guide pin 52 locked to the supporting member 4 slidably fitted into a guide hole 32 or the like bored in the holding member 3. The holding member 3 is disposed slidably in the vertical direction in relation to the supporting member 4. In addition, a spherical pressing part 60 which is the tip part of a pressing member 6 screwed with the supporting member 4 is pressed to an engaging groove provided at the end face of the holding member, and the restoring force of an internally-mounted spring 61 is utilized to set and hold the initial position of the holding member 3 to the supporting member 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knurling device used for a process called knurling, which is performed to prevent slipping, improve aesthetics, etc. By adding a mechanism that self-adjusts the mounting position of the tool to the mating workpiece, it is possible to easily obtain a uniform and clean machining state, and in recent years, the beauty of the finished state is becoming more and more demanded. It is effective in satisfying the social needs that have come up.

[0002]

2. Description of the Related Art Conventionally, in order to obtain a uniform and clean finish, when a knurling device having no position adjusting mechanism is used, it is rotatably supported by pins (7) and (8) as shown in FIG. Two knurled pieces (1) (2)
However, the position of the support member (4) is adjusted by the adjusting plates (42) having different plate thicknesses so as to contact the outer periphery (91) of the mating processed material at the same time to obtain a uniform knurled surface. Also, as shown in FIG. 11, two knurled pieces (1)
A simple self-centering knurling device having a structure in which a holding member (3) rotatably engaged with (2) is swingably engaged with a support member (4) by a support shaft (43). When using, use the knurled pieces (1) and (2) on the outer periphery of the mating material (9
When pressed against 1), the holding member (3) swings and the two knurled pieces (1) and (2) move to the outer periphery (9) of the mating workpiece.
At the same time, the knurling process was performed. The support members (4) are both used by being fixedly supported by a blade fixing base (44) of a mechanical device such as a lathe.

[0003]

These have the following drawbacks. (B) The method of adjusting the position by the plate thickness of the adjusting plate not only required adjusting plates of various thicknesses, but also required a great deal of adjustment time and skill. (B) In the method in which the knurled piece holding member is swingably supported and pressed against the mating processed material so that the two knurled pieces simultaneously contact the outer periphery of the mated processed material, the center of the mounting position of the two knurled pieces and the mating processing Since the position of the center of rotation of the material is adjusted by the swinging movement of the holding member,
As shown in FIG. 11, the two knurled pieces cannot come into contact with the mating processed material at vertically symmetrical positions, so that a difference occurs in the rolling force generated by the pressing force. Explaining with the force balance diagram shown in FIG. 12, the rolling force generated on the knurled piece (1) is F1 and the rolling force generated on the knurled piece (2) is F2 and the knurled by the pressing force applied to the knurling device. If the contact angles of the pieces (1) and (2) with the mating material are θ1 and θ2, respectively, the holding member (3)
The vertical force balances due to the oscillating motion of F, so that the relationship of F1 sin θ1 = F2 sin θ2 is established. Therefore, when the contact angles θ1 and θ2 are different, the values of the rolling forces F1 and F2 generated on the respective knurl pieces are different. If there is a difference in rolling force, there will be a difference in the degree of processing by the knurled piece, making it difficult to obtain a uniform finished surface. After all, it becomes necessary to adjust the mounting position of the support member with an adjusting plate or the like so that the deviation between the mounting position center of the two knurling pieces and the rotational center position of the mating workpiece is reduced and the contact angles θ1 and θ2 are almost the same. , It had the same drawbacks as (a) above. Particularly, in this swing type simple self-aligning type, since the holding member swings, it is difficult to specify the center of the mounting position of the two knurled pieces, and the mounting position adjustment must be tried and error. The work was very complicated. The present invention has been made to solve these drawbacks.

[0004]

A holding member, in which two knurled pieces are rotatably engaged with each other by a pin or the like, is engaged with a supporting member so as to be slidable in a vertical direction. An initial position with respect to the support member is set and held by an elastic member such as a spring, and the holding member slides vertically with respect to the support member by an external force applied to the knurl piece.

[0005]

In the self-centering type knurling device according to the present invention, a holding member having two knurled pieces rotatably engaged with each other by a pin or the like has a portion to be attached / fixed to a machine or the like to be used. The support member is slidably engaged in the vertical direction. The holding member is positioned at an initial setting position with respect to the supporting member by the restoring force of an elastic member such as a spring before the knurling piece is brought into contact with and pressed against the mating processed material. During knurling, when the knurled piece comes into contact with the opposite processed material and is pressed against it, if there is a deviation between the mounting position of the two knurled pieces and the rotational center position of the opposite processed material, the knurled piece on the first contact side will be misaligned. A force is generated in the direction to correct the. When the correction force exceeds the acting force from the elastic member such as the spring that sets the initial position of the holding member, the holding member moves up to the position where the two knurled pieces simultaneously contact the mating workpiece. , Sliding vertically with respect to the support member. In this state, the mounting center positions of the two knurled pieces and the center of rotation of the mating workpiece coincide with each other, and the initially present deviation is corrected by the self-centering function of the knurling device of the present invention. Moreover, in the case of the correction according to the present invention, unlike the conventional correction by the swinging of the holding member, the two knurl pieces are in contact with each other at the vertically symmetrical position with respect to the mating workpiece, that is, the contact angle is the same. Uniform knurling is possible because the same rolling force is generated when knurling with increased pressing force.

[0006]

EXAMPLES Examples of the present invention will be described below. FIG. 1 is a front view cross section of an embodiment of a self-centering knurling device according to the present invention. 2 is a plan view of the embodiment. Two knurled pieces (1) and (2) are pins (7)
It is rotatably engaged with the holding member (3) by (8), two guide holes (31) and (32) are bored in the holding member (3), and it is locked to the support member (4). By fitting the two guide pins (51) and (52), the holding member (3) is engaged with the support member (4) so as to be reciprocally slidable only in the vertical direction without rotating. There is. As shown in FIG. 3, an engaging groove (35) for positioning is provided on the end surface (34) of the holding member.
Is provided and is engaged with the spherical pressing portion (60) of the pressing member (6) screwed to the support member (3). The spherical pressing portion (60) has a pressing force by the spring (61), and this pressing force sets the position of the engagement groove (35), that is, the initial position of the holding member (3) with respect to the support member (4). It is configured to hold. Then the rotation center O _W of the mating workpieces as shown in FIG. 4 (9), when there is a deviation in the mounting position the center C of the two knurled piece, self-aligning feature how embodiments of the present invention Explain if it works.
If the knurled piece mounting position center C as shown in FIG. 4 is displaced downwards with respect to the rotation center O _W of the mating workpiece (9), for knurling, close the knurled piece to the other workpiece (9) First, the upper knurled piece (1) begins to come into contact with the outer periphery (91) of the mating workpiece.
Then, a reaction force F _W from the mating processed material (9) is generated in the knurled piece (1) as shown in the figure. The vertical component Fwsin θ of this reaction force F _W acts as a force for moving the knurling piece (1) upward, and consequently acts as a force for moving the holding member (3) upward. When the moving force becomes stronger than the holding force of the holding member (3) by the pressing member (6) described above, the holding member (3) starts to slide above the holding member (3). The moving force, which is a component of the knurled rolling force, is generally larger than the holding force from the pressing member (6), and as a result, as shown in FIG. 5, the two knurled pieces (1) ( 2) simultaneously comes into contact with the outer periphery (91) of the mating processed material, and the force component Fw in the vertical direction
The holding member (3) moves to a position where sin θ is in balance. This state is a state in which mating workpieces rotation center height of O _W and knurled piece mounting position center C coincides initially deviation is corrected namely self-aligning. If knurling is performed in this state, a uniform rolling force is generated with respect to the mating material (9), so that a uniform and clean knurled finished surface can be obtained. In addition, in the combination of the guide pin and the guide hole in the present embodiment, the sliding portion is closer to a line contact instead of a surface contact, so that the resistance force during sliding is small,
It has the feature of smooth operation. Although not shown, it is clear that the guide member has a similar feature even if the guide pin is formed in the support member (4) and the guide pin is press-fitted and fixed to the holding member (3) while being fitted in the guide hole. is there. Further, in the present embodiment, the initial position of the holding member (3) is set so that the mounting position center C of the two knurled pieces and the mounting portion upper surface (41) of the supporting member (4) are aligned with each other. when mounting the tool fixed base of the machine device using the knurling apparatus of the present embodiment so as to substantially coincide with the attachment position the center C of the rotation center O _W and knurled piece (1) (2) of the mating workpiece (9), positioning It is effective in facilitating.

FIGS. 6 and 7 show another embodiment in which the number of guide pins (5) is one for the sake of downsizing. FIG. 6 is a front sectional view of the embodiment, and FIG. 7 is a plan view. If the number of guide pins is one, the holding member (3) will rotate around the guide pin (5), so it is necessary to stop the rotation of the holding member (3). Therefore, the retaining member (3) has a rotation stop hole (3
3) is provided, and a detent pin (53) slidably engaged with the detent hole is provided. The rotation stop pin (5
3) is press-fitted and fixed to the support member (4). In addition,
In this embodiment, the detent portion is provided at one place for downsizing, but it is obvious that a plurality of detent portions may be provided considering the function of the detent.

FIGS. 8 and 9 show another embodiment in which the spring member (62) is directly used for setting the initial position and holding of the holding member (3) with respect to the support member (4) instead of the pressing member. 8 is a front view cross section of the embodiment, and FIG. 9 is a plan view. In this embodiment, the guide pin (5) is the holding member (3).
Is engaged with and fixed to and is slidably engaged with a guide hole (40) formed in the support member (4). By mounting the spring (62) on the guide pin (5) and disposing both ends of the spring (62) between the holding member (3) and the supporting member (4), the holding member (3) is The restoring force of the spring (62) sets and holds the support member (4) at a certain fixed position. In order to prevent the rotation of the holding member (3), the detent pin (53) press-fitted and fixed to the holding member (3) and the detent hole (43) fitted with the detent pin are provided on the support member (4). Has been drilled.

[0009]

According to the self-centering type knurling device of the present invention, when the support member is mounted on the blade fixing base of a machine such as a lathe, the center of rotation of the mating workpiece and the center of the mounting positions of the two knurled pieces. Even if there is some misalignment, the knurling piece will be vertically symmetrical and evenly contact the outer periphery of the mating material due to the self-centering function during processing, which enables uniform knurling. Up to now, the time required for adjustment is no longer required, and centering skills are no longer required, and anyone can easily obtain a uniform and clean knurled surface. Further, as is apparent from the embodiment, the mechanism to be added is simple, and the knurling device is smaller and lighter in weight and size than the conventional self-centering type, and is easy to install. -It is also excellent in workability.

[Brief description of drawings]

FIG. 1 is a front view (cross-sectional view BB) of an embodiment of the present invention.

FIG. 2 is a plan view of an embodiment of the present invention.

FIG. 3 is a detailed view of part A of the embodiment of the present invention.

FIG. 4 is an action diagram of force according to the embodiment of the present invention.

FIG. 5 is a force balance diagram of the embodiment of the present invention.

FIG. 6 is a front view (cross-sectional view) of another embodiment of the present invention.

FIG. 7 is a plan view of another embodiment of the present invention.

FIG. 8 is a front view (cross-sectional view) of another embodiment of the present invention.

FIG. 9 is a bottom view of another embodiment of the present invention.

FIG. 10 is a view showing a conventional knurling device in use.

FIG. 11 is a diagram showing a conventional knurling device in use.

FIG. 12 is a force balance diagram of a conventional knurling device.

[Explanation of symbols]

 1 Knurled piece 2 Knurled piece 3 Holding member 4 Supporting member 5 Guide pin 6 Pressing member 7 Pin 8 Pin 9 Mating material 30 Guide hole 31 Guide hole 32 Guide hole 33 Anti-rotation hole 34 Holding member end face 35 Positioning engagement groove 40 Guide hole 41 Support member mounting part upper surface 42 Adjustment plate 43 Support shaft 44 Tool holder fixing base 51 Guide pin 52 Guide pin 53 Rotation stop pin 60 Pressing member spherical pressing part 61 Spring 62 Spring 91 Outer periphery of mating processed material

Claims (2)

[Claims] 1. A holding member (3) in which two knurled pieces (1) and (2) are rotatably supported and engaged by pins (7) and (8) is mounted and fixed to a mechanical device or the like. A support member (4) having a portion is slidably engaged in the vertical direction, the initial position of the holding member (3) is held and set by the restoring force of an elastic member such as a spring, and any knurl piece A self-centering knurling device characterized in that the holding member (3) slides vertically with respect to the support member (4) by an external force applied to the knurling device. 2. One or a plurality of guide pins locked to the support member (4) or the holding member (3) and one or a plurality of guides drilled in the holding member (3) or the support member (4). Due to the engagement with the hole, the holding member (3) is slidably engaged with the support member (4), and the holding member (3) is a guide pin or a detent pin (5).
3. The knurling device according to claim 1, wherein the knurling device is engaged by 3) so as not to rotate.