JPS6018259Y2 - Fine adjustment device for the cutting blade in the die head of a thread cutting machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for finely adjusting the cutting blade in the gouging head of a screw cutting device for carving a screw into the end of a pipe or rod.

The gouging head is a well-known technology in which a cutting blade is advanced or retreated in the radial direction from the center of the gouging head by the degree of rotation of a cam plate that is fixed to the machine body and can rotate concentrically with the main body of the gouging head.

This invention relates to a position for finely adjusting the movement of the cutting blade in the radial direction.

The above fine adjustment refers to the adjustment within a small range before and after a predetermined position by a fraction of the difference in height between 11" and 1 valley in the thread cut by the cutting blade. This is a device that can arbitrarily adjust the degree of ingress and egress of the cutting blade, which was previously impossible to do by adjusting the degree of rotation between the cam plate and the main body.

In this invention, the conventional Goo head that can perform basic operations is linked with an automatic thread cutting section setting function that is not directly related to the basic technical idea of this invention.

Next, an embodiment of this invention will be described with reference to the drawings. The goo head 1 is composed of three main members: a main body 2, a cam plate 3, and a lid 4. Each of these main members has the same axis. An insertion hole 5 into which a cut object can be inserted is bored in the center, and chaser sliding grooves 6 are formed radially around the axis of the insertion hole 5 on the inner surface of the main body 2. 7, and a cam plate 3 provided on one side with a tomb-shaped cam groove 9 that provides a sliding motion to the operating claw 8 protruding from the chaser 7 is connected to the operating claw 8 and the cam groove 9. The lid body 4 and the main body 2 are pivotally connected to each other so that the lid body 4 and the main body 2 can rotate freely, with the cam plate 3 being sandwiched between them. In the Goui head 1, the end of the opener 11 is engaged with the diameter position of the insertion hole 5 in a bearing 10 provided, and the other end extending in the radial direction is pivotally supported by a shaft 12. An arc-shaped sliding groove 13 is recessed on a concentric circular line, and a sliding member 14 that engages with the sliding groove 13 to be freely slidable is fitted into the sliding groove 13.
A bullet 15 is engaged with and connected to a part of the sliding groove 13, and the bullet 15 acts to always press the sliding member 14 against one of the stoppers 16 provided at both ends of the sliding groove 13. Giving (gives counterclockwise action in the figure).

). In addition, a shaft 1 is attached to a bearing 10 provided on the outside of the main body 2.
2, the shaft 12
One end of the spring 17 engaged with the spring 17 is engaged with the main body 2 and the other end is engaged with the opener 11 so that the opener 11 always rotates toward the main body 2. The surface that contacts the outside of the main body 2 bulges inward to protrude the locking part 18, and the locking part through hole 19 passes through the sliding groove 13 at the part where the locking part 18 contacts.
is bored so that the locking part 18 of the opener 11 can protrude into the sliding groove 13, and resists the elasticity of the bullet 15, which is equipped with a sliding member 14 that can slide inside the sliding groove 13. At the position where the opener 11 slides and locks with the stopper 16', it engages with an engaging groove 20 drilled at a position where the protruding portion of the locking portion 18 of the opener 11, which is a part of the sliding surface, makes contact. Then, the opener 11 moves the spring 1 around the shaft 12.
Unless the sliding member 14 rotates against the elastic force of the bullet 7, the sliding member 14 is formed so as to remain immobile against the bullet 15.

A recess 21 is provided in a part of the upper side of the sliding member 14, and the cam plate connecting piece 22 is pivotally mounted so as to be rotatable from the axial direction of the main body 2 toward the outer surface of the main body 2.

A vertical groove 23 is formed on the inside of the cam plate connecting piece 22 so as to match the radial extension line from the axis of the insertion hole 5 of the main body 2.
The upper end is provided with a handle portion 24 for rotational operation.

Cam plate 3 corresponding to main body 2 configured as above
In this case, an operating part 25 is made to protrude from the outer periphery of a part of the annular main part, an operating bundle 26 is made to further protrude from a part of the operating part 25, and a fine adjustment mechanism 27 is provided.

This fine adjustment mechanism 27 has two sets of the types of objects to be cut, such as pipes or rods, which can be threaded with this Goo head 1, that is, the number of types of thickness according to the JIS standard, for example, two types, If there are three types, three sets are provided depending on the types that can be cut, and the drawings of this invention show a case where two sets of fine adjustment mechanisms 27 are installed for convenience.

The fine adjustment mechanism 27 operates in a diagonal line α through an acute angle θ with the radial extension line R from the axis of the insertion hole 5 as a reference. It may also be a direction, so it is not limited to this.

An operation shaft 29 made of a threaded rod is installed outside the upper and lower ends of the guide groove 28 centered on this diagonal line α in the longitudinal direction and along the diagonal line α.
and is rotatably supported, and this operating shaft 2
A short rod-shaped adjustment piece 30 having a female thread carved in the center in the longitudinal direction is screwed into the male threaded portion 29' of the guide groove 28, and both ends thereof are projected outward from the openings at both ends of the guide groove 28, and the adjustment piece 30 is operated. The adjustment piece 30 screwed together with the rotation of the shaft 29 is prohibited from operating in the same manner as the rotation of the operating shaft 29 due to the restriction of the guide groove 28, and is guided by the guide groove 28 to advance and retreat along the diagonal line α. It is designed so that it can be done.

A part of the adjusting piece 30 screwed onto the operating shaft 29 projects from the guide groove 28, and the vertical groove 23 is recessed in the cam plate connecting piece 22 which is pivotally connected to the sliding member 14 on the main body 2 side. This is to engage the

The basic configuration of the fine adjustment mechanism 27 has been explained above, and in order to facilitate the manufacture and installation of the fine adjustment mechanism 27, it is constructed as shown in Figure 5. The operation is exactly the same as the above basic configuration.

That is, an elongated guide hole 32 that opens on both sides in the longitudinal direction of a guide frame 31 that can fit into the guide groove 28 is formed, and an adjustment piece 30 having the same structure as described above is passed through the guide hole 32. The male thread 29' of the operating shaft 29, which is inserted from one longitudinal end of the guide frame 31 with both ends engaged with the guide holes 32 on both sides, is inserted into the female thread drilled in the longitudinal center of the adjustment piece 30. After screwing together, the unthreaded portions located at both ends of the male threaded portion 29' are rotatably pivoted at both ends of the guide frame 31 forming both ends of the guide hole 32]. The protruding part is the rotation operating part 33, and the top surface thereof is provided with an engagement hole for a hexagonal wrench or a screwdriver, and screwed together by the rotational movement of the waist so that it can rotate freely. Adjustment piece 3
0 can move forward and backward within the guide hole 32 according to the degree of screwing, and the guide frame 31 thus constructed can be inserted into the guide groove 2.
8, fit and insert 1~, and fix.

As described above, this fine adjustment mechanism 27 is equipped with a number of types that can perform cutting operations on the scale of the die head 1, and the edges of the guide groove 28 and the guide hole 32 are arranged so that the degree to which the adjustment piece 30 moves forward and backward can be immediately sensed. A scale 34 is attached to facilitate the operation, and a projection I is attached to the protruding end 30' of the adjustment piece 30 on the opposite side.
22 is cut out at 17 so that it can be raised and engaged with a vertical groove 23 provided on its vertical surface.

Next, the difference in explaining the operation of this device is that in a general die head, the chaser moves in the radial direction according to the degree of sliding rotation between the main body and the force t1/-). In this invention, the main body 2 and the campu l/
By slightly rotating the sliding rotation with the guide plate 3, the center pointing distance of the Cheza-7 can be slightly changed.

11j In the fine adjustment mechanism 27, both ends of the movable range of the adjustment piece 30, which moves forward and backward by applying rotational motion to the operating shaft 29, are set in the radial direction of the cam play 1-3, and the ends of the movable range of the adjustment piece 30 are set in the radial direction of the starting end X of the movable range. If we connect the radial direction of the terminal end y with the concentric circular line 2, we get the working distance l, and during this adjustment, the diagonal line The movable distance of the adjustment piece 30 becomes longer in proportion to the angle 0, and therefore the working distance 1 also becomes longer.In order to increase the accuracy of fine adjustment, the angle of the acute angle 0 can be increased to make fine adjustments. I can do it.

The direction of the operating movement of this adjusting piece 30 is shown in FIG. , Play) 1 to 1 in the diagonal direction that approximates the vertical direction to 3, but by increasing this acute angle 0 to 7 and making the movable distance of the adjustment piece 30 longer, the desired fine adjustment can be made more accurately. This movement is slid within the cam plate connecting piece 22 o JIR 23 and only the action in the two circular directions is transmitted to the cam plate h connecting piece 22 (1, this action is transferred to the cam plate h connecting piece 22 Then slide the sliding member 14 onto the main body 2 with a
The cam tz- 3 acts on the main body 2 by the amount of rotation 17, and the chaser 7 moves within the chaser sliding groove 6 in accordance with the amount of rotation.

The movement in and out of the conventional chaser in the radial direction is exclusively done by cam play!・Only sliding rotation is performed between the chaser and the main body, so it is very difficult to make minute movements in and out of the chaser, and it is a technology that is almost impossible to accurately achieve the desired minute movement under that operating state. In this invention, the desired degree of rotation a of the cam plate t-3 is achieved by movement by rotation of the adjustment piece 30, which is several ten times as large as the operation @29, and the movement means is actuated by a screw movement. Moreover, it has the effect of preventing occurrence of phenomena due to deviation from desired operation during the operation of the die and the rad.

[Brief explanation of drawings]

Figure 1 is a front view of Da, E\tsud, Figure 2 is a back view of Figure 1, Figure 3 is an exploded perspective view, and Figure 411? , in Figure 1 n-
5 is a rear view of the main part on the main body side, FIG. 6 is a rear view of the main part on the cam plate side, and FIG. 7 is an explanatory diagram of the operation of the fine adjustment mechanism. 1...Die\Rad, 2...Body, 3
......Force l, plate, 5...insertion hole, 7...Cheza~, 22...quad play 1. Connection piece, 23... ...Vertical groove, 28...
...Guide groove, 29...Operation shaft, 29'...
... Male thread part, 30 ... Adjustment piece, 33 ...
...Rotation operating part, R...Radial extension line, θ...Acute angle, α...Oblique line.

Claims (1)

[Scope of utility model registration request] A thread cutting machine that performs thread cutting on the outer periphery of a tube or rod, and a cam plate 3 that rotates concentrically with the main body 2 is an insertion hole through which the object to be cut passes according to the degree of rotation relative to the main body 2. In the head 1 in which the chaser 7 can be moved in and out in the radial direction from the center of the cam plate 3, an acute angle θ is formed on a part of the cam plate 3 using an extension line R in the radial direction from the axis of the insertion hole 5 as a reference. A guide groove 28 centered on the diagonal line α is provided, and a male threaded portion 29' provided at an intermediate position other than the pivot portion of the operating shaft 29 rotatably pivoted outside both ends of the guide groove 28 is provided with a central portion. A short rod-shaped adjustment piece 30 provided with a female thread is screwed together, and both ends thereof protrude from the guide groove 28.
The adjustment piece 30 is guided to the guide groove 28 by rotating the rotation operating part 33 provided at one end of the operating shaft 29, and is made to move forward and backward in the guide groove 28. A recess is installed on the side surface of the cam plate connecting piece 22, which is rotatably attached to the main body 2 at a position corresponding to the guide @ 28, and is aligned with a radial extension line from the axis of the insertion hole 5. , a fine adjustment device for a cutting blade in a screw head of a screw cutting device, in which one end of the protruding adjustment piece 30 can be detachably attached to the longitudinal groove 23.