JPH0611730Y2 - Camshaft processing equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention mainly relates to a camshaft machining apparatus for positioning a camshaft material in the longitudinal direction.

[Conventional technology]

Conventionally, when processing the camshaft C shown in FIG. 5, it is necessary to perform centering hole processing as a positioning reference and end face milling processing. These centering hole and end surface are
The forged camshaft material is processed by the camshaft processing device.

To explain the positioning of the material for the camshaft in the camshaft processing device, set the forged material for the camshaft on the temporary bracket, and then position the journal or cam gear of the material for the camshaft on the stand in the longitudinal direction. Positioning is performed by positioning the camshaft material by a mechanism so that the camshaft material is floated upward by an appropriate amount, and both ends of the camshaft material are gripped by the positioning holders.

FIG. 6 and FIG. 7 each show an example of a mechanism for positioning different kinds of camshaft materials in the longitudinal direction in the camshaft processing apparatus.

As shown, the journal 3 of the camshaft material 31
The camshaft blank 31 is positioned in the longitudinal direction by the engagement of 1A with the V-shaped recess 32A having the tapered surface 32B of the positioning block 32. The positioning block 32 is pressed by the spring 33, and when both ends of the camshaft material 31 are grasped by the positioning holders (not shown), the camshaft material 31 can be floated upward by an appropriate amount. .

As the camshaft, the one shown in Japanese Utility Model Laid-Open No. 61-30750 is known in addition to the one shown in FIG.

[Problems to be solved by the invention]

However, even if it is attempted to process various types of camshaft blanks 31 having different journals or cam gear widths, the positioning block 32 and the spring 33 having different V-shaped recesses 32A have different width dimensions.
It is necessary to prepare and replace each item, which requires a lot of setup time.

Further, it is difficult to confirm whether or not the camshaft material 31 is reliably positioned in the longitudinal direction, and a defective product has occurred.

[Purpose of device]

The present invention has been made to solve the above-described problems, and an object thereof is to reduce the number of setup steps in the longitudinal direction when positioning camshafts of various specifications, and to position the camshaft in the longitudinal direction. It is an object of the present invention to provide a camshaft processing device capable of easily checking whether or not the camshaft is processed.

[Means for solving problems]

In order to achieve the above object, the present invention positions and positions a cam shaft having a journal and a cam gear set in a temporary metal fitting of a cam shaft processing device in a longitudinal direction by a longitudinal positioning mechanism provided in a stand. In a camshaft machining apparatus for machining by holding a camshaft by a positioning holder in a state where it is lifted up a proper amount above the temporary receiving bracket without changing the position in the longitudinal direction, the longitudinal positioning mechanism includes a substrate and a journal. Alternatively, a moving rod provided on the substrate that is disposed at the position of the cam gear and operates at a right angle to the longitudinal direction of the cam shaft, and a moving rod that is disposed on both ends of the moving rod and is linked to each other via a plurality of link plates Has a sliding part with the sliding part on the side as a guide, and moves in the longitudinal direction of the camshaft. A pair of slide bars, provided to each of the slide bar constituted by a pair of alignment ferrule gripping a journal or cam gear of the camshaft,
The longitudinal positioning mechanism is provided with a follow-up support device that raises the camshaft by an appropriate amount following the holding of the positioning holder.

[Function of device]

 The operation of the present invention will be described.

When the moving rod is positioned in the journal and operated at a right angle to the longitudinal direction of the cam shaft, the hinge joint portion at one end of the link plate linked to the moving rod is displaced. Therefore, the link plate is pulled while being rotated by the moving rod, and the hinge joint portion at the other end of the link plate linked to the slide bar is about to move. The moving part is guided by the slidable part provided on the board side to move in the longitudinal direction of the camshaft, and the positioning metal fixture grips the camshaft journal or cam gear to position the camshaft in the longitudinal direction. It

After that, the positioned camshaft is lifted up and held by the positioning holder by an appropriate amount, but following this, the camshaft rises by an appropriate amount while the longitudinal direction is positioned by the tracking support device. Accurately and reliably held by the positioning holder.

[Example of device]

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show a camshaft machining apparatus according to an embodiment of the present invention.

FIG. 3 shows a camshaft processing device. This camshaft processing device is provided with a centering hole and an end surface which serve as positioning references when processing the camshaft C (shown in FIG. 5).
It is processed from a forged camshaft material.

In the figure, 1 is a material for a camshaft to be processed, 2 is a stand, and 3 is a temporary receiving metal fitting for receiving a material for a camshaft, which is provided on the stand 2. Reference numeral 4 denotes a longitudinal direction positioning mechanism that determines the position of the cam shaft 1 in the longitudinal direction, and is attached to a follow-up support device 41 (shown in FIG. 4) provided on the stand 2. 5A and 5B are positioning holders, which are synchronized by a rack-and-pinion type synchronization mechanism (not shown) connected to the hydraulic cylinder 6 to synchronize the end 1 of the camshaft blank 1.
Proximity to A and 1B, hold and hold them. Reference numeral 7 denotes a cutting blade for centering and milling the end surface of the camshaft blank 1.

Next, the longitudinal positioning mechanism 4 will be described with reference to FIGS. 1, 2, and 4.

As shown in the figure, a moving rod 9 is provided between the metal bearings 8A and 8B of the base plate 8 and operated by the rod cylinder 10 at right angles to the longitudinal direction of the camshaft blank 1.

A pair of slide bars 11 are arranged on both sides of the moving rod 9, and are sandwiched between the substrate 8 and the plate material 81. The slide bar 11 is the link plate 1
2, 12 are linked together. That is, the hinge coupling portion 12A at one end of the link plate 12 is linked to the moving rod 9 by the hinge pin P, and the hinge coupling portion 12B at the other end of the link plate 12 is hinge pin P.
Is linked to the slide bar 11. The slide bar 11 has a sliding portion 11A, is guided by a sliding portion 8C provided on the substrate 8, and moves in the longitudinal direction of the camshaft blank 1.

13 is a positioning fitting provided on the slide bar 11,
Grasp the journal 1C of the camshaft material 1.

Next, the operation of this embodiment will be described.

First, as shown in FIG. 3, the forged camshaft material 1 is set in the temporary receiving metal fittings 3, 3, and then the journal 1C of the camshaft material 1 is provided on the stand 2 in the longitudinal positioning mechanism. Positioning is performed in the longitudinal direction by 4. This will be described in detail with reference to FIGS. 1, 2, and 4.

In the figure, when the moving rod 9 is actuated by the rod cylinder 10 at right angles to the longitudinal direction of the camshaft blank 1, the hinge coupling portion 12A at one end of the link plate 12 linked to the moving rod 9 is displaced. Therefore, the link plate 12 is moved to the moving rod 9
The hinge connecting portion 12 at the other end of the link plate 12 that is pulled while rotating to
Although B is about to move, both slide bars 11 pulled by the link plate 12 are guided by the sliding portions 8C provided on the substrate 8 at their sliding portions 11A, so that the material 1 for the camshaft is After moving in the longitudinal direction, the journal 1C of the camshaft blank 1 is gripped by the positioning fittings 13, 13.

Therefore, the longitudinal position of the camshaft blank 1 is positioned.

The positioning holders 5A and 5B are connected to the hydraulic cylinder 6
Of the camshaft material 1 in close proximity to each other by a synchronizing mechanism (not shown).
Grab and hold A and 1B. In this state, the temporary bracket 3
The material 1 for the camshaft set in step 1 floats upward by an appropriate amount. At this time, since the camshaft material 1 is held by the positioning metal fittings 13, 13 of the longitudinal positioning mechanism 4, a follow-up supporting device is required so that the camshaft material 1 can be freely lifted upward by an appropriate amount. Reference numeral 41 in FIG. 4 indicates this follow-up supporting device, and the positioning fittings 13, 1
The material 1 for the camshaft held by 3 is then lifted up and held by an appropriate amount by the positioning holders 5A and 5B. Following this, the longitudinal positioning mechanism 4 is centered on the fulcrum 41A. From the position shown in FIG. 4, circular movement is made as shown by the arrow, and the support portion 41B slides. Then, the material 1 for the camshaft is lifted by an appropriate amount while the longitudinal direction is positioned from the temporary receiving fitting 3, and both ends 1A, 1B thereof are accurately and surely held by the positioning holders 5A, 5B. The material for camshaft 1
When the end portions 1A and 1B of the are not held by the positioning holders 5A and 5B, the follow-up support device 41 is in the position shown in FIG.

When the positioning of the camshaft blank 1 is completed, the cutting blades 7, 7 move forward, and the camshaft milling device accurately performs centering hole machining of the camshaft blank 1 and end face milling. Positioning holder 5
A and 5B retreat when the processing is completed.

According to the above configuration, when trying to position the camshaft material 1 of various types, even if the width of the journal 1C varies depending on the camshaft material 1, the camshaft material 1 having different dimensions is used. The width of the positioning metal fittings 13, 13 of the longitudinal positioning mechanism 4 changes corresponding to the journal 1C of FIG. 1, and the longitudinal positioning of the camshaft blank 1 can be performed in that state, and positioning is performed as in the conventional example. It is not necessary to prepare and replace the block 32 and the spring 33 for each material for the camshaft, the work can be performed quickly, and the setup time can be shortened.

Further, since it is sufficient to move the positioning fittings 13 and 13 according to the size of the journal 1C of the camshaft material 1, it is possible to easily determine whether or not the camshaft material 1 is reliably set on the positioning fitting 13. It can be confirmed and can be positioned accurately. Therefore, the generation of defective products can be reduced.

In addition, in the present embodiment, the processing of the end surface portion of the material for the camshaft is described as the processing object, but it may be applied to the camshaft in the process of processing from the material for the camshaft to the camshaft as the finished product. it can.

Further, in the present embodiment, the sliding portion 11A of the slide bar 11 is guided by the sliding portion 8C provided on the substrate 8. However, the sliding portion 11A may be provided on the plate member 81 to guide the sliding portion 11A. You can also

Further, in the present embodiment, the journal 1C of the camshaft blank 1 is used as a positioning portion,
The cam gear of the material 1 for a camshaft can also be used as a positioning part.

[Effect of device]

As described above, according to the camshaft machining device of the present invention, when positioning camshafts of various specifications,
Since it is not necessary to prepare a large number of positioning blocks having different width dimensions, the positioning can be performed quickly, the number of setup steps in the longitudinal direction can be reduced, and it can be easily confirmed whether or not the positioning is performed.

However, the camshaft, which is positioned accurately by the longitudinal positioning mechanism and is positioned by the follow-up support device that follows the holding of the positioning holder, moves upward from the temporary bracket without changing the position in the longitudinal direction. The excellent effect that the camshaft is accurately processed by accurately holding it in the lifted state can be exhibited.

[Brief description of drawings]

FIG. 1 is a front view of a longitudinal positioning mechanism of a camshaft machining apparatus according to an embodiment of the present invention. FIG. 2 is an operation explanatory view of the longitudinal positioning mechanism. FIG. 3 is an overall front view of the camshaft processing device. FIG. 4 is a side view of the longitudinal positioning mechanism and the follower support device. FIG. 5 is a perspective view of the camshaft. 6 and 7 are explanatory views of a conventional longitudinal positioning mechanism for a camshaft. [Explanation of symbols of main parts] 1 ... Camshaft material 1C ... Journal 2 ... Stand 3 ... Temporary bracket 4 ... Longitudinal positioning mechanism 8 ... Substrate 8C ... Sliding part 9 ... … Moving rod 11 …… Slide bar 11A …… Sliding part 12 …… Link plate 13 …… Positioning metal fitting.

Claims (1)

[Scope of utility model registration request] 1. A camshaft having a journal and a cam gear set on a temporary metal fitting of a camshaft machining apparatus is longitudinally positioned by a longitudinal positioning mechanism provided on a stand, and the positioned camshaft is longitudinally moved. In a camshaft machining apparatus for machining by holding a positioning holder in a state where it is lifted up a proper amount from the temporary receiving metal without changing the position, the longitudinal positioning mechanism is arranged at the position of the substrate and the journal or cam gear. And a moving rod provided on the base plate that operates at a right angle to the longitudinal direction of the camshaft, and a moving rod that is arranged on both ends of the moving rod and is linked to each other through a plurality of link plates to provide an impact to the base plate. A pair of slide bars that move in the longitudinal direction of the camshaft and that have sliding parts that use the parts as guides. And a pair of positioning fittings provided on the respective slide bars for gripping the journal of the cam shaft or the cam gear, and the longitudinal positioning mechanism thereof follows the holding of the positioning holder to raise the cam shaft by an appropriate amount. A camshaft processing device characterized in that a supporting device is provided.