JPH047870Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a positioning device for camshaft processing, which is used for processing a distributor groove at the end of a camshaft shaft.

(Prior Art) Generally, a distributor configured to determine ignition timing is connected to one shaft end of a camshaft, and a diametrical groove is formed for coupling with the distributor. There is. The direction and depth of the groove are extremely important in determining the positional relationship between the camshaft and the distributor. Therefore, when machining a distributor groove on a camshaft, the groove cutting process is performed after the phase and axial position of the camshaft have been defined.

Conventionally, when performing the above-mentioned phasing and axial positioning, the phasing pin, which defines the phase of the camshaft and determines the machining direction of the groove for the distributor, and the axial position of the camshaft, which determines the machining direction of the distributor groove, are used. A machining reference flange that determines the machining depth of the groove is formed on the camshaft, and these phasing pins and the machining reference flange are manually pushed into a fixed guide provided on the processing device. was.

(Problems to be solved by the invention) When the phasing pin and machining reference flange formed on the camshaft are pushed into the fixed guide on the processing equipment side as in the conventional example described above, it is extremely difficult to take out the camshaft after machining is completed. The problem was that the workability was poor. This has been a major obstacle in achieving automatic conveyance of the camshaft to processing equipment.

This invention was made in view of the above points,
The purpose of this invention is to enable automatic conveyance of a camshaft and to smoothly perform phase determination and axial positioning.

(Means for Solving the Problems) In the present invention, as a means for solving the above problems, a positioning device for camshaft processing is provided for processing a groove for a distributor at the end of a camshaft shaft. The camshaft is composed of a pedestal for holding the camshaft in position, a clamp member for clamping and fixing the camshaft to the pedestal, and a floating table resiliently installed to levitate the camshaft from the pedestal when unclamping. A phasing pin guide that guides a phasing pin eccentrically provided at the end of the camshaft in the vertical direction during clamping to define the phase of the camshaft and determine the machining direction of the distributor groove, and the axial position of the camshaft. In order to determine the machining depth of the distributor groove by defining the machining depth of the distributor groove, a machining reference flange guide is attached that guides a machining reference flange formed on the camshaft in the vertical direction during clamping.

(Function) In the present invention, the following effects can be obtained by the above means.

In other words, the camshaft placed on the floating platform is
In the process of being pressed against the pedestal by the clamping action of the clamp member, the phasing pin and machining reference flange are positioned while being guided by the phasing pin guide and the machining reference flange guide, respectively, thereby automatically phasing and axis adjustment. The direction positioning is determined, and in this state, a distributor groove is cut into the end of the camshaft shaft. After the cutting process is completed, the camshaft is automatically levitated by the upper movement of the levitated table simply by releasing the clamping action of the clamping member (in other words, unclamping). At this time as well, the phasing pin and the machining reference flange are guided by the phasing pin guide and the machining reference flange guide, respectively, and moved upward in the same manner as described above. In other words, the positioning and removal of the camshaft are automatically performed by the clamping and unclamping actions of the clamp member and the upward movement of the floating table.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The positioning device 2 for camshaft processing according to this embodiment is provided at a processing station C for positioning the base 1 in a camshaft processing device A, as shown in FIG. The camshaft 7 is transported to the station C by a lift-and-carry transport device B. A distributor groove 9 is cut into one shaft end of the camshaft 7 that is positioned and fixed to the positioning device 2 by a cutter 8 of the cutting device 3. The distributor groove 9 is provided for coupling a distributor to the shaft end of the camshaft 7.

As shown in FIG. 1, the positioning device 2 includes a cradle 4 that holds one end of the camshaft 7 transported by the transport device B at a processing position
, a clamp member 6 for clamping and fixing the camshaft 7 to the pedestal 4, and a floating pedestal 5 resiliently installed to levitate the camshaft 7 from the pedestal 4 during unclamping. The other end side of the camshaft 7 is connected to a floating table 5 and a clamp member 6.
It is designed to be held under pressure by. The floating table 5 is provided at the upper end of rods 16, 16 which are vertically movably fitted into a pair of guide tubes 15, 15 provided in the vertical direction on the base 1. It is urged upward by springs 17, 17 fitted therein. The spring 17 needs to have a biasing force sufficient to lift the camshaft 7 during unclamping. Further, on the upper surface of the floating table 5, an arcuate receiving portion 5a for receiving the camshaft 7 is formed. Code 18 and 19
are stoppers for regulating the lower and upper limits of movement of the floating platform 5.

The clamp member 6 is an L-shaped member provided on the base 1 at the upper end of the piston rod 21 of the cylinder 20 that operates in the vertical direction. A portion 6a is formed (see FIG. 5).

On the other hand, the camshaft 7 has a phase determining pin 10 which is eccentrically protruded from the shaft end on the side opposite to groove machining and is used to define the phase of the camshaft 7 and determine the machining direction of the distributor groove 9; It has a machining reference flange 11 formed on the camshaft 7 closer to the phase determining pin 10 side and for defining the axial position of the camshaft 7 and determining the machining depth of the distributor groove 9. The phase determining pin 10 is connected to the cam piece 1 of the camshaft 7.
The machining reference flange 11 is formed to correspond to the direction (in other words, the phase) of the nose portions 12a, 12a... of the camshaft 7 when the camshaft is set. It is formed to keep the distance between the two points constant.

Thus, the camshaft 7 set on the pedestal 4
A groove-shaped phase determining pin guide 13 is provided at a position corresponding to the phase determining pin 10 for guiding the phase determining pin 10 in the vertical direction when the camshaft 7 is clamped. The phasing pin guide 13 is provided on a support member 22 erected on the base 1, and is formed of a notched groove in the vertical direction. Further, at a position corresponding to the machining reference flange 11 of the camshaft 7 set on the pedestal 4, a machining reference flange guide 14 that guides the machining reference flange 11 in the vertical direction when the camshaft 7 is clamped is provided on the pedestal. It is supported by 4. The processing reference flange guide 14 has a fixed piece 14a fixed to the pedestal 4.
and a movable piece 14b, which is supported by a pair of rods 23, 23, which are provided on the pedestal 4 and which pass through the fixed piece 14a, so as to be able to move forward and backward. The fixing piece 14a is biased toward the fixing piece 14a. That is, the working reference flange 11 of the camshaft 7 is moved between the fixed piece 14a and the movable piece 14 by the urging force of the springs 24, 24.
b. Note that the upper end portions of the fixed piece 14a and the movable piece 14b are sloped portions to facilitate insertion of the processing reference flange 11.

Next, the operation of the illustrated positioning device for camshaft processing will be explained.

The camshaft 7 transported by the transport device B is placed on the floating tables 5, 5 as shown in FIG. The floating platforms 5, 5 resist the urging force of the springs 17, 17.
It is pushed down to the lower limit of movement and held on the pedestal 4. During this process, the phasing pin 10 and the machining reference flange 11 provided on the camshaft 7
are guided and positioned by the phasing pin guide and the machining reference flange guide 14, respectively,
The camshaft 7 is positioned at a predetermined processing position (ie, a position where the phase and depth of the distributor groove 9 are defined) (see FIG. 2). Under this condition, a distributor groove 9 is cut into the shaft end of the camshaft 7 by the cutter 8 of the cutting device 3. After the cutting process is completed, when the cylinders 20, 20 are actuated to release the clamping action by the clamp members 6, 6 (that is, to unclamp the state), the floating platform 5 is , 5 are automatically floated up to the initial transport position (the position shown in FIG. 3). Also at this time, the phasing pin 10 and machining reference flange 11 of the camshaft 7 are guided by the phasing pin guide 13 and the machining reference flange guide 14, respectively, and are smoothly moved upward. Thereafter, the camshaft 7 placed on the floating tables 5, 5 is carried out by the conveyance device B, and at the same time, the camshaft 7 to be processed next is transferred to the conveyance device B.
As a result, it is placed on the floating tables 5, 5, and automatic transportation becomes possible.

It goes without saying that the present invention is not limited to the embodiments described above, and that the design can be modified as appropriate without departing from the gist of the invention.

(Effects of the Invention) As described above, according to the present invention, a camshaft processing positioning device for processing a distributor groove at the end of a camshaft shaft includes a pedestal for holding the camshaft in a processing position, and a cradle for holding the camshaft in a processing position; It consists of a clamp member that clamps and fixes the camshaft to a pedestal, and a floating pedestal that is elastically installed to levitate the camshaft from the pedestal when unclamping. A phasing pin guide that guides a phasing pin eccentrically provided at the end of the camshaft vertically during clamping to determine the machining direction of the camshaft groove, and a distributor groove that defines the axial position of the camshaft. In order to determine the machining depth of the camshaft, the camshaft is equipped with a machining reference flange guide that guides the machining reference flange formed at the appropriate position in the vertical direction during clamping. During the clamping process, the phasing pin and the machining reference flange are guided by the phasing pin guide and the machining reference flange guide, respectively, so that the clamping and unclamping actions of the clamping member and the upper movement of the floating platform are combined. As a result, the camshaft is automatically positioned and taken out, making it possible to automate the transportation of the camshaft, and has the practical effect that phase determination and axial positioning can be performed simultaneously and smoothly.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing a positioning device for camshaft processing according to an embodiment of the present invention, FIG. 2 is an enlarged view of the main part of FIG. 1, and FIG. 2nd when clamping
Figure 4 is a sectional view of Figure 3, Figure 5 is an enlarged view of Figure 1 in the direction of the X arrow, and Figure 6 is a cross-sectional view of Figure 1.
FIG. 2 is a plan view showing a camshaft processing device including the illustrated positioning device for camshaft processing. 4... pedestal, 5... floating table, 6... clamp member, 7... camshaft, 9... groove for distributor, 10... phase determining pin, 11... processing reference flange, 13... phase Set pin guide, 1
4...Processing standard flange guide.

Claims (1)

[Scope of utility model registration request] The device is for machining a distributor groove at the end of a camshaft shaft, and includes a pedestal for holding the camshaft in a processing position, a clamp member for clamping and fixing the camshaft to the pedestal, and a clamp member for clamping and fixing the camshaft to the pedestal, and when unclamping the camshaft. a floating platform resiliently installed to levitate the camshaft from the pedestal; and a phase determining pin eccentrically provided at the end of the camshaft to define the phase of the camshaft and determine the processing direction of the distributor groove. A phasing pin guide that guides the camshaft in the vertical direction when clamping, and a machining reference flange formed on the camshaft to define the axial position of the camshaft and determine the machining depth of the distributor groove in the vertical direction when clamping. A positioning device for machining a camshaft, comprising a machining reference flange guide for guiding.