JPS5910826A - Method and apparatus for measuring tension of piston ring - Google Patents

Abstract

PURPOSE:To measure a tension of a ring by connecting a pressing and pressure receiving means to one end part and the other end part of an annular jig having a gap respectively, measuring expanding and contracting states of a diameter of the jig through the annular jig, and measuring similarly the exapnding and contracting states of the diameter with fitting a piston ring to be measured. CONSTITUTION:A reference disc 3 is placed along an inner circumference of the jig 2 and the gap is decreased until the jig 2 and the disc 3 are fitted tightly. A driving source 5 is stopped in this state, a micrometer head 7 is controlled to move a touch switch 18 until it contacts with a dock 16. The positions of the prescribed expansion and contraction states of the jig 2 are decided by this operation. Then the disc 3 is detached and the piston ring to be tested is placed along the inner circumference of the jig 2, and a reciprocative driving source 5 is drived again to repeat the similar operation. The tension portion of the jig 2 is eliminated from the detected value, and is sent to a display memter 8 as a signal 17, and the value sent by the signal 17 and varying from moment to moment is displayed continually on the meter 8. This displayed value is the tension of the piston ring of prescribed circumference length reference in real circle state, and the tension basing on the circumference length as the reference can be measured.

Description

DETAILED DESCRIPTION OF THE INVENTION Misfire 1υ1 relates to a method for determining the tension of piston rings and an apparatus for implementing the method.

Conventionally, the force of a piston ring is measured by placing a wire or tape on the piston ring, pulling it until it reaches the current gap of the piston ring or reaching a specified dimension, and then measuring the tension of the wire or tape at that time by measuring the total spring tension of the wire or tape. However, -): In the force distribution method, the tension of the piston ring when the piston with the piston ring attached is installed in the cylinder, that is, the predetermined tension of the piston ring. Although it is desired to obtain tension based on the circumference, it is not easy to measure the circumference of the piston ring.・It has been difficult to measure the tension based on the diameter of the piston ring.

The present invention is intended to solve the problems described above, and its purpose and goal is to provide a piston ring tension measurement method that can measure tension based on the circumference of the piston ring. be. The feature of this invention is that a pressing means and a pressure receiving means are respectively connected to each end of a ring-shaped jig having a gap, and the suppressing force from the suppressing means is received by the pressure receiving means through the ring-shaped jig. The reference disk is tightly fitted into the ring-shaped jig so that the ring-shaped jig is stopped. −11, and then (ρ, 11 (the piston ring to be measured is replaced with the reference disk in I) by using the ring-shaped jig), and the diameter expansion/contraction state of the ring-shaped jig is 11 At this point, the tension of the piston ring is measured by determining the pressing force of the suppressing means when the measured state is reached.

Another object of the present invention is to provide a piston ring tension measuring device that is calibrated and capable of determining tension based on the circumferential length of the piston ring. The features of this invention include a ring-shaped jig having a gap and into which a piston ring can be fitted, and a ring-shaped jig having no. a pair of chucks that are removably clamped; a pressing means that is continuous with one of the chucks and presses the one chuck toward the other chuck; and the other of the chucks. a tension detection means that is connected to the one Q chuck and detects the pressing force acting on the one Q chuck via the ring-shaped jig and the other chuck; and measuring the expansion/contraction state of the ring-shaped jig; (ii) A control means for controlling the suppression means;

Hereinafter, a method for measuring the tension of a Z-piston ring according to the present invention will be explained with reference to drawing fC along with an actual example of a piston ring tension measuring curve "6" that implements the method.

In Fig. 114, 2], ζ l is the main body of the tension measuring device, in Fig. 3, 2 jig, in Fig. 5, 1. α
In Figure 6, 31 is a reference disk.

Tension Kun Rokuki I+7 Main body 1 includes a pair of chucks 4 and
+Knee 1=It is roughly composed of a reciprocating drive source 5 as a stage, a tension detector 6 as a tension detection means, a micrometer head 7 as a control 91I+ stage, and an indicator 8. A pair of chunks 4 include micrometers If, +2 anvils Ila, +2a and spindle 11b attached to one end of supporting h1S materials 9 and 10 (the left end and right end, respectively, in the figure).

12b are used as chucks 13 and 14. The chuck 13.14 is attached to the anvil 11a by rotating the simple llc, 12c of the micrometer 11.12.

The width of the gap between the spindle 12a and the spindles llb and 12b is adjusted, and the anvil lla
.

The jig 2 is clamped by pushing spindles 12a and 11b and 12b into a mounting hole 2a of the jig 2, which will be described later. Note that the holes 13 and 14 are not limited to micrometers, but may be of any type that can be pushed into the mounting hole 2a of the jig 2.

The reciprocating drive source 5 is connected to the other end (the right end in FIG. 1) of the support member 9, and its reciprocating drive is controlled by a stop signal 15 from a micrometer head 7, which will be described later.

That is, when the stop signal 15 is sent when measuring the tension of the piston ring, the reciprocating drive source 5 stops its driving. support member 9rfi,
It has a function of transmitting the suppressing force caused by the reciprocating drive I21i\5 to the jig 2 via the chuck I3, and is provided with a dog 16 at its tip. The support member 10 receives all of the pressing force through the jig 2 and the chuck 14, and further transmits the pressing force of the support member 10 to the tension detector 6. The tension detector 6 is disposed at the other end of the support member 10 (the left end in FIG. 1) and is biased toward the right in FIG. is detected by the tension shading detector 6, and the eye power detector 6 is designed to send a value obtained by eliminating the outside of the tension of the jig 2 accompanying the tension measurement VC from the detected value to the display meter 8 as a signal 17. There is.

The micrometer head 7 is attached to the support member 9 with l+iif
The spindle 7a of the micrometer head 7 is extendable and retractable by rotating the spindle 7b7 of the micrometer head 7, and a touch switch 18 is provided at the tip of the spindle 7a. ing. When the dog 16 comes into contact with this touch switch 8 as the support member 9 moves, a stop signal 15 and a holding number 19 are sent from the touch switch 18 to the reciprocating drives # and 5 and the display meter 8, respectively. It has become. The display meter 8 displays the tension of the piston ring, and when receiving only the signal 17 from the tension detection a6, the display meter 8 continues to display the value based on the signal 17, vl,
When the hold signal 19 from touch switch 8 is received, the value displayed on display meter 8 at that time is held. As shown, it is shaped like a ring 1 with a gap, and a fixture 2b is removably fixed to each opposing end forming the gap by a fixture 2C. Mounting tool 2b
A mounting hole 2a for clamping is bored in the.

These 2 jigs have 1 type of stage depending on the diameter of the piston ring to be measured, so that the piston ring to be measured (for example, a combination ring) and the reference disk 3 to be described later can be fitted therein. When the corresponding reference disk 3 is tightly fitted, the inner circumference of the jig 2 becomes a perfect circle.

The reference disk 3 has a thickness that allows it to fit into the jig 2, and the circumferential length of the reference disk 3 is the same as the inner circumferential length of the cylinder into which the piston to which the piston ring is attached is installed.
There are multiple types depending on the inner diameter of the cylinder with three reference discs.

Next, the effect will be explained.

First, a reference disk 3 (see FIGS. 4 and 5) having a predetermined circumferential length is placed along the inner circumference of the jig 2 shown in FIGS. 3 and 4,
The jig 2 is anvil lla.

12a, spindle llb, 12b and metal fittings are inserted into the tension measuring device 4 main body 1 by pushing them into the mounting hole 2a of the jig 2.Next, the reciprocating drive source 5 is turned on and the reciprocating drive #5 The supporting member 9 is moved to the left in FIG. In other words, the jig 2 and the reference circle +!i,3 are narrowed until they are tightly fitted.

When the jig 2 is in that state, the reciprocating drive source 5 is stopped, the simple micrometer hand door 7b is rotated, and the spindle 7a is moved to the support member 9 with the touch switch 18 attached to its tip. until it comes into contact with the dog 16 that is currently in use. As a result, the predetermined diameter expansion/contraction state of the jig 2 on the tension side i, that is, the predetermined circumferential length of the piston ring, is determined.

Next, the support member 9 is returned to its original position of 1 μ by the reciprocating drive source 5V, the reference disk 3 is removed, and instead, a σ Noviston ring is used as a test piece, for example, along the inner circumference of the combination ring complete jig 2. , again drives the reciprocating drive source 5 to move the support member 9 +1σ1 to the left in FIG. The support member 9 transmits the force received by the support member 9 from the reciprocating drive source 5 to the support member 10 via the jig 2, and the opposing member 10 receives the force from the support member 9 and transmits the force. The force continues to be transmitted to the tension detector 6 which is elastically energized, and the tension detection unit H6 continues to detect the force accordingly.

The ejection value is sent to the display meter 8 by eliminating the jijφ force component of the jig 2 as No. 14 17, and the ever-changing value sent by No. 1d 17 continues to be displayed on the display total 8 & (.

The circumferential length of jig 2 and piston ring gradually becomes shorter,
When the dog 15 comes into contact with the touch switch 18 of the micrometer head 7, the touch switch 18 sends a stop (n number I5) and a hold signal 19 to the reciprocating drive Ill!5 and the display meter 8, respectively.Reciprocating drive source 5 Stop 1: The drive is stopped in response to the signal 15, and the movement of the support member 9 to the left in FIG. 1 is stopped. Retains the displayed value.

This displayed value is the tension of the piston ring based on the predetermined circumference in a perfect circle state. Figures 7 and 8 show the tape jig X20. The jig 2 is used in a similar manner (14). In the case of this tape jig side, a piston ring and reference disk 3 having a diameter within the specified range can be fitted into the tape (ej jig 20).

As is clear from the above description, in the piston ring tension measurement method according to the present invention, the tension can be measured with the circumference of the piston ring as the base. It is also possible to measure the tension when the troughs and ends of the piston rings that form the gap are ridged.

The tension measuring device W for piston rings is automated and can measure the entire tension based on the circumference of the piston ring. You can also measure the tension when 4L is equal to 0.

[Brief explanation of drawings]

Fig. 1 is a simplified plan view showing one embodiment of the present invention. Fig. 2 is a simplified front view showing one embodiment of the present invention. Fig. 3 shows a jig related to the main throat. The front view and Isamu 4 are
Fig. 3 is a side view, Fig. 5 is a front view showing the reference disk for tree climbing eA k (relevant reference disk), Fig. 6 is a side view of Fig. 5, and dX7 is a tape jig according to the present invention. Fig. 8 is a side view of Fig. 7. 1... Main body of tension measuring device 2... Jig 3... Random quasi-disc 4... Pair of chucks 5... Reciprocating drive source 6...Tension detector 7...Micrometer head 13.14...Chuck 18...Touch switch

Claims (1)

[Claims] tll Connect the receiver 1-E hand 1da to one end of the ring-shaped jig that extends through the gap, and attach the pressing means to the sacrum end. Therefore, the pressing force from the pushing IF means is applied to the pressure receiving means through the ring-shaped tool L2.11'l r+1.t') in the ring-shaped jig. Aim the diameter expansion/contraction state of the ring-shaped jig at this time by placing the reference disk at a density of 1.Next, place the piston ring to be measured in place of the reference disk described in 141J on the ring-shaped jig. , When the ring-shaped jig reaches the measured state, press UF of the suppressing means: By setting the sword rJ!I, the tension of the piston ring is set to i11!l. A piston ring tension measurement method characterized by: (2) a ring-shaped jig having a gap of 1 [-1, within which a piston ring can be fitted into the opening; and the ring-shaped jig; a pair of chucks that removably clamp opposing ends of the chuck; a slanted pressing means that is linked to one of the pair of nayaks and presses the chuck f of the -J toward the chuck of the Nohkata; a tension detection means that is connected to one of the pair of chucks and detects the suppression force acting on the one chuck through the ring-shaped jig and the usage chuck; and expansion/contraction of the ring-shaped jig. Diameter m k #II, i L
,) j11. A tension measuring device for a piston ring, comprising: a control means for controlling the pressing means.