JPH0594703U - Bottom plate thickness inspection device for cylindrical work with bottom - Google Patents

Abstract

(57) [Summary] [Purpose] Defective products are completely prevented from flowing out by inspecting the bottom plate of each work by a simple means simultaneously with the height inspection of the disc body. [Structure] When an elevating means 8 is lowered to inspect a height of a disc body (guide plate) 2 inserted into a work 1 before welding, a supporting member integrally fixed to one side of the elevating body 7 is supported. The plates 18 simultaneously descend, and the elevating rod 10 slidably fitted on the support plate 18 vertically descends until it comes into contact with the upper surface of the bottom plate 1b of the work 1, and the displacement amount is detected by the measuring means 16. As a result, the height of the disc body 2 and the thickness of the bottom plate 1b of the work 1 are inspected. Therefore, the device of the present invention can be applied to, for example, resistance welding device
If provided in the work conveying step for supplying the work 1 to the above, the check leakage of the thickness of the bottom plate 1b of each work 1 does not occur, and the defective product is completely prevented from flowing out.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inspection device capable of inspecting the thickness of a bottom plate of a cylindrical work having a bottom, such as a body of a valve lash adjuster for an internal combustion engine, in a process of welding a disc body into the work.

[0002]

[Prior Art]

 As shown in Fig. 2, the body (1) of the valve lash adjuster, which is installed in the valve mechanism of the internal combustion engine and automatically keeps the valve clearance to zero, has a bottomed cylindrical shape and its inner peripheral surface is A disc-shaped guide plate (disc body) (2) for guiding a plunger (not shown) is joined to the annular step (1a) formed in the middle portion.

The joining of the guide plate (2) is usually performed by using a resistance welding device (5). That is, as shown schematically in FIG. 2, first, the guide plate (2) is inserted into the body (1) that has been sent out after finishing each part to the specified dimensions in the previous process with an insertion device (not shown). Then, it is placed on the step (1a).

Next, the body (1) is inserted into the positioning hole (4a) of the work transfer device (4) which intermittently moves to the right on the base (3), and before the welding of the guide plate (2). Check the height of the product. Transport it to just below the height inspection device (6). The height inspection device (6) is configured as follows.

That is, on the upper horizontal piece (7a) of the forward-looking U-shaped lifting bracket (7), the piston of the air cylinder (8) fixed in a vertical direction to an immovable support body (not shown). The rod (8a) is connected. A guide tube (9) is press-fitted into the horizontal piece (7b) below the elevating bracket (7) so as to face up and down, and the guide tube (9) is inserted into the lower end of the body (1). An elevating rod (10) having a large-diameter inspection part (10a) capable of contacting the upper surface of the guide plate (2) fitted therein is slidably fitted.

At the upper end of the lifting rod (10), the central portion of the horizontal lifting plate (11) is bolted, and the lifting rod (10) is provided at the left end of the lifting plate (11). The hole (12) is loosely fitted with a detent rod (13) which is erected on the upper surface of the horizontal piece (7b) to prevent rotation about the axis.

The elevating rod (10) is constantly urged downward by a compression coil spring (14) that is contracted between the upper end of the inspection unit (10a) and the guide tube (9), and the elevating plate (11). The lower surface of the guide is in contact with the upper end of the guide tube (9) so that it is held at the lower limit position.

On the horizontal portion (15a) of the inverted L-shaped bracket (15) bolted to the right end portion of the horizontal piece (7b), the dial gauge (16) has its probe head (16a) facing downward. The height of the probe (16a) is adjusted so that the probe (16a) is in contact with the upper surface of the lift plate (11).

When the body (1) is conveyed to a position right below the inspection device (6) having the above-mentioned structure, the piston rod (8a) of the air cylinder (8) automatically protrudes by a predetermined stroke to move up and down the bracket (7). Is lowered, and the inspection portion (10a) of the lifting rod (10) is brought into pressure contact with the upper surface of the guide plate (2) in the body (1).

By comparing the deflection of the pointer (16b) of the dial gauge (16) at this time with a preset value, the height of the guide plate (2) before welding and the guide Check if there is any leakage of the plate (2) and if it is fitted in the proper position.

When the guide plate (2) is in the normal position, the body (1) is conveyed to directly below the next resistance welding device (5), and the outer peripheral surface of the body (1) is a lower electrode having a half-cylindrical shape. (17) Grasp by (17).

Then, the resistance welding device (5) is lowered so that the upper electrode (5a) at the lower end of the resistance welding device (5) is pressed against the upper surface of the guide plate (2), and between the upper electrode (5a) and the lower electrode (17). When the electric current is applied to the peripheral portion of the guide plate (2), the stepped portion (1a) of the body (1) is joined.

[0013]

[Problems to be solved by the device]

 As described above, in the work of welding the guide plate (2) into the body (1), it is necessary to check whether the guide plate (2) is fitted in the proper position immediately before the welding device (5). By checking the height inspection device (6) provided, the positional accuracy during welding is improved.

In many of the bodies (1), the bottom plate (1b) having a thickness larger than the specified thickness may be mixed due to wear or breakage of the cutting tool in the previous step. Since the body (1) having such a thick wall has a shallow quenching depth on the surface of the bottom plate (1b), there is a problem in wear resistance and durability is deteriorated.

Therefore, it is desirable to eliminate such defective products before joining the guide plates (2), but conventionally, there is a means for easily checking the thickness of the bottom plate (1b) of each work. Therefore, it was done artificially by a sampling inspection after cutting.

[0016] In such a sampling inspection, not only there is a possibility that a check-failed product may flow out, but also the inspection work is inefficient because it is a manual work.

The present invention has been made to solve the above-mentioned problems, and the inspection of the bottom plate of each work is performed by a simple means at the same time as the height inspection of the guide plate, so that defective products can be prevented from flowing out. It is an object of the present invention to provide a bottom plate thickness inspection device for a cylindrical work with a bottom, which can be completely prevented.

[0018]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is to fix a disc body having a through hole at the center at a proper position on the inner peripheral surface of a work having a bottomed cylindrical shape by an appropriate welding device. The height before welding from the lower end surface of the work in the above is raised and lowered by the elevating means. The lower end of the inspection rod provided on the elevating body is brought into contact with the upper surface of the disc body, and the displacement amount at that time is measured appropriately A horizontal support plate is integrally fixed to one side of the elevating body in the height inspecting device, and the upper surface of the work bottom plate is passed through the through hole of the disc body. It is characterized in that an elevating rod that can come into contact with the elevating rod is slidably fitted in the vertical direction and a measuring means for detecting the displacement amount of the elevating rod is provided.

[0019]

[Action]

 When the lifting means is lowered to inspect the height of the disc body inserted into the work before welding, the support plate integrally fixed to one side of the lift body simultaneously descends, An elevating rod slidably fitted to the upper and lower sides descends until it comes into contact with the upper surface of the bottom plate of the workpiece, and the amount of displacement is detected by the measuring means. Thickness is inspected. Therefore, if the device of the present invention is provided in a work transfer process for supplying a work to, for example, a resistance welding device, a check leak of the thickness of the bottom plate of each work does not occur, and a defective product will flow out. Is completely prevented.

[0020]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The same members as those in the conventional example described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, a horizontal support plate (18) is provided on the left side surface of the lifting bracket (7) in the conventional height inspection device (6) for a guide plate, such as a lower horizontal piece (7b). It is fixed by means such as welding so as to form a high height. (18a) is a reinforcing plate.

The support plate (18) includes a guide tube (9), an elevating rod (10), an elevating plate (11), a detent rod (13), a compression coil spring (14), a bracket (as in the conventional case). A bottom plate thickness inspection device (19) including a dial gauge (16) and a dial gauge (16) is installed symmetrically.

The lower end of the expanded spring bearing (10c) of the lifting rod (10) has a downward cylindrical portion (2a) at the center of the guide plate (2) inserted into the middle portion of the body (1). It is an inspection rod (10d) with a diameter that allows it to be loosely inserted inside.

The body (1) having the guide plate (2) previously inserted therein and intermittently conveyed by the work conveying device (4) has a height inspection device (6) and a bottom plate thickness inspection device (19), respectively. ), The air cylinder (8) is actuated to simultaneously lower the lifting bracket (7) and the support plate (18) fixed thereto.

As a result, the elevating rods (10), (10) of the respective inspection devices (6), (19) simultaneously descend, and the height inspection device (6) causes the preceding body to move in the same manner as in the prior art described above. The height of the guide plate (2) in (1) is inspected, and the inspection rod (10d) of the bottom plate thickness inspection device (19) is inserted through the guide plate (2) and the following body (1 The thickness of the bottom plate (1b) is inspected by contacting the upper surface of the bottom plate (1b) of (1) and checking the amount of deflection of the pointer (16b) of the dial gauge (16) at that time.

These two inspection devices (6) and (19) inspect each individual work piece, and then only non-defective products are conveyed to the resistance welding device (5), and the guide plate (2) is inserted into the body. It is joined in (1). Therefore, it is possible not only to prevent an error in the accuracy of the joining position of the guide plate (2) but also to completely prevent an abnormal product of the thickness of the bottom plate (1b) from flowing out. ..

Although an analog dial gauge is used as the measuring means in the above embodiment, for example, a linear gauge (linear encoder) that electrically converts a linear displacement amount may be used. The movement of the work transfer device (4) and the operation of the resistance welding device (5) can be automatically stopped based on the electric signal when an abnormal product is detected.

Of course, the bottom plate thickness inspection device (19) may be provided on the right side of the height inspection device (6), that is, on the resistance welding device (5) side.

[0029]

[Effect of the device]

 According to the present invention, the following effects can be obtained. (a) Since the thickness of the bottom plate of each work can be automatically measured at the same time as the height inspection of the disc (guide plate), the inspection efficiency is high and the device of the present invention can If it is installed in the work transfer process before the resistance welding device for joining the bodies, not only the defective products can be eliminated before the disc bodies are joined, but also the outflow of defective products can be completely prevented.

(B) Since the inspection work of the bottom plate can be performed by one elevating means (air cylinder) for the height inspecting device, it is not necessary to provide a plurality of elevating means, and the configuration of the entire device is simplified. To do.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an example in which an embodiment of the present invention is applied to a work transfer process before a resistance welding device.

FIG. 2 is a partially cutaway side view showing a conventional height inspection device provided in front of a resistance welding device.

[Explanation of symbols]

(1) Body (work) (1a) Step (1b) Bottom plate (2) Guide plate (disk) (2a) Downward cylindrical part (through hole) (3) Base (4) Work transfer device (4a) Positioning hole (5) Resistance welding device (5a) Upper electrode (6) Height inspection device (7) Elevating bracket (elevating body) (7a) (7b) Horizontal piece (8) Air cylinder (elevating means) (8a) Piston Rod (9) Guide tube (10) Lifting rod (10a)
Inspection department (10c) Spring bearing (10d)
Inspection rod (11) Lift plate (12) Through hole (13) Non-rotating rod (14) Compression coil spring (15) Bracket (15a)
Horizontal part (16) Dial gauge (measuring means) (16a)
Stylus (16b) Pointer (17) Lower electrode (18) Support plate (18a)
Reinforcement plate (19) Bottom plate thickness inspection device

Claims (1)

[Scope of utility model registration request] 1. When a disc body having a through hole in the center is fixed to an appropriate position on the inner peripheral surface of a work having a bottomed cylindrical shape by an appropriate welding device, before welding from the work lower end face of the disc body. The height of the inspection rod provided on the elevating body that is moved up and down by the elevating means is brought into contact with the upper surface of the disc body, and the displacement amount at that time is measured by an appropriate measuring means. A horizontal support plate is integrally fixed to one side of the elevating body of the inspection device, and an elevating rod which can come into contact with the upper surface of the bottom plate of the work through the through hole of the disc body is vertically moved to the supporting plate. A bottom plate thickness inspecting device for a bottomed cylindrical workpiece, which is slidably fitted to and is provided with a measuring means for detecting a displacement amount of the elevating rod.