JP2002254177A - Press-contact machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press-contact machine capable of being widely used commonly with one machine even for a material with different diameter, thereby enabling reduction in costs. SOLUTION: In the press-contact machine 1 provided with a fixing clamp 2 holding one material 11 to be brought into press-contact, a movable clamp 3 sliding to the clamp side holding other material 12, a punching shearing blade 41 sliding between the fixing clamp 2 and the movable clamp 3 for shearing a bulge 13 at the press-contact part between the materials, a punching shearing blade holder 4 mounted with the punching shearing blade 41, and a cylinder 5 to which the fixing clamp 2, the movable clamp 3 and the punching shearing blade holder 4 are assembled, the punching shearing blade 41 and the punching shearing blade holder 4 are provided exchangeably in response to the outer diameter of the material to be brought into press-contact so as to solve the problem.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure welding machine for joining materials made of reinforcing steel or the like by abutting and pressing, and more particularly, to a pressure welding machine provided with a punching blade for pushing out a bulge of a joint portion and shearing it. Belongs to the technical field.

[0002]

2. Description of the Related Art A pressure welding machine is widely used as a machine for joining steel materials (hereinafter, referred to as materials) such as rebars on site. In the joining by a gas pressure welding machine using gas, a material to be joined is held by a fixed clamp and a movable clamp respectively, the movable clamp is moved to the fixed clamp side, pressurized, and the butted portion is heated with a burner. Thus, pressure welding is performed. In order to confirm the reliability of the pressed portion on site, an inspection using a punching blade has been conventionally performed. Inspection with this punching blade refers to checking the presence or absence of cracks or the like by pressing and shearing the bulge around the press-contact portion caused by press-contact as described in JP-B-63-38099. Is a method for inspecting quality. In order to improve the punchability of the inspection with this punching blade and the reliability of the inspection, shearing under red heat immediately after gas pressure welding or shearing with a diameter slightly larger than the outer diameter of the material is required. It becomes important.

[0003] In order to improve the workability of the inspection using the punching blade, the present applicant has proposed a pressure welding machine equipped with a punching blade in Japanese Patent Publication No. 2-420036. This pressure welding machine is provided with a punching blade holder equipped with a punching blade between a fixed clamp and a movable clamp, and switches between pressing by a movable clamp and punching shearing by a punching blade by key operation. It is configured so that it can be quickly punched and sheared under red heat immediately after pressure welding.

[0004]

However, in the inspection method using a punching blade, it is necessary to perform shearing with a diameter slightly larger than the outer diameter of the material as described above in order to perform a more reliable inspection. You. For this reason, a punching blade that is suitable for the outer diameter of the material used must be selected each time. However, various types of outer diameters of rebars and the like as materials are set in standards such as JIS. Therefore, in a conventional press machine equipped with a punching blade, a press machine of a type corresponding to the number of outer diameters of the material to be used had to be provided. For this reason, in a company or the like who uses a pressure welding machine equipped with a punching blade, there is a problem that the equipment cost is increased, and further improvement has been desired from the viewpoint of cost reduction.

In view of such a conventional problem, an object of the present invention is to provide a crimping machine which can be used for a wide variety of materials having different outer diameters, and as a result, equipment cost can be reduced. It is assumed that.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the pressure welding machine of the present invention employs the following means.

That is, in the first aspect, a fixed clamp for holding one material to be pressed, a movable clamp for holding the other material and sliding toward the fixed clamp, and a swelling of the pressed portion between the materials is sheared. Pressing machine equipped with a pushing blade that slides between a fixed clamp and a movable clamp, a pushing blade holder to which the pushing blade is attached, and a cylinder to which the fixed clamp, the movable clamp, and the pushing blade holder are attached Wherein the punching blade and the punching blade holder are replaceably provided in accordance with the outer diameter of the material to be pressed.

In this means, not only the punching blade but also the punching blade holder for mounting the punching blade can be exchanged, so that various types of punching blades having different inner diameters can be mounted on one press-contacting machine. Becomes

According to a second aspect of the present invention, in the pressing machine according to the first aspect, the bulge of the pressing portion is pushed out by a hole surrounded by a punching blade, and the hole is formed by a fixed clamp and a movable clamp. Characterized by being formed in advance at a position corresponding to the central axis of the material held at the position.

In this means, since the hole of the punching blade is formed in advance in accordance with the position of the center axis of the material to be pressed, the outer diameter of the material held by the fixed clamp and the movable clamp changes. Also, no misalignment with the material occurs during punching.

According to a third aspect of the present invention, in the pressure welding machine according to the first or second aspect, the cylinder is formed integrally with the fixed clamp, and is provided with a slide groove that is long in the axial direction and is precision finished. The punching blade holder and the movable clamp are disengaged along the groove.

In this means, the movable clamp and the punching blade holder are engaged along the precisely finished slide groove of the cylinder, so that the assembling accuracy of the fixed clamp integrally formed with the cylinder is improved. Get higher. Accordingly, the movable clamp and the push-out blade holder only engage with each other along the slide groove, thereby completing the alignment and eliminating the need for adjustment after assembly.

According to a fourth aspect of the present invention, in the crimping machine according to the first or second aspect, the movable clamp is provided with an adjusting mechanism for aligning the center axes of the materials to be pressed.
The punching blade holder is characterized in that it is configured to interlock with the movement of the movable clamp by the adjusting mechanism.

In this means, the position of the material held by the movable clamp and the position of the material held by the fixed clamp are adjusted by adjustment by the adjustment mechanism. The positioning of the punching blade holder with the material is completed by interlocking with the movement of the movable clamp.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a basic embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view showing the appearance of the embodiment (1), FIG. 2 is an exploded view of the embodiment (1), FIG. 3 is a partial sectional view of the embodiment (1) as viewed from the side, and FIG. FIG. 4 is an explanatory diagram showing an operation of the embodiment (1).
FIG. 5 is a model diagram showing an example of a punching blade according to the embodiment (1);
FIG. 6 is a model diagram showing an example of the punching blade holder according to the embodiment (1).

In the embodiment (1), a fixed clamp 2 for holding one material 11 to be pressed, a movable clamp 3 for holding the other material 12 and sliding toward the fixed clamp 2, and a pressure contact between the materials. A punching blade 41 that slides between the fixed clamp 2 and the movable clamp 3 to shear the bulge 13 of the portion, a punching blade holder 4 to which the punching blade 41 is attached, the fixed clamp 2, the movable clamp 3, In the pressure welding machine 1 including the cylinder 5 to which the extraction blade holder 4 is assembled, the punching blade 41 and the punching blade holder 4 are provided so as to be exchangeable according to the outer diameter of the material to be pressed. I have.

In the embodiment (1), an example in which the pressure welding machine 1 is pressed by gas will be described. However, the pressure welding machine 1 may be pressed by other means.

The fixed clamp 2 has a substantially U-shaped arm 21 for receiving one material 11 and a leg 23 for supporting the arm 21. One wall 211 of arm 21
, A clamp screw 22 is screwed into the arm portion 21.
Is pressed against the other wall 212 (in the direction of arrow a) of the arm 22 by the clamp screw 22. In the embodiment (1), the arm 21 and the leg 23 of the fixed clamp 2 are formed integrally with the cylinder 5 by casting, and the arm 21 and the leg 23 are provided standing up.

The cylinder 5 is formed in a substantially cylindrical shape except for the fixed clamp 2 and has a cylindrical hole 54 with a bottom inside. The end 52 side is open. A slide groove 53 is formed in the axial direction from the other end 52. The slide groove 53 is precisely finished by machining. A slightly protruding rib may be provided along the slide groove 53 in order to improve the assembling accuracy with the movable clamp 3 and the punching blade holder 4. A connection holder 7 for attaching the hydraulic cylinder 14 is screwed to the other end 52. At this time, the hydraulic cylinder 14
Since it is fitted and attached to the groove 71, it does not come off easily.

The movable clamp 3 has a substantially U-shaped arm portion 31 for receiving the other material 12 and a leg portion 33 for supporting the arm portion 31. One wall 311 of the arm 31
, A clamp screw 32 is screwed into the arm portion 31.
Is pressed against the other wall 312 (in the direction of arrow a) of the arm 32 by the clamp screw 32. A cylindrical base 34 is provided on the side of the leg 33 opposite to the arm 31, and the base 34 has a cylindrical shape.
A narrow constricted portion 35 is provided between the leg and the leg 33. The leg 33 has a cylindrical connection hole 37 penetrating in the axial direction, and the base 34 has a cylindrical sliding hole 36 also penetrating in the axial direction. The movable clamp 3 is configured such that the constricted portion 35 is inserted into the slide groove 53 of the cylinder 5 and the base portion 34 is fitted into the hole 54 of the cylinder 5 and slidably assembled. On the hydraulic cylinder 14 side of the movable clamp 3, a lock piece 38 for use in connection with a punching blade holder 4 described later is protrudingly provided.

The punching blade holder 4 has a supporting portion 42 for mounting the punching blade 41 and a leg 4 for supporting the supporting portion 42.
3 and a base 44 having a cylindrical shape is provided on the opposite side of the support part 42 of the leg 43, and a narrow narrow part 45 is provided between the base 44 and the leg 43. . A connecting rod 47 projects from the leg 43 so as to fit into the connecting hole 37 of the movable clamp 3, and engages with a lock piece 38 of the movable clamp 3 in the middle of the end of the connecting rod 47. A lock groove 471 for detachment is formed. When the lock piece 38 is engaged with the lock groove 471, the movable clamp 3 and the punching blade holder 4 are connected.

A sliding rod 46 projects from the base 44 so as to fit into the sliding hole 36 of the movable clamp 3, and an end of the sliding rod 46 is connected to a ram (not shown) of the hydraulic cylinder 14. ) And pressurized, a moving force toward the fixed clamp 2 is applied. Movable clamp 3 and punching blade holder 4
Are connected, a moving force is also applied to the movable clamp 3 at the same time. Of course, when not connected, only the punching blade holder 3 moves. Further, the base 44 is provided with a cylindrical hole 48 which is open to the fixed clamp 2 side, so that the spring 6 can be housed. The punching blade holder 4 has the constricted portion 45 inserted into the slide groove 53 of the cylinder 5 and the base portion 4.
4 is a hole 54 of the cylinder 5 against the elasticity of the spring 6.
And is configured to be slidably assembled.

The punching blade 41 includes a pair of split punching blades 411,
412, each of which has a cutout having a substantially semilunar cross section, and combining these cutouts forms a hole 414 having a substantially circular cross section. Then, the bulge 13 of the pressed portion of the material is pushed out by the hole 414. Therefore, the inner diameter of the hole portion 414 is determined according to the outer diameter of the material to be punched, and punching blades 41 having different inner diameters, that is, punching blades 41 having different sizes are prepared. These split punching blades 411 and 412 are pivotally supported by a pair of U-shaped support portions 42 with hinge pins 412, and are arranged toward the fixed clamp 2 side. By attaching and detaching the hinge pin 412, the punching blade 41 is replaced. The same punching blade holder 4 has a plurality of punching blades 4 of different sizes.
1 is configured to be exchangeably mounted.

In the crimping machine 1 of the embodiment (1), the movable clamp 3 moves along the machined slide groove 53.
It is assembled with the fixed clamp 2 with high positional accuracy. The materials 11 and 12 to be pressed are held by the fixed clamp 2 and the movable clamp 3 so as to be pressed against the other walls 212 and 312 by the clamp screws 22 and 32, respectively. Therefore, the center axes of the materials 11 and 12 can be made coincident only by fixing them with the clamp screws 22 and 32, and when the outer diameter of the material changes, the positions of the center axes are different, and the directions of the arrows a and b are different. Go to

For this reason, the hole 414 of the punching blade 41 for punching out the material is not only formed with an inner diameter corresponding to the outer diameter of the material, but also formed in advance at a position corresponding to the shift of the central axis of the material. Have been. This will be described with reference to FIG. In FIG. 5, the punching blades 41 having different sizes are connected to the same punching blade holder 4.
2 schematically shows a state viewed from the fixed holder 2 side. The upper part of FIG. 5 shows a punching blade 41 for a material having an outer diameter W1, and the lower part of FIG. 5 shows an outer diameter W2 (<W
It is a punching blade 41 for the material of 1). In practice, there is a slight gap between the outer diameter of the material and the hole 414. As shown in FIG. 5, on the basis of the case where the outer diameter W1 is applied, when the outer diameter W2 is small, the hole 414 is used.
Are shifted by ΔL1. That is, the split punching blades 411 and 412 are formed asymmetrically depending on the size. This shift direction is the direction of arrow a. Thus, the central axis of the material can always be matched with the central axis of the hole 414. Note that ΔL1 is the material outer diameter W1
The difference in radius between W2 and W2 is determined in consideration of design considerations.

As the outer diameter of the material becomes smaller,
Since ΔL1 of the punching blade 41 is further increased, there is a limit in attaching the same to the same punching blade holder 4. Therefore, the punching blade holder 4 for mounting the punching blade 41 of a smaller size is selected and mounted on the press-contacting machine 1. This will be described with reference to FIG. FIG. 6 shows the same pressure welding machine 1
2 schematically shows examples of punching blade holders 4 of different sizes attached to the holder. The upper punching blade holder 4 in FIG.
6, the center of the constricted portion 45 previously attached to the slide groove 53 and the center of the support portion 42 are shifted from each other by ΔL2. For this reason, the lower punching blade holder 4 in FIG. 6 can easily adapt to the deviation of the center axis when the outer diameter of the material is reduced.

As described above, by forming the punching blade 41 and the punching blade holder 4 and making them replaceable, it becomes possible to use one press-contacting machine 1 for a wide range of applicable sizes of material.

In the punching blade 41 shown in FIG. 5 and the punching blade holder 4 shown in FIG. 6, the center axis is set in the direction of the arrow a as the outer diameter gradually becomes smaller based on the outer diameter of a larger material. Although an example of a configuration that shifts to the above has been described, the present invention is not limited to this configuration. Conversely, the configuration may be such that the center axis is gradually shifted in the direction of arrow b based on the outer diameter of the material, or another configuration may be used.

Next, an example of mounting the punching blade holder 4 and the punching blade 41 will be described. As the standard of the material, in the case of a reinforcing bar, it is displayed according to the diameter, such as D22, D25, and the like. In conformity with these standards, the punching blades 41 are prepared for, for example, D22, D25, D29, D32, and the like. In addition, the punching blade holder 4 is a D22
That can attach both punching blades 41 for D25 and D25
A mold and a 32 mold to which both the punching blades 41 for D29 and D32 can be attached are prepared. For example, the punching blade 41 for D32 is configured as shown in the upper part of FIG. 5, and the punching blade for D29 is configured as shown in the lower part of FIG. Also, 3
The type 2 punching blade holder 4 may be configured as shown in the upper part of FIG. 6, and the 25 type punching blade holder 4 may be configured as shown in the lower part of FIG. Then, the 25-type and 32-type punching blade holders 4 are configured to be exchangeably attached to one press-contacting machine 1. This makes it possible to use one pressing machine to cope with rebars having four types of outer diameters (D22, D25, D29, and D32). Note that this combination is an example, and various combinations are possible.

The operation of the crimping machine 1 of the embodiment (1) thus configured will be described. This operation is an example, and the order and the like may be changed.

First, the size of the punching blade 41 and the punching blade holder 4 corresponding to the punching blade 41 are selected in accordance with the outer diameters of the materials 11 and 12 to be pressed against each other. It is attached to the punching blade holder 41 with a hinge pin 413. The mounting of the punching blade 41 may be performed in a later step. The punching blade holder 4 accommodates the spring 6 in the hole 48, and the constricted portion 45 is inserted into the slide groove 53 of the cylinder 5 and assembled. Subsequently, the movable clamp 3 is assembled with the constricted portion 35 inserted into the slide groove 53. At this time, the connecting rod 47 and the sliding rod 46 of the punching blade holder 4 are fitted into the sliding hole 36 and the connecting hole 37 of the movable clamp 3, respectively.

Next, the connecting holder 7 is screwed to the other end 52 of the cylinder 5. In this state, the pushing blade holder 4 and the movable clamp 3 are urged toward the hydraulic cylinder 14 by the urging force of the spring 6.

Next, the material 11 is held by the fixed clamp 2 and the material 12 is held by the movable clamp 3.
It is held and pressed so as to press at 32. The center axes of the materials 11 and 12 are aligned only by this operation. The size of the punching blade 41 and the punching blade holder 4 is selected in advance according to the outer diameter of the material.
The outer diameters of 1, 12 are aligned with the central axis.

Next, the lock piece 38 of the movable clamp 3
By operating the lock groove 471 of the push-out blade holder 4 in the locking direction, the movable clamp 3 and the push-out blade holder 4 are connected. Then, the hydraulic cylinder 14 attached to the connection holder 7 is operated, the ram (not shown) of the hydraulic cylinder 14 is extended, and the pushing blade holder 4 is advanced against the urging force of the spring 6. The movable clamp 3 interlocks with this movement, and the held material 12 is pressed against the material 11 held by the fixed clamp 2. Then, the press contact portion is heated by a burner (not shown), and press contact is performed while forming the bulge 13.

After completion of the pressure contact, the pressurization of the hydraulic cylinder 14 is temporarily stopped, and the lock between the lock piece 38 and the lock groove 471 is immediately released to release the connection. When the hydraulic cylinder 14 is operated again in this state, only the push-out blade holder 4 advances as shown in FIG. 4, and the push-out blade 41 pushes out the bulge 13 of the press contact portion and shears. Then, when the hydraulic cylinder 14 is pulled,
The punching blade holder 4 returns to the original position by the urging force of the spring 6.

When it is desired to press-contact materials having different outer diameters, the hinge pin 413 is removed and replaced with punching blades 411 and 412 suitable for the outer diameter of the material.

When a material having a further different outer diameter is to be pressed into contact, not only the punching blades 411 and 412 but also the corresponding punching blade holder 4 is replaced. In this case, the connection holder 7, the connecting holder 7,
The movable clamp 3 and the punching blade holder 4 are sequentially removed. Then, the punching blade holder 4 of the desired size is replaced, and the punching blade 41 is attached. Then, assembling is performed again by the above-described procedure, and pressure welding is performed.

As described above, the punching blade 41 and the punching blade holder 4 can be exchanged according to the outer diameter of the material to be pressed, so that one pressing machine 1 can reduce the outer diameter of various materials. This can be applied, and it is not necessary to prepare many types of pressure welding machines 1 as equipment. Also, based on the slide groove 53,
By assembling the movable clamp 3 and the punching blade holder 4, no alignment is required.

Next, an embodiment (2) of the present invention will be described with reference to the drawings. FIG. 7 shows an embodiment (2).
8 is a cross-sectional view taken along line AA of FIG. In the embodiment (2), the embodiment (1)
The same reference numerals are given to the same descriptions as above, and the detailed description is omitted.

In the pressing machine 1 of the embodiment (2), similarly to the embodiment (1), the movable cylinder 3 and the punching blade holder 4 are exchanged for the cylinder 5 formed integrally with the fixed cylinder 2. Mounted as possible. However, in Embodiment (2), unlike Embodiment (1), an adjusting mechanism 8 for aligning the central axes of the materials pressed against the movable cylinder 3 is provided. And this adjusting mechanism 8
The punching blade holder 4 is configured to interlock with the movement of the movable clamp 3 due to the above.

The adjusting mechanism 8 includes a pair of adjusting screws 82 which are arranged to face each other with the leg 3 of the movable clamp 3 interposed therebetween.
82. Each of the adjusting screws 82 is screwed into a supporting portion 55 protruding from the cylinder 5. By adjusting the degree of pressing of these two adjusting screws 82, the movable clamp 3 is finely moved and the cylinder 5 is moved.
Relative position in the circumferential direction can be changed. As a result, the material 12 held by the movable clamp 3
And the center axis of the material 11 held by the fixed clamp 2 can be aligned.

The connecting rod 47 and the sliding rod 46 of the punching blade holder 4
Are fitted in the connecting hole 37 and the sliding hole 36 of the movable clamp 3, respectively, but this fitting does not hinder the sliding in the axial direction and has a gap as narrow as possible. I have. Therefore, when the movable clamp 3 is slightly moved in the circumferential direction by the adjusting mechanism 8, the push-out blade holder 4 also moves. Thus, the punching blade holder 4 and the punching blade 41 can also be aligned with the materials 11 and 12 to be joined.

With such a configuration, in the press welding machine 1 of the embodiment (2), the punching blade 41 and the pressing blade 41 and the pressing blade are formed in the same manner as in the embodiment (1) according to the outer diameter of the material to be joined. The extraction blade holder 4 is replaceable, so that various types of punching blades 41 can be attached to one press-contacting machine 1, and the punching blade holder is set on the basis of the fitting between the connecting rod 47 and the connecting hole 37. By assembling 4, it is possible to adjust the position of the push-out blade holder 4 only by adjusting the position of the movable clamp 3.

In the embodiment (2), the adjusting mechanism 8
In order to make the pushing blade holder 4 interlock with the movement of the movable clamp 3 due to the above, the fitting and the like of the connecting rod 47 and the connecting hole 37 are used as a reference, but this configuration is an example, You may comprise so that it may link using a site | part.

[0045]

As described above in detail, the press machine according to the present invention is provided with a plurality of outer diameters in one press machine by providing a punching blade and a punching blade holder so as to be exchangeable. Accurate punching shearing can be performed in accordance with the material, and equipment costs can be reduced.

In a press-contact type machine in which the fixed clamp and the movable clamp are assembled on the basis of the slide groove provided in the cylinder, the punching blade holder is also assembled on the basis of the slide groove so that the positioning can be performed. No longer needed.

In the press-contact type in which the movable clamp is provided with a shaft adjusting mechanism, the punching blade holder is configured to work in conjunction with the movable clamp, so that only by positioning the movable clamp, the punching blade can be moved. Holder positioning is now possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of an embodiment (1).

FIG. 2 is an exploded view of the first embodiment.

FIG. 3 is a partial cross-sectional view of Embodiment (1) as viewed from the side.

FIG. 4 is an explanatory diagram showing an operation of the embodiment (1).

FIG. 5 is a model diagram showing an example of a punching blade according to the embodiment (1).

FIG. 6 is a model diagram showing an example of a punching blade holder according to the embodiment (1).

FIG. 7 is a perspective view showing the appearance of the embodiment (2).

FIG. 8 is a sectional view taken along line AA of FIG. 7;

DESCRIPTION OF SYMBOLS 1 Pressure welding machine 11, 12 Material 13 Inflation 14 Hydraulic cylinder 2 Fixed clamp 21 Arm 22 Clamp screw 23 Leg 3 Movable clamp 31 Arm 32 Clamp screw 33 Leg 34 Base 35 Narrow portion 36 Sliding hole Part 37 connecting hole part 38 lock piece 39 guide hole part 4 push-out blade holder 41 push-out blade 411, 412 split push-out blade 413 hinge pin 42 support part 43 leg part 44 base part 45 constricted part 46 sliding rod 47 connecting rod 471 lock Groove 48 Hole 5 Cylinder 51 One end 52 Other end 53 Slide groove 54 Hole 55 Support 56 Support hole 57 Gap 6 Spring 7 Connection holder 8 Adjustment mechanism 82 Adjustment screw

Continuation of the front page (72) Inventor Hideki Yamashita 3-18-14 Takada, Toshima-ku, Tokyo F-term in Hakusan Seisakusho Co., Ltd. (Reference) 4E067 AA02 BC00 CA04 EA09 EB00 EC05

Claims (4)

[Claims] 1. A fixed clamp for holding one material to be pressed, a movable clamp for holding the other material and sliding toward the fixed clamp, and a fixed clamp for shearing a bulge of a pressed portion between the materials. In a press-contacting machine having a pushing blade that slides between movable clamps, a pushing blade holder to which the pushing blade is attached, and a cylinder to which a fixed clamp, a movable clamp, and a pushing blade holder are attached, And a punching blade holder, which is provided so as to be exchangeable according to the outer diameter of the material to be pressed. 2. The pressure welding machine according to claim 1, wherein a bulge of the pressure contact portion is pushed out by a hole surrounded by a punching blade, wherein the hole is held by a fixed clamp and a movable clamp. A crimping machine formed beforehand at a position corresponding to the central axis of the crimping machine. 3. The press-welding machine according to claim 1, wherein the cylinder is formed integrally with the fixed clamp, and has a slide groove which is long in the axial direction and which is precision finished, and is pushed along the slide groove. A pressure welding machine characterized in that an extraction blade holder and a movable clamp are disengaged. 4. The pressure welding machine according to claim 1, wherein the movable clamp is provided with an adjusting mechanism for aligning the central axes of the materials to be pressed, and the punching blade holder comprises:
A pressure welding machine characterized in that it is configured to interlock with movement of a movable clamp by an adjustment mechanism.