KR100216405B1 - Head part deformation method and apparatus of anchor bolt - Google Patents

Abstract

The present invention relates to an anchor bolt head processing method and apparatus for forging a head portion of an anchor bolt, thereby improving productivity and quality.

Conventional technology for processing anchor bolts has a problem that the productivity and quality is reduced by cutting the material prepared in circular form using a cutting machine such as a lathe, or injection molding using a mold,

Accordingly, while the end of the material prepared for processing is fixed so as to protrude from the fixing die, the protruding end of the material is brought into a movable die provided with a molding groove of a desired shape, and the end of the material is deformed by pressing with a punch. It is characterized by the fact that it is possible to form a large end, to increase the density of the product and to reduce the production equipment to reconsider productivity and quality.

Description

Anchor bolt head processing method and device

1 is a block diagram showing a processing apparatus and a processing process of the embodiment of the present invention,

(a) is a process readiness diagram,

(b) is a machining progress diagram,

(c) is a machining completion state diagram.

2 is a perspective view showing an example of a general anchor bolt.

* Explanation of symbols for main parts of the drawings

10: fixed die 20: movable die

21: slope 22: guide groove

30 clamp 31 hollow part

32: forming groove 33: incision groove

34: Jamming 40: Punch

41: ring portion 42: elastic spring

The present invention is a method for processing the head portion of the anchor bolt and the device, more specifically, the head of the anchor bolt that can be forged to deform the head portion of the anchor bolt to the desired shape by the force to improve the manufacturability and quality It relates to a secondary processing method and an apparatus thereof.

In general, conventional anchor bolts have been used as a means to provide a basis for attaching relatively heavy articles to concrete structures or masonry, which anchor bolts are embedded in the structure, as shown in FIG. It consists of a head (1) to be fixed and a spiral (2) protruding out of the structure to fasten the article with a screw or the like.

The large end portion 1a of the head portion 1 is enlarged relative to the outer diameter of the small end portion 1b connected to the spiral portion 2 and to which the ring-shaped fixing means (not shown) are coupled. The conventional technique for manufacturing the large end portion 1a of 1) has generally been a method of cutting a material prepared in a round bar shape using a cutting machine such as a lathe, or using a mold.

However, in the case of the former cutting process, a high degree of skill is required, and production facilities and processing processes are cumbersome, resulting in a decrease in productivity. In the case of the latter injection molding, the hardness of the product decreases and the quality is degraded. There was also.

The present invention has been made in view of the problems caused by the manufacture of the conventional anchor bolt, the object is to provide a method and apparatus for processing the head portion of the anchor bolt that can improve the productivity and quality of the product.

The object of the present invention is to push the protruding end of the raw material into the movable die provided with the forming groove of the desired shape while fixing one end of the raw material prepared for processing to protrude from the fixing die, and then forcibly press the raw material with a punch. By modifying the end of the end to form a large end, it is possible to increase the density of the product and reduce the production equipment to improve the productivity and quality.

Hereinafter, the head processing method of the anchor bolt and the apparatus of the present invention will be described with reference to the accompanying drawings.

1 shows a processing apparatus of an embodiment of the present invention, in which a fixed die 10 for supporting a raw material 100 prepared in a round bar type is installed, and a material 100 protruding from the fixed die on one side corresponding to the fixed die. A movable die 20 is installed in which an end portion of the s) enters a predetermined depth and dies forging.

In the movable die 20, the hollow part 31 which accommodates the entered raw material 100 and the clamp 30 in which the shaping | molding groove 32 was integrally formed in order to perform the forging of a desired shape are slidable. It is inscribed so that, one side of the clamp is provided with a punch 40 for sliding down the end surface of the material 100 entered into the hollow portion while sliding on the hollow portion 31.

The inlet portion S of the hollow portion 31 formed in the clamp 30 is at least two or more cutouts so that the inner diameter can be enlarged and reduced by the inclined surface 21 of the movable die 20 detachable from the outer peripheral surface thereof ( 33) is formed.

In addition, an outer circumferential surface of the clamp 30 is provided with a locking projection 34 to limit an arbitrary release prevention and sliding range when sliding on the inner circumferential surface of the movable die 20 and the inner peripheral surface of the movable die 20 corresponding to the locking projection. Although the guide grooves 22 are formed in each of the guide grooves, the guide grooves are formed on the outer circumferential surface of the clamp 30, while the locking protrusion 34 may be formed on the inner circumferential surface of the movable die 20.

Outside the punch 40, which is integrally attached to the hollow portion of the movable die 20 and the clamp 30 and slides, an annular protrusion 41 for setting a stroke during the stepping operation is formed. The outer circumferential surface of the funty 40 positioned between the die 20 and the clamp 30 is interposed with an elastic spring 42 for buffering and restoring action.

On the other hand, it is preferable to operate the movable die 20 in which the clamp 30 is inscribed integrally by the punch 40, and it is also possible to operate the movable die 20 and the punch 40, respectively.

The material of the material 100 for die forging is preferably a malleable metal material that can be deformed by a force.

In the process for processing the anchor bolt of the present invention having the configuration as described above, the fixed die 10 is fixed to the round rod-shaped material 100 to a predetermined length of the manle and then movable die 20 toward this material ), The clamp 30 and the punch 40 are integrally sliding (see FIGS. 1A and 1B).

By the above action, the protruding portion of the material 100 is inserted into the hollow portion 31 of the clamp 30, wherein the inlet portion S of the clamp 30 is the inclined surface 21 formed on the movable die 20. Since it is not subject to any restraint from the inner diameter of the inlet portion becomes the size of the outer diameter of the material 100 is easy to insert.

When the punch 40 and the movable die 20 are further slid toward the clamp 30 where one end is already in contact with the fixed die 10 by the continuous operation, the inclined surface 21 of the movable die is clamped ( The inlet portion S of 30 is constrained to closely contact the outer circumferential surface of the raw material 100 while shrinking the plurality of incision grooves 33 to the starting point.

At the same time, the front end portion of the punch 40 sliding on the hollow portion 31 of the clamp 30 strikes at a high pressure while instantaneously collides with the end portion of the material which is located in the same hollow portion 31. As for the end of the material 100 is deformed as in the forging process is completed in a shape corresponding to the forming groove (32). At this time, the rounded portion 41 formed on the outer side of the punch 40 is in contact with the outer surface of the movable die 20 to block the sliding of the punch 30 any longer, which may occur when excessively colliding with the material 100. To prevent the possibility of defects and cracks.

In addition, the elastic spring 42 installed therein during the step-down operation of the punch 40 serves to mitigate the impact of the movable die 20 and the clamp 30 to protect the parts, as shown in FIG. When the movable die 20 is separated from the fixed die 10, it serves as a return action of pushing the clamp 30 inwardly outward.

Therefore, when the punch 40 is slid to be separated from the material 100 after the forging process is completed, the inclined surface 21 of the movable member 20 does not restrain the inlet portion of the clamp 30. The inner diameter can be freely expanded so that the large end of the expanded material 100 is easily separated from the hollow part 31 of the clamp 30 after the forging process.

By the above operation, the movable die 20 returns to the initial operation and is ready for continuous operation.

Therefore, the present invention as described above, as the movable die 20 adjusts the dimensions of the hollow portion 31 and the molding groove 32 of the internal clamp (30), it is possible to manufacture anchor bolts of various standards, so the production equipment There is an economical efficiency to reduce the equipment cost by simplifying.

In addition, by forging by the instantaneous blow of the punch 40, the processing method is simple and mass production is possible.

Such the present invention is economical effect that can be mass-produced with a simple facility to improve the productivity of the product, there is also the ability to improve the quality of the product.

Claims (4)

The end portion of the round rod-shaped material 100 is fixed to the fixed die 10 so as to protrude by an appropriate length, and the hollow portion 31 and the molding are formed to enable forging of the protruding portion of the material 100. The movable die is prepared by a preliminary step of moving the movable die 20 in which the clamp is inscribed so as to enter the clamp 30 having the groove 32 formed therein, and a sliding operation of the punch 40 for moving the movable die 20. The inclined surface 21 of the 20 restrains the inlet portion S of the clamp 30 and firmly fixes the material 100 while reducing the inner diameter of the inlet portion from the incision groove 33 formed therein. And, by the continuous sliding operation of the punch 40 by pressing the end portion of the material 100, the front end portion thereof was located in the same hollow portion 31 to be deformed into the shape of the forming groove 32 to complete the forging process The head portion processing method of the anchor bolt, characterized in that the step. A movable die 20 which is installed to be movable in correspondence with the fixed die 10 to which the raw material 100 is fixed, and performs forging of a desired shape at the end of the raw material 100, and the movable die 20. ) Is provided with a hollow portion 31 which is slidably inscribed to allow the material to enter an appropriate length and a molding groove 32 for forming a forging of a desired shape, and formed at the inlet portion S. Clamp 30, the inner diameter of which is expanded and contracted depending on whether or not the inclined surface 21 of the movable die 20 is detached from the incision groove 33, simultaneously passes through the movable die 20 and the clamp 30, It is slidably installed in the hollow portion 31, the head portion processing apparatus of the anchor bolt characterized in that it comprises a punch 40 for pressing down the end surface of the material 100 entered from the opposite side of the hollow portion (31). The method of claim 2, wherein the engaging projection 34 is formed on the outer peripheral surface of the clamp 30 and the guide groove 22 is formed on the inner peripheral surface of the movable die 20 corresponding to the head portion processing of the anchor bolt Device. 3. The anchor as claimed in claim 2, wherein an elastic spring (42) is provided on the outer circumferential surface of the punch (40) located between the movable die (20) and the clamp (30), which simultaneously serves as a cushioning action and a restoring action. Bolt head processing equipment.