TW201302389A - Method for manufacturing angled socket wrench - Google Patents

Abstract

A method for manufacturing an angled socket wrench comprises the following steps: (a) selecting sockets, in which a plurality of sockets of the same specification are selected, each socket having a head portion and a body portion; (b) connecting a handle, in which a handle is selected and the body portion of each socket is respectively welded to the two ends of the handle through friction welding, each socket having a socket axis, the handle having a handle axis, the socket axis being spaced from the handle axis by a predetermined distance; and (c) shaping a wrench, in which the body portion of one of the sockets is selected and cut off to form a guide channel, the guide channel being in communication with the head portion of the socket, and then bending the body portion to complete the manufacturing of the angled socket wrench.

Description

Pipe wrench manufacturing method

The invention relates to the processing or processing of metal sheets, tubes, rods or profiles, in particular to a method for making a pipe wrench.

According to the conventional pipe wrench (or tubing wrench), the sleeve end is manufactured by integral molding and according to DIN standard or ISO standard, and the processing method can be roughly divided into cold forging and hot forging. In general, cold forging is limited by the processing of molds and machines, and is used in the manufacture of small-sized pipe wrenches. The advantage is that the inner diameter of the finished sleeve is accurate. However, the use of cold section processing to make a one-piece pipe wrench has too much excess material, resulting in increased production costs, and the corresponding mold problem must be set according to customer requirements for different pipe wrench specifications. In addition, because a set of molds corresponds to a pipe wrench of a certain size, it is easy to generate excessive inventory.

The use of hot forging to make a one-piece pipe wrench is already a mature technology. It has the advantage that it can be used to make pipe wrenches of all specifications, but it has the disadvantage of insufficient inner diameter of the sleeve. In addition, because the pipe wrench is integrally formed, the corresponding mold must be set for different specifications.

In view of the above-mentioned conventional method for manufacturing a pipe wrench, a pipe wrench is manufactured in an integrally formed manner, and a mold is required for each type of pipe wrench, resulting in an increase in the cost of the mold and a backlog of inventory costs.

In view of the deficiencies of the prior art, the main object of the present invention is to provide a method for manufacturing a pipe wrench, which can reduce the development cost of the mold and reduce the inventory of the finished product compared with the conventional method of manufacturing the wrench.

In order to achieve the foregoing object, a pipe wrench manufacturing method according to the present invention comprises the following steps: a) selecting a sleeve: selecting a plurality of sleeves of the same size, each sleeve having a head and a body ; b) connecting the grip bar: selecting a grip bar, and then respectively welding the body parts of the sleeve to the two ends of the grip bar by friction welding; each of the sleeves has a sleeve axis, and the grip The rod has a grip axis, the sleeve axis is at a predetermined distance from the shaft of the grip; and c) a wrench is formed: one of the sleeves is selected and cut into a guide groove The guiding groove communicates with the head of the sleeve, and then the body is bent to complete the pipe wrench.

It can be seen from the above that the method for manufacturing the pipe wrench provided by the present invention is not formed in an integrally formed manner, but is formed by fixing the required components to each other, so that the change and improvement of the related components can be separately performed according to the needs of the customer. Compared with the conventional wrench manufacturing method, the development cost of the mold can be reduced and the stock of the blank can be reduced.

In order to explain the technical features of the present invention in detail, the following preferred embodiments are described below with reference to the accompanying drawings, wherein, as shown in the first to fourth embodiments, the first preferred embodiment of the present invention provides A pipe wrench manufacturing method mainly comprises the following steps: a) selecting a sleeve, b) connecting a grip rod and c) a wrench forming.

a) Selecting the sleeve: As shown in the second figure, a plurality of sleeves 111 of the same size are selected. The preferred embodiment is exemplified by the number two, each sleeve having a head portion 112 and a body portion 113. Since the sleeve has international standards, such as DIN standard or ISO standard, the size is selected, so it is only necessary to select the size of each sleeve 111 to be used, and the outer shape of the sleeve 111 is smaller than the wrench semi-finished product. Rules are easier to transport, store and machine. In addition, since each of the sleeves 111 is easily obtained by outsourcing, it is easier and cheaper to manage the inventory than the wrench blank.

b) Connecting the grip bar: As shown in FIG. 3A, a grip bar 12 is selected, and then the body portions 113 of the sleeves 111 are respectively welded to the ends of the grip bar 12 by friction welding. As shown in the third figure B, each of the sleeves 111 has a sleeve axis 111a, and the grip 12 has a grip axis 12a, and the sleeve axis 111a is spaced from the grip axis 12a. The predetermined distance d. It is worth mentioning that the predetermined distance d ranges from 0 to 0.2 calendars, whereby the user can use the pipe wrench produced by the present invention efficiently without wasting the force. In this step, the grip 12 is directly made for the required length, thickness and appearance, and the grip 12 has a shape that is easier to transport, store and machine than the wrench blank. Since the grip 12 is easily obtained from a standard bar and processed, it is easier and less costly to manage the inventory than the wrench blank.

In addition, as shown in the fourth figure, it should be particularly noted that in step b), the grip 12 and the sleeve 111 are connected by friction welding, and after the welding, the grip 12 and each of the grips 12 A welded portion 116 is formed between the sleeves 111, and each of the welded portions 116 has a protruding portion 117 which protrudes from the welded portion of the sleeve 111 and the gripping rod 12; the gripping rod 12 and the sleeve 111 are After the friction welding is welded, and the fusion joint 116 has not been returned to room temperature, the projection 117 is processed and removed.

The reason why the protruding portion 117 is removed by the above processing method is that the welded portion 116 which has not been cooled is softer than the welded portion 116 which has been cooled and hardened, so that the cost of directly trimming the protruding portion 117 is low. If the protrusions 117 are reworked and removed after the sleeves 111 and the grips 12 are cooled to room temperature, the welds 116 are cooled and hardened, so that the protrusions 117 are not easily processed and removed. Moreover, the processing cost is high because of its hard texture.

c) Wrench forming: As shown in FIG. 5A and FIG. BB, one of the sleeves 113 of the sleeve 111 is selected and cut into a guiding groove 114, and the guiding groove 114 communicates with the sleeve. The head 112 of the canister 111, as shown in FIG. 5C, is then bent over the body 113 to complete the manufacture of the pipe wrench.

As can be seen from the above, the method for manufacturing a pipe wrench provided by the present invention is more integrally formed than the conventional one. For example, if the client wants to change the length specifications of the wrench segments, the technique provided by the present invention can be designed to match the requirements of the client on the selection sleeve or the selection grip, without modifying the mold as in the prior art. What is more, if the client only needs to correct the length of the grip, the method for manufacturing the pipe wrench provided by the present invention can only change the length of the grip, and immediately provide the pipe wrench of the customer, compared with the conventional wrench making method. Obviously, it can quickly respond to the client's variable wrench size, meet the needs of the client, and also increase the flexibility of the pipe wrench.

111. . . Sleeve

111a. . . Sleeve shaft

112. . . head

113. . . Body

114. . . Guide slot

116. . . Fusion joint

117. . . Protrusion

12. . . Grip

12a. . . Grip axis

d. . . Predetermined distance

The first figure is a flow chart of the steps of a preferred embodiment of the present invention;

The second drawing is a schematic view of a preferred embodiment of the present invention showing the sleeve used for selecting the wrench;

Figure 3 is a schematic view of a preferred embodiment of the present invention showing a selection grip;

FIG. 3B is a schematic view of a preferred embodiment of the present invention, the display sleeves respectively have a sleeve axis, and the grip rod has a grip shaft center, and the sleeve axis is spaced apart from the shaft center by a predetermined distance;

The fourth drawing is a schematic view of a preferred embodiment of the present invention, showing that the processing removes the protrusion;

Figure 5 is a schematic view of a preferred embodiment of the present invention, showing that one of the sleeves is selected to form a guiding groove;

Figure 5B is a schematic view of a preferred embodiment of the present invention, showing that one of the sleeves is selected to be cut away to form a guiding groove;

Figure 5C is a schematic view of a preferred embodiment of the present invention showing the bent body and completing the pipe wrench.

Claims (3)

A method for manufacturing a pipe wrench includes the following steps: a) selecting a sleeve: selecting a plurality of sleeves of the same size, each sleeve having a head and a body; b) connecting the grip: selecting a grip, and then The sleeves of the sleeves are respectively welded to the ends of the grip rods by friction welding; each of the sleeves has a sleeve axial center, and the grip rod has a grip shaft center, and the sleeve shaft center and the sleeve The grip shaft is spaced apart by a predetermined distance; and c) the wrench is formed: one of the sleeves is selected and cut into a guiding groove, the guiding groove is connected to the head of the sleeve, and then Bend the body to complete the pipe wrench. The method for manufacturing a pipe wrench according to claim 1, wherein the predetermined distance ranges from 0 to 0.2 mm. The method for manufacturing a pipe wrench according to claim 1 or 2, wherein in the step b), the grip and the sleeve are connected by friction welding, and after the welding, the grip and the respective Forming a welded joint between the sleeves, each of the welded joints has a protruding portion that protrudes from the sleeve and the welding range of the gripping rod; after the gripping rod and the sleeve are welded by friction welding, And the weld is removed to the room temperature, and the protrusion is processed and removed.