WO2008034294A1

WO2008034294A1 - A method for making handtool head and a rolling mill thereof

Info

Publication number: WO2008034294A1
Application number: PCT/CN2006/002439
Authority: WO
Inventors: Luhao Leng
Original assignee: Luhao Leng
Priority date: 2006-09-19
Filing date: 2006-09-19
Publication date: 2008-03-27

Abstract

A T-shaped pipe fittings includes a supporting pipe, a connecting pipe, a pre-welding connecting piece. The first end of the connecting pipe is provided with an end surface corresponding to the form of the outerwall of the supporting pipe, the connecting pipe is connected to the supporting pipe via the said end surface, and so the connecting pipe and the supporting pipe form a T shape. The pipe wall of the first end of the connecting pipe is provided with a thru hole entering into the interior of the connecting pipe. The end surface of the first end of the pre-welding connecting piece is fixed on the outerwall of the supporting pipe by welding, the second end of the pre-welding connecting piece is inserted in the interior of the first end of the connecting pipe, and is fixed on the inner wall of the connecting pipe by welding through the thru hole of the first end of the connecting pipe. Adopting the above structure, the welding lines between the pre-welding piece and the supporting pipes are covered completely by the connecting pipe. Compared with prior art, the external surface of the T-shaped pipe fittings do not need to be polished, and saving the polishing procedure.

Description

Technical field

The present invention relates to a tubular member, and more particularly to a τ-shaped tubular member.

Background technique

The τ-type pipe fittings are a kind of structural member and are widely used in various places where a τ-shaped connection is required, such as steel furniture. The pipe fittings of the prior art are usually straight pipes or bent pipes when forming and molding. In some cases, when a pipe member having a τ shape is used as the connecting member, the two pipe bodies are usually connected into a τ shape. The prior art T-shaped pipe member includes two pipe bodies which are connected to each other in a T-shape. When the two pipe bodies are fixed, the end faces of one pipe are connected to the outer wall of the pipe of the other pipe, and the two pipes are The joints are connected by welding, and when the two pipes are welded, they are usually welded on the outer wall where the two pipes are connected, and the τ-shaped pipe welded in this way is in the phase of the two pipes. A weld is inevitably formed at the joint, and the weld is generally partially convex at the outer surface where the two pipe joints are connected, so that the joint between the two pipes cannot form a flat surface, in order to achieve the flattening effect of the joint, usually It is necessary to polish the weld, for which a grinding process is necessary.

Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to overcome the deficiencies of the prior art and to provide a τ-shaped pipe member which can be connected to a τ-shaped pipe without the need for sanding of the outer surface thereof, thereby reducing the grinding process.

The technical solution adopted by the present invention to solve the technical problem thereof is: a τ-shaped pipe member, comprising a support pipe, a connecting pipe, and a pre-welded connecting member; the first end of the connecting pipe is provided with an end surface corresponding to the shape of the outer wall of the supporting pipe, The connecting tube is connected to the supporting tube in a zigzag shape through the end surface thereof, and the tube wall of the first end of the connecting tube is provided with a through hole for introducing the tube cavity; the first end surface of the pre-welding connecting piece is welded to the outer wall of the tube of the supporting tube The pre-welding connector is integrally sleeved in the wall of the first end of the connecting pipe from the second end, and is fixed to the inner wall of the connecting pipe through the through hole in the pipe wall of the first end of the connecting pipe.

The through holes in the pipe wall of the connecting pipe are one or more single-walled holes or long holes.

The through hole in the pipe wall of the connecting pipe is a long groove provided on the first end pipe wall of the connecting pipe. The pre-welded connector has at least one direction and a small gap or a tight fit on the inner surface of the connecting tube to facilitate stress and welding.

The end surface of the connecting pipe is pre-machined into a shape conforming to the shape of the supporting pipe so as to be connected Can be tightly combined.

The pre-welded connector is a flat sheet metal piece.

The pre-welded connector is a sheet metal member folded into a u shape.

The pre-welded connector is a stepped pin.

The junction between the support tube and the connecting tube is connected by electric resistance welding.

The junction of the support tube and the connecting tube is connected by flash coal welding.

In the production, the pre-welded joint is first welded to the outer wall of the support pipe, and then the pre-welded joint is integrally placed into the connecting pipe, and the pre-welded joint and the connecting pipe are welded together through the hole provided in the connecting pipe, thereby The support tube and the connecting tube complete the τ-type connection. This type of welding allows the weld between the pre-welded joint and the support tube to be completely covered by the joint, thus eliminating the need to polish the weld.

In order to make the τ-shaped pipe member have a better connection appearance, the connecting pipe and the supporting pipe may be connected by flash welding or electric resistance welding, and the pre-welding connecting piece and the connecting pipe are welded together through the hole provided in the connecting pipe; At least one or more single-walled holes, long holes or long grooves on the pipe are used to weld the pre-welded joints and the connecting pipes together to facilitate stress and welding; the end faces of the connecting pipes are pre-formed into the shape of the supporting pipes. The shape is conformed so that it can be tightly joined after joining; the pre-welded joint can be a flat sheet metal piece, a sheet metal piece folded into a u shape, or a stepped pin.

The invention has the beneficial effects that the support tube and the connecting tube are spliced into a τ shape, and the first end of the connecting tube is provided with an end surface corresponding to the shape of the outer wall of the support tube, and the connecting tube passes through the end surface thereof. The support pipe is connected, the pipe end of the first end of the connecting pipe is provided with a through hole for introducing the pipe cavity, and the first end end surface of the pre-welding connecting piece is fixed with the outer wall of the pipe of the supporting pipe, and the pre-welding joint is composed of The second end is integrally sleeved in the wall of the first end of the connecting pipe and fixed to the inner wall of the connecting pipe through the through hole in the wall of the first end of the connecting pipe. This welding method completely shields the weld between the pre-welded joint and the connecting pipe and the support pipe by the connecting pipe, eliminating the need to polish the weld seam, thereby reducing the grinding process and enhancing the competitiveness of the product. DRAWINGS

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, a τ-type pipe of the present invention is not limited to the embodiment.

Figure 1 is a perspective structural view of a τ-type pipe member of the present invention;

Figure 2 is a front elevational view showing the T-shaped pipe member of the present invention;

Figure 3 is a plan view showing the T-shaped pipe member of the present invention; Figure 4 is a side view of the T-shaped pipe member of the present invention;

Figure 5 is a cross-sectional view taken along line A - A of Figure 4;

Figure 6 is a perspective structural view of the T-shaped pipe member of the second embodiment of the present invention;

Figure 7 is a front view of the second embodiment of the present invention;

Figure 8 is a plan view of the second embodiment of the T-shaped tubular member of the present invention;

Figure 9 is a side view of the second embodiment of the T-shaped tubular member of the present invention;

Figure 10 is a cross-sectional view taken along line B - B of Figure 7;

Figure 11 is a cross-sectional view taken along line C-C of Figure 9;

Figure 12 is a perspective structural view of a third embodiment of the present invention;

Figure 13 is a front elevational view showing the T-shaped pipe member of the third embodiment of the present invention;

Figure 14 is a cross-sectional view taken along line D~-D of Figure 13;

Figure 15 is a perspective structural view of a fourth embodiment of the present invention;

Figure 16 is a front elevational view showing the T-shaped pipe member of the fourth embodiment of the present invention;

Figure 17 is a cross-sectional view taken along line E-E of Figure 16;

Figure 18 is a perspective structural view of a T-shaped pipe member according to a fifth embodiment of the present invention;

Figure 19 is a front elevational view showing the T-shaped pipe member of the fifth embodiment of the present invention;

Figure 20 is a cross-sectional view taken along line F - F of Figure 19;

Figure 21 is a perspective structural view of a sixth embodiment of the present invention;

Figure 22 is a front elevational view of the sixth embodiment of the present invention;

Figure 23 is a cross-sectional view taken along line G-G of Figure 22;

Figure 24 is a perspective structural view of a T-shaped pipe member according to a seventh embodiment of the present invention;

Figure 25 is a front elevational view showing the T-shaped pipe member of the present invention;

Figure 26 is a cross-sectional view taken along line H - - H in Figure 22 .

detailed description

Embodiment 1 Referring to FIG. 1 to FIG. 5, a T-shaped pipe member of the present invention includes a support pipe 11, a connecting pipe 21, and a pre-welded connecting member 31. The supporting pipe 11 and the connecting pipe 21 are respectively round pipes, The welding connector 31 is a flat sheet metal member; the first end of the connecting tube 21 is provided with an end surface corresponding to the shape of the outer wall of the supporting tube, and the connecting tube 21 is connected to the supporting tube 11 at a 90-degree T shape through the end surface thereof, and is connected. The tube wall of the first end of the tube 21 is vertically symmetrically provided with two through holes 211 for introducing the lumen; the first end surface of the pre-welded joint 31 and the support The outer wall of the tube 11 is welded, and the welded portion is 311. The pre-welded connecting member 31 is integrally sleeved in the tube wall of the first end of the connecting tube 21 by the second end, and the two sides of the pre-welded connecting member 31 are respectively opposite. At the through hole 211, the side end of the pre-welded joint 31 is welded to the inner wall of the joint pipe 21 through the through hole 211 in the wall of the first end pipe of the joint pipe 21.

Wherein, the pre-welding connector 31 has two directions and the inner surface of the connecting pipe 21 has a small gap or a tight fit. When welding, the two side walls of the pre-welding connector 31 are respectively transmitted through the through hole 211 of the connecting pipe to the connecting pipe. The inner wall of the connecting pipe 21 is pre-machined into a shape conforming to the shape of the supporting pipe so as to be tightly coupled after joining; for a better T-shaped connecting appearance, the connecting pipe 21 and the supporting pipe 11 can be used The flash welding or the electric resistance welding is joined together, and the pre-welded connecting member 31 and the connecting pipe 21 are welded together through the holes provided in the connecting pipe 21.

At the time of manufacture, the pre-welded joint member 31 is first welded to the outer wall of the support pipe 11, and then the pre-welded joint member 31 is integrally placed into the joint pipe 21, and the pre-welded joint member 31 and the joint are connected through the hole 211 provided in the joint pipe 21. The tubes 21 are welded together so that the support tube 11 and the connecting tube 21 complete the T-connection. This welding method allows the weld bead between the pre-welded joint member 31 and the support pipe 11 to be completely covered by the joint pipe 21, so that it is no longer necessary to polish the weld bead.

Embodiment 2, as shown in FIG. 6 to FIG. 11, a T-shaped pipe member of the present invention includes a support pipe 12, a connecting pipe 22, and a pre-welded connecting member 32; the supporting pipe 12 and the connecting pipe 22 are respectively circular pipes, and The welded connector 32 is a flat sheet metal piece;

The difference from the first embodiment is that the first end of the connecting tube 21 is provided with an end surface corresponding to the shape of the outer wall of the supporting tube, and the connecting tube 21 is connected to the supporting tube 11 by a T-shape at a non-90 degree through the end surface thereof. The pipe wall of the first end of the connecting pipe 22 is respectively provided with two through holes 221 which open into the pipe cavity; the first end face of the pre-welding connecting member 32 is fixed to the outer wall of the pipe of the supporting pipe 12, and the welded portion thereof is welded. 321 , the pre-welded connector 32 is integrally sleeved in the tube wall of the first end of the connecting tube 22 from the second end, and the side ends of the pre-welding connector 32 are respectively opposite to the through hole 221 , and the first through the connecting tube 22 . The through hole 221 in the end pipe wall fixes the side end of the pre-welded joint 32 to the inner wall of the connecting pipe 22.

Embodiment 3, Referring to FIG. 12 to FIG. 14, a T-shaped pipe member of the present invention comprises a support pipe 13, a connecting pipe 23, and a pre-welded connecting member 33;

The difference from the first embodiment is that the support tube 13 is a square tube;

The first end of the connecting pipe 23 is provided with an end face corresponding to the shape of the outer wall of the support pipe, and the connecting pipe 23 passes The end surface of the connecting tube 13 is connected to the support tube 13 at a 90-degree T shape, and the tube wall of the first end of the connecting tube 23 is vertically symmetrically provided with two through holes 231 for introducing the lumen; the first end of the pre-welded connecting member 33 The end surface is fixed to the outer wall of the tube of the support tube 13, and the welded portion is 331. The pre-welded connecting member 33 is integrally sleeved in the tube wall of the first end of the connecting tube 23 from the second end, and the side end of the pre-welding connecting member 33 The side end of the pre-welded joint 33 is welded to the inner wall of the connecting pipe 23 at the through hole 231 through the through hole 231 in the first end pipe wall of the connecting pipe 23, respectively.

Embodiment 4, Referring to Figures 15 to 17, a T-shaped pipe member of the present invention includes a support pipe

14. Connecting pipe 24, pre-welding connector 34;

The difference from the first embodiment is that the support tube 13 and the connecting tube 24 are square tubes; the pre-welded connecting member 34 is a U-shaped sheet metal member;

The first end of the connecting pipe 24 is provided with an end surface corresponding to the shape of the outer wall of the supporting pipe, that is, a flat surface, and the connecting pipe 24 is connected to the supporting pipe 14 at a 90-degree T shape through the end surface thereof, and the first end of the connecting pipe 24 is connected. The tube wall is vertically symmetrically provided with four through holes 241 for introducing the lumen; the first end surface of the pre-welding connector 34 is fixed to the outer wall of the tube of the support tube 14, and the welded portion is 341, and the pre-welded joint 34 The second end is integrally sleeved in the wall of the first end of the connecting pipe 24, and the side ends of the pre-welded connecting member 34 are respectively opposite to the through holes 241 at the through-hole 241 of the first end pipe wall of the connecting pipe 24. The side end of the pre-weld connector 34 is fixed to the inner wall of the connecting pipe 24.

Embodiment 5, Referring to Figures 18 to 20, a T-shaped pipe member of the present invention includes a support pipe

15. Connecting pipe 25, pre-welding connector 35;

The difference from the fourth embodiment is that the tube wall of the first end of the connecting tube 25 is provided with four through holes 251 which are respectively connected to the lumen;

The first end of the connecting pipe 25 is provided with an end surface corresponding to the shape of the outer wall of the supporting pipe, that is, a flat surface, and the connecting pipe 25 is connected to the supporting pipe 15 at a 90-degree T shape through the end surface thereof, and the first end of the connecting pipe 25 is connected. The front and rear symmetry of the pipe wall are respectively provided with four through holes 251 which open into the pipe cavity; the first end face of the pre-welding joint member 35 is fixed to the outer wall of the pipe of the support pipe 15, and the welded portion thereof is 351, and the pre-welded joint member 35 The second end is integrally sleeved in the wall of the first end of the connecting pipe 25, and the side ends of the pre-welded connecting member 35 are respectively opposed to the through holes 251 at the first end pipe wall of the connecting pipe 25. The side end of the pre-welded connector 35 is fixed to the inner wall of the connecting pipe 25.

Embodiment 6 Referring to FIG. 21 to FIG. 23, a T-shaped pipe member of the present invention includes a support pipe. 16, a connecting pipe 26, a pre-welded connector 36;

The difference from the first embodiment is that the connecting pipe 26 is a bent pipe; the pre-welded connecting member 36 is bent into a sheet metal member corresponding to the connecting pipe 26;

The first end of the connecting pipe 26 is provided with an end surface corresponding to the shape of the outer wall of the supporting pipe, that is, a flat surface, and the connecting pipe 26 is connected to the supporting pipe 16 at a 90-degree T shape through the end surface thereof, and the first end of the connecting pipe 26 is connected. The front and rear symmetry of the pipe wall are respectively provided with four through holes 261 which open into the pipe cavity; the first end face of the pre-welding joint member 36 is fixed to the outer wall of the pipe of the support pipe 16, and the welded portion thereof is 361, and the pre-welded joint member 36 The second end is integrally sleeved in the wall of the first end of the connecting pipe 26, and the side ends of the pre-welded connecting member 36 are respectively opposed to the through holes 261, and the through holes 261 of the first end pipe wall of the connecting pipe 26 are passed through. The side end of the pre-welded connector 36 is fixed to the inner wall of the connecting pipe 26.

Embodiment 7 Referring to Figures 24 to 26, a T-shaped pipe member of the present invention includes a support pipe

17. Connecting pipe 27, pre-welding connector 37;

The difference from the first embodiment is that the support tube 17 is a square tube; the pre-welded connection member 37 is a stepped pin;

The first end of the connecting pipe 27 is provided with an end surface corresponding to the shape of the outer wall of the supporting pipe, that is, a flat surface, and the connecting pipe 27 is connected to the supporting pipe 17 at a 90-degree T shape through the end surface thereof, and the first end of the connecting pipe 27 is connected. The pipe wall is vertically symmetrically provided with a through hole 271 which opens into the pipe cavity; the first end face of the pre-twisting connecting member 37 is fixed to the outer wall of the pipe of the support pipe 17, and the welded portion is 371, and the pre-welded connecting member 37 is The two ends are integrally sleeved in the wall of the first end of the connecting pipe 27, and the side ends of the pre-welded connecting members 37 are respectively opposite to the through holes 271 through the through holes 271 in the first end pipe wall of the connecting pipe 27. The side end of the welded joint 37 is fixed to the inner wall of the connecting pipe 27.

Industrial applicability

The invention relates to a T-shaped pipe fitting, which uses a pre-welded connecting piece to weld and fix the supporting pipe and the connecting pipe into a T-shaped pipe fitting, which is convenient in processing, reasonable in design, suitable for mass industrial production, and has good industrial applicability.

Claims

A T-shaped pipe member, comprising: a support pipe, a connecting pipe, and a pre-welded joint; the first end of the connecting pipe is provided with an end face corresponding to the shape of the outer wall of the support pipe, and the connecting pipe passes through the end face and the support thereof The tube is connected in a τ shape, and the tube end of the first end of the connecting tube is provided with a through hole for introducing the tube cavity; the first end surface of the pre-welding connecting piece is fixed to the outer wall of the tube of the supporting tube, and the pre-welding connecting piece is fixed The second end is integrally sleeved in the wall of the first end of the connecting pipe, and is fixed to the inner wall of the connecting pipe through the through hole in the pipe wall of the first end of the connecting pipe.

2. A Τ-shaped tubular member according to claim 1, wherein: the through-holes in the wall of the connecting tube are one or more single-walled holes or elongated holes.

3. A Τ-shaped pipe member according to claim 1, wherein: the through hole in the pipe wall of the connecting pipe is a long groove provided on the first end pipe wall of the connecting pipe.

4. A Τ-shaped tubular member according to claim 1, wherein: said pre-welded connector has at least one direction and a small gap or a tight fit of the inner surface of the connecting tube.

A Τ-shaped pipe member according to claim 1, wherein: the end face of said connecting pipe is previously machined into a shape conforming to the shape of the supporting pipe.

6. A Τ-type tubular member according to claim 1, wherein: said pre-welded connector is a flat sheet metal member.

7. A Τ-shaped tubular member according to claim 1, wherein: said pre-welded joint member is a sheet metal member folded into a U shape.

8. A Τ-type tubular member according to claim 1, wherein: said pre-welded connector is a stepped pin.

9. The 管-type pipe fitting according to claim 1, wherein: the joint between the support pipe and the connecting pipe is connected by electric resistance welding.

10. A Τ-type tubular member according to claim 1, wherein the junction of the support tube and the connecting tube is connected by flash welding.