Sewing machine body and method for making the same

Abstract

A method for making a sewing machine includes step of cutting a board into pieces with desired sizes; step of pressing the pieces to have deformation portions to obtain enclosed or semi-enclosed parts; step of welding sides of each of the parts into welding portions so as to obtain frameworks with hollow interiors; step of welding connection plates to the frameworks to form the sewing machine body, and step of final finishing the sewing machine body. The sewing machine body includes a main frame composed of frameworks which are composed of a plurality of sidewalls and each framework includes a hollow interior defined and enclosed by the sidewalls. Connection plates are used to connect the frameworks.

1 . A method for making a sewing machine body comprising: 
 step 1: pressing pieces ( 50 ) to have deformation portions ( 51 ) so as to obtain enclosed or semi-enclosed parts;    step 2: welding sides of each of the pieces ( 50 ) into welding portions ( 52 ) so as to obtain frameworks ( 200 ) with hollow interiors ( 201 );    step 3: welding the frameworks ( 200 ) to form the sewing machine body, and;    step 4: final finishing the sewing machine body.    
   
   
       2 . The method as claimed in  claim 1 , wherein the pieces ( 50 ) are made by cutting a board into the pieces ( 50 ) with desired sizes.  
   
   
       3 . The method as claimed in  claim 1 , wherein the sewing machine body includes a main frame ( 20 ) composed of a plurality of frameworks ( 200 ) and each of the frameworks ( 200 ) is composed of a plurality of sidewalls.  
   
   
       4 . The method as claimed in  claim 1 , wherein one of the hollow interiors ( 201 ) is enclosed by four sidewalls which form as a rectangular cross section.  
   
   
       5 . The method as claimed in  claim 1 , wherein one of the hollow interiors ( 201 ) is partially enclosed by three sidewalls which form as a U-shaped cross section.  
   
   
       6 . The method as claimed in  claim 1 , wherein one of the hollow interiors ( 201 ) is partially enclosed by an H-shaped sidewall which forms as a U-shaped cross section.  
   
   
       7 . The method as claimed in  claim 4 , wherein the frameworks ( 200 ) are a first part ( 21 ), a second part ( 22 ) and a third part ( 23 ) of the main frame ( 20 ), the first part ( 21 ) is received in a base ( 11 ) of the sewing machine body ( 10 ).  
   
   
       8 . The method as claimed in  claim 7 , wherein the second part ( 22 ) is connected to between the first part ( 21 ) and the third part ( 23 ), the second part ( 22 ) being received in an upright part ( 12 ) of the sewing machine body ( 10 ).  
   
   
       9 . The method as claimed in  claim 8 , wherein the third part ( 23 ) is received in an arm ( 13 ) of the sewing machine body ( 10 ).  
   
   
       10 . The method as claimed in  claim 7 , wherein connection plates ( 30 ) are connected to respective sides of the first part ( 21 ), the second part ( 22 ) and the third part ( 23 ).  
   
   
       11 . The method as claimed in  claim 10 , wherein the connection plates ( 30 ) are integrally welded to the first part ( 21 ), the second part ( 22 ) and the third part ( 23 ).