CN102632098B - Deformation processing device and method of tubular workpiece - Google Patents

Abstract

The invention discloses a deformation processing device for a tubular workpiece and a processing method thereof. The tubular workpiece is deformed through progressive forming, and required tooth shapes or other shapes are processed on the tubular workpiece. The invention can realize the progressive molding of the tubular workpiece, and the molding process is completed while the workbench rotates once, and the work efficiency is high; the overall device is light in weight, and the transmitted torque is large; the invention adopts the cold molding technology, without heating and oxidation Skin and decarburization layer, no thermal deformation, higher product precision; multi-station progressive forming, small forming force, long mold life; the equipment of the present invention occupies a smaller area than ordinary multi-station forming machines, and is easy to replace molds.

Description

A deformation processing device and processing method for a tubular workpiece

technical field

The invention relates to a processing device and method for a tubular workpiece, in particular to a deformation processing device and a processing method for a tubular workpiece.

Background technique

A rack is a bar with teeth used to mesh with a pinion, bevel gear or worm gear. Racks are divided into straight toothed racks and helical toothed racks, which are paired with straight toothed cylindrical gears and helical toothed cylindrical gears respectively; the tooth profile of the rack is a straight line instead of an involute (for the tooth surface, it is a plane), It is equivalent to a cylindrical gear with a pitch circle radius of infinity.

At present, most of the racks are processed by milling, and the required tooth shape is processed on the rod by a lifting table milling machine. However, this kind of processing requires a large-scale milling machine and occupies a large area; if the rack with high hardness is processed , the loss of the milling machine is large, and the life of the main engine is small. Processing efficiency is low.

At the same time, milling and grinding can only process racks with equal cross-sections, and are helpless for variable-section products such as variable-ratio racks. Efficient and high-quality processing of such products is still better with plastic processing technology. The mechanical strength of the parts is high, the production efficiency is high, the product precision is good, and the shape is not limited by the tool and machine tool trajectory.

Contents of the invention

Purpose of the invention: The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a deformation processing device and a processing method for a tubular workpiece, which deforms the tubular workpiece through progressive forming, and processes the required tooth profile or other shapes on the tubular workpiece. shape.

Technical solution: the present invention is achieved through the following technical solutions. The present invention includes a workbench, a punch assembly, a mold assembly and a top cover; there are at least two groups of the mold assemblies, which are respectively arranged on the workbench; the top cover is arranged on the mold The top of the assembly; the positions of the punch assembly and the die assembly are corresponding; the workbench is a rotary workbench.

There are at least two groups of punch assemblies, which are arranged outside the workbench. The punch assembly includes a base and a punch, and the punch is movably arranged on the base.

The punch is conical, and the diameter of the punch increases sequentially along the clockwise or counterclockwise direction of the worktable.

The mold assembly includes an upper mold and a lower mold, the upper mold is located under the top cover, the lower mold is arranged on the workbench, a mold cavity is formed between the upper mold and the lower mold, and the punch is aligned with the mold cavity.

A compression block is provided between the upper mold and the top cover, and the compression block is used to fill the gap between the upper mold and the top cover of the mold assembly. The compression block is adjustable in height, and the adjustment of the compression block can be done from the workbench Remove the mold assembly.

A method for deforming a tubular workpiece, using the device for deforming a tubular workpiece of the present invention, comprising the following steps:

(1) Place the preformed tubular workpiece between the upper mold and the lower mold, close the mold, and use the top cover to press the upper mold and the lower mold;

(2) The rotary table inserts each punch into the inner wall of the tubular workpiece in turn according to the diameter of the punch from small to large, and the tubular workpiece is gradually deformed to obtain the required shape on the outer wall of the tubular workpiece;

(3) Open the mold and take out the processed tubular workpiece

Beneficial effects: Compared with the prior art, the present invention has the following advantages: the present invention can realize the progressive forming of the tubular workpiece, and the forming process is completed while the workbench rotates once, and the work efficiency is high; the overall weight of the device is light, and the transmitted torque is large ; The present invention is a cold forming technology without heating, no scale and decarburization layer, no thermal deformation, and higher product precision; multi-station progressive forming, small forming force, and high mold life; the equipment of the present invention is more than ordinary The station forming machine occupies a small area and is easy to replace the mold.

Description of drawings

Fig. 1 is the front view of the deformation processing device of tubular workpiece of the present invention;

Fig. 2 is a plan view of the deformation processing device for a tubular workpiece according to the present invention.

Detailed ways

The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

As shown in Figures 1 and 2, this embodiment includes a workbench 1, a punch assembly 2, a die assembly 3 and a top cover 4; in this embodiment, there are six groups of die assemblies 3, which are evenly arranged on the workbench 1, correspondingly The included angle adjacent to the mold assembly 3 is 60 degrees; the top cover 4 is arranged on the top of the mold assembly 3; the positions of the punch assembly 2 and the mold assembly 3 are corresponding; the workbench 1 of this embodiment is a rotary workbench, and the The center of 1 drives the workbench 1 to rotate through the rotating shaft.

The punch assembly 2 of present embodiment has five groups, is arranged on the outside of workbench 1, and punch assembly 2 comprises base 5 and punch 6, and punch 6 is arranged on base 5 movably; Punch 6 is conical, punch The diameter of 6 increases successively along the clockwise direction of workbench 1.

The mold assembly 3 includes an upper mold 7 and a lower mold 8, the upper mold 7 is located under the top cover 4, the lower mold 8 is arranged on the workbench 1, a mold cavity is formed between the upper mold 7 and the lower mold 8, and the punches 6 pairs Quasi-die cavity, top cover 4 is pressed on the patrix 7 during work. The upper mold 7 is provided with the shape of the tubular workpiece that needs to be processed. In other embodiments, it can also be set on the lower mold 8. The purpose of this embodiment is to process the tubular workpiece into a rack, that is, the upper mold 7 is provided with a tooth profile.

A compression block 9 is provided between the upper die 7 and the top cover 4, and the compression block 9 is used to fill the gap between the upper die 7 and the top cover 4 of the mold assembly 3. The compression block 9 is height adjustable, and the compression block 9 is adjustable. Tight block 9 can take off mold 8 mold assembly 3 from table 1.

Since the main molding is on the outer wall of the workpiece, after the molding is completed, the teeth of the mold and the workpiece are staggered, and the workpiece cannot be taken out without opening the mold. In this embodiment, the punch assembly 2 is one less than the mold assembly 3, which can be used as five punches. 6 are all in the mold cavity of mold assembly 3 when tubular workpiece is extruded, still have a mold assembly 3 to be in vacant position, adjust pressing block 9 and just can open mold, take out the workpiece processed in the mould.

The method for processing a tubular workpiece using the device comprises the following steps:

(1) Place the preformed tubular workpiece between the upper mold 7 and the lower mold 8, close the molds, use the top cover 4 to press the upper mold 7 and the lower mold 8, and slightly flatten the top of the preformed tubular workpiece , to facilitate mold pressing;

(2) Rotate the table 1, according to the diameter of the punch 6 from small to large, insert each punch 6 into the tube of each tubular workpiece in a clockwise direction, and then pull it out to form gradually;

(3) After one revolution, move the mold assembly 3 with the formed workpiece to the empty position, that is, the loading and unloading station, that is, the position without the punch 6, release the pressure from the pressing block 9, open the mold, and take out the workpiece; or The punch 6 is returned, the pressing block 9 is adjusted, and the workpiece is taken out, and the top of the workpiece processes the required tooth shape at this time.

Claims (2)

1. A deformation processing device for a tubular workpiece, comprising a workbench (1), a punch assembly (2), a die assembly (3) and a top cover (4); it is characterized in that the die assembly (3) has at least The two groups are respectively arranged on the workbench (1); the top cover (4) is arranged on the top of the mold assembly (3); the positions of the punch assembly (2) and the mold assembly (3) are corresponding; the workbench ( 1) is a rotary workbench, the punch (6) is conical, the diameter of the punch (6) increases sequentially along the clockwise or counterclockwise direction of the workbench (1), and the punch assembly (2) is at least There are two groups, arranged outside the workbench (1), the punch assembly (2) includes a base (5) and a punch (6), the punch (6) is movably arranged on the base (5), and the mold Component (3) comprises upper die (7) and lower die (8), upper die (7) is positioned under top cover (4), lower die (8) is arranged on the workbench (1), upper die (7 ) and the lower mold (8) to form a mold cavity, the punch (6) is aligned with the mold cavity, and a pressing block (9) is arranged between the upper mold (7) and the top cover (4), and the pressing The tight block (9) is adjustable in height, and the punch assembly (2) has one less piece than the die assembly (3). 2. A deformation processing method of a tubular workpiece, characterized in that, adopting the deformation processing device of the tubular workpiece according to claim 1, comprising the following steps: (1) After preforming the tubular workpiece, place it between the upper mold (7) and the lower mold (8), close the molds, and use the top cover (4) to compress the upper mold (7) and the lower mold (8); (2) Rotate the worktable (1), according to the diameter of the punches (6) from small to large, insert each punch (6) into the inner wall of the tubular workpiece in sequence, and the tubular workpiece is gradually deformed, so that the outer wall of the tubular workpiece can obtain the required shape; (3) Open the mold and take out the processed tubular workpiece.