CN110681771A

CN110681771A - Forming device of reverse taper workpiece

Info

Publication number: CN110681771A
Application number: CN201910880037.0A
Authority: CN
Inventors: 汪建国; 程忠诚; 杨文林
Original assignee: CHANGHUI PRECISION MOLD (HUANGSHAN) Co Ltd
Current assignee: CHANGHUI PRECISION MOLD (HUANGSHAN) Co Ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-01-14

Abstract

The application discloses forming device of reverse taper work piece, forming device includes: the device comprises an upper die frame, a lower die frame, an upper die rod and a lower swing block; the lower die frame is positioned below the upper die frame and is arranged corresponding to the upper die frame; the upper die rod is obliquely and slidably arranged in the upper die frame; the lower swing block is arranged on the lower die frame and rotates relative to the lower die frame; when the upper die frame and the lower die frame are closed, the upper die rod and the lower swing block are matched to process a workpiece to form the reverse taper workpiece; when the upper die frame and the lower die frame are separated, the upper die rod slides towards the lower die frame in an inclined mode, and one end, close to the lower die frame, of the upper die rod is far away from the reverse taper workpiece. After the upper die rod is processed, the workpiece with the reverse taper moves obliquely, so that the workpiece with the reverse taper can be more conveniently returned.

Description

Forming device of reverse taper workpiece

Technical Field

The application relates to the field of mold design, in particular to a forming device for a reverse taper workpiece.

Background

The structure of the stamping die is a critical factor of the working stability, the service life, the quality of a product and the operability of the die, the structure of the die depends on the structure of the product on one hand and the experience and innovation capability of a designer on the other hand, and as the production period of the stamping part is shorter and shorter, the efficiency is higher and higher, and the cost is further reduced.

Because the similar parts have inward reverse taper, if a common production process is adopted, the reverse taper can be clamped on an upper die after the parts are stamped, an operator needs to take out the parts from the upper die by using tweezers, the operability of the die is poor, the operation is unsafe, and the production quality and the efficiency of the parts are influenced.

Disclosure of Invention

The purpose of this application is to provide a forming device of reverse tapering work piece, makes the work piece material returned with reverse tapering more convenient.

The application discloses forming device of reverse taper work piece, forming device includes: the device comprises an upper die frame, a lower die frame, an upper die rod and a lower swing block; the lower die frame is positioned below the upper die frame and is arranged corresponding to the upper die frame; the upper die rod is obliquely and slidably arranged in the upper die frame; the lower swing block is arranged on the lower die frame and rotates relative to the lower die frame; when the upper die frame and the lower die frame are closed, the upper die rod and the lower swing block are matched to process a workpiece to form the reverse taper workpiece; when the upper die frame and the lower die frame are separated, the upper die rod slides towards the lower die frame in an inclined mode, and one end, close to the lower die frame, of the upper die rod is far away from the reverse taper workpiece.

Optionally, the upper die frame comprises an upper die base, an upper die plate, an upper die fixing plate and a guide plate which are sequentially arranged from top to bottom; the upper die plate is provided with a first cavity, the upper die fixing plate and the guide plate are provided with second inclined cavities communicated with the first cavity, and the second inclined cavities obliquely penetrate through the upper die fixing plate and the guide plate; the forming device comprises a pressure spring, the pressure spring is arranged in the first cavity, one end of the pressure spring is abutted to the upper die base, the other end of the pressure spring is in contact with the upper die rod, and elasticity towards the direction of the lower die base is applied to the upper die rod.

Optionally, the lower die frame comprises a lower die base, a lower die fixing plate, a positioning plate and a lower die rod fixed on the lower die base and penetrating through the lower die fixing plate and the positioning plate, which are sequentially arranged from bottom to top, and the lower die rod and one end of the positioning plate, which is close to the upper die frame, are located on the same horizontal line; the lower swing block comprises a fixed shaft, the lower swing block is movably arranged on the top end of the upper die frame through the fixed shaft, the lower die rod is close to the top end of the upper die frame, a third cavity is arranged in the lower die rod, the forming device comprises a spring, the spring is arranged in the third cavity, one end of the spring is in contact with the bottom of the third cavity, the other end of the spring is abutted to the lower swing block, and power is provided for rotation of the lower swing block.

Optionally, the forming device includes a fourth cavity and an upper mold cylindrical pin, the fourth cavity penetrates through the upper mold base, the upper mold plate, the upper mold fixing plate and the guide plate, and the upper mold cylindrical pin is located in the fourth cavity and fixes relative positions among the upper mold base, the upper mold plate, the upper mold fixing plate and the guide plate; the forming device comprises a fifth cavity and a lower die cylindrical pin, the fifth cavity penetrates through the lower die base, the lower die fixing plate and the positioning plate, and the lower die cylindrical pin is located in the fifth cavity and fixes the relative positions of the lower die base, the lower die fixing plate and the positioning plate.

Optionally, a sixth cavity is formed in the lower die fixing plate, a seventh cavity is vertically formed in the lower die base corresponding to the sixth cavity, and a threaded hole corresponding to the sixth cavity is formed in one side, close to the fixing plate, of the positioning plate; the forming device comprises a discharging screw and a top spring, the top spring is arranged in the sixth cavity, and the discharging screw penetrates through the seventh cavity and the top spring to be in threaded connection with the threaded hole; the top spring provides upward elastic force for the positioning plate after the workpiece is machined, the positioning plate is used for discharging, the screw head of the discharging screw correspondingly moves in the seventh cavity when the reverse taper of the discharged workpiece is machined, and the seventh cavity limits the moving range of the discharging screw.

Optionally, the forming device includes a positioning column, and the positioning column is fixed in the middle of the positioning plate and used for fixing the workpiece.

Optionally, the positioning column is provided with a vertical strip-shaped groove corresponding to the upper mold rod, and when the upper mold frame and the lower mold frame are closed, the strip-shaped groove provides a space for movement of the upper mold rod.

Optionally, the forming device includes two hollow cylinders symmetrically disposed and two fixing columns correspondingly disposed to the hollow cylinders, an inner diameter of each hollow cylinder is the same as a diameter of each fixing column, each hollow cylinder is disposed on the upper die carrier, each fixing column is disposed on the lower die carrier, and each hollow cylinder is sleeved on the corresponding fixing column and used for fixing a relative position between the upper die carrier and the lower die carrier.

For the scheme that anti-tapering work piece of general mould processing needs the manual work to get the piece, this application processing is anti-tapering work piece back, go up the mould frame and shift up and drive the mould pole and move up, go up the mould pole and tilt up and can slide on last mould frame, consequently the mould pole is along the angle gliding of slope under the action of gravity, the tilt state makes the contact one end of last mould pole and work piece move gradually to the direction of keeping away from the work piece, thereby it keeps away from the phenomenon that the work piece removed to present the level at the processing end of last mould pole, make the mould pole keep away from the work piece earlier in the horizontal direction, follow the mould frame rebound again, thereby when having avoided going up the mould pole rebound, can drive anti-tapering work piece and shift up, the labor cost.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of an apparatus for forming a reverse taper workpiece according to an embodiment of the present application;

FIG. 2 is a schematic view of another apparatus for forming a reverse tapered workpiece according to an embodiment of the present application;

FIG. 3 is a schematic view of an upper mold frame of a forming apparatus according to an embodiment of the present application;

fig. 4 is a schematic view of a lower mold frame of a molding apparatus of another embodiment of the present application.

100, a forming device; 110. feeding a mold frame; 120. a lower die frame; 130. a mold rod is arranged; 140. a lower swing block; 150. a pressure spring; 160. a spring; 170. a fourth cavity; 180. an upper die cylindrical pin; 190. a fifth cavity; 210. a lower die cylindrical pin; 220. a discharge screw; 230. a spring is supported; 240. a positioning column; 250. a hollow cylinder; 260. fixing a column; 270. a power column; 111. an upper die holder; 112. an upper die plate 113 and an upper die fixing plate; 114. a guide plate; 115. a first cavity; 116. a second inclined cavity; 121. a lower die holder; 122. a lower die fixing plate; 123. positioning a plate; 124. a lower mold rod; 125. a third cavity; 126. a sixth cavity; 128. a threaded hole; 127. a seventh cavity; 141. a fixed shaft; 241. a strip-shaped groove; 300 reverse taper workpiece.

Detailed Description

It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.

Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The present application is described in detail below with reference to the figures and alternative embodiments.

As shown in fig. 1 and 2, as another embodiment of the present application, the present application discloses a forming apparatus 100 for a reverse tapered workpiece 300, the forming apparatus 100 comprising: an upper mold frame 110, a lower mold frame 120, an upper mold rod 130 and a lower swing block 140; the lower mold frame 120 is positioned below the upper mold frame 110 and is arranged corresponding to the upper mold frame 110; the upper mold rod 130 is arranged in the upper mold frame 110 in an inclined sliding manner; the lower swing block 140 is disposed on the lower mold frame 120 and rotates relative to the lower mold frame 120; when the upper die frame 110 and the lower die frame 120 are closed, the upper die rod 130 and the lower swing block 140 are matched to process a workpiece to form the reverse taper workpiece 300; when the upper mold frame 110 and the lower mold frame 120 are separated, the upper mold rod 130 slides obliquely towards the lower mold frame 120, and one end of the upper mold rod 130 close to the lower mold frame 120 is far away from the reverse taper workpiece 300.

Compared with the scheme that the reverse taper workpiece 300 is machined by a common die and needs manual workpiece taking, after the reverse taper workpiece 300 is machined by the application, the upper die frame 110 moves upwards and drives the upper die rod 130 to move upwards, the upper die rod 130 tilts and can slide on the upper die frame 110, so the upper die rod 130 slides downwards along the inclined angle under the action of the spring, the contact end of the upper die rod 130 and the workpiece gradually moves towards the direction far away from the workpiece in the inclined state, the machining end of the upper die rod 130 is horizontally far away from the workpiece, the upper die rod 130 firstly keeps away from the workpiece in the horizontal direction and then upwards moves along with the upper die frame 110, and therefore when the upper die rod 130 moves upwards, the reverse taper workpiece 300 can be driven to move upwards, the labor cost is saved, and the operation time of workers is reduced.

As shown in the drawing, the reverse taper workpiece 300 of the present application has three reverse taper positions, and therefore, the number of the upper mold rods 130 is also three, and the number of the lower swing blocks 140 is also correspondingly three.

The upper die carrier 110 comprises an upper die holder 111, an upper die plate 112, an upper die fixing plate 113 and a guide plate 114 which are arranged in sequence from top to bottom; the upper die plate 112 is provided with a first cavity 115, the upper die fixing plate 113 and the guide plate 114 are provided with a second inclined cavity 116 communicated with the first cavity 115, and the second inclined cavity 116 obliquely penetrates through the upper die fixing plate 113 and the guide plate 114; the forming device 100 includes a pressure spring 150, the pressure spring 150 is disposed in the first cavity 115, one end of the pressure spring is abutted to the upper die holder 111, and the other end of the pressure spring is contacted with the upper die rod 130, so as to apply an elastic force to the upper die rod 130 in a direction toward the lower die holder 120.

In order to ensure that the upper mold rod 130 can always slide downwards in the second inclined cavity 116 and cannot be blocked, a pressure spring 150 is arranged in the first cavity 115, the pressure spring 150 is always in a compression state, when the upper mold frame 110 and the lower mold frame 120 are closed, the upper mold rod 130 moves upwards along the second inclined cavity 116 to compress the pressure spring 150 into the first cavity 115, and when the upper mold frame 110 and the lower mold frame 120 are separated, the upper mold rod 130 is pushed downwards by the pressure spring 150.

In order to prevent the upper mold bar 130 from falling out of the guide plate 114 completely, the aperture of the cavity of the guide plate 114 is smaller than the aperture of the upper mold fixing plate 113, so that the end of the upper mold bar 130 is the same as the aperture of the upper mold fixing plate 113, and the end of the upper mold bar 130 does not enter the second inclined cavity 116, thereby restricting the movement of the upper mold bar 130.

The lower die carrier 120 comprises a lower die holder 121, a lower die fixing plate 122, a positioning plate 123 and a lower die rod 124 fixed on the lower die holder 121 and penetrating through the lower die fixing plate 122 and the positioning plate 123, wherein the lower die rod 124 and one end, close to the upper die carrier 110, of the positioning plate 123 are located on the same horizontal line; the lower swing block 140 includes a fixing shaft 141, the lower swing block 140 is movably disposed on the top end of the lower mold rod 124 close to the upper mold frame 110 through the fixing shaft 141, a third cavity 125 is disposed in the lower mold rod 124, the forming device 100 includes a spring 160, the spring 160 is disposed in the third cavity 125, one end of the spring 160 contacts with the bottom of the third cavity 125, and the other end of the spring 160 abuts against the lower swing block 140 to provide power for the rotation of the lower swing block 140.

During discharging, the upper mold rod 130 moves upwards after being away from the reverse taper workpiece 300, and the workpiece is further fixed on the lower mold frame 120, so that the lower swing block 140 is arranged on the lower mold frame 120, the lower swing block 140 can form the reverse taper workpiece 300, and simultaneously, discharging can be assisted, and through arranging the third cavity 125 in the lower mold rod 124 and arranging the spring 160 in the third cavity 125, the spring 160 can push the lower swing block 140 to rotate so as to provide a rotating force.

Two fixing plates are arranged at the top end of the lower die rod 124, fixing holes are formed in the fixing plates, the lower swinging block 140 is fixed through the fixing shaft 141, the lower swinging block 140 is of a V-shaped structure, the fixing shaft 141 fixes the lower swinging block 140 at a bent position, the lower swinging block 140 rotates by taking the bent point as a rotation center, forming of the reverse taper workpiece 300 is guaranteed, and the function of auxiliary discharging can be achieved through the elastic force of the spring 160.

As shown in fig. 2, a sixth cavity 126 is formed in the lower mold fixing plate 122, a seventh cavity 127 is vertically formed in the lower mold base 121 corresponding to the sixth cavity 126, and a threaded hole 128 corresponding to the sixth cavity 126 is formed in one side of the positioning plate 123 close to the fixing plate; the forming device 100 comprises a discharging screw 220 and a top spring 230, the top spring 230 is arranged in the sixth cavity 126, and the discharging screw 220 is threaded with the threaded hole 128 through the seventh cavity 127 and the top spring 230; the top spring 230 provides an upward elastic force for the positioning plate 123 after the workpiece is machined, so as to unload the workpiece, the screw head of the unloading screw 220 correspondingly moves in the seventh cavity 127 when the unloading workpiece is machined to reverse taper, and the seventh cavity 127 limits the moving range of the unloading screw 220.

After the reverse taper workpiece 300 is formed, the reverse taper workpiece 300 needs to be unloaded, but the reverse taper workpiece 300 may be relatively tight on the forming device 100, and manual unloading is relatively laborious, so that firstly, material is unloaded manually through mechanical unloading, manual operation is saved, and operation time of workers is reduced, therefore, a sixth cavity 126 is arranged on the lower die fixing plate 122, a top spring 230 is arranged in the sixth cavity 126, the top spring 230 abuts against a positioning plate 123, unloading is performed through the positioning plate 123, the top spring 230 is always in a compressed state, in order to limit the distance of the positioning plate 123 ejected by the top spring 230, a threaded hole 128 is arranged on the positioning plate 123, a seventh cavity 127 is arranged on the lower die base 121, an unloading screw 220 firstly passes through the seventh cavity 127, then passes through the top spring 230, and then is in threaded connection with the threaded hole 128, the length of the unloading screw 220 ensures the movable distance of the positioning plate 123, and the unloading screw 220 can also pass through a clamp column of the seventh cavity 127, the moving distance of the positioning plate 123 is limited, and the discharging screw 220 can also adjust the ejecting distance of the positioning plate 123.

The forming device 100 comprises a fourth cavity 170 and an upper cylindrical pin 180, the fourth cavity 170 penetrates through the upper die holder 111, the upper die plate 112, the upper die fixing plate 113 and the guide plate 114, and the upper cylindrical pin 180 is located in the fourth cavity 170 and fixes the relative positions of the upper die holder 111, the upper die plate 112, the upper die fixing plate 113 and the guide plate 114; the forming device 100 comprises a fifth cavity 190 and a lower die cylindrical pin 210, the fifth cavity 190 penetrates through the lower die holder 121, the lower die fixing plate 122 and the positioning plate 123, and the lower die cylindrical pin 210 is located in the fifth cavity 190 and fixes the relative positions of the lower die holder 121, the lower die fixing plate 122 and the positioning plate 123.

The upper mold frame 110 includes an upper mold base 111, an upper mold plate 112, an upper mold fixing plate 113, and a guide plate 114, and the lower mold frame 120 includes a lower mold base 121, a lower mold fixing plate 122, and a positioning plate 123, which are required to be relatively fixed between respective layers, so that the image forming apparatus is more stable, and therefore, a fourth cavity 170 is provided on the upper mold frame 110, a fifth cavity 190 is provided on the lower mold base 121, and an upper cylindrical pin 180 and a lower cylindrical pin 210 are provided in the fourth cavity 170 and the fifth cavity 190, respectively, to limit the relative positions in the horizontal direction between the upper mold base 111, the upper mold plate 112, the upper mold fixing plate 113, and the guide plate 114, and the relative positions in the horizontal direction between the lower mold base 121, the lower mold fixing. The upper die cylindrical pin 180 and the lower die cylindrical pin 210 are respectively provided with two.

In order to fix the upper and lower

mold fixing plates

113 and 122, four screw holes 128 are provided in the upper and lower die holders 111 and 121 to fix the upper and lower

mold fixing plates

113 and 122.

The forming device 100 comprises a positioning column 240, wherein the positioning column 240 is fixed in the middle of the lower die fixing block and penetrates through the positioning plate 123, so as to fix the workpiece. When the reverse taper workpiece 300 is machined, firstly, the workpiece needs to be fixed on the lower die carrier 120, so that the positioning column 240 is arranged at the center of the positioning plate 123, when the workpiece is unloaded, the positioning plate 123 is pushed upwards by the top spring 230, the positioning column 240 is not moved, and the reverse taper workpiece 300 on the positioning column 240 is pushed out by the positioning plate 123, so that the unloading function is realized.

The positioning column 240 is provided with a vertical strip-shaped groove 241 corresponding to the upper mold bar 130, and when the upper mold frame 110 and the lower mold frame 120 are closed, the strip-shaped groove 241 provides a space for the movement of the upper mold bar 130. The positioning column 240 is further provided with a strip-shaped groove 241, which corresponds to the moving range of the upper mold bar 130 after the reverse taper workpiece 300 is processed, so that the strip-shaped groove 241 provides a moving space for the upper mold frame 110.

As shown in fig. 3 and 4, the forming apparatus 100 includes two hollow cylinders 250 symmetrically disposed and two fixing columns 260 disposed corresponding to the hollow cylinders 250, wherein an inner diameter of each hollow cylinder is the same as a diameter of the corresponding fixing column 260, the hollow columns are disposed on the upper mold frame 110, the fixing columns 260 are disposed on the lower mold frame 120, and the hollow columns are sleeved on the fixing columns 260 and used for fixing a relative position between the upper mold frame 110 and the lower mold frame 120. The position alignment is required between the upper mold frame 110 and the lower mold frame 120 to enable the machining of the reverse taper workpiece 300 to be more accurate, so that the fixing columns 260 are symmetrically arranged on the lower mold frame 120, the hollow cylinders 250 are symmetrically arranged on the upper mold frame 110, the hollow cylinders 250 and the fixing columns 260 are mutually matched to limit the relative position between the upper mold frame 110 and the lower mold frame 120, and simultaneously limit the moving position of the upper mold frame 110 and only move in the vertical direction.

The upper mold frame 110 is further provided with a power column 270, the power column 270 is arranged on one side of the upper mold frame 111 far away from the lower mold frame 120, and the power column 270 is connected to the upper mold frame 110 through threads to provide power for the up-and-down movement of the upper mold frame 110.

The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims

1. A forming apparatus for a reverse taper workpiece, the forming apparatus comprising:

feeding a mold frame;

the lower die frame is positioned below the upper die frame and corresponds to the upper die frame;

the upper die rod is obliquely and slidably arranged in the upper die frame;

the lower swing block is arranged on the lower die frame and rotates relative to the lower die frame;

when the upper die frame and the lower die frame are closed, the upper die rod and the lower swing block are matched to process a workpiece to form the reverse taper workpiece; when the upper die frame and the lower die frame are separated, the upper die rod slides towards the lower die frame in an inclined mode, and one end, close to the lower die frame, of the upper die rod is far away from the reverse taper workpiece in the horizontal direction and the vertical direction.

2. The forming device of the reverse taper workpiece according to claim 1, wherein the upper die frame comprises an upper die base, an upper die plate, an upper die fixing plate and a guide plate which are arranged in sequence from top to bottom; the upper die plate is provided with a first cavity, the upper die fixing plate and the guide plate are provided with second inclined cavities communicated with the first cavity, and the second inclined cavities obliquely penetrate through the upper die fixing plate and the guide plate;

the forming device comprises a pressure spring, the pressure spring is arranged in the first cavity, one end of the pressure spring is abutted to the upper die base, the other end of the pressure spring is in contact with the upper die rod, and elasticity towards the direction of the lower die base is applied to the upper die rod.

3. The forming device of the reverse-taper workpiece according to claim 2, wherein the lower die frame comprises a lower die base, a lower die fixing plate, a positioning plate and a lower die rod which is fixed on the lower die base and penetrates through the lower die fixing plate and the positioning plate, the lower die rod and one end, close to the upper die frame, of the positioning plate are located on the same horizontal line;

the lower swing block comprises a fixed shaft, the lower swing block is movably arranged on the lower die rod through the fixed shaft and is close to one end of the upper die base, a third cavity is formed in the lower die rod, the forming device comprises a spring, the spring is arranged in the third cavity, one end of the spring is in contact with the bottom of the third cavity, the other end of the spring is abutted to the lower swing block, and power is provided for rotation of the lower swing block.

4. The apparatus for forming a reverse taper workpiece according to claim 3, wherein the apparatus comprises a fourth cavity and an upper cylindrical pin, the fourth cavity extends through the upper die holder, the upper die plate, the upper fixing plate and the guide plate, the upper cylindrical pin is located in the fourth cavity, and the relative positions of the upper die holder, the upper die plate, the upper fixing plate and the guide plate are fixed;

the forming device comprises a fifth cavity and a lower die cylindrical pin, the fifth cavity penetrates through the lower die base, the lower die fixing plate and the positioning plate, and the lower die cylindrical pin is located in the fifth cavity and fixes the relative positions of the lower die base, the lower die fixing plate and the positioning plate.

5. The forming device for the reverse-taper workpiece according to claim 3, wherein a sixth cavity is formed in the lower die fixing plate, a seventh cavity is vertically formed in the lower die base corresponding to the sixth cavity, and a threaded hole corresponding to the sixth cavity is formed in one side, close to the fixing plate, of the positioning plate; the forming device comprises a discharging screw and a top spring, the top spring is arranged in the sixth cavity, and the discharging screw penetrates through the seventh cavity and the top spring to be in threaded connection with the threaded hole; the top spring provides upward elastic force for the positioning plate after the workpiece is machined, the positioning plate is used for discharging, the screw head of the discharging screw correspondingly moves in the seventh cavity when the reverse taper of the discharged workpiece is machined, and the seventh cavity limits the moving range of the discharging screw.

6. The apparatus for forming a reverse taper workpiece according to claim 3, wherein the apparatus comprises a positioning post fixed at a middle position of the positioning plate for fixing the workpiece.

7. The forming device of a reverse taper workpiece according to claim 6, wherein the positioning column is provided with a vertically-oriented strip-shaped groove corresponding to the upper mold rod, and when the upper mold frame and the lower mold frame are closed, the strip-shaped groove provides a space for the movement of the upper mold rod.

8. The forming device of the reverse taper workpiece according to claim 1, wherein the forming device comprises two hollow cylinders and two fixing columns, the two hollow cylinders are symmetrically arranged, the two fixing columns are arranged corresponding to the hollow cylinders, the inner diameter of each hollow cylinder is the same as the diameter of each fixing column, each hollow cylinder is arranged on the upper die frame, each fixing column is arranged on the lower die frame, and each hollow cylinder is sleeved on each fixing column and used for fixing the relative position between the upper die frame and the lower die frame.