A die for forging a cylindrical part blank with a tapered slope

Abstract

The present invention relates to a die for forging a cylindrical part blank with a tapered slope, comprising an outer shell; a first blank hole is formed at one end of the outer shell, and a sleeve hole connected to the first blank hole is formed at the other end; an inner core is sleeved within the sleeve hole; the bottom end of the inner core extends outside the outer shell; the inner core is sequentially provided with a second blank hole, a tapered hole, and a blank stripping hole from top to bottom; a spring ring is placed between the top surface of the inner core and the outer shell; a support ring is sleeved on the outer wall of the spring ring; the outer diameter of the support ring is adapted to the diameter of the sleeve hole, and is used to support and limit the spring ring; the diameters of the first blank hole, the inner hole of the spring ring, and the second blank hole are consistent, forming a blank hole therebetween for forming the blank; the tapered hole is used to form the tapered portion of the blank. The present invention has the advantages of a simple structure and can prevent the blank from being carried away by the punch, thereby affecting production progress and causing safety hazards.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a die for forging a cylindrical part blank with a tapered slope. Background Art

[0002] In the chassis shock absorption system of small passenger cars, the following Figure 1 , Figure 2 The cylindrical component with a tapered slope shown in the figure comprises a cylindrical body 1', with a tapered slope 2' machined into the upper portion of the body, and a through-hole 3' defined therein. This component is typically machined from a cylindrical steel billet, requiring both cutting the tapered slope 2' on the outside and machining the inner hole 3'. This results in a large amount of machining and significant material consumption.

[0003] For this purpose, we use Figure 3 , Figure 4 The blank is processed, and the blank includes a cylindrical blank 1", a tapered portion 2" on the upper part of the blank 1", and a blank hole 3" inside. In this way, when processing the cylindrical part with a tapered slope, the blank 1" is used to process the part body 1', the tapered portion 2" is used to process the tapered slope 2', and the blank hole 3" is used to process the inner hole 3', which greatly reduces the processing amount and material consumption.

[0004] To improve processing efficiency, the cylindrical blank with a tapered slope is generally cold-forged on a cold heading machine. A die is mounted on the base of the cold heading machine, and a punch is mounted on the hammer of the cold heading machine. The cylindrical blank with an inner hole is forged into a cylindrical blank with a tapered slope through the extrusion of the punch. Due to the need to cold-forge the tapered portion 2" and the blank hole 3" of the blank, the blank often gets stuck on the punch and is carried away by the punch. As a result, the subsequent blank conveying device cannot pick up the material from the die. With the blank on the punch, subsequent blank production cannot proceed, affecting production progress. At the same time, the blank carried away by the punch is prone to slipping and falling off the punch, creating a safety hazard. Summary of the Invention

[0005] To this end, the present invention provides a die for forging cylindrical parts with tapered slopes, which mainly solves the technical problem in the prior art that when forging cylindrical parts with tapered slopes, the forged blank is carried away by the punch, affecting the production progress and creating safety hazards.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A die for forging a cylindrical part blank with a tapered slope comprises an outer shell; a first blank hole is provided at one end of the outer shell, and a sleeve hole connected to the first blank hole is provided at the other end; an inner core is sleeved in the sleeve hole; the bottom end of the inner core extends out of the outer shell; the inner core is provided with a second blank hole, a tapered hole and a blank stripping hole that pass through from top to bottom; a spring ring is placed between the top surface of the inner core and the outer shell; a support ring is sleeved on the outer wall of the spring ring; the outer diameter of the support ring is adapted to the aperture of the sleeve hole, and is used to support and limit the spring ring; the aperture of the first blank hole, the aperture of the inner hole of the spring ring and the aperture of the second blank hole are consistent, and a blank hole is formed therebetween for forming the blank body of the blank; the tapered hole is used to form the tapered part of the blank.

[0008] Preferably, the outer diameter of the inner core is adapted to the diameter of the sleeve hole.

[0009] Preferably, the top surface of the inner core is an arc surface that descends toward the outside.

[0010] Preferably, both the left and right side walls of the shell have a shell cross-section surface that cuts downward; and a mounting platform is formed between the shell cross-section surface and the shell side wall.

[0011] Preferably, the inner core side wall has at least one inner core section surface; an air flow channel is formed between the inner core section surface and the sleeve hole wall for balancing the air pressure inside and outside the die.

[0012] Optionally, the support ring is made of polyurethane material.

[0013] The present invention has at least the following beneficial effects:

[0014] The invention provides a shell, one end of which is provided with a first blank hole, and the other end is provided with a sleeve hole, the sleeve hole is provided with an inner core, and the inner core is provided with a second blank hole, a tapered hole and a blank stripping hole which are connected from top to bottom in sequence, a spring ring is placed between the top surface of the inner core and the shell, and a support ring is sleeved on the outer wall of the spring ring, the aperture of the first blank hole, the aperture of the inner hole of the spring ring and the aperture of the second blank hole are consistent, and a blank hole is formed therebetween for forming the blank of the blank, and the tapered hole is used for forming the tapered part of the blank. When in use, a cylindrical blank with an inner hole is placed in the blank hole, and the cold heading machine hammer presses the punch downward, and the blank of the blank formed by downward pressure is wrapped by the spring ring. During the rising process of the punch, the blank of the blank is stuck by the spring ring, and is blocked by the shell, so that the blank is retained in the concave mold of the present application, thereby preventing the blank from being taken away by the punch.

[0015] It can be seen that the die for forging a cylindrical part blank with a tapered slope of the present invention has the advantages of a simple structure and can avoid the blank being carried away by the punch, which may affect the production progress and cause safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the prior art and the present invention, the following briefly introduces the drawings required for describing the prior art and the embodiments of the present invention. Obviously, the drawings described below are merely illustrative, and those skilled in the art can derive other drawings based on the provided drawings without inventive effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented. Any structural modifications, changes in proportions, or adjustments in sizes should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0018] Figure 1 It is a structural diagram of a cylindrical part with a tapered slope;

[0019] Figure 2 It is a front sectional view of a cylindrical part with a tapered slope;

[0020] Figure 3 It is a structural diagram of a cylindrical part blank with a tapered slope;

[0021] Figure 4 It is a front sectional view of a cylindrical part blank with a tapered slope;

[0022] Figure 5 This is a schematic structural diagram of a die for forging a cylindrical part blank with a tapered slope according to the present invention;

[0023] Figure 6 This is a front cross-sectional view of a die for forging a cylindrical part blank with a tapered slope according to the present invention;

[0024] Figure 7 This is a schematic structural diagram of a housing of a die for forging a cylindrical part blank with a tapered slope according to the present invention;

[0025] Figure 8 This is a front cross-sectional view of a housing of a die for forging a cylindrical part blank with a tapered slope according to the present invention;

[0026] Figure 9 This is a schematic structural diagram of an inner core of a die for forging a cylindrical part blank with a tapered slope according to the present invention;

[0027] Figure 10 This is a front cross-sectional view of an inner core of a die for forging a cylindrical part blank with a tapered slope according to the present invention;

[0028] Figure 11 This is a structural schematic diagram of the assembled state of a housing, a spring ring, and a support ring of a die for forging a cylindrical part blank with a tapered slope according to the present invention;

[0029] Figure 12 This is a front cross-sectional view of the assembled state of the housing, spring ring, and support ring of a die for forging a cylindrical part blank with a tapered slope according to the present invention;

[0030] Description of reference numerals:

[0031] 1. Outer shell; 101. First blank hole; 102. Outer shell cross-section; 103. Mounting platform; 104. Set hole; 2. Inner core; 201. Second blank hole; 202. Conical hole; 203. Blank stripping hole; 204. Inner core cross-section; 3. Support ring; 4. Spring ring. DETAILED DESCRIPTION

[0032] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0033] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0034] Terms such as "upper," "lower," "left," "right," and "center" used in this application are generally intended to facilitate intuitive understanding when compared with the accompanying drawings and are not intended to be absolute limitations on positional relationships in actual products. Changes to these relative positional relationships are considered within the scope of this application without departing from the technical concepts disclosed herein.

[0035] The present invention is a die for forging a cylindrical part blank with a tapered slope, such as Figures 4 to 12As shown, an outer shell 1 is provided, a first blank hole 101 is provided at one end of the outer shell 1, and a sleeve hole 104 connected to the first blank hole 101 is provided at the other end, an inner core 2 is sleeved in the sleeve hole 104, and the bottom end of the inner core 2 extends out of the outer shell 1, and the inner core 2 is provided with a second blank hole 201, a tapered hole 202 and a blank stripping hole 203 from top to bottom, a spring ring 4 is placed between the top surface of the inner core 2 and the outer shell 1, and a support ring 3 is sleeved on the outer wall of the spring ring 4, and the outer diameter of the support ring 3 is adapted to the aperture of the sleeve hole 104, which is used to support and limit the spring ring 4, the aperture of the first blank hole 101, the aperture of the inner hole of the spring ring 4 and the aperture of the second blank hole 201 are consistent, and a blank hole is formed therebetween for forming the blank, and the tapered hole 202 is used to form the tapered part of the blank. In this way, when in use, the outer shell 1 is fixed on the platform of the cold heading machine, the spring ring 4, the support ring 3 and the inner core 2 are tightly pressed on the cold heading machine by the outer shell 1, and the cylindrical blank with an inner hole is placed in the blank hole. The cold heading machine hammer presses the punch downward, and the blank formed by the downward pressure is wrapped by the spring ring 4. During the rising process of the punch, the blank is stuck by the spring ring 4. Under the obstruction of the outer shell 1, the blank is retained in the die of the present application; when the subsequent blank conveying device takes the blank, the stripping device of the cold forging machine pushes the blank upward from the blank stripping hole 203 at the bottom of the die of the present application, so that the blank and the die of the present application are separated, and the blank conveying device takes the blank away.

[0036] Preferably, in order to prevent the inner core 2 from shifting, the outer diameter of the inner core 2 and the diameter of the sleeve hole 104 are adapted.

[0037] Preferably, in order to buffer the pressure when the cold heading machine is pressed down and protect the inner core 2, the top surface of the inner core 2 is designed to be an arc surface that descends toward the outside of the inner core 2.

[0038] Preferably, in order to facilitate the installation of the shell 1 on the cold heading machine, the left and right side walls of the shell 1 have a downward-cut shell cross-section 102, and a mounting platform 103 is formed between the shell cross-section 102 and the side wall of the shell 1. During installation, it is only necessary to clamp the mounting platform 102 on the cold heading machine.

[0039] Preferably, in order to balance the air pressure inside and outside the die, the side wall of the inner core 2 has at least one cut inner core section surface 204, and an air flow channel is formed between the inner core section surface 204 and the hole wall of the sleeve hole 104. The internal and external air flows through the air flow channel to balance the air pressure inside and outside the die.

[0040] Optionally, the support ring 3 is made of polyurethane material, or other elastic materials.

[0041] The present application has been described in a relatively specific and detailed manner through general explanations and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations may be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by such conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. A die for forging a cylindrical part blank with a tapered slope, characterized in that: The invention comprises an outer shell (1); a first blank hole (101) is provided at one end of the outer shell (1), and a sleeve hole (104) communicating with the first blank hole (101) is provided at the other end; an inner core (2) is sleeved in the sleeve hole (104); the bottom end of the inner core (2) extends out of the outer shell (1); the inner core (2) is provided with a second blank hole (201), a tapered hole (202) and a blank stripping hole (203) which are connected in sequence from top to bottom; the top surface of the inner core (2) and the outer shell are connected. (1) A spring ring (4) is placed between the blank and the spring ring (4); a support ring (3) is sleeved on the outer wall of the spring ring (4); the outer diameter of the support ring (3) is adapted to the aperture of the sleeve hole (104), and is used to support and limit the spring ring (4); the aperture of the first blank hole (101), the aperture of the inner hole of the spring ring (4) and the aperture of the second blank hole (201) are consistent, and a blank hole is formed therebetween, which is used to form the blank of the blank; the tapered hole (202) is used to form the tapered portion of the blank.

2. A die for forging a cylindrical part blank with a tapered slope according to claim 1, characterized in that: The outer diameter of the inner core (2) is adapted to the diameter of the sleeve hole (104).

3. A die for forging a cylindrical part blank with a tapered slope according to claim 1, characterized in that: The top surface of the inner core (2) is an arc surface that descends toward the outside.

4. A die for forging a cylindrical part blank with a tapered slope according to claim 1, characterized in that: The left and right side walls of the housing (1) both have a housing section surface (102) that cuts downwards; a mounting platform (103) is formed between the housing section surface (102) and the side wall of the housing (1).

5. A die for forging a cylindrical part blank with a tapered slope according to claim 1, characterized in that: The side wall of the inner core (2) has at least one inner core section surface (204); an air flow channel is formed between the inner core section surface (204) and the hole wall of the sleeve hole (104) for balancing the air pressure inside and outside the die.

6. A die for forging a cylindrical part blank with a tapered slope according to any one of claims 1 to 5, characterized in that: The support ring (3) is made of polyurethane material.

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