Tool for forming special-shaped free forge piece

Abstract

The forming tool comprises an outer die sleeve, an upper die and a lower die, the outer die sleeve is provided with an outer die cavity penetrating up and down, blank grooves are symmetrically formed in the two opposite side walls of the outer die sleeve, the tops of the blank grooves are open, and the upper die and the lower die are connected through the upper die and the lower die. The bottom of the upper die and the top of the lower die are matched to form two forming cavities, the two forming cavities are symmetrically arranged, each forming cavity is matched with the special-shaped outline of the end of a target forge piece, and the upper die and the lower die are placed in an outer die cavity of the outer die sleeve in a matched mode. The forming die is used for forming the special-shaped size of the end part, ensures that the streamline of the forge piece is not cut off, and solves a series of problems of complicated forming, low percent of pass, multiple heating numbers, poor consistency of the shape and the size of the product and the like of the free forge piece with the special-shaped end part.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of forgings, especially relates to a forming tool for special-shaped free forging. BACKGROUND

[0002] Free forging is a metal forging obtained through free forging process, which uses impact force or pressure to make metal blank in free state through deformation to obtain required shape and size. In free forging, metal blank is deformed through hammering or pressure in free state, and impurities and grains in the metal are rearranged along the deformation direction to form flow lines. If metal flow is uneven or there is local overheating or overcooling during forging, it may lead to unreasonable flow line distribution, and even flow line exposure. Especially for such products as shown in the drawings, the end part is of special-shaped structure, and free forging process is required during manufacturing, and flow line exposure of forgings is not allowed, which increases the manufacturing difficulty. Figure 1 Because of the complex shape of the product, the forming and flow line control are particularly tricky.

[0003] At present, the manufacturing of such forgings usually relies on the use of a clamp tool to realize forming. However, since the clamp tool has a large degree of freedom, it requires high skills of the operator. In addition, due to the irregularity of the product shape, especially the serious misalignment of the head part. Moreover, in order to meet the requirement of machining allowance, it is often necessary to increase the use of raw materials. This not only leads to the local size of the forgings exceeding the specification, but also requires multiple heating (usually 4 to 5 times), thereby reducing the qualification rate of the product and seriously affecting the consistency of the product shape and size. UTILITY MODEL CONTENTS

[0004] In order to overcome the above-mentioned defects, the utility model provides a forming tool for special-shaped free forgings, which is used for forming the special-shaped size of the end part, ensuring that the flow lines of the forgings are not cut off, and solving a series of problems such as complex forming, low qualification rate, multiple heating, and poor consistency of product shape and size of such end part special-shaped free forgings.

[0005] The main technical scheme adopted in the utility model is as follows:

[0006] A forming tool for special-shaped free forgings, comprising an outer die sleeve, an upper die and a lower die, wherein the outer die sleeve has an outer die cavity penetrating through the upper and lower sides, symmetrical blank grooves are arranged on the opposite side walls of the outer die sleeve, and the top of the blank grooves is open, the bottom of the upper die and the top of the lower die cooperate to form two forming cavities, and the two forming cavities are arranged symmetrically with each other, each forming cavity is matched with the end part special-shaped contour of the target forging, and the upper die and the lower die are matched and placed in the outer die cavity of the outer die sleeve.

[0007] Preferably, it further comprises a pad, which is placed on the top of the upper die.

[0008] Preferably, the two forming cavities formed by the cooperation between the upper die and the lower die are transitionally connected to form transition protrusions on the upper die and the lower die respectively.

[0009] Preferably, the transition protrusions of the upper die and the lower die are provided with V-shaped grooves at the middle positions along the width direction of the blank.

[0010] Preferably, the upper die is provided with a handle on one side, the outer die sleeve is provided with an opening groove, and the position of the opening groove corresponds to the position of the handle.

[0011] Preferably, the outer die cavity is a square cavity through up and down.

[0012] Beneficial effects: the forming tool for special-shaped free forgings has the following advantages:

[0013] (1) In the utility model, the upper die can be guided by the outer die sleeve, which is beneficial to prevent the problem of misalignment during end forming, improves the qualified rate of products, and ensures good consistency of products.

[0014] (2) In the utility model, the upper die and the lower die can be matched to simultaneously form two special-shaped ends of the blank, which not only meets the requirements of product shape and size and forging streamline, but also reduces the forging allowance, machining time, improves the material utilization rate and processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the forming tool of embodiment 1;

[0016] Figure 2 It is a vertical section schematic view of the forming tool of embodiment 1;

[0017] Figure 3 It is a structure schematic view of the outer die sleeve of embodiment 1;

[0018] Figure 4 It is a schematic view of the cooperation of the upper die and the lower die of embodiment 1;

[0019] Figure 5 It is a schematic view of the target forging of embodiment 1;

[0020] Figure 6 It is a schematic view of step S2 of embodiment 1;

[0021] Figure 7 It is a schematic view of step S3 of embodiment 1;

[0022] Figure 8 It is a schematic view of step S4 of embodiment 1;

[0023] Figure 9 A schematic diagram for step S5 of Example 1;

[0024] In the figure: outer die sleeve 1, outer die cavity 1-1, blank groove 1-2, opening groove 1-3, upper die 2, handle 2-1, lower die 3, forming cavity 4, target forging 5, cushion block 6, transition protrusion 7, V-shaped groove 7-1, blank 8. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application. Example 1

[0026] A forming tool for special-shaped free forgings, comprising an outer die sleeve 1, an upper die 2, a lower die 3 and a cushion block 6, wherein the outer die sleeve 1 has an upper and lower through outer die cavity 1-1, and the outer die sleeve 1 has a blank groove 1-2 symmetrically arranged on the opposite two side walls, and the blank groove 1-2 is open at the top, and the blank is placed in the outer die sleeve 1 through the blank groove 1-2, the bottom of the upper die 2 cooperates with the top of the lower die 3 to form two forming cavities 4 for forming special-shaped ends, and the two forming cavities 4 are symmetrically arranged with each other, and each forming cavity 4 matches the special-shaped contour of the end of the target forging 5, and the upper die 2 and the lower die 3 are cooperatively placed in the outer die cavity 1-1 of the outer die sleeve 1.

[0027] When small-sized parts need to be processed, the conventional press head is larger than the outer die cavity 1-1 of the outer die sleeve 1, which limits the downward movement stroke of the upper die 2. Therefore, the cushion block 6 is further arranged in the top of the upper die 2 in the present embodiment 1 to increase the upper die stroke.

[0028] The thickness of the cushion block can be adjusted according to actual needs by those skilled in the art, so as to adjust the upper die stroke.

[0029] In the present embodiment 1, the outer die cavity 1-1 is an upper and lower through square cavity, and the outer peripheral contour of the upper die 2 and the lower die 3 matches the square cavity of the outer die cavity 1-1.

[0030] In this embodiment 1, the two forming cavities 4 formed by the upper die 2 and the lower die 3 are connected by transitions to form transition protrusions 7 on the upper die 2 and the lower die 3, respectively. The transition protrusions 7 of the upper die 2 and the lower die 3 are provided with V-shaped grooves 7-1 at the middle positions along the width direction of the blank, which facilitates the flow of metal in the length direction of the blank and improves the forming effect. In the present utility model, the angle of the V-shaped groove 7-1 is set by those skilled in the art according to actual needs and is generally 90°-120°.

[0031] In this embodiment 1, in order to facilitate the placement and removal of the upper mold 2, a handle 2-1 is provided on the side of the upper mold 2, and an open groove 1-3 (top opening) is also provided on the outer mold sleeve 1, and the position of the open groove corresponds to the position of the handle, which is used to achieve avoidance through the handle 2-1.

[0032] Processing Figure 5 Taking the target forging shown as an example, the product requires a free forging process and no streamlines are allowed to be exposed. The specific steps for processing using the forming tool of this embodiment 1 are as follows:

[0033] S1: Free forging, processing the blank 8 into a suitable size;

[0034] S2: As Figure 6 As shown, the lower mold 3 is placed in the outer mold sleeve 1;

[0035] S3: Figure 7 As shown, the blank 8 processed in step S1 is passed through the blank slot 1-2 and placed into the outer mold sleeve 1, and the position of the blank 8 is adjusted to ensure that it is evenly and horizontally placed on the left and right sides (usually with the assistance of a technician);

[0036] S4: Figure 8 As shown, the upper mold 2 is placed in the outer mold sleeve 1, and the cushion block 6 is placed above the upper mold 2;

[0037] S5: Figure 9 As shown, the upper die is pressed down to form the special-shaped end of the forging, and then cut from the middle to obtain two special-shaped end forgings, which are then subjected to subsequent forming processes such as drawing and so on, to obtain Figure 5 The target forging 5 is shown.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A tool for forming special-shaped free forgings, characterized in that: It includes an outer die sleeve, an upper die and a lower die, wherein the outer die sleeve has an outer die cavity that passes through from top to bottom, and blank grooves are symmetrically arranged on the two opposite side walls of the outer die sleeve, and the top of the blank grooves is open, the bottom of the upper die and the top of the lower die cooperate to form two forming cavities, and the two forming cavities are symmetrically arranged, each of the forming cavities matches the end special-shaped contour of the target forging, and the upper die and the lower die are placed in the outer die cavity of the outer die sleeve.

2. The tooling for forming special-shaped free forgings according to claim 1, characterized in that: Also included is a spacer block placed on top of the upper mold.

3. The tooling for forming special-shaped free forgings according to claim 1, characterized in that: The two forming cavities formed by the upper die and the lower die are connected through transition to form transition protrusions on the upper die and the lower die respectively.

4. The tooling for forming special-shaped free forgings according to claim 3, characterized in that: A V-shaped groove is provided at the middle position of the transition protrusions of the upper die and the lower die along the width direction of the blank.

5. The tool for forming special-shaped free forgings according to claim 3, characterized in that: A handle is provided on one side of the upper mold, and an open groove is provided on the outer mold sleeve, and the position of the open groove corresponds to the position of the handle.

6. The tooling for forming special-shaped free forgings according to claim 5, characterized in that: The outer mold cavity is a square cavity that penetrates from top to bottom.

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