Cold heading drawing die assembly

Abstract

The utility model discloses a cold heading drawing die assembly, which comprises a die sleeve, a cold heading drawing die assembly and a cold heading drawing die assembly, the die sleeve is of a cylinder structure, one end of the die sleeve is fixedly connected with a die sleeve pressed pipe, the inner side of the other end of the die sleeve is slidably connected with a die core with a hole, and a blank to be processed is arranged in an inner hole of the die core; the pressure spring is positioned on the inner side of the die sleeve and is positioned between the die sleeve pressed pipe and the die core; the stretching punching rod is located on the inner side of the die sleeve and fixedly connected with the die sleeve pressed pipe, and one end of the stretching punching rod extends into the die core hole and is used for blank punching. The stretching punching rod is sleeved with the material pushing pipe, one end of the material pushing pipe is driven by the material pushing mechanism, the other end of the material pushing pipe stretches into the die core hole and ejects out a blank, and the deep hole machining device is simple in structure, convenient to machine deep hole workpieces, high in universality and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of hole drawing part forming, in particular to a cold heading and stretching die assembly. Background Art

[0002] Cold forging refers to a forging method that uses a die to forge metal bars at room temperature. Currently, commonly used dies can only make solid parts or hollow parts of a certain size. The hole size of the hollow part is affected by the travel of the push tube. The deep hole punching of the product requires multiple staged punching to form, which not only reduces efficiency, but also cannot guarantee the quality of the product forming hole.

[0003] Therefore, how to provide a cold heading and stretching die assembly for drawing deep holes is a problem that those skilled in the art need to solve urgently. Utility Model Content

[0004] In view of this, the utility model provides a cold heading drawing die assembly, which is convenient for drawing hole parts, and the size of the part drawing hole can be adjusted according to needs.

[0005] In order to achieve the above object, the utility model adopts the following technical solution: a cold heading and stretching die assembly, which includes:

[0006] The die sleeve is a cylindrical structure, one end of the die sleeve is fixedly connected to a die sleeve pressure tube, and the other end is slidably connected to a die core with a hole, and the inner hole of the die core contains a blank to be processed;

[0007] A compression spring, the compression spring is located inside the mold sleeve and between the mold sleeve pressure tube and the mold core;

[0008] A stretching punch, the stretching punch is located inside the die sleeve and fixedly connected to the die sleeve pressure tube, one end of the stretching punch extends into the die core hole and is used for punching the blank;

[0009] A push tube is sleeved on the outside of the stretching punch, one end of the push tube is driven by the push mechanism, and the other end of the push tube extends into the core hole of the mold and pushes out the blank.

[0010] The utility model has the beneficial effects of using a stretching punch to punch holes in the blank, and a separately designed stretching punch can process deep-hole parts, and the subsequent use of a push tube facilitates material removal. The designed compression spring is used to support and reset the die core, and the die core moves downward under the action of the die. The die punches a certain distance, and the blank is formed into a workpiece with a hole under the joint action of the die and the stretching punch.

[0011] Preferably, the other end of the stretching punch is fixedly connected to a fixing seat, and the fixing seat is fixedly connected inside the pressure tube of the mold sleeve.

[0012] The resulting technical effect is: the positioning of the stretching punch is achieved by utilizing the fixed seat, thereby completing the punching process of the blank.

[0013] Preferably, a step is provided on the inner hole wall of the mold sleeve pressure tube near one end of the compression spring, one end of the fixing seat abuts against the step for limiting position, the other end of the fixing seat abuts against a positioning sleeve, and the positioning sleeve is fixedly connected to the mold sleeve pressure tube.

[0014] The resulting technical effect is that the relative position of the fixing seat is fixed by utilizing the step and the positioning sleeve.

[0015] Preferably, the fixing seat is a split structure, and the fixing seat includes a base plate and a pressure cover, the base plate is positioned on the step, the pressure cover is provided with a stepped slot hole, the other end of the stretching punch is provided with a limiting block, the limiting block is located in the stepped slot hole, and the positioning sleeve abuts against the pressure cover.

[0016] The resulting technical effect is that the fixed seat is a split structure, which is convenient for replacing stretching punches of different specifications.

[0017] Preferably, the fixing seat is provided with a through hole, the center line of the through hole is parallel to the axis of the stretching punch, and a pushing mechanism is slidably connected in the through hole.

[0018] The resulting technical effect is that perforation is the basis for the working of the pushing mechanism, and the pushing effect of the pushing tube is achieved under the guidance of the perforation.

[0019] Preferably, the pushing mechanism includes a pushing tube pad, a pushing needle, a push rod and a pressure source, the pushing tube pad is slidably connected to the outer wall of the stretching punch, the pushing tube pad is fixedly connected to one end of the pushing tube, the pushing needle is slidably connected in the through hole and one end of the pushing tube pad is connected to the pushing tube pad, and the other end is connected to the push rod, the push rod is slidably located in the pressure tube of the mold sleeve, and the push rod is connected to an external pressure source and provides pushing pressure.

[0020] The technical effect produced thereby is: the force is transmitted to the push tube pad by the push pin, thereby completing the movement of the push tube. The push pin is provided with a counter-pushing force by the push rod and the external pressure source.

[0021] Preferably, the end of the stretching punch close to the blank is a stepped structure, and the outer diameter of the stretching punch is smaller than the aperture of the mold core hole.

[0022] The resulting technical effect is that the stepped structure facilitates the punching of the blank by the stretching punch. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a structure of a cold heading stretching die assembly Figure 1 :

[0024] Figure 2 The utility model is a structure of a cold heading stretching die assembly Figure 2 ;

[0025] Figure 3 This is an application diagram of a cold heading and stretching die assembly of the utility model.

[0026] 1 die sleeve, 2 die sleeve pressure tube, 3 die core, 4 blank, 5 compression spring, 6 stretching punch, 7 push tube, 8 fixed seat, 81 bottom plate, 82 pressure cover, 9 step, 10 positioning sleeve, 11 push tube pad, 12 push needle, 13 ejector rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See the attached Figures 1 to 3 According to an embodiment of the utility model, a cold heading drawing die assembly comprises:

[0029] The die sleeve 1 is a cylindrical structure, one end of the die sleeve 1 is fixedly connected to the die sleeve pressure tube 2, and the other end is slidably connected to the inner side of the die core with a hole, and the inner hole of the die core 3 contains a blank 4 to be punched;

[0030] The compression spring 5 is located inside the mold sleeve 1 and between the mold sleeve pressure tube 2 and the mold core 3. The function of the compression spring 5 is to provide support force for the mold core, ensure sufficient stretching space, and facilitate the subsequent withdrawal and reset of the mold core;

[0031] A stretching punch 6 is located inside the die sleeve 1 and is fixedly connected to the die sleeve pressure tube 2. One end of the stretching punch 6 extends into the die core hole and is used for punching the blank. The stretching punch can realize deep hole processing.

[0032] The push tube 7 is sleeved on the outside of the stretching punch 6. One end of the push tube 7 is driven by the push mechanism, and the other end of the push tube 7 extends into the core hole of the mold and pushes out the blank. The function of the push tube is to push the blank out after the punching is completed, which is convenient for subsequent material removal.

[0033] In other embodiments, the other end of the stretching punch 6 is removably connected to a fixing seat 8, which is fixedly connected to the pressure tube 2 of the mold sleeve. The fixing seat is the basis for fixing the stretching punch, and it is necessary to ensure that the installation direction of the stretching punch is parallel to the inner hole of the mold core.

[0034] In other specific embodiments, a step 9 is provided on the inner hole wall of the mold sleeve pressure tube 2 near one end of the compression spring 5, one end of the fixed seat 8 abuts against the step for limiting position, and the other end of the fixed seat 8 abuts against a positioning sleeve 10, and the positioning sleeve 10 is fixedly connected to the mold sleeve pressure tube 2. Specifically, the positioning sleeve can be threadedly connected in the mold sleeve pressure tube, and there is a corresponding threaded hole in the mold sleeve pressure tube.

[0035] In some other embodiments, the fixing seat 8 is a split structure, and the fixing seat 8 includes a base plate 81 and a pressure cover 82. The base plate 81 is positioned on the step 9, and the pressure cover 82 is provided with a stepped groove hole. The other end of the stretching punch 6 is provided with a limiting block, and the limiting block is located in the stepped groove hole. The positioning sleeve 10 abuts against the pressure cover 82. The split fixing seat facilitates the replacement of the stretching punch, and stretching punches of different specifications can be used to meet different product needs.

[0036] In some other specific embodiments, the bottom plate 81 and the pressure cover 82 are coaxially provided with a through hole, the center line of the through hole is parallel to the axis of the stretching punch 6, and a pushing mechanism is slidably connected in the through hole.

[0037] In other embodiments, the pushing mechanism includes a pushing tube pad 11, a pushing needle 12, a push rod 13 and a pressure source. The pushing tube pad 11 is slidably connected to the outer wall of the stretching punch 6, and the pushing tube pad 11 is fixedly connected to one end of the pushing tube 7. The pushing needle 12 is slidably connected in the through hole and one end of it is connected to the pushing tube pad 11, and the other end is connected to the push rod 13. The push rod 13 is slidably located in the mold sleeve pressure tube 2, and the push rod 13 is connected to the external pressure source and provides pushing pressure.

[0038] In some other embodiments, the end of the stretching punch 6 close to the blank is a stepped structure, and the outer diameter of the main body of the stretching punch 6 is smaller than the diameter of the core hole.

[0039] Working principle:

[0040] The die is pressed downward, giving downward pressure to the blank. Due to the limitation of the stretching punch, the blank is punched, and the die core can move downward for a distance. After being pressed to a certain position, the punching process is completed. Under the action of the compression spring, the die core can be reset, and then the push tube is pushed upward through the pushing mechanism, and the push rod 13 drives the push needle 12 to move. The push needle 12 prompts the push tube to move upward along the stretching punch through the push tube pad 11 until the blank is ejected, completing the processing process.

[0041] As for the device and the method of use disclosed in the embodiment, since they correspond to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cold heading and stretching die assembly, characterized in that: include: A die sleeve (1), the die sleeve (1) being a cylindrical structure, one end of the die sleeve (1) being fixedly connected to a die sleeve pressure tube (2), the other end of the die sleeve (1) being slidably connected to a die core with a hole, the inner hole of the die core (3) containing a blank (4) to be processed; A compression spring (5), the compression spring (5) being located on the inner side of the mold sleeve (1) and between the mold sleeve pressure tube (2) and the mold core (3); A stretching punch (6), the stretching punch (6) being located inside the die sleeve (1) and fixedly connected to the die sleeve pressure tube (2), one end of the stretching punch (6) extending into the die core hole and being used for punching holes in the blank; A push tube (7) is sleeved on the outside of the stretching punch (6), one end of the push tube (7) is driven by a push mechanism, and the other end of the push tube (7) extends into the core hole of the mold and pushes out the blank.

2. A cold heading drawing die assembly according to claim 1, characterized in that: The other end of the stretching punch (6) is detachably connected to a fixing seat (8), and the fixing seat (8) is fixedly connected inside the die sleeve pressure tube (2).

3. A cold heading drawing die assembly according to claim 2, characterized in that: A step (9) is provided on the inner hole wall of the mold sleeve pressure tube (2) near one end of the compression spring (5), one end of the fixing seat (8) abuts against the step for limiting position, and the other end of the fixing seat (8) abuts against a positioning sleeve (10), and the positioning sleeve (10) is fixedly connected to the mold sleeve pressure tube (2).

4. A cold heading and stretching die assembly according to claim 3, characterized in that: The fixing seat (8) is a split structure, and the fixing seat (8) includes a base plate (81) and a pressure cover (82), the base plate (81) is positioned on the step (9), the pressure cover (82) is provided with a stepped slot, the other end of the stretching punch (6) is provided with a limit block, the limit block is located in the stepped slot, and the positioning sleeve (10) is in contact with the pressure cover (82).

5. A cold heading drawing die assembly according to claim 4, characterized in that: The bottom plate (81) and the pressure cover (82) are coaxially provided with a through hole, the center line of the through hole is parallel to the axis of the stretching punch (6), and a material pushing mechanism is slidably connected in the through hole.

6. A cold heading drawing die assembly according to claim 5, characterized in that: The pushing mechanism comprises a pushing tube pad (11), a pushing needle (12), a push rod (13) and a pressure source. The pushing tube pad (11) is slidably connected to the outer wall of the stretching punch (6). The pushing tube pad (11) is fixedly connected to one end of the pushing tube (7). The pushing needle (12) is slidably connected in the through hole and one end of the pushing tube pad (11) is connected to the pushing tube pad (11), and the other end is connected to the push rod (13). The push rod (13) is slidably located in the mold sleeve pressure tube (2). The push rod (13) is connected to an external pressure source and provides pushing pressure.

7. A cold heading drawing die assembly according to claim 1, characterized in that: One end of the stretching punch (6) close to the blank is a stepped structure, and the outer diameter of the stretching punch (6) is smaller than the diameter of the core hole.

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