Synchronous groove rolling device in cold heading process

Abstract

The utility model discloses a synchronous groove rolling device in the cold heading process, and belongs to the field of thread product machining equipment. The synchronous groove rolling device comprises a cold heading and stamping mechanism, wherein a core rod of the cold heading and stamping mechanism is sleeved with a raw material; a groove rolling mechanism is arranged in the circumferential direction of a raw material and comprises two groove rolling wheels which are symmetrically arranged, a driving shaft is arranged on the middle shaft portion of each groove rolling wheel and connected with a driving source, the driving source drives the groove rolling wheels to rotate, and rolling hook forming protrusions are arranged in the circumferential direction of the groove rolling wheels; the lining bar is located at one end of the raw material and abuts against the raw material, the lining bar supports one end of the raw material, the cold heading stamping mechanism conducts stamping from the other end of the raw material, and the groove rolling wheel conducts groove rolling on the raw material in the circumferential direction. Tail rolling groove machining equipment is additionally arranged in the cold heading forming process, the two machining procedures are reduced and combined, the production cost and workload are further reduced, the quality and reliability of screws are improved, and the requirements of customers for performance and quality are better met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the processing equipment field of threaded product especially relates to a cold heading process synchronous rolling groove device. BACKGROUND

[0002] Cold heading process is one of new metal pressure processing processes with little or no cutting. It is a processing method that uses plastic deformation of metal under external force and helps die to redistribute and transfer metal volume to form required parts or blanks. Cold heading process is most suitable for producing standard fasteners such as bolts, screws, nuts, rivets and pins.

[0003] In the processing of screws, some need to increase tail grooves. Therefore, a tail rolling groove station is added in the multi-station cold heading forming process. The previous process is to separately add a rolling groove process after the cold heading process on a thread rolling machine. However, this process has problems such as low processing efficiency, difficult size tolerance control, high proportion of defective products and high technical requirements for personnel. SUMMARY

[0004] To solve the above technical problems, the utility model provides a cold heading process synchronous rolling groove device.

[0005] The technical scheme of the utility model is: a cold heading process synchronous rolling groove device, comprising:

[0006] A cold heading stamping mechanism, a raw material is sleeved on the core rod of the cold heading stamping mechanism; a rolling groove mechanism is arranged on the circumference of the raw material, and the rolling groove mechanism comprises:

[0007] Two rolling groove wheels arranged symmetrically, a driving shaft is arranged on the central shaft part of the rolling groove wheel, the driving shaft is connected with a driving source, the driving source drives the rolling groove wheel to rotate, a rolling hook forming protrusion is arranged on the circumference of the rolling groove wheel; and

[0008] A spacer rod is located at one end of the raw material and abuts against the raw material, the spacer rod supports one end of the raw material, the cold heading stamping mechanism stamps from the other end of the raw material, and the rolling groove wheel rolls grooves on the circumference of the raw material.

[0009] Further, the circumference of the rolling groove wheel comprises from top to bottom:

[0010] A stable zone is arranged in contact with the circumference of the raw material;

[0011] A forming zone is arranged with a rolling groove forming protrusion;

[0012] A support zone is arranged with a spacer rod. Through the design of the rolling groove wheel, the smooth rolling of the groove is ensured.

[0013] Further, the thickness of the forming area is greater than the stabilizing area, and the thickness of the supporting area is greater than the forming area. Smooth forming is ensured.

[0014] Further, the upper end of the roll groove forming protrusion of the forming area is connected with the stabilizing area, and the lower end of the roll groove forming protrusion is connected with the supporting area through a transition slope. Smooth transition is ensured.

[0015] Further, the roll groove mechanism further comprises clamping support blocks, two of which are symmetrically arranged and located between the two roll groove wheels. The two clamping support blocks are fixedly arranged and function to protect the screw after the screw is pushed into the roll groove wheel, including effectively protecting the screw during the entire roll groove groove process, so that the roll groove groove is efficient and stable.

[0016] Further, the two roll groove wheels are respectively provided with a moving source along the radial direction of the raw material. The moving source can be realized by a cylinder, an electric cylinder, a linear module or the like.

[0017] Further, the cold heading and stamping mechanism comprises a die cushion block, the middle part of the die cushion block is hollow, and a die unit is arranged in the die cushion block. The die unit belongs to the prior art in the field, and thus will not be described in detail.

[0018] Further, the cushion rod is coaxially arranged with the raw material.

[0019] Further, the raw material is a screw blank, and the screw blank is hollow.

[0020] The beneficial technical effects of the utility model are as follows: by adding a tail roll groove machining device in the cold heading forming process, two machining processes are combined, production cost and workload are further reduced, the quality and reliability of the screw are improved, and the performance and quality requirements of customers are better met. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of a synchronous roll groove device.

[0022] Figure 2 is Figure 1 a sectional view.

[0023] Figure 3 is Figure 2 a local enlarged view of

[0024] Figure 4 is a clamping schematic view of a clamping support block.

[0025] Figure 5 is a whole schematic view of a synchronous roll groove device in a cold heading process.

[0026] in:

[0027] 1. Cold heading stamping mechanism,

[0028] 2. Core rod,

[0029] 3. Grooving wheel; 31. Stabilizing zone; 32. Forming zone; 33. Supporting zone; 34. Transition slope; 35. Grooving protrusion.

[0030] 4. Support rod,

[0031] 5. Clamp the support block.

[0032] 6. Screw blanks. Detailed Implementation

[0033] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0034] See appendix Figures 1-5 The cold heading process synchronous grooving device shown includes:

[0035] A cold heading stamping mechanism 1, wherein a raw material is sleeved on a mandrel 2 of the cold heading stamping mechanism 1; a grooving mechanism is provided in the circumferential direction of the raw material, the grooving mechanism comprising:

[0036] Two symmetrically arranged grooving rollers 3 are provided, with a drive shaft at the central axis of each grooving roller 3. The drive shaft is connected to a drive source, which drives the grooving roller 3 to rotate. A hook forming protrusion is provided on the circumference of each grooving roller 3. A pad rod 4 is located at one end of the raw material and abuts against the raw material. The pad rod 4 supports one end of the raw material. The cold heading stamping mechanism 1 stamps from the other end of the raw material, and the grooving rollers 3 groove the raw material circumferentially.

[0037] Furthermore, the circumferential direction of the grooved wheel 3, from top to bottom, includes:

[0038] A stabilization zone 31 is configured to make circumferential contact with the raw material;

[0039] Forming area 32, wherein a groove forming protrusion 35 is provided in the forming area 32;

[0040] A support area 33 is provided, within which a pad rod 4 is installed. The design of the grooving wheel 3 ensures smooth grooving.

[0041] Further, the thickness of the forming area 32 is greater than the stabilizing area 31, and the thickness of the supporting area 33 is greater than the forming area 32. The smoothness of the forming is ensured.

[0042] Further, the upper end of the roll groove forming protrusion 35 of the forming area 32 is connected with the stabilizing area 31, and the lower end of the roll groove forming protrusion 35 is connected with the supporting area 33 through the transition slope 34. The smoothness of the transition is ensured.

[0043] Further, the roll groove mechanism further comprises clamping supporting blocks 5, two of which are symmetrically arranged and located between the two roll groove wheels 3. This is a fixed arrangement, that is, the two clamping supporting blocks 5 are fixedly arranged, and the gap between them is provided with a screw blank 6.

[0044] Further, the two roll groove wheels 3 are respectively provided with a moving source along the radial direction of the raw material. The moving source can be a cylinder, an electric cylinder, a linear module, etc. for opening and facilitating the entry of the raw material, and then contacting the side wall of the raw material for roll groove forming. Of course, the moving source in this process can be a cylinder, an electric cylinder, a linear module, etc.

[0045] Further, the cold heading stamping mechanism 1 comprises a die cushion, the middle part of which is hollow, and a die unit is arranged inside. The die unit belongs to the prior art in the field, and will not be described in detail.

[0046] Further, the pad rod 4 is coaxially arranged with the raw material.

[0047] Further, the raw material is a screw blank 6, and the screw blank 6 is hollow.

[0048] By adding the tail roll groove processing equipment in the cold heading forming process, the two processing procedures are reduced and combined, the production cost and workload are further reduced, the quality and reliability of the screw are improved, and the performance and quality requirements of the customer are better met.

[0049] Figure 5 The die system pushes the screw blank 6 into the roll groove wheel 3, and the roll groove wheel 3 starts to work. The working process is that the screw blank 6 is pushed into the roll groove wheel 3, and at the same time, the two roll groove wheels 3 in the rotating state start to approach the screw blank 6. The pressure of the roll groove wheel 3 acting on the blank and the center distance between the two roll groove wheels 3 are set through the machine control interface, and the roll groove process is usually controlled within 0.2 seconds, so as to roll out the shape and size of the tail groove on the required screw blank 6.

[0050] The screw blank 6 rotates synchronously in the process of rolling the groove. In order to reduce the friction resistance between the sleeve and the flange surface of the screw blank 6, rolling bearings and fixed flanges are arranged between the sleeve and the die sleeve, so that the sleeve has a rotating function and rotates with the sleeve in the process of rolling the groove of the screw blank 6, and the friction resistance is effectively eliminated.

[0051] In addition, since the screw blank 6 is hollow, the wall thickness of the rolling groove part is only about 1.4 mm, and the rolling groove process is prone to deformation. In order to prevent deformation, the hole protection mandrel 2 is used to play a hole protection anti-deformation role. After the rolling groove action of the screw blank 6 is completed, the two rolling groove wheels 3 are expanded in the center distance under the program control of the machine, and gradually separate from the screw blank 6. At the same time, the die system moves backward. The processed workpiece is taken out or ejected. With the conveying belt sent out of the machine, the next cycle is started.

[0052] A reset spring can be arranged below the pad rod 4. When the screw blank 6 exists, the cold heading stamping mechanism 1 is compressed, the rolling groove is carried out, when the machining is completed, the cold heading stamping mechanism 1 is separated, under the action of the reset spring, the pad rod 4 ejects the screw blank 6. The part is separated quickly.

[0053] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model. It should be pointed out that for ordinary skilled persons in the technical field, on the premise of not departing from the technical principles of the utility model, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection range of the utility model.

Claims

1. A cold-die process in-line groove rolling apparatus characterized by, The utility model relates to a cold heading stamping mechanism (1), the core rod (2) of cold heading stamping mechanism (1) is sleeved with raw material; The raw material is provided with a rolling groove mechanism in the circumferential direction, and the rolling groove mechanism comprises: Two symmetrical rolling groove wheels (3) are provided, the middle shaft part of the rolling groove wheel (3) is provided with a driving shaft, the driving shaft is connected with a driving source, the driving source drives the rolling groove wheel (3) to rotate, and a rolling hook forming protrusion is arranged in the circumferential direction of the rolling groove wheel (3);And A pad rod (4) is arranged at one end of the raw material and abuts against the raw material, the pad rod (4) supports one end of the raw material, the cold heading stamping mechanism (1) stamps from the other end of the raw material, and the rolling groove wheel (3) rolls the groove in the circumferential direction of the raw material. The circumferential direction of the rolling groove wheel (3) comprises from top to bottom:

2. The cold-die process simultaneous roll-grooving apparatus of claim 1, wherein: A stable area (31) is arranged in contact with the circumferential direction of the raw material; A forming area (32) is provided with a rolling groove forming protrusion (35); A supporting area (33) is provided with a pad rod (4). The thickness of the forming area (32) is greater than that of the stable area (31), and the thickness of the supporting area (33) is greater than that of the forming area (32).

3. The cold-die process simultaneous roll-grooving apparatus of claim 2, wherein: The upper end of the rolling groove forming protrusion (35) of the forming area (32) is connected with the stable area (31), and the lower end of the rolling groove forming protrusion (35) is connected with the supporting area (33) through a transition inclined surface (34).

4. The cold-die process simultaneous roll-grooving apparatus of claim 2, wherein: The rolling groove mechanism further comprises clamping support blocks (5), the clamping support blocks (5) are symmetrically arranged in two, and are respectively arranged between the two rolling groove wheels (3).

5. The cold-die process simultaneous roll-grooving apparatus of claim 1 wherein: The two rolling groove wheels (3) are respectively provided with a moving source along the radial direction of the raw material.

6. The cold-die process simultaneous roll-grooving apparatus of claim 1, wherein: The pad rod (4) is coaxially arranged with the raw material.

7. The cold-die process simultaneous roll-grooving apparatus of claim 1 wherein: The raw material is a screw blank (6), and the screw blank (6) is hollow.

8. The cold-die process simultaneous roll-grooving apparatus of claim 1 wherein: ​

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