Cold heading forming device for automotive hollow bush step double-straight-line structure

Abstract

The utility model discloses a cold heading forming device for a vehicle hollow bushing step double-straight-line structure, which comprises a lower supporting tool, a first supporting pad is arranged at the lower end of a first die cavity of the lower supporting tool, a second supporting pad is arranged on the first supporting pad, a through rod is mounted on the second supporting pad, and a second through rod is mounted on the through rod. The through rod extends out of the upper end of the second supporting pad, penetrates through an inner cavity of the push pipe and then makes contact with the lower end of the to-be-machined workpiece. An elastic piece is arranged on the periphery of the push pipe; an ejector rod penetrates through the first supporting pad and the second supporting pad and then makes contact with the bottom of the push pipe; a punching rod structure coaxial with the through rod is arranged in a second die cavity of the upper punching tool, a third supporting pad is arranged at the tail end of the punching rod structure, and the punching rod structure is hollow; the front end of the punching rod structure makes contact with the upper end of the workpiece to be machined, and the workpiece to be machined is fixed in the wedge-shaped supporting piece. The internal metal streamline of the product processed by the utility model is complete and high in strength.

Description

Technical Field

[0001] The utility model relates to the field of vehicle parts manufacturing, in particular to a cold heading forming device for a vehicle hollow bushing step double straight grain structure. Background Art

[0002] The vehicle hollow bushing step double straight structure targeted by the utility model has the following difficulties in processing:

[0003] 1. Multi-step structure: The more steps a part has, the more modules it requires, which greatly increases the difficulty of one-step molding and requires 5 molds for molding;

[0004] 2. Hole punching: Since the workpiece has many steps and a flange, it is more difficult to punch holes. The existing technology requires more than 5 molds to complete it.

[0005] 3. Straight lines: Since the parts have multiple steps and flange through holes, there are many uncertain factors in the direction of the straight lines. It takes many mold trials and improvement plans to produce better straight lines and make the strength of the parts reliable.

[0006] Cold heading one-step forming is a process for automotive parts and is widely used in various industries: after the parts are formed by cold heading one-step forming, the production efficiency and material utilization rate are maximized. However, due to the complexity of the parts, the utility model intends to use multiple mold trials and improved mold overlay schemes to enable the parts of the utility model to be formed by cold heading one-step forming, especially the one-step forming of straight lines, and the flow lines are smooth and feasible for mass production, and the production efficiency and material utilization rate are maximized. Utility Model Content

[0007] In order to overcome the above-mentioned defects of the prior art, the utility model aims to provide a cold heading forming device for a hollow bushing with a stepped double straight grain structure for a vehicle.

[0008] In order to achieve the purpose of this utility model, the technical solution adopted is:

[0009] A cold heading forming device for a hollow bushing with a stepped double straight grain structure for a vehicle, comprising:

[0010] A lower supporting tooling, wherein a first supporting pad is arranged at the lower end of the first mold cavity of the lower supporting tooling, a second supporting pad is arranged on the first supporting pad, a through rod is installed in the second supporting pad, the through rod extends out of the upper end of the second supporting pad and passes through the inner cavity of the push tube and then contacts the lower end of the workpiece to be processed;

[0011] An elastic member is arranged on the outer periphery of the push tube;

[0012] A push rod penetrates through the first support pad and the second support pad and contacts the bottom of the push tube;

[0013] An upper punching tool, wherein a punching rod structure coaxial with the through rod is arranged in the second die cavity of the upper punching tool, a third support pad is arranged at the end of the punching rod structure, and the punching rod structure is hollow;

[0014] The front end of the punch structure contacts the upper end of the workpiece to be processed, and the workpiece to be processed is fixed in the wedge-shaped support.

[0015] In a preferred embodiment of the present utility model, the push tube includes a bottom support and a push tube body arranged on the bottom support, and the push rod contacts the bottom support of the push tube after passing through the first support pad and the second support pad.

[0016] In a preferred embodiment of the present invention, the lower end of the wedge-shaped supporting member is in contact with the elastic member.

[0017] In a preferred embodiment of the present utility model, the front end of the punch structure extends into the supporting groove of the wedge-shaped supporting member.

[0018] In a preferred embodiment of the present invention, the elastic member is an axially sleeved spring.

[0019] The beneficial effects of the utility model are:

[0020] The product obtained by forming by the utility model has complete internal metal streamline and high strength, and two sections of straight lines are formed at one time without additional processing, which greatly improves the production efficiency of the product, simplifies the production process, and has good product interchangeability, and the product has no cold heading cracking phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 This is a diagram of the workpiece processing steps of the utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, in the following structure, the description of the well-known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] like Figure 1 The cold heading forming device for a stepped double straight-grain structure of a hollow bushing for a vehicle shown in the figure includes a lower supporting tool 100 for processing the lower outer end of a workpiece 300 to be processed, a first supporting pad 110 is arranged at the lower end of a first mold cavity 101 of the lower supporting tool 100, and a second supporting pad 120 is arranged on the first supporting pad 110.

[0026] A through rod 130 is installed on the second support pad 120 . The through rod 130 extends out of the upper end of the second support pad 120 , passes through the inner cavity of the push tube 140 , and contacts the lower end of the workpiece 300 to be processed.

[0027] The workpiece 300 to be processed is fixed in the wedge-shaped support member 400 , and the wedge-shaped support member 400 is disposed in the first mold cavity 101 of the lower supporting tool 100 .

[0028] An elastic member 150 is disposed on the outer circumference of the push tube 140 , and the lower end of the wedge-shaped support member 400 contacts the elastic member 150 .

[0029] The elastic member 150 may be an axially sleeved spring.

[0030] The push rod 160 passes through the first support pad 110 and the second support pad 120 and contacts the bottom of the push tube 140. Specifically, the push tube 140 includes a bottom support 141 and a push tube body 142 arranged on the bottom support 141. The push rod 160 passes through the first support pad 110 and the second support pad 120 and contacts the bottom support 141 of the push tube 140.

[0031] The ejector rod 160 drives the ejector tube 140 to eject the workpiece 300 to be processed according to the needs of the step.

[0032] An upper punching tool 200 is used to process the upper outer end and the inner end of the workpiece 300 to be processed.

[0033] A punch rod structure 210 coaxial with the through rod 130 is disposed in the second die cavity 201 of the upper punching tool 200. A third support pad 220 is disposed at the end of the punch rod structure 210. The punch rod structure 210 is hollow and is used to eject the workpiece 300 to be processed.

[0034] The front end of the punch structure 210 contacts the upper end of the workpiece 300 to be processed, and the front end of the punch structure 210 extends into the support groove 401 of the wedge-shaped support member 400 .

[0035] The workpiece 300 to be processed is processed by the lower supporting tool 100 and the upper punching tool 200 of the utility model, and the specific steps are step 1 (cutting), step 2 (chamfering), step 3 (strong beam + punching), step 4, punching + pre-forming, step 5 (flange pressing), step 6 (tooth forming), step 7 (waste passing), wherein steps 2-7 are all completed by the upper and lower punching of the device of the utility model.

[0036] By utilizing the utility model in combination with cold heading technology to complete all size processing, the obtained product has complete internal metal streamlines and high strength, and two sections of straight grains are formed at one time without the need for additional processing, which greatly improves the production efficiency of the product, simplifies the production process, and has good product interchangeability, and the product has no cold heading cracking phenomenon.

Claims

1. A cold heading forming device for a hollow bushing with a double straight grain structure for a vehicle, characterized in that: include: A lower supporting tool, wherein a first supporting pad is arranged at the lower end of the first mold cavity of the lower supporting tool, a second supporting pad is arranged on the first supporting pad, a through rod is installed on the second supporting pad, the through rod extends out of the upper end of the second supporting pad and passes through the inner cavity of the push tube and then contacts the lower end of the workpiece to be processed; An elastic member is arranged on the outer periphery of the push tube; A push rod penetrates through the first support pad and the second support pad and contacts the bottom of the push tube; An upper punching tool, wherein a punching rod structure coaxial with the through rod is arranged in the second die cavity of the upper punching tool, a third support pad is arranged at the end of the punching rod structure, and the punching rod structure is hollow; The front end of the punch structure contacts the upper end of the workpiece to be processed, and the workpiece to be processed is fixed in the wedge-shaped support.

2. A cold heading forming device for a hollow bushing with double straight grain structure for a vehicle as claimed in claim 1, characterized in that: The push tube comprises a bottom support and a push tube body arranged on the bottom support, and the push rod contacts the bottom support of the push tube after passing through the first support pad and the second support pad.

3. A cold heading forming device for a hollow bushing with double straight grain structure for a vehicle as claimed in claim 1, characterized in that: The lower end of the wedge-shaped supporting member contacts the elastic member.

4. A cold heading forming device for a hollow bushing with a stepped double straight grain structure for a vehicle as claimed in claim 1, characterized in that: The front end of the punch structure extends into the supporting groove of the wedge-shaped supporting member.

5. A cold heading forming device for a hollow bushing with a stepped double straight grain structure for a vehicle as claimed in claim 1, characterized in that: The elastic member is an axially sleeved spring.

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