A method for upsetting a screw plate

Abstract

The present application relates to the field of machining, and discloses a kind of upsetting processing method of support plate screw, intercepts rod-shaped metal as blank, blank length is 2.5-3 times of support plate screw length, blank diameter is 1.3-1.5 times of support plate screw nominal diameter;Blank is heated and then put into hot upsetting die and is formed by hot upsetting, and circular slab blank is formed in the middle, one side of slab blank is rod blank, and the other side is excess material rod;Excess material rod is cut off by turning and slab blank end face is turned, and after being clamped again, rod blank outer circle, chamfer and slab blank other side end face are turned;Blank is put into punching die, and slab blank is formed by punching processing to form support plate;Blank is put into thread rolling machine, and thread is formed by thread rolling processing rod blank.The present application can solve the problem of low production efficiency and low material utilization rate in the existing support plate screw production and processing technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mechanical processing, in particular to a kind of upsetting processing method of support plate screw. BACKGROUND

[0002] The head of conventional screw is hexagonal head, round head or flat head, and support plate screw is a kind of screw with plate-shaped head, which is usually composed of support plate 1, stem 2 and thread 3, as shown in Fig. Figure 1 As shown in Fig. Figure 2 The conventional processing method of support plate screw is to select bar stock with diameter larger than the outer diameter of support plate, to obtain stem and head by mechanical cutting processing, and then to form support plate by punching processing on the head, and to form thread by thread rolling or thread rolling processing on the stem. Such processing method needs to select bar stock with larger diameter, and more material is removed from bar stock during cutting processing, so the material utilization rate is low. In addition, the cutting process needs to consider the feed amount, and the cutting process consumes more time. In summary, the existing support plate screw production and processing technology has low production efficiency and low material utilization rate. SUMMARY

[0003] The present application aims to provide an upsetting processing method of support plate screw to solve the problems of low production efficiency and low material utilization rate of the existing support plate screw production and processing technology.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an upsetting processing method of support plate screw, comprising the following steps:

[0005] A, blanking, cutting off the rod-shaped metal as blank, the length of blank is 2.5-3 times the length of support plate screw, and the diameter of blank is 1.3-1.5 times the nominal diameter of support plate screw;

[0006] B, hot upsetting, after heating the blank, put it into hot upsetting die to form a round plate blank, one side of the plate blank is stem blank, and the other side is excess rod;

[0007] C, turning processing, turning processing to remove excess rod and turning plate blank end face, re-clamping to turn stem blank outer circle, chamfer and plate blank other side end face;

[0008] D, punching processing, put the blank into punching die to punch the plate blank to form support plate;

[0009] E, thread rolling, put the blank into thread rolling machine to thread roll the stem blank to form thread.

[0010] Preferably, as an improvement, the plate blank unilateral processing allowance in step B is greater than 2mm, and the stem blank radial processing allowance is greater than 2mm.

[0011] Preferably, as an improvement, the plate blank is punched into a rhombic supporting plate in step D, and a circular arc transition edge is punched at the four corners of the supporting plate, and two through holes are formed on the long axis of the supporting plate on both sides of the rod part.

[0012] Preferably, as an improvement, the single piece working time is controlled to be less than or equal to 0.65 min / piece in step B.

[0013] Preferably, as an improvement, the single piece working time is controlled to be less than or equal to 5 min / piece in step C.

[0014] In the blanking stage of the scheme, a rod material with a diameter close to the diameter of the rod part of the supporting plate screw is selected, the length is cut according to a specific ratio, and then the blank with the plate blank is formed through hot upsetting and mold cooperation, which is a near net forming mode. The blank after hot upsetting is processed by a numerical control lathe to process the end face and the outer circle, and then punched and rolled into a supporting plate screw. The conventional machining mode adopts a rod-shaped raw material with a diameter greater than the outer shape of the supporting plate and needs to reserve a punching allowance. The radial size difference between the supporting plate and the rod part is large, resulting in a large amount of processing required for forming the rod part, long processing time and large material waste. The scheme adopts the hot upsetting mode to upset the thin rod material to form a plate blank, and the rod blank can be formed by a small variable. Thus, the forming process of the rod blank and the plate blank only needs to be formed by upsetting once on the hot upsetting machine, which is time-saving and efficient. After numerical control machining, only a small amount of machining allowance on the plate blank and the rod blank needs to be machined to the formed size, which is less material waste. The working time of hot upsetting and numerical control machining can be controlled. Taking M6x20 supporting plate screw as an example, the conventional machining forming mode needs 15.45 min / piece, the single piece uses φ30x26, the single piece weight is 146 grams, and the material utilization rate is 4.7%. The machining of the scheme only needs 5.88 min / piece, the single piece uses φ8.5x58, the single piece weight is 26 grams, and the material utilization rate is 26.6%. It can be seen that the production efficiency can be increased by about 2.6 times, the material utilization rate can be increased by about 5 times, the production capacity can be significantly improved in mass production, the material utilization rate can be improved, and the production cost can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the supporting plate screw of the present application.

[0016] Figure 2 It is a process schematic diagram of the prior art machining supporting plate screw.

[0017] Figure 3 It is a blank structure schematic diagram of the hot upsetting process in the embodiment of the present application.

[0018] Figure 4 It is a process schematic diagram of numerical control machining in the embodiment of the present application. DETAILED DESCRIPTION

[0019] The specific embodiments are further described in detail below:

[0020] The reference signs in the attached drawings of the specification include: a pallet 1, a rod part 2, a thread 3, a plate blank 4, a rod blank 5, a surplus rod 6.

[0021] Embodiment: a method for upsetting processing of a pallet screw, comprising the following steps:

[0022] A, blanking, cutting a rod-shaped metal into a blank, the length of the blank is 2.5-3 times the length of the pallet screw, and the diameter of the blank is 1.3-1.5 times the nominal diameter of the pallet screw;

[0023] B, hot upsetting, as shown in Figure 3 , after heating the blank, put it into the hot upsetting die for hot upsetting forming, a circular plate blank 4 is formed in the middle, one side of the plate blank 4 is a rod blank 5, and the other side is a surplus rod 6, the single-sided machining allowance of the plate blank 4 is greater than 2mm, the radial machining allowance of the rod blank 5 is greater than 2mm, and the single-piece working time is controlled to be less than or equal to 0.65min / piece;

[0024] C, numerical control machining, as shown in Figure 4 , the surplus rod 6 is cut off and the end face of the plate blank 4 is machined, after re-clamping, the outer circle, chamfer and the other side end face of the plate blank 4 are machined, and the single-piece working time is controlled to be less than or equal to 5min / piece;

[0025] D, punching processing, put the blank into the punching die, punch the plate blank 4, punch the plate blank 4 into a rhombus-shaped pallet 1, punch a circular arc transition edge at the four corners of the pallet 1, and at the same time, form two through holes on the long axis of the pallet 1 on both sides of the rod part 2;

[0026] E, thread rolling, put the blank into the thread rolling machine to roll the thread 3 on the rod part 2.

[0027] The specific implementation process is as follows: in the blanking stage, a rod material with a diameter close to the diameter of the screw rod part 2 of the support plate 1 is selected, the length is cut according to a specific ratio, and then the blank with the slab 4 is formed by cooperating with the die through hot upsetting, which is a near net forming mode. The blank after hot upsetting is machined on the end face and the outer circle by the numerical control lathe, and then punched, rolled and formed into the support plate 1 screw. The conventional machining mode adopts a rod-shaped raw material with a diameter greater than the outer shape of the support plate 1, and a punching allowance is reserved. The radial dimension between the support plate 1 and the rod part 2 is relatively large, resulting in a large amount of processing required for forming the rod part 2, which causes long processing time and large material waste. The present scheme adopts the hot upsetting mode to upset the relatively thin rod material to form the slab 4, and the rod material can be formed into the rod blank 5 by a smaller variable forming. In this way, the forming process of the rod blank 5 and the slab 4 only needs to be upset once on the hot upsetting machine, which is time-saving and efficient. After numerical control machining, only a small amount of machining allowance on the slab 4 and the rod blank 5 needs to be machined to the formed size, which is less wasteful of materials. The working hours of hot upsetting and numerical control machining can be controlled. Taking the M6×20 support plate 1 screw as an example, the conventional machining forming mode requires 15.45 min / piece of processing time, φ30×26 of raw material is used for single piece, the single piece weight is 146 grams, and the material utilization rate is 4.7%. By using the present scheme, the processing time of single piece is only 5.88 min / piece, φ8.5×58 of raw material is used for single piece, the single piece weight is 26 grams, and the material utilization rate is 26.6%. It can be seen that the production efficiency can be increased by about 2.6 times, the material utilization rate can be increased by about 5 times, and in the mass production process, the production capacity can be significantly improved, the material utilization rate can be improved, and the production cost can be effectively reduced.

[0028] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of the characteristics in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the patent. The protection scope claimed in this application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A method for upsetting a support plate screw, characterized in that: Includes the following steps: A. Blanking: Cut rod-shaped metal into blanks. The length of the blank is 2.5-3 times the length of the support plate screw, and the diameter of the blank is 1.3-1.5 times the nominal diameter of the support plate screw. B. Hot upsetting: After heating the billet, it is placed in a hot upsetting mold and hot upsetting is performed to form a circular slab in the middle. One side of the slab is a rod blank and the other side is a residual rod. C. Machining: Machining to remove excess material from the rod and machining the end face of the slab. After re-clamping, machining the outer circle, chamfer, and the other end face of the slab. D. Punching process: The blank is placed into the punching die and punched to form a support plate; E. Thread rolling: The blank is placed in a thread rolling machine to roll the rod blank into a thread.

2. The upsetting method for a support plate screw according to claim 1, characterized in that: In step B, the machining allowance on one side of the slab is greater than 2mm, and the radial machining allowance of the rod blank is greater than 2mm.

3. The upsetting method for a support plate screw according to claim 2, characterized in that: In step D, the slab is punched into a rhomboid pallet, and rounded transition edges are punched at the four corners of the pallet. At the same time, two through holes located on both sides of the rod are formed on the long axis of the pallet.

4. The upsetting method for a support plate screw according to claim 3, characterized in that: Step B controls the single-piece working time to be less than or equal to 0.65 min / piece.

5. The upsetting method for a support plate screw according to claim 4, characterized in that: Step C controls the single-piece working time to be less than or equal to 5 minutes / piece.

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