Reverse reducing tool die for full-thread fastener

Abstract

The utility model discloses a full-thread fastener reverse reducing tool die which comprises an upper die plate and a lower bottom plate, an upper die base is fixed on the upper die plate, a material returning rod sleeve is installed on the upper die plate, an upper die cushion, a rod reducing die and a rod reducing die sleeve are installed in the upper die base, the rod reducing die sleeve and the rod reducing die are fixed on the upper die base through back caps, and the material returning rod sleeve is installed on the lower bottom plate. A material returning rod sequentially penetrates through holes of the material returning rod sleeve, the upper die cushion and the rod shrinking die; and a lower die holder is fixed on the lower bottom plate, and a lower guide die is arranged on the lower die holder. Compared with the prior art, the hole shrinkage tool has the advantages that the novel hole shrinkage tool is provided, and the hole shrinkage problem of bolts with full threads or short thick rods is solved by designing the reverse hole shrinkage tool die for the full-thread fastener.

Description

TECHNICAL FIELD

[0001] The utility model relates to a full thread fastener reverse shrinkage diameter tooling die, propose a general shrinkage diameter tooling suitable for all full thread or short bolt of the length of the thick rod. BACKGROUND

[0002] At present, along with the high speed development of our country, high strength bolt is widely used in railway system and mechanical system of our country, and the demand of full thread bolt or short bolt of the length of the thick rod increases, such as Figure 1 As shown, due to the influence of head forming, the thick rod appears the phenomenon of thickening, needs to be turned before the thread is processed, and the turning efficiency is low, and the quality is unstable. Along with the demand of full thread bolt being more and more large, the specification is more and more, and the production efficiency of product is higher and higher, in order to improve the efficiency, a full thread fastener reverse shrinkage diameter tooling die is designed. UTILITY MODEL CONTENTS

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a full thread fastener reverse shrinkage diameter tooling die, aims at solving the problem that full thread and short bolt of the length of the thick rod cannot shrink the rod, through the reasonable design of the die structure, the reverse shrinkage rod after the full thread and short bolt of the length of the thick rod is formed is realized.

[0004] The utility model discloses a full thread fastener reverse shrinkage diameter tooling die, including upper die plate and lower bottom plate, fixed upper die seat on the upper die plate, install the material withdrawal rod sleeve on the upper die plate, load the upper die pad and the clearance fit shrinkage rod mould and shrinkage rod mould sleeve in the upper die seat, adopt the back cap to fix the shrinkage rod mould sleeve and shrinkage rod mould on the upper die seat, and the material withdrawal rod is successively worn into the hole of material withdrawal rod sleeve, upper die pad and shrinkage rod mould;Fixed lower die seat on the lower bottom plate, set up lower guide mould on the lower die seat.

[0005] Further, the upper die seat adopts the inner hexagonal cylindrical screw and spring washer and is fixed on the upper die plate.

[0006] Further, the upper die plate adopts the inner hexagonal cylindrical screw and flat washer and is fixed on the T-shaped slider of the press machine.

[0007] Further, the shrinkage rod mould is provided with the inclination for guiding at the location of the sizing belt.

[0008] Further, the lower die seat adopts the inner hexagonal cylindrical screw and is fixed on the lower bottom plate.

[0009] Further, the lower bottom plate adopts the bottom plate pressing plate and cooperates with the hexagonal nut and square head bolt and is fixed on the workbench of the press machine.

[0010] Further, the lower die seat is provided with the hole and is clearance fit with the lower guide mould.

[0011] Further, the lower guide die is fixed on the lower die base by the pressing plate and the inner hexagonal cylindrical screw.

[0012] Further, a positioning groove is arranged on the upper end of the lower guide die, and the diameter of the positioning groove is equal to the length of the diagonal of the head of the bolt.

[0013] Compared with the prior art, the utility model has the positive effects that:

[0014] The utility model discloses a novel shrinkage tool, which is a full-thread fastener reverse shrinkage tool die, and solves the problem of shrinkage of a bolt with full thread or a short length.

[0015] (1) The utility model discloses a structure of a shrinkage die, which is provided with a slope guide, so that the product can be automatically centered during production.

[0016] (2) The utility model discloses a structure of a head guide die, which adopts head positioning when the rod is shrunk, so that the operation is simple and positioning is easy, and the consistency and stability of the product performance are ensured. DRAWINGS

[0017] The utility model will be illustrated by examples and with reference to the drawings, wherein:

[0018] Figure 1 The drawings show the schematic diagram of the bolt before and after shrinkage, wherein (1) is before shrinkage, and (2) is after shrinkage.

[0019] Figure 2 The drawing is a structure schematic diagram of the full-thread fastener reverse shrinkage tool die of the utility model.

[0020] Figure 3 The drawing is a structure schematic diagram of the shrinkage die 18 of the utility model.

[0021] Figure 4 The drawing is a structure schematic diagram of the lower guide die 5 of the utility model.

[0022] The drawing includes the following reference signs: lower bottom plate 1, lower die base 2, inner hexagonal cylindrical screw 3, pressing plate 4, lower guide die 5, back head 6, upper die base 7, inner hexagonal cylindrical screw 8, spring washer 9, inner hexagonal cylindrical screw 10, flat washer 11, T-shaped block 12, upper die plate 13, material removal rod sleeve 14, material removal rod 15, upper die pad 16, shrinkage die sleeve 17, shrinkage die 18, inner hexagonal cylindrical screw 19, hexagonal nut 20, bottom plate pressing plate 21, square head bolt 22, positioning groove 23. DETAILED DESCRIPTION

[0023] The drawing is a structure schematic diagram of the full-thread fastener reverse shrinkage tool die of the utility model. Figure 2As shown, including: the lower bottom plate 1, lower die seat 2, hexagonal cylinder screw 3, pressing plate 4, lower guide die 5, back 6, upper die seat 7, hexagonal cylinder screw 8, spring washer 9, hexagonal cylinder screw 10, flat washer 11, T block 12, upper die plate 13, material withdrawal rod sleeve 14, material withdrawal rod 15, upper die pad 16, shrink rod die sleeve 17, shrink rod die 18, hexagonal cylinder screw 19, hexagonal nut 20, bottom plate pressing plate 21, square head bolt 22, wherein:

[0024] The upper die plate 13 is fixed on the T block 12 of the press machine by the hexagonal cylinder screw 10 and the flat washer 11, and the upper die seat 7 is fixed on the upper die plate 13 by the hexagonal cylinder screw 8 and the spring washer 9.

[0025] The lower bottom plate 1 is fixed on the workbench of the press machine by the bottom plate pressing plate 21, the hexagonal nut 20 and the square head bolt 22, and the lower die seat 2 is fixed on the lower bottom plate 1 by the hexagonal cylinder screw 3.

[0026] The structure of the shrink rod die 18 is as shown in the figure, Figure 3 A slope guide is added at the location of the sizing belt to realize automatic centering of the product.

[0027] The structure of the lower guide die 5 is as shown in the figure, Figure 4 A positioning groove 23 is arranged at the upper end, and the diameter of the positioning groove 23 is equal to the length of the diagonal of the bolt head.

[0028] The use method of the full-thread fastener reverse shrinkage tooling die comprises the following steps:

[0029] Step one, the upper die plate 13 is fixed on the T block 12 of the press machine by the hexagonal cylinder screw 10 and the flat washer 11, and the upper die seat 7 is fixed on the upper die plate 13 by the hexagonal cylinder screw 8 and the spring washer 9.

[0030] Step two, the material withdrawal rod sleeve 14 is installed in the upper die plate 13, the upper die pad 16 is installed in the upper die seat 7, the shrink rod die 18 is installed in the shrink rod die sleeve 17 in a clearance fit, the shrink rod die sleeve 17 and the shrink rod die 18 are integrally installed in the upper die seat 7, then the shrink rod die sleeve 17 and the shrink rod die 18 are fixed on the upper die seat 7 by the back cap 6, and finally the material withdrawal rod 15 is sequentially inserted into the holes of the material withdrawal rod sleeve 14, the upper die pad 16 and the shrink rod die 18.

[0031] Step three, the lower base 1 is fixed on the workbench of the press by using the base plate 21 in cooperation with the hexagon nut 20 and the square head bolt 22, and then the lower die seat 2 is fixed on the lower base 1 by using the inner hexagonal cylindrical screw 3, the lower guide die 5 is put into the clearance-fitted hole between the lower die seat 2, and the lower guide die 5 is fixed on the lower die seat 2 by using the pressing plate 4 through the inner hexagonal cylindrical screw 19;

[0032] Step four, the product head is placed upside down in the lower guide die 5, the press is started to drive the sliding block to move downward, and the product rod is passively pressed into the shrink rod die 18 to form a cold extrusion reduced diameter;

[0033] Step five, after the diameter reduction is completed, the press drives the sliding block to move upward, when the material withdrawal rod 15 is on the material withdrawal beam fixed on the equipment, the material withdrawal rod 15 is forced to push the reduced diameter product moving upward with the sliding block out of the shrink rod die 18, and the material is withdrawn.

Claims

1. A full thread fastener reverse undersize tooling die characterized by: It comprises an upper die plate, a lower base plate, an upper die holder fixed on the upper die plate, a material withdrawal rod sleeve installed on the upper die plate, an upper die cushion and a gap-fitted shrink rod die and shrink rod die sleeve installed in the upper die holder, a back cap used to fix the shrink rod die sleeve and the shrink rod die on the upper die holder, and a material withdrawal rod sequentially inserted into the holes of the material withdrawal rod sleeve, the upper die cushion and the shrink rod die; a lower die holder fixed on the lower base plate and a lower guide die arranged on the lower die holder.

2. A full thread fastener reverse reducing tooling die according to claim 1 wherein: The upper die holder is fixed on the upper die plate by means of an inner hexagonal cylindrical screw and a spring washer.

3. A full thread fastener reverse reducing tooling die according to claim 1 wherein: The upper die plate is fixed on the T-shaped slider of a press by means of an inner hexagonal cylindrical screw and a flat washer.

4. A full thread fastener reverse reducing tooling die according to claim 1 wherein: An inclination is arranged at the location of the sizing belt of the shrink rod die for guiding.

5. A full thread fastener reverse reducing tooling die according to claim 1 wherein: The lower die holder is fixed on the lower base plate by means of an inner hexagonal cylindrical screw.

6. A full thread fastener reverse reducing tooling die according to claim 1 wherein: The lower base plate is fixed on the worktable of a press by means of a base plate pressing plate, a hexagonal nut and a square head bolt.

7. A full thread fastener reverse reducing tooling die according to claim 1 wherein: A hole gap-fitted with the lower guide die is arranged on the lower die holder.

8. A full thread fastener reverse reducing tooling die according to claim 1 wherein: The lower guide die is fixed on the lower die holder by means of a pressing plate and an inner hexagonal cylindrical screw.

9. A full thread fastener reverse reducing tooling die according to claim 1 wherein: A positioning groove is arranged at the upper end of the lower guide die, and the diameter of the positioning groove is equal to the length of the diagonal of the head of the bolt.

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